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EPS MANUAL VERSION 1.0

EPS MANUAL

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CONTENTS

1 The purpose of this Manual 4 2 Introduction to the new standard 6 3 Assembly Verification 8 4 The EPS System 10

4.1 The assembly frame 10

4.2 Vertical sections 10

4.3 Busbar 11

4.4 Sections 11

4.4.1 Incoming sections 12

4.4.2 Outgoing sections 13

4.4.3 Cable sections 17

5 Assembly design 19 5.1 Assembly specifications 19

5.1.1 Electrical system. Details on the electrical system to which the assembly will be connected: 19

5.1.2 Electrical diagram 19

5.1.3 Service conditions 19

5.1.4 Assembly requirements 19

5.2 Assembly layout 20

5.2.1 Main busbar 20

5.2.2 Incoming sections 20

5.2.3 Outgoing sections 21

5.2.4 Cable sections. 21

5.2.5 Distribution busbars 21

5.3 Assembly currents 22

5.3.1 Outgoing circuits 22


5.3.3 Main busbar and incoming circuit 22

5.4 Assembly short-circuit currents 23

5.4.1 Incoming switch 23

5.4.2 Main busbar 23

5.4.3 Outgoing circuits 23


5.5 Verification of switches 23

5.5.1 Changes from the tested design 23

5.5.2 Simplified calculations for choosing the right switches 24

5.5.3 Complete calculation 26

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THE PURPOSE OF THIS MANUAL 1

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1 THE PURPOSE OF THIS MANUAL

The purpose of the EPS Manual is to offer support to customers on how to design a panel with the nVent HOFFMAN EPS system that complies with the standard IEC 61439. The content of the Manual is based on completed tests that have been initiated by nVent HOFFMAN.

The tests referred to in the Manual include: Tests carried out by KEMA according to IEC 62208 (national standard EN 62208); Tests carried out by Intertek-Semko according to IEC 61439 (national standard EN 61439).

By going through and following the instructions in this Manual, the design of the electrical panel will be easier and faster, and further tests can be avoided.

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INTRODUCTION TO THE NEW STANDARD 2

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2 INTRODUCTION TO THE NEW STANDARD

In November 2014 the new standard IEC 61439, “Low-voltage switchgear and controlgear assemblies” became the main relevant standard for the design and manufacturing of electrical panels (switchgear and controlgear assemblies) as well as for other products covered by the previous standard, IEC 60439.

The new standard, IEC 61439, is structured in a different way compared to IEC 60439.The new standard comprises the following parts:

Part - 1 General rules

Part - 2 Power switchgear and control assemblies (IEC 60439-1)

Part - 3 Distribution boards (IEC 60439-3)

Part - 4 Assemblies for construction sites (IEC 60439-4)

Part - 5 Assemblies for power distribution (IEC 60439-5)

Part - 6 Busbar trunking systems (IEC 60439-2)

Part - 0 Guidance to specify assemblies (IEC 60439-0)

Part -1 is always needed together with the relevant part for each product group. Switchgear is defined by Part -1 and Part -2.

Although the formal changes between the old and the new standards are significant, the technical content is similar. For example, equipment tested according to the old standard for TTA-equipment do not have to be retested for acceptance to the new standard.

The new standard provides more options and better explanations for some functions:

The responsibilities for the “Original Manufacturer”, who performs the Design Verification, and

the “Assembly Manufacturer”, who manufactures the complete assembly to be installed and performs the Routine Verification, are made clearer;

TTA and PTTA category tests are replaced by Design Verification; There are three ways to achieve Design Verification:

• by testing; • by comparing with the tested reference design; • by calculation and design rules.

There is a possibility to make changes from the tested design by comparing with a reference

design.

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ASSEMBLY VERIFICATION 3

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3 ASSEMBLY VERIFICATION

The verification of the EPS system comprises testing according to the specifications in IEC 61439-1 and -2. As the enclosures for the EPS sections already are tested according to IEC 62208, Empty Enclosures, some of the tests are completed, which means there is no need for further tests. The assembly verification encompass design verification and routine verification:

Design verification, which is the responsibility of the Original Manufacturer, comprises tests of:

• strength of materials and parts (IEC 62208); • degree of protection of enclosures (IEC 62208); • clearance and creepage distances; • protection against electric shock; • incorporation of switching devices and components; • internal electric circuits and connections; • terminals for external conductors; • dielectric properties; • impulse withstand voltage test; • verification of temperature rise; • short-circuit withstand strength; • electromagnetic compatibility; • mechanical operation.

Routine verification, which is the responsibility of the Assembly Manufacturer,

comprises tests of:

• degree of protection of enclosures; • clearance and creepage distances; • protection against electric shock and integrity of the protective circuits; • incorporation of built-in components; • internal electric circuits and connections; • terminals for external conductors; • mechanical operations; • dielectric properties; • wiring, operational performance and function.

Since nVent HOFFMAN is an Original Manufacturer, the design verification has to be completed. It was conducted at Intertek-Semko in Sweden. The verification encompassed testing according to the specifications in IEC 61439-1 and -2. When building complete assemblies for installation at the end-user the Assembly Manufacturer is responsible for:

Using an original system, which has a design verification according to IEC 61439; Using approved components to each relevant standard, i.e. switches to IEC 60947; Following assembly instructions from the suppliers of components; Following assembly instructions from the supplier of the original system; Building up the assembly according to the specifications in IEC 61439; Performing the routine verification according to IEC 61439 and register the verification.

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THE EPS SYSTEM 4

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4 THE EPS SYSTEM

The EPS system kits contain the main product and necessary items to mount the product into the assemblies.

4.1 The assembly frame

The MCSL enclosure range allows for building the sections required according to the specified configuration. This means the enclosure can be divided in different vertical sections with the required divisions.

The range offers heights of 1800, 2000 or 2200mm, and widths of 400, 600, 800, 1000 or 1200mm, with depths of 400, 600 or 800mm.

Every configuration of enclosures need to be supplemented with side panels, SPM, and joined with external baying brackets, CCE and CCEH, or internal baying brackets, CCI and CCM.

The enclosure can be mounted on plinths, PF, 100 or 200mm high, or ventilated plinths, PV, 100mm high. The plinths must be closed with side panels, PS, 100 or 200mm high.

If more than one enclosure is used, the plinths can be connected by using plinth combining profiles, PCP, to provide stability to the plinth structure.

Busbars can be installed in a dedicated space at the top of the enclosure with a frame, MCU, 200 or 300mm high, or in the bottom of the enclosure with a busbar frame, PCU, 200 or 300mm high. Both frames need to be closed with side panels, MCUP for MCU, and PCUP for PCU.

If extra ventilation is required, a ventilation roof, CVR, may be used. It increases the height of the enclosure with 40mm.

If eye bolts are required for lifting one enclosure, eye bolts, LE, may be mounted directly on the frame corner parts of the enclosure. For two or more enclosures, eye bolts, LC, together with internal corner brackets, CCM, should be used to ensure optimal weight distribution.

Each enclosure can be closed in the bottom with plain bottom plates, CBP, or ventilated bottom plates, CVB.

4.2 Vertical sections

The EPS assemblies constitute a composition of vertical sections. Each section may be in a dedicated enclosure (one enclosure – one vertical section), or there may be several sections in the same enclosure. Vertical divisions with a vertical dividing bar, VBD, and fixing brackets, VBK, will have to be used in such cases. The divisions are based on the enclosure frame construction.

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4.3 Busbar

The main busbar can be placed in four different ways:

Horizontally, in the rear of the assembly with a busbar support, MSHS, mounted on the internal side panels, MSPS. It can then be used in assemblies vertically segregated. Up to 3 600A

Horizontally, in the top of the assembly, where it in turn can be placed:

• In a dedicated space with a busbar support, EUBS, mounted in an additional frame, MCU (200 or 300mm height). Up to 4 500A.

• Inside the enclosure with a busbar support, EUBS, mounted directly to the enclosure frame, or by using CLPF profiles. Up to 4 500A.

Horizontally, in the bottom of the assembly:

• In a dedicated space with a busbar support, EUBS, mounted on an additional plinth, PCU (200 or 300mm height). Up to 4 500A

• Inside the enclosure with a busbar support, EUBS, mounted directly to the enclosure frame, or by using CLPF profiles. Up to 4 500A.

Vertically, on the side of the vertical section with a busbar support, ECBS, in a vertical section of

two hundred of width. To be used in assemblies with one or two incoming/outgoing sections mounted on CLPF profiles in depth. For assemblies with 400mm depth, CLPF profiles are not required.

The distribution busbar can be placed:

Vertically in the rear of the section:

• In a fixed vertical section with a busbar support, MSFH, mounted on the vertical profiles, MSFP. Up to 1 600A.

• In a plug-in vertical section with a busbar support, MSVH mounted on the vertical profiles included in the MSSB kit. Up to 1 600A

Vertically on the side of the vertical section with a busbar support, ECBS, in a vertical section of

two hundred of width. For assemblies with 400mm depth, CLPF profiles are not required.

4.4 Sections

The EPS System has been developed to allow for designing the assembly using vertical sections, which are constructional units of an assembly between two successive vertical delineations. Each vertical section may be divided into sub-sections.

The following aspects need to be considered when designing a vertical section:

External doors: Can the same type be used for the complete section Front panels: Depending on the types of component, can it vary from one subsection to another Mounting level: Can it vary from one subsection for another Segregation form: Segregation form to be applied according to the standard 61439 between the

subsections and the busbar.

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4.4.1 Incoming sections

Incoming units can be mounted in a dedicated section or inside the outgoing section. Here are some details to bear in mind:

In a dedicated section: Incoming sections are available in 600, 800 and 1000mm width sections.

External doors:

• Complete doors:

- Plain doors, DN; - Transparent doors, DNG.

• Partial doors:

- DP, with top & bottom plain panels, DPC; - DP, with top & bottom ventilated panels, DPCV.

When a shelf for Air Circuit Breakers (ACB) needs to be included, front panels cannot be installed; the components can only be covered with a complete door, DN, or DNG, or with partial doors, DP with top & bottom plain or ventilated panels DPC or DPCV may be used.

Types of subsections:

• Switch subsection: A subsection in which the incoming switch is installed. Depending on the assembly, the following solutions are available:

- Shelfs:

- For ACB (Air Circuit Breakers) require a shelf, MSCC, which in turn requires MSPS internal side panels.

- Components can be covered with a complete door, DN, or DNG, or with a partial door, DP.

- Profile system:

- For ACB (Air Circuit Breakers) or MCCB (Molded Case Circuit Breakers): CLPK and CLPF profiles cannot be used when MSPS internal side panels are installed.


- Mounting plate:

- For MCCB (Molded Case Circuit Breakers) with the mounting plate MSMPN, with or without openings, requires vertical profiles, MSFP.

- The mounting plate can be adjusted in depth with brackets MSMPA01, except for those with horizontal opening.


An ACB subsection with a shelf cannot be combined with an ACB subsection with profiles.

• Free design subsection: A subsection in which measuring components or other components will be installed on a mounting plate, MSMPN, with or without openings, require vertical profiles, MSFP.

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Mounting plates can be adjusted in depth with brackets, MSMPA01, except for those with horizontal opening.

The subsection can be covered with a complete door, DN, or DNG, or with a partial door, DP.

• Cabling subsection: An empty subsection in which the switch feeding connection is

made. The subsection can be covered with a complete door, DN, or DNG, or with a partial door, DP.

Segregation form:

• Form 2: Depending on the busbar position, segregation can be made from the functional units by using mounting plates, MSMPN, side panels, MSPS, or a top/bottom shelf, MSCC.

• Form 3: A shelf, MSCC, must be used between functional units. • Form 4: A dedicated subsection must be used for the ACB-feeding. Segregation from the

rear busbar must be handled by a panel builder.

Inside the outgoing section. In this case, the incoming section will be considered an outgoing section.

4.4.2 Outgoing sections

Outgoing units are available in 600 and 800mm width sections, and specific systems are available for different applications:

Modular system The modular system is available in 600 and 800mm width sections. The system is based on a frame MSMSF, which is fixed directly to the enclosure. It allows for two mountings levels, rear level, for the mounting of the components, and front level, to cover the components with front panels.

External doors:

• Complete doors:

- Plain doors DN; - Transparent doors DNG.

• The components can be covered with two types of front panels, depending on the types of components:

- Plain front panels MSMBP; - Slotted front panels MSMCP.

Type of subsection

• Switch subsection: A subsection in which the switches are installed. Depending on the assembly, the following solutions are available:

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- Mounting plate:

- For MCCB (Molded Case Circuit Breakers) with the mounting plate, MSMPN, with or without openings.

- The mounting plate can be adjusted in depth with brackets MSMPA01, except for those with horizontal opening.

- Components can be covered with a plain front panel, MSMBP, and a complete door, DN, or DNG.

- Profile system:

- For ACB (Air Circuit Breakers) or MCCB (Molded Case Circuit Breakers): CLPK and CLPF profiles cannot be used when MSPS internal side panels are installed.


- Continuous Adjustment Profiles:

- For MCCB (Molded Case Circuit Breakers): APK and CLPF profiles adjustable in depth, cannot be used when MSPS internal side panels are installed.


- DIN rails:

- For modular components with the slotted front panels, MSMCP, and a complete door, DN, or DNG.

- - The DIN rail can be fixed with fixed brackets MSMPF01 or adjusted in depth with

adjustable brackets MSMPA01.

• Free design subsection: A subsection in which measuring or other components will be installed on a mounting plate, MSMPN, with or without openings. Mounting plates can be adjusted in depth with adjustable brackets MSMPA01, except for those with horizontal opening. The subsection can be covered with a plain front panel, MSMBP, and a complete door, DN, or DNG.

• Cabling subsection: An empty subsection in which terminal blocks are installed on a

DIN rail, MSDR, and covered with a plain front panel MSMBP and a complete door, DN, or DNG. The DIN rail can be fixed with fixed brackets MSMPF01 or adjusted in depth with adjustable brackets MSMPA01.

• Empty subsection: An empty subsection which can be covered with a plain front panel

MSMBP and a complete door, DN, or DNG.

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Fix system

The fix system is available in 600 and 800mm width sections. The system is based on vertical profiles MSFP, which are fixed directly to the enclosure frame:

External doors:

• Complete doors:

- Plain doors DN; - Transparent doors DNG.

• Partial doors:

- DP, with top & bottom plain panels DPC; - DP, with top & bottom ventilated panels DPCV.

When front protection is required, front panels can be installed between the complete door, DN, or DNG, and the components using front cover profiles MSFCP. Depending on the components, the following can be installed:

• Plain front panels MSMBP; • Slotted front panels MSMCP.

It is also possible to cover the components with partial doors, DP, with top & bottom plain or ventilated panels, DPC, or DPCV. Front panels cannot be installed together with partial doors.

Type of subsection:

• Switch subsection: A subsection in which switches are installed. Depending on the assembly, the following solutions are available:

- Mounting plate:

- For MCCB (Molded Case Circuit Breakers) with the mounting plate, MSMPN, with or without openings. The mounting plate can be adjusted in depth with brackets MSMPA01, except for those with horizontal opening. Components can be covered with a plain front panel, MSMBP, or/and a complete door, DN, or DNG, or with a partial door, DP.

- Profile system:

- For ACB (Air Circuit Breakers) or MCCB (Molded Case Circuit Breakers): CLPK and CLPF profiles cannot be used when MSPS internal side panels are installed. Components can be covered with a plain front panel, MSMBP, or/and a complete door, DN, or DNG, or with a partial door, DP.

- Continuous Adjustment Profiles:

- For MCCB (Molded Case Circuit Breakers): APK and CLPF profiles adjustable in depth, cannot be used when MSPS internal side panels are installed. Components can be covered with a plain front panel, MSMBP, or/and a complete door, DN, or DNG, or with a partial door, DP.

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- DIN rails:

- For modular components with the slotted front panels, MSMCP, or/and a complete door, DN, or DNG, or with a partial door, DP.

- The DIN rail can be fixed with holders MSADP or adjusted in depth with brackets MSMPA01.

• Free design subsection: A subsection in which measuring or other components will be installed on a mounting plate, MSMPN, with or without openings. Mounting plates can be adjusted in depth with brackets MSMPA01, except for those with horizontal opening. The subsection can be covered with a plain front panel, MSMBP, or/and a complete door, DN, or DNG, or with a partial door DP.

• Cabling subsection: An empty subsection in which terminal blocks are installed on a DIN rail, MSDR, and covered with a plain front panel MSMBP or/and a complete door, DN, or DNG, or with a partial door DP. The DIN rail can be fixed with holders MSADP or adjusted in depth with brackets MSMPA01.

• Empty subsection: An empty subsection which can be covered with a plain front panel MSMBP or/and a complete door, DN, or DNG, or with a partial door DP.

Busbar: The busbar can be placed vertically in the rear of the fix section with the busbar support,

MSFH, mounted on vertical profiles, MSFP. The rated current is up to 1 600A and the rated short-time withstand current is up to 35kA, with rear supports, and up to 50kA with rear and front supports.

Segregation form: The fix system allows for up to Form 4 segregation according to IEC 61439-1 using different accessories:

Form 2: Depending on the busbar position, segregation from the functional units is possible by using mounting plates, MSMPN, side panels, MSPS, or internal/external segregation plates, MSIS or MSES.

When Form 2b is required, the cable section must be segregated from the busbar as well, which can be done with the accessory MSPM.

Form 3: Using the separation plates, MSIS/MSES for separation between functional units: Vertical profiles, MSFP, must be mounted as described in the mounting instructions.

Form 4: Using cable boxes, MSCE: Vertical profiles, MSFP, must be mounted as described in the mounting instructions.

Plug-in system

The plug-in system is available in 600mm width sections. This system is based on a vertical profile, MSSB. Internal side panels, MSPS, must be installed on both sides of the enclosure when using this system.

External doors:

• Partial doors:

- DP, with top & bottom plain panels, DPC; - DP, with top & bottom ventilated panels, DPCV.

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Type of subsection:

• Plug-in subsection: A plug-in cubicle, MSCP, which is connected to the MSBS vertical busbar. A mounting plate, MSCM, has to be mounted in the plug-in cubicle MSCP, which can be covered with a partial door, DP.

• Empty subsection: An empty subsection, which can be covered with a partial door, DP. Busbar:

The busbar MSBS is placed vertically in the rear of the plug-in section with a busbar support, MSVH, mounted on the vertical profiles included in the MSSB kit.

The rated current is up to 1 600A and the rated short-time withstand current is up to 35kA, with rear supports, and up to 50kA with rear and front supports.

Segregation form: Form 2: Is guaranteed by a rear cover plate, MSSB, to separate the plug-in sections from the plug-in busbars. Form 3: Is guaranteed by using MSCH, a top cover for plug-in compartments, between functional units. Form 4: Is guaranteed by using cable boxes, MSCE.

4.4.3 Cable sections

Cable sections are available in 400 and 600mm width sections.

External doors:

• Complete doors:

- Plain doors, DN.

• Partial doors

- DPA, with top & bottom plain panels, DPC; - DPA, with top & bottom ventilated panels, DPCV.

Segregation: Segregation between the front space and busbar space can be achieved with a separation plate, MSPM. Simple fixation of the cables in the rear part, or side part of the cable section can be done by using MSCFR or MSCFS profiles.

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ASSEMBLY DESIGN 5

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5 ASSEMBLY DESIGN The steps to go through to complete the assembly design with nVent HOFFMAN Power System (EPS) products are presented in this section.

5.1 Assembly specifications

Information provided by the end user often comprise several different documents. It can be divided into four parts:

5.1.1 Electrical system. Details on the electrical system to which the assembly will be connected:

Voltage of the electrical system; Transient overvoltages; Rated current for the different circuits in the assembly (incoming and outgoing); Peak value of the prospective short-circuit current of the supply system; Prospective r.m.s. value of the short-circuit current (Icp) at each point of connection to the supply; Rated diversity factor (RDF) for groups of circuits or for the whole assembly; Rated frequency.

5.1.2 Electrical diagram

An electrical diagram showing the electrical function of incoming and outgoing units, and other components like measuring equipment, earth fault detection, etc.

5.1.3 Service conditions

Pollution degree; Indoor or outdoor installation; Electromagnetic compatibility (EMC) classification.

5.1.4 Assembly requirements

Protection degree; Mechanical impact protection; External design; Type of construction (fixed or removable parts); Overall dimensions; Required transport devices; Form segregation.

EPS enclosures and accessories can be selected with the information above at hand to fulfil requirements such as protection degree and segregation form.

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5.2 Assembly layout

Based on customer requirements and field installation limitations, some decisions must be taken, if not already specified in the project information, since it will affect the layout of the assembly:

Height of the assembly; Depth of the assembly; Required access to the functional units or busbars in the field.

5.2.1 Main busbar

The busbar position in the assembly depends on whether the main switch will be in the top or bottom and if easy access to the busbar is required. The busbar type to be selected must comply with the required rated current (In), and the rated short-time withstand current (Icw). There are several alternatives:

Top horizontal main busbar, with EUBS busbar supports. Can be placed in the top of the enclosure in two different ways.

• Fixed on the enclosure frame, reducing the useful height of the vertical section by 200 mm;

• Fixed on a dedicated space using the MCU frame which increases the assembly height by 200 or 300 mm.

Bottom horizontal main busbar, with EUBS busbar supports: Can be placed in the bottom of the

enclosure in two different ways:

• Fixed on the enclosure frame, reducing the useful height of the vertical section by 200 mm;

• Fixed on a dedicated space using the PCU frame which increases the assembly height by 200 or 300 mm;

Rear horizontal main busbar, with MSHS busbar supports: Side separation, MSPS, must be

selected when MSHS supports are used;

Side horizontal main busbar, with ECBS busbar supports: A busbar vertical section is required for fastening the busbar.

5.2.2 Incoming sections

Incoming switches can be placed either in a dedicated vertical section or be part of an outgoing vertical section. If the switch is part of an outgoing vertical section, it must be treated as another outgoing subsection during the design process.

There are different types of subsections available for dedicated incoming vertical sections:

Switch subsection with different options for switch assembly: ACB (Air Circuit Breaker) on a shelf and MCCB (Molded Case Circuit Breaker), fixed with profiles or a mounting plate;

Free design subsection with mounting plate; Cabling subsection without mounting facilities.

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The number and size of incoming sections depends on:

The number of incoming switches; The size of the incoming switches; Assembly requirements: Whether or not the assembly requirements allow for more than one

switch in the same section;

Table XX presents recommended section sizes for different ACB and MCCB switches.

5.2.3 Outgoing sections

Several different types of outgoing vertical sections can be designed:

Modular vertical sections: Cost effective solution, which does not provide segregation between the subsections. A distribution busbar cannot be placed in the rear of the subsections;

Fix vertical sections: A solution which provides segregation up to Form 4 between the subsections. A distribution busbar can be placed in the rear of subsections;

Plug-in vertical sections: A solution with segregation Form 4, where the distribution busbar is placed in the rear of subsections.

The number and size of the outgoing sections depends on: The type of outgoing section, which depends on the assembly specifications, such as

segregation form;

Useful height of the outgoing sections. Table XX in Annex 01 provides useful heights for each type of outgoing section and main busbar configuration;

Size of outgoing switches. Table XX in Annex 01 provides recommended subsection sizes for different types, sizes and brands of switches;

The number of outgoing switches.

5.2.4 Cable sections.

Cable sections are available in 400 and 600mm widths.

The number and size of cable sections depend on:

Outgoing cable sizes; The number of outgoing sections.

5.2.5 Distribution busbars

There are different solutions for the outgoing sections that are fed from the distribution busbar:

Modular outgoing section: The distribution busbar, with ECBS busbar supports, will be placed in a dedicated busbar section on the side;

Fixed outgoing section, where there are two options for feeding the distribution busbar:

• Side distribution busbar, with ECBS busbar supports, placed in a dedicated busbar section;

• Rear distribution busbar, with MSFH busbar supports, fixed in the fix system vertical profiles.

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Plug-in outgoing section: The distribution plug-in busbar, MSBS, and the plug-in busbar supports, MSVH, will be placed on plug-in system vertical profiles.

The number of busbar sections required depends on the type and number of outgoing sections and the type of distribution busbars selected.

5.3 Assembly currents

Each outgoing circuit in the assembly specification has its rated current. The circuit must be capable of carrying that current, but in reality not all circuits will carry its rated current continuously and simultaneously. It is therefore unnecessary and inefficient to consider full load in all circuits at the same time when doing thermal calculations. Currents are therefore calculated by using the rated diversity factor.

The rated diversity factor is the per unit value of the rated current, assigned by the assembly manufacturer, to which outgoing circuits of an assembly can be continuously and simultaneously loaded taking into account the mutual thermal influences.

The rated diversity factor can be specified for:

Groups of circuits, normally vertical sections; The whole assembly.

In the absence of an agreement with the end user concerning the actual load currents, the assumed loading of the outgoing circuits of the assembly or group of outgoing circuits may be based on the Rated Diversity Factor (RDF), which is defined in the table 101 included in the standard IEC 61439-2. This table is included in this manual as Table XX in Annex 01.

5.3.1 Outgoing circuits

The most common way to use the rated diversity factor in the assemblies is to apply it to each vertical section, with the exception of small switches in one section. These will be grouped by size and the rated diversity factor will be applied for each group.

Following this method, a current will be calculated for each outgoing vertical section.


The calculated current for the different distribution busbars will be obtained from the sum of the currents of the outgoing vertical sections that are fed by each distribution busbar.

The number and size of bars for each distribution busbar can be defined based on the calculated current and allowed temperature increase by using Table XX in Annex 01.

5.3.3 Main busbar and incoming circuit

The calculated current for the main busbar and the incoming circuit will be obtained from the sum of the currents of the different distribution busbars fed by the main busbar. The assembly is normally prepared for future extensions. The current to be taken in consideration then, for the incoming circuit and main busbar, is the rated current of the incoming switch.

The number and size of bars for the main busbar can be defined based on the calculated current and allowed temperature increase by using Table XX in Annex 01.

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5.4 Assembly short-circuit currents

Short-circuit withstand value is normally stated in the assembly specifications, but if it is not stated, and the power transformer is feeding the assembly only, the short-circuit withstand current at the transformer terminals can be estimated based on the rated current of the assembly by using Table XX in Annex 01.

5.4.1 Incoming switch

If the short-circuit current is stated in the assembly specifications, it is the current at which the incoming switch must be able to break. If the short-circuit current is not stated in the assembly specifications, and the incoming switch is fed by copper bars directly from the transformer, it must be able to break the short- circuit current at the transformer terminals. If the switch is fed by cables or long busbar trunking the short- circuit current shall be calculated using the attenuation of the feeding system.

5.4.2 Main busbar

The short-circuit current in the main busbar will be the same as in the incoming switch. Based on this value, and the main busbar features (number and size of bars), the values in Table XX in Annex 01 define the maximum distance between the busbar supports.

5.4.3 Outgoing circuits

If the incoming switch does not limit the short-circuit current during the breaking, and the circuits are fed directly from the main busbar, the outgoing switches must be able to break at the short-circuit current in the main busbar.

Back-up switches are usually installed before small switches, and in this situation the back-up switch will protect the switches fed, reducing the breaking capabilities.


The distribution busbars are protected by the switches that feed them. The short-circuit current will be lower than in the main busbar only if the switches fed by the distribution busbar are limiting switches.

Based on the short-circuit current and the main distribution busbar features (number and size of bars), Table XX in Annex 01 presents the maximum distance between the busbar supports.

5.5 Verification of switches

When the lay-out is defined based in the single-line electrical diagram the switches included in the assembly must be verified

5.5.1 Changes from the tested design

The tests of the EPS system include switches of different types and sizes from various suppliers, even though several additional switches may be used. The standard defines how to handle such applications with different switch sizes or brands.

If a non-tested switch is used and the design is similar to a tested design (called reference design), the temperature rise and the short-circuit performance have to be considered.

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Paragraph 10.10.4.2 in the standard provides information on temperature rise for compartments not exceeding 630A, and paragraph 10.10.4.3 provides information for compartments from 630A up to 1600A, stating:

Power loss data is available from the manufacturer of the switch; The rated current of the circuit shall not exceed 80% of the rated free air current of the switch; The conductors shall have an area based on 125% of the rated current of a free air circuit; The temperature rise evolving from power losses are available from the enclosure manufacturer

The rated current for circuit breakers is related to 40°C. The manufacturers of the switches provide derating curves for higher temperatures. nVent HOFFMAN has chosen to go for a maximum of 55°C. See calculations below.

Table 13 is a checklist comparing short-circuit performance of the actual switch with the reference design. If all requirements lead to “Yes” no further verifications are needed. If some requirements lead to “No” some verifications are needed according to 10.11.4 – Equivalent Switch, Similar Arrangement and Enclosure.

5.5.2 Simplified calculations for choosing the right switches

nVent HOFFMAN has created tables, with all requirements listed in 5.5.1 included for choosing the right switches, for a number of different switch brands, which will help simplify selection of the right switch.

The tables present the maximum current for each type and size of switch and size of sub-section. Once the right switch is identified, the maximum long time current can be identified. Please note that the switch may carry higher currents during shorter times (single hours). All tables are in the Auxiliary Documents.

Form 4:

Use the actual subsection size for each switch; If only one switch will be in the section, use the full height also if the switch is mounted behind a

small door.

Form 2:

Sum up the dissipations from all switches and compare to the allowed dissipation in Table AD 7 for full height enclosure; do not use the table;

The long-time current for each switch shall not exceed 80% of the rated current. See the example below in 9.3.2.2 where a 630A switch has a trip unit set to 500A and the long-time current is known to be 400A. The current through the switch is 400/630 = 63% of the rated current, i.e. less than 80%.

EPS MANUAL

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Example table for an ACB switch:

Circuit-Breakers ACB Type ABB Emax

Type

Rated current In

Fixed connection Draw-out Cassette Sub-Section Size IP21 IP31-43 IP54 IP21 IP31-43 IP54 Width Height

X1N 06

630A

630

630

630

630

630

630

400

600

X1N 08 800A 800 800 800 744 679 608 400 600 X1N 10 1000A 1000 974 871 745 680 609 400 600

X1N 08 800A

800

800

800

800

675

632

600

500 X1N 10 1000A 1000 1000 974 835 762 680 600 500 X1N 12 1250A 1193 1088 972 835 762 681 600 500 X1N 16 1600A 1194 1089 973 835 761 680 600 500

E1N 08

800A

800

800

800

800

800

774

600

600

E1N 10 1000A 1000 1000 963 955 869 778 600 600 E1N 12 1250A 1181 1075 963 954 868 778 600 600 E1N 16 1600A 1164 1060 949 953 867 776 600 600 E2N 10 1000A 1000 1000 1000 1000 1000 1000 600 600 E2N 12 1250A 1250 1250 1250 1250 1155 1034 600 600 E2N 16 1600A 1600 1572 1408 1263 1150 1029 600 600 E2N 20 2000A 1600 1571 1406 1274 1160 1039 600 600 E3N 20 2000A 2000 2000 1914 1784 1628 1454 800 600 E3N 25 2500A 2336 2131 1905 1788 1631 1458 800 600 E3N 32 3200A 2357 2150 1922 1793 1636 1462 800 600 E4S 40 4000A 3200 2974 2658 2407 2198 1963 1000 600 E6H 50 5000A 3794 3462 3095 2922 2666 2383 1000 600

E1N 08 800A

800

800

800

800

800

800

600

2200 E1N 10 1000A 1000 1000 1000 1000 1000 1000 600 2200 E1N 12 1250A 1250 1250 1250 1250 1250 1250 600 2200 E1N 16 1600A 1280 1280 1280 1280 1280 1280 600 2200 E2N 10 1000A 1000 1000 1000 1000 1000 1000 600 2200 E2N 12 1250A 1250 1250 1250 1250 1250 1250 600 2200 E2N 16 1600A 1600 1600 1600 1600 1600 1600 600 2200 E2N 20 2000A 1600 1600 1600 1600 1600 1600 600 2200 E3N 20 2000A 2000 2000 2000 2000 2000 2000 800 2200 E3N 25 2500A 2500 2500 2500 2500 2500 2500 800 2200 E3N 32 3200A 2560 2560 2560 2560 2560 2560 800 2200 E4S 40 4000A 3200 3200 3200 3200 3200 3200 1000 2200 E6H 50 5000A 5000 5000 5000 5000 4668 4175 1000 2200

If no tables are available from nVent HOFFMAN for the chosen switch, the following calculations have to be performed:

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5.5.3 Complete calculation

5.5.3.1. Incoming section This calculation refers to the main switch ACB 2000A which has been chosen for an ACB type ABB E3N 20, 2000A, in a cassette. The switch has a rated current of 3200A and is supplied with a 2000A tripping device from the manufacturer.

Power loss data is available from the manufacturer of the switch. Rated power losses are provided by the manufacturer of the switch at the rated current and also at trip-value currents. See an example in Table AD 8 in Auxiliary Documents. The actual power loss for 2000A is 330W.

Rated current of the circuit shall not exceed 80% of the rated free air current of the switch. The circuit current 2000A divided by the rated current 3200A, i.e. 2000/3200 = 63%, is less than 80% of the rated, which means it is acceptable.

The conductors shall have an area based on 125% of rated current of a free air circuit.

The panel builders have to ensure that the area of the connecting bars will be equal or greater than the area of the main busbars.

The temperature rise depending on power losses are available from enclosure manufacturer. The power losses of 330W shall be compared to the allowed losses in Table AD 7, Auxiliary Documents, which provides a maximum of 443W for an 800mm wide section at temperature rise of 20K with ventilated panels.

De-rated current by temperature. The allowed current for the E3N switch at 55°C is given by the manufacturer at 2000A. See example an in Table AD 9 in Auxiliary Documents.

Short-circuit performance.

The actual switch shall have at least the same attenuation of the short-circuit current as the switch in the reference design. As no switches of current limiting versions were used in the tests for the reference designs, there are no requirements defined for current limiting for the actual switches.

The distances to walls and busbar supports have to be chosen based on the information provided by the switch manufacturers. Once these requirements are fulfilled, the enclosure meets the requirements specified in the standard.

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5.5.3.2. Outgoing sections This example involves one outgoing unit 630/500A which has been provided by an MCCB type ABB Tmax T5:

Power losses. The rated power losses are provided by the manufacturer of the switch at the rated current. The actual power loss is the rated losses multiplied by a factor (Ia/In)² where Ia is the calculated current and In is the rated current. For the 630/500A unit with an MCCB, type ABB T5, the rated power losses are 93W at 630A and the actual losses 93 x (400/630)² = 37W. See the calculation of currents above.

Circuit current.

The circuit current 400A divided by the rated current 630A, 400/630 = 63%, is less than 80% of the rated current. This current is the average current at long time and can be increased up to the trip value 500A.

Area of connectors.

The type of connectors for the switches shall be equivalent to the connectors of the reference design. The requirement for 125% of the free air current is already fulfilled thanks to the fact that the application in a limited subsection also applies for the tested design

Temperature rise due to power losses.

The power losses of 37W shall be compared to the allowed losses in Table AD 7, Auxiliary Documents, which gives a maximum of 56 W for a 300 x 600 sub-section at temperature rise of 20K with ventilated panels.

De-rated current by temperature.

The allowed current for the T5 switch at 55°C is given provided by the manufacturer to at 554A, which is more than the trip value 500A.

Short-circuit performance.

The actual switch shall have at least the same attenuation of the short-circuit current as the switch in the reference design. As no switches of current limiting versions were used in the tests for the reference designs, there are no requirements for current limiting for the actual switches.

The dimensions of sub-sections have to be chosen according to the mounting instructions provided by the switch manufacturers. See an example in Table AD 10 and AD 11 in Auxiliary Documents. Once these requirements are fulfilled, the enclosure meets the requirements specified in the standard.

Identical calculations have to be made for every sub-section.

EPS MANUAL | AUXILIARY DOCUMENTS

Page 1 of 18

NVENT HOFFMAN POWER SYSTEM MANUAL

Auxiliary Documents

The design verification made by Intertek-Semko according to IEC 61439, by KEMA according to IEC 62208 and internal tests give the base for the information given in the tables in this section.

Table AD 1

POWER TRANSFORMERS

Typical values of rated current and short-circuit current 400 V

Transformer power (kVA) Voltage Ucc (%)

Rated current (A) Short-circuit current (kA)

250 4.0 352 8.7

315 4.0 443 10.9

400 4.0 563 13.8

500 4.0 704 17.1

630 4.0 887 21.6

800 4.0 1126 24.1

1000 4.5 1408 27.0

1250 5.0 1760 30.4

1600 6.0 2253 35.5

2000 6.5 2816 40.5

2500 7.0 3520 46.6

3150 7.0 4435 57.6

Table AD 2 Diversity Factor

Values of assumed loading

Type of load Assumed loading factor

Distribution – 2 and 3 circuits 0.9

Distribution – 4 and 5 circuits 0.8

Distribution – 6 to 9 circuits 0.7

Distribution – 10 or more circuits 0.6

Electric actuator 0.2

Motors =< 100 kW 0.8

Motors > 100 kW 1.0


Page 2 of 18

Table AD 3

Rated Current nVent HOFFMAN Busbars

NVENT HOFFMAN

IP 21 vent roof IP 31 vent panels IP 32-55 closed

30 K 50 K 70 K 90 K 30 K 50 K 70 K 90 K 30 K 50 K 70 K 90 K

PLUG-IN 1240 1630 2120 2760 1130 1500 1950 2530 1030 1360 1770 2300

VERTICAL

2//20x10 820 1080 1400 1840 750 990 1290 1680 680 900 1170 1530

2//30x10 1020 1340 1750 2270 940 1230 1610 2080 850 1120 1460 1890

2//40x10 1240 1630 2120 2760 1130 1500 1950 2530 1030 1360 1770 2300

HORIZONTAL

2//10x10 517 679 884 1150 471 625 812 1054 429 566 737 959

2//20x10 861 1132 1473 1917 785 1042 1354 1757 715 944 1229 1598

2//30x10 1033 1358 1767 2300 942 1250 1625 2108 858 1133 1475 1917

2//40x10 1240 1630 2120 2760 1130 1500 1950 2530 1030 1360 1770 2300

2//50x10 1430 1870 2400 3080 1310 1720 2200 2830 1190 1560 2000 2570

2//60x10 1620 2090 2650 3370 1490 1910 2430 3090 1350 1740 2210 2810

2//80x10 1870 2400 3010 3790 1720 2200 2760 3480 1560 2000 2510 3160

2//100x10 2150 2710 3380 4210 1970 2490 3100 3860 1790 2260 2820 3510

2//120x10 2360 2960 3650 4500 2170 2720 3340 4130 1970 2470 3040 3750


Page 3 of 18

Table AD 4

Rated Current Erico Busbars

RATED CURRENT (A)

ERICO IP 21 vent roof IP 31 vent panels IP 32-55 closed

30 K 50 K 70 K 90 K 30 K 50 K 70 K 90 K 30 K 50 K 70 K 90 K

UBS 1/5TN vertical in busbar section 25 x 5 280 370 510 720 260 340 470 660 230 310 430 600 30 x 5 330 430 600 850 300 400 550 780 270 360 500 710 40 x 5 410 550 760 1060 380 500 690 980 340 460 630 890 50 x 5 490 640 910 1270 450 600 830 1160 410 540 760 1060 60 x 5 560 750 1050 1470 520 690 970 1350 470 620 880 1230 80 x 5 710 940 1320 1850 660 860 1210 1690 600 780 1100 1540

UBS 2/5TN horizontal in MCU or top-bottom of enclosure 2//25x5 500 660 860 1110 460 600 790 1020 420 550 710 920 2//30x5 590 770 1010 1300 540 710 920 1200 490 640 840 1090 2//40x5 870 1140 1480 1930 790 1050 1370 1770 720 950 1240 1610 2//50x5 1040 1380 1790 2320 950 1260 1640 2140 860 1150 1490 1940 2//60x5 1160 1540 2000 2600 1060 1410 1830 2380 970 1280 1670 2160 2//80x5 1390 1850 2400 3120 1280 1690 2210 2860 1160 1540 2000 2600

UBS 1/10TN vertical in busbar section 25 x 10 400 530 730 1030 370 490 670 940 330 440 610 860 30 x 10 470 620 860 1210 430 570 790 1110 390 520 720 1010 40 x 10 590 780 1080 1520 540 720 990 1400 490 650 900 1270 50 x 10 700 920 1300 1810 640 850 1190 1660 580 770 1080 1510 60 x 10 800 1070 1500 2100 740 980 1380 1930 670 890 1250 1750 80 x 10 1020 1340 1880 2640 940 1230 1730 2420 850 1120 1570 2200

UBS 2/10TN horizontal in EPS or top-bottom of enclosure 2//30x10 942 1250 1625 2108 858 1133 1475 1917 700 920 1200 1550 2//40x10 1130 1500 1950 2530 1030 1360 1770 2300 1030 1360 1770 2300 2//50x10 1310 1720 2200 2830 1190 1560 2000 2570 1230 1640 2130 2770 2//60x10 1490 1910 2430 3090 1350 1740 2210 2810 1380 1830 2380 3090 2//80x10 1720 2200 2760 3480 1560 2000 2510 3160 1660 2200 2860 3720 2//100x10 1970 2490 3100 3860 1790 2260 2820 3510 1920 2540 3310 4300 2//120x10 2170 2720 3340 4130 1970 2470 3040 3750 2100 2790 3640 4730

UBS 3/10TN horizontal in EPS or top-bottom of enclosure 3//30x10 1287 1709 2223 2883 1195 1578 2054 2670 3//40x10 1554 2052 2667 3462 1437 1895 2467 3206 3//50x10 1853 2430 3109 3999 1708 2245 2878 3698 3//60x10 2096 2680 3409 4336 1927 2493 3167 4027 3//80x10 2375 3042 3816 4811 2201 2816 3534 4450 3//100x10 2716 3434 4276 5324 2515 3180 3968 4938 3//120x10 2978 3721 4569 5649 2759 3442 4236 5225


Page 4 of 18

Table AD 5

Short-circuit Withstand

nVent HOFFMAN Busbars

SHORT-CIRCUIT WITHSTAND [N]

NVENT HOFFMAN

C = 200 mm C = 300 mm C = 400 mm C = 500 mm C = 600 mm C = 800 mm

Peak kA

RMS kA 1s

RMS kA 3s

Peak kA

RMS kA 1s

RMS kA 3s

Peak kA

RMS kA 1s

RMS kA 3s

Peak kA

RMS kA 1s

RMS kA 3s

Peak kA

RMS kA 1s

RMS kA 3s

Peak kA

RMS kA 1s

RMS kA 3s

PLUG-IN Two supports

74 35 35 74 35 35 63 30 30 59 28 27 53 25 25 46 22 21 105 50 35 105 50 35 90 43 30 82 39 27 74 35 25 65 31 21

FIXED 400 * Two supports

74 35 35 48 23 25 44 21 22 38 18 19 34 16 18 30 15 15 105 50 35 69 33 35 61 29 30 55 26 27 50 23 24 44 21 21

FIXED 600 * Two supports

74 35 35 74 35 35 63 30 30 59 28 28 53 25 25 46 22 22 105 50 35 105 50 35 90 43 35 82 39 35 74 35 35 65 31 31

HORIZONTAL

2//10x10 42 20 10 34 16 10 42 13 10 21 10 10 2//20x10 63 30 15 50 24 15 42 20 15 32 15 15 2//30x10 132 60 19 111 53 19 97 44 19 69 33 19 2//40x10 132 60 21 122 58 21 105 48 21 76 36 21 2//50x10 132 60 23 132 60 23 123 52 23 82 39 23 2//60x10 132 60 24 132 60 24 123 56 24 88 42 24 2//80x10 132 60 28 132 60 28 132 60 28 101 48 28

2//100x10 132 60 33 132 60 33 132 60 33 125 57 33 2//120x10 132 60 35 132 60 35 132 60 35 132 60 35

* Two supports the min. busbar 40x10


Page 5 of 18

Table AD 6

Short-circuit Withstand Erico Busbars

Maximum distance between supports (mm)

Ipk (kA) 24 48 63 82 114 145 152 165 187 209 231 Icc (kA) 12 23 30 39 52 66 69 75 85 95 105 30 10 1000 672 515 396 283 223 214 196 173 155 140 40 10 1000 780 598 460 329 259 248 228 201 180 163

1 bar per

phase

50 10 1000 877 672 517 370 291 279 256 226 202 178 60 10 1000 967 741 546 408 321 307 283 249 221 180 80 10 1000 1000 869 549 478 377 360 332 284 228 186

100 10 1000 1000 989 569 504 429 410 367 295 236 193 120 10 1000 1000 1000 592 506 446 420 377 306 245 200 30 10 1000 571 438 337 241 190 181 167 147 132 119 40 10 1000 685 525 404 289 227 218 200 176 158 143

2 bars per

phase

50 10 1000 792 607 467 334 263 252 232 204 183 165 60 10 1000 896 687 528 378 298 285 262 231 207 187 80 10 1000 1000 838 644 461 363 347 320 282 252 219

100 10 1000 1000 982 755 513 426 407 375 331 278 228 120 10 1000 1000 1000 863 516 487 465 420 357 289 237 30 10 1000 685 525 404 289 228 218 200 177 158 143 40 10 1000 816 625 481 344 271 259 238 210 188 170

3 bars per

phase

50 10 1000 939 720 554 396 312 298 275 242 217 196 60 10 1000 1000 811 615 446 351 336 309 273 244 208 80 10 1000 1000 984 637 510 427 408 375 330 264 216

100 10 1000 1000 1000 662 512 481 453 406 343 274 224 120 10 1000 1000 1000 1000 515 491 466 417 354 286 234


Page 6 of 18

Table AD 7

Allowed dissipation in sub-sections

ALLOWED DISSIPATION (W) IN SUB-SECTIONS - Form 4

Height

Width

IP 20-21 vent roof IP 20-31 vent panels IP 32-55 closed Extra at one free side

20 K 30 K 40 K 20 K 30 K 40 K 20 K 30 K 40 K 20 K 30 K 40 K 100 400 17 23 30 14 19 25 11 15 20 11 15 20 150 400 23 35 45 19 29 38 15 23 30 15 23 30 200 400 30 45 59 25 38 49 20 30 39 20 30 39 250 400 39 57 75 33 48 63 26 38 50 26 38 50 300 400 45 68 90 38 56 75 30 45 60 30 45 60 400 400 59 90 120 49 75 100 39 60 80 39 60 80 100 600 23 35 45 19 29 38 15 23 30 11 15 20 150 600 35 50 68 29 41 56 23 33 45 15 23 30 200 600 45 68 90 38 56 75 30 45 60 20 30 39 250 600 57 84 113 48 70 94 38 56 75 26 38 50 300 600 68 102 134 56 85 111 45 68 89 30 45 60 400 600 90 134 179 75 111 149 60 89 119 39 60 80 500 600 113 167 224 94 139 186 75 111 149 50 75 99 600 600 134 201 269 111 168 224 89 134 179 60 89 119 100 800 30 45 59 25 38 49 20 30 39 11 15 20 150 800 45 68 90 38 56 75 30 45 60 15 23 30 200 800 59 90 120 49 75 100 39 60 80 20 30 39 250 800 75 113 149 63 94 124 50 75 99 26 38 50 300 800 90 134 179 75 111 149 60 89 119 30 45 60 400 800 120 179 239 100 149 199 80 119 159 39 60 80 500 800 149 224 297 124 186 248 99 149 198 50 75 99 600 800 179 269 356 149 224 296 119 179 237 60 89 119 800 800 239 356 476 199 296 396 159 237 317 80 119 159

1800 400 239 360 477 199 300 398 159 240 318 179 267 357 1800 600 360 539 719 300 449 599 240 359 479 179 267 357 1800 800 477 719 957 398 599 798 318 479 638 179 267 357 1800 1000 596 899 1196 498 749 998 398 599 798 179 267 357 1800 1200 715 1079 1435 598 899 1198 478 719 958 179 267 357 2000 400 266 399 531 221 333 443 177 266 354 198 297 396 2000 600 399 597 797 333 498 664 266 398 531 198 297 396 2000 800 531 797 1062 443 664 885 354 531 708 198 297 396 2000 1000 664 996 1328 554 830 1106 443 664 885 198 297 396 2000 1200 797 1195 1594 665 996 1327 532 797 1062 198 297 396 2200 400 293 437 585 244 364 488 195 291 390 218 327 435 2200 600 437 657 876 364 548 730 291 438 584 218 327 435 2200 800 585 876 1169 488 730 974 390 584 779 218 327 435 2200 1000 731 1095 1461 610 913 1218 488 730 974 218 327 435 2200 1200 877 1314 1753 732 1096 1462 586 876 1169 218 327 435


Page 7 of 18

Table AD 8

Example for power losses for switches

Total power losses

Circuit breaker Size [A]

Fixed poles 3/4 poles [W]

Withdrawable 3/4 poles [W]

800 65 95

E1 B-N 1000 96 147.2 1250 150 230

1600 253 378 800 29 53 1000 44.8 83.2

E2 B-N-S 1250 70 130 1600 115 215 2000 180 330

E2 L 1250 105 165 1600 170 265

800 22 36 1000 38.4 57.6 1250 60 90

E3 N-S-H-V 1600 85 150 2000 130 225 2500 205 350 3200 330 570

E3 L 2000 215 330 2500 335 515

E4 S-H-V 3200 235 425 4000 360 660

3200 170 290

E6 H-V 4000 265 445 5000 415 700

6300 650 1100

The IEC 439-1 and CEI EN 60439-1 standards prescribe calculations for determining the heat dissipation of ANS type switchgear (non-standard), for which the following must be taken into consideration:

- The overall dimensions - The rated current of the busbars and connections and the relative dissipation - The dissipated power of the apparatus mounted in the switchgear

For this point, the table beside provides information on the circuit-breakers. For other apparatus, please consult the catalogues of the relative manufacturers.


Page 8 of 18

Table AD9

Example for temperature derating for switches ACB and MCCB.

Withdrawable SACE Emax E3

Temperature [°C]

E3 800 E3 1000 E3 1250 E3 1600 E3 2000 E3 2500 E3 3200 % [A] % [A] % [A] % [A] % [A] % [A] % [A]

10 100 800 100 1000 100 1250 100 1600 100 2000 100 2500 100 3200 20 100 800 100 1000 100 1250 100 1600 100 2000 100 2500 100 3200 30 100 800 100 1000 100 1250 100 1600 100 2000 100 2500 100 3200 40 100 800 100 1000 100 1250 100 1600 100 2000 100 2500 100 3200 45 100 800 100 1000 100 1250 100 1600 100 2000 100 2500 100 3200 50 100 800 100 1000 100 1250 100 1600 100 2000 100 2500 97 3090 55 100 800 100 1000 100 1250 100 1600 100 2000 100 2500 93 2975 60 100 800 100 1000 100 1250 100 1600 100 2000 100 2500 89 2860 65 100 800 100 1000 100 1250 100 1600 100 2000 97 2425 86 2745 70 100 800 100 1000 100 1250 100 1600 100 2000 94 2350 82 2630

Fixed T5 630 and T5D 630 up to 40°C 50°C 60°C 70°C

lmax [A] I1 lmax [A] I1 lmax [A] I1 lmax [A] I1

FC 630 1 580 0.92 529 0.84 479 0.76 F 630 1 580 0.92 529 0.84 479 0.76

R (HR) 630 1 580 0.92 529 0.84 479 0.76 R (VR) 630 1 605 0.96 554 0.88 504 0.80

FC = Front cables terminals F = Front flat terminals R (HR) = Rear terminals (horizontal) R (VR) = Rear terminals (vertical)


Page 9 of 18

TableAD 10

Example for back-up protection for MCCB - MCB

Upstream T1 T1 T1 T2 T3 T4 T2 T3 T4 T2 T4 T2 T4 T4 Characteristic Version B C N S H L L V

Downstream

B, C, K, Z

In [A] I [kA] 16 25 36 50 70 85 120 200

S200

S200M

S200P

S280

S800N

S800S

0.5..10 10

36 40 16 25 30 36 36 36 40 40 40 40 40 40

16 16 36 40 70 85

16 25 30 36 36 50 40 40 40 40 25 25 60 60

30 36 36 36 50 40 40 70 40 85 40 40

30 36 30 36 50 30 40 60 50 60 40 40

16 25 30 36 25 36 50 25 40 60 40 60 40 40

16 16 16 36 16 30 36 16 30 36 30 36 30 30 70 70 85 85 120 200

70 70 85 85 120 200

13..63

B, C 0.5..10

15 13..63

B, C, D,

K, Z

0.5..10 25

13..25

32..63 15 B, C 80, 100 6

B, C, D 10..125 36 B, C, D, K 10..125 50

Table AD 11

Example for insulation distances and connection for switches

The circuit-breakers can be connected to the main power system using the most common configurations and dimensions of copper bars. Installation of live parts must ensure:

- Minimum insulation distances between the phases

Rated insulation voltage Ui Minimum distance

[mm] 1000V 14mm according to IEC 61439; ABB suggests 25mm

- Insulation distance of installation cubicle

Fixed circuit-breakers Withdrawable circuit-breakers

[mm] A 3P

B 4P

C D [mm] A 3P

B 4P

C D

E1.2 250 322 382.5* 130 E1.2 280 350 440* 252 E2.2 400 490 500 221 E2.2 400 490 500 355 E4.2 500 600 500 221 E4.2 500 600 500 355 E6.2 900 1000 500 221 E6.2 900 1000 500 355 E6.2/f - 1200 500 221 E6.2/f - 1200 500 355

* 332.5mm for voltage less ≤ 440V AC * 390mm for voltage less ≤ 440V AC


Page 10 of 18

Table AD 12

Example for torques at connection for switches

- Tightening torques

The following table indicates the values required for connecting the circuit-breaker terminal and the connecting bars.

Terminals

E1.2

E2.2 / E4.2 / E6.2

Modifiable HR/VR rear 40 Nm 70 Nm

Spread rear 40 Nm 70 Nm

Front 40 Nm 70 Nm

Extended front 40 Nm 70 Nm

Spread front 70 Nm 70 Nm

Front for cables 43 Nm 70 Nm


Page 11 of 18

Table AD 13

Max long time current for switches related to sizes of sub-sections

CIRCUIT-BREAKERS MCCB Type ABB Tmax

Ambient air temperature 35°C, Temperature rise 20K, Max temp 55°C. Current ratings below are average values during 4 to 5 hours. Short time currents are allowed up to rated values for the switches.

FIXED CONNECTION PLUG-IN SOCKET SUBSECTION SIZE

Type Rated current, In IP21 IP31 IP54 IP21 IP31 IP54 Width

(mm) Height (mm)

XT1 25A 25 25 25 25 25 25 400 150 XT1 32A 32 32 32 32 32 32 400 150 XT1 40A 40 40 40 40 40 40 400 150 XT1 50A 50 50 50 50 50 50 400 150 XT1 63A 63 63 63 63 63 58 400 150 XT1 80A 80 80 80 80 74 66 400 150 XT1 100A 100 95 85 88 80 71 400 150 XT1 125A 106 96 86 90 82 73 400 150 XT1 160A 114 104 92 99 90 80 400 150 XT1 25A 25 25 25 25 25 25 600 150 XT1 32A 32 32 32 32 32 32 600 150 XT1 40A 40 40 40 40 40 40 600 150 XT1 50A 50 50 50 50 50 50 600 150 XT1 63A 63 63 63 63 63 63 600 150 XT1 80A 80 80 80 80 80 80 600 150 XT1 100A 100 100 100 100 98 88 600 150 XT1 125A 125 119 106 111 101 90 600 150 XT1 160A 128 128 114 122 111 99 600 150 XT2 25A 25 25 25 25 25 25 400 150 XT2 32A 32 32 32 32 32 32 400 150 XT2 40A 40 40 40 40 40 40 400 150 XT2 50A 50 50 50 50 50 50 400 150 XT2 63A 63 63 63 63 63 59 400 150 XT2 80A 80 80 75 80 78 69 400 150 XT2 100A 90 89 79 89 81 72 400 150 XT2 125A 103 93 83 93 84 75 400 150 XT2 160A 110 100 89 102 92 82 400 150 XT2 25A 25 25 25 25 25 25 600 150 XT2 32A 32 32 32 32 32 32 600 150 XT2 40A 40 40 40 40 40 40 600 150 XT2 50A 50 50 50 50 50 50 600 150 XT2 63A 63 63 63 63 63 63 600 150 XT2 80A 80 80 80 80 80 80 600 150 XT2 100A 100 100 98 100 100 89 600 150 XT2 125A 125 115 103 113 104 93 600 150 XT2 160A 128 123 110 125 114 102 600 150 XT3 63A 63 63 63 63 63 63 400 150 XT3 80A 80 80 80 80 80 75 400 150 XT3 100A 100 100 94 100 97 87 400 150 XT3 125A 125 122 108 112 111 99 400 150


Page 12 of 18

XT3

160A

128

128

126

128

128

115

400

150

XT3 63A 63 63 63 63 63 63 600 150 XT3 80A 80 80 80 80 80 80 600 150 XT3 100A 100 100 100 100 100 100 600 150 XT3 125A 125 125 125 125 125 122 600 150 XT3 160A 128 128 128 128 128 128 600 150

XT4 25A 25 25 25 25 25 25 400 150 XT4 32A 32 32 32 32 32 32 400 150 XT4 40A 40 40 40 40 40 40 400 150 XT4 50A 50 50 50 50 50 50 400 150 XT4 63A 63 63 61 63 63 59 400 150 XT4 80A 80 80 75 80 80 73 400 150 XT4 100A 100 100 89 100 95 85 400 150 XT4 125A 125 116 103 110 107 95 400 150 XT4 160A 144 134 119 136 123 110 400 150

XT4 25A 25 25 25 25 25 25 600 150 XT4 32A 32 32 32 32 32 32 600 150 XT4 40A 40 40 40 40 40 40 600 150 XT4 50A 50 50 50 50 50 50 600 150 XT4 63A 63 63 63 63 63 63 600 150 XT4 80A 80 80 80 80 80 80 600 150 XT4 100A 100 100 100 100 100 100 600 150 XT4 125A 125 125 125 125 125 118 600 150 XT4 160A 160 160 148 160 152 136 600 150 XT4 200A 200 200 183 200 184 163 600 200 XT4 250A 200 200 196 200 194 173 600 200 XT4 250A 200 200 200 200 200 200 600 250

T5 320A 320 320 308 320 320 308 600 250 T5 400A 320 320 320 320 320 320 600 250

T6 630A 542 492 441 542 492 441 600 300 T6 800A 705 705 643 705 705 643 600 400 T6 800A 800 800 718 705 705 705 600 500 T6 1000A 775 707 632 600 400 T6 1000A 800 792 707 600 500

T7

1000A

1000

913

816

957

913

816

600

400 T7 1000A 1000 1000 913 957 957 913 600 500 T7 1250A 1119 1021 912 1119 1021 912 600 500 T7 1600A 1119 1021 912 1119 1021 912 600 500 T7 1000A 1000 913 816 957 913 816 600 400


Page 13 of 18

CIRCUIT-BREAKERS ACB Type ABB Emax

Ambient air temperature 35°C, Temperature rise 20K, Max temp 55°C. Current ratings below are average values during 4 to 5 hours.

Short time currents are allowed up to rated values for the switches.

Fixed connection Draw-out cassette Sub-section size

Type Rated current In IP21 IP31 IP54 IP21 IP31 IP54 Width

(mm) Height (mm)

X1N 06 630A 630 630 630 630 630 630 400 600 X1N 08 800A 800 800 800 744 679 608 400 600 X1N 10 1000A 1000 974 871 745 680 609 400 600

X1N 08 800A 800 800 800 800 675 632 600 500 X1N 10 1000A 1000 1000 974 835 762 680 600 500 X1N 12 1250A 1193 1088 972 835 762 681 600 500 X1N 16 1600A 1194 1089 973 835 761 680 600 500 E1N 08

800A

800

800

800

800

800

774

600

600

E1N 10 1000A 1000 1000 963 955 869 778 600 600 E1N 12 1250A 1181 1075 963 954 868 778 600 600 E1N 16 1600A 1164 1060 949 953 867 776 600 600 E2N 10 1000A 1000 1000 1000 1000 1000 1000 600 600 E2N 12 1250A 1250 1250 1250 1250 1155 1034 600 600 E2N 16 1600A 1600 1572 1408 1263 1150 1029 600 600 E2N 20 2000A 1600 1571 1406 1274 1160 1039 600 600 E3N 20 2000A 2000 2000 1914 1784 1628 1454 800 600 E3N 25 2500A 2336 2131 1905 1788 1631 1458 800 600 E3N 32 3200A 2357 2150 1922 1793 1636 1462 800 600 E4S 40 4000A 3200 2974 2658 2407 2196 1963 1000 600 E6H 50 5000A 3794 3462 3095 2922 2666 2383 1000 600

E1N 08 800A 800 800 800 800 800 800 600 2200 E1N 10 1000A 1000 1000 1000 1000 1000 1000 600 2200 E1N 12 1250A 1250 1250 1250 1250 1250 1250 600 2200 E1N 16 1600A 1280 1280 1280 1280 1280 1280 600 2200 E2N 10 1000A 1000 1000 1000 1000 1000 1000 600 2200 E2N 12 1250A 1250 1250 1250 1250 1250 1250 600 2200 E2N 16 1600A 1600 1600 1600 1600 1600 1600 600 2200 E2N 20 2000A 1600 1600 1600 1600 1600 1600 600 2200 E3N 20 2000A 2000 2000 2000 2000 2000 2000 800 2200 E3N 25 2500A 2500 2500 2500 2500 2500 2500 800 2200 E3N 32 3200A 2560 2560 2560 2560 2560 2560 800 2200 E4S 40 4000A 3200 3200 3200 3200 3200 3200 1000 2200 E6H 50 5000A 5000 5000 5000 5000 4668 4175 1000 2200


Page 14 of 18

CIRCUIT-BREAKERS ACB Type ABB Emax2

Ambient air temperature 35°C, Temperature rise 20K, Max temp 55°C. Current ratings below are average values during 4 to 5 hours.

Short time currents are allowed up to rated values for the switches.

Fixed connection Draw-out cassette Sub-section size

Type Rated current In IP21 IP31 IP54 IP21 IP31 IP54 Width

(mm) Height (mm)

E1.2 630

630A

630

630

630

630

630

620

400

600

E1.2 800 800A 800 800 800 759 693 620 400 600 E1.2 1000 1000A 800 800 800 760 693 620 400 600

E1.2 800

800A

800

800

800

800

776

693

600

500

E1.2 1000 1000A 1000 1000 981 851 776 693 600 500 E1.2 1250 1250A 1203 1097 980 851 776 693 600 500 E1.2 1600 1600A 1200 1094 977 850 776 693 600 500

E2.2 800 800A 800 800 800 800 800 800 600 600 E2.2 1000 1000A 1000 1000 1000 1000 991 887 600 600 E2.2 1250 1250A 1250 1250 1250 1091 993 889 600 600 E2.2 1600 1600A 1588 1445 1294 1091 993 889 600 600 E2.2 2000 2000A 1838 1677 1498 1261 1151 1028 800 600 E2.2 2500 2500A 2000 1868 1669 1426 1301 1163 800 600 E4.2 3200 3200A 2077 1895 1693 1571 1433 1281 800 600 E4.2 4000 4000A 2482 2264 2024 1784 1628 1454 800 600

E1.2 800 800A 800 800 800 800 800 800 600 2200 E1.2 1000 1000A 1000 1000 1000 1000 1000 1000 600 2200 E1.2 1250 1250A 1250 1250 1250 1250 1250 1250 600 2200 E1.2 1600 1600A 1280 1280 1280 1280 1280 1280 600 2200

E2.2 800

800A

800

800

800

800

800

800

600

2200

E2.2 1000 1000A 1000 1000 1000 1000 1000 1000 600 2200 E2.2 1250 1250A 1250 1250 1250 1250 1250 1250 600 2200 E2.2 1600 1600A 1600 1600 1600 1600 1600 1600 600 2200 E2.2 2000 2000A 2000 2000 2000 2000 2000 1862 800 2200 E2.2 2500 2500A 2000 2000 2000 2000 2000 2000 800 2200

E4.2 3200

3200A

3200

3200

3065

2839

2593

2318

800

2200

E4.2 4000 4000A 3200 3200 3200 3200 2945 2633 800 2200

E6.2 4000 4000A 4000 4000 4000 4000 4000 3789 1000 2200 E6.2 5000 5000A 5000 5000 5000 4637 4236 3789 1000 2200 E6.2 6300 6300A 5040 5040 5025 4636 4235 3788 1000 2200


Page 15 of 18

Switch-fuse combination ABB type OS


Fixed connection Sub-section size

Type Rated current In IP21 IP31 IP54 Width (mm)

Height (mm)

OS160 50

50A

50

50

50

400

150

OS160 63 63A 63 63 63 400 150 OS160 80 80A 80 80 80 400 150

OS160 100 100A 100 96 85 400 150 OS160 125 125A 102 92 82 400 150 OS160 160 160A 111 101 90 400 150

OS160 50

50A

50

50

50

600

150

OS160 63 63A 63 63 63 600 150 OS160 80 80A 80 80 80 600 150

OS160 100 100A 100 100 100 600 150 OS160 125 125A 125 114 102 600 150 OS160 160 160A 128 125 111 600 150

OS250 100 100A 100 100 100 600 200 OS250 125 125A 125 125 125 600 200 OS250 160 160A 160 160 157 600 200 OS250 200 200A 190 175 155 600 200 OS250 225 225A 187 172 153 600 200 OS250 250 250A 191 175 156 600 200

OS400 320 320A 250 230 204 600 250 OS400 320 355A 238 219 194 600 250 OS400 400 400A 245 225 200 600 250

OS630 500 500A 369 336 301 600 400 OS630 630 630A 384 351 314 600 400


Page 16 of 18

CIRCUIT-BREAKERS MCCB Type Schneider Compact


Fixed connection Plug-in socket Sub-section size

Type Rated current In IP21 IP31 IP54 IP21 IP31 IP54 Width Height

NSX100 25A 25 25 25 25 25 25 400 150 NSX100 32A 32 32 32 32 32 32 400 150 NSX100 40A 40 40 38 40 40 38 400 150 NSX100 50A 50 50 50 50 50 50 400 150 NSX100 63A 58 54 48 58 53 47 400 150

NSX100 80A 74 68 61 73 66 59 400 150 NSX100 100A 80 80 76 80 80 72 400 150

NSX100 25A 25 25 25 25 25 25 600 150 NSX100 32A 32 32 32 32 32 32 600 150 NSX100 40A 40 40 40 40 40 40 600 150 NSX100 50A 50 50 50 50 50 50 600 150 NSX100 63A 63 63 59 63 63 58 600 150 NSX100 80A 80 80 75 80 80 73 600 150 NSX100 100A 80 80 80 80 80 80 600 150

NSX160 63A 63 63 63 63 63 63 400 150 NSX160 80A 74 71 63 74 67 60 400 150 NSX160 100A 100 91 81 91 82 73 400 150 NSX160 160A 118 108 96 109 99 88 400 150

NSX160 63A 63 63 63 63 63 63 600 150 NSX160 80A 80 80 78 80 80 74 600 150 NSX160 100A 100 100 100 100 100 91 600 150 NSX160 160A 128 128 118 128 122 109 600 150

NSX250 160A 160 146 130 144 131 117 600 150 NSX250 200A 174 159 141 155 141 126 600 150 NSX250 250A 198 180 160 171 155 138 600 150

NSX250 160A 160 160 148 160 150 134 600 200 NSX250 200A 185 182 162 176 162 144 600 200 NSX250 250A 200 200 183 194 178 158 600 200

NSX400 320A 320 320 320 320 299 266 600 250 NSX400 400A 320 320 320 320 299 266 600 250

NSX400 320A 320 320 320 320 320 289 600 300 NSX400 400A 320 320 320 320 320 289 600 300

NSX630 400A 381 346 310 301 273 245 600 300

NSX630 630A 476 432 387 389 353 317 600 300


Page 17 of 18

CIRCUIT-BREAKERS ACB Type Schneider Masterpact


Fixed connection Plug-in socket Sub-section size

Type Rated current In IP21 IP31 IP54 IP21 IP31 IP54 Width Height

NT08 800A 800 800 800 800 800 796 600 600 NT10 1000A 1000 1000 1000 945 860 770 600 600 NT12 1250A 1250 1155 1034 915 833 746 600 600 NT16 1600A 1249 1137 1018 864 786 704 600 600

NW08 800A 800 800 800 800 800 755 600 600 NW10 1000A 1000 1000 1000 945 860 770 600 600 NW12 1250A 1250 1250 1179 954 868 778 600 600 NW16 1600A 1421 1293 1158 938 854 764 600 600 NW20 2000A 1464 1333 1193 1068 972 870 600 600 NW25 2500A 2115 1930 1725 1365 1246 1113 800 600 NW32 3200A 2089 1906 1703 1654 1509 1349 800 600 NW40 4000A 2426 2213 1978 2061 1881 1681 1000 600

NW25 2500A 2444 2230 1994 1578 1440 1287 800 800 NW32 3200A 2414 2203 1969 1911 1744 1559 800 800 NW40 4000A 2802 2559 2284 2381 2175 1941 1000 800

NT08 800A 800 800 800 800 800 800 600 2200 NT10 1000A 1000 1000 1000 1000 1000 1000 600 2200 NT12 1250A 1250 1250 1250 1250 1250 1250 600 2200 NT16 1600A 1280 1280 1280 1280 1280 1273 600 2200

NW08 800A 800 800 800 800 800 800 600 2200 NW10 1000A 1000 1000 1000 1000 1000 1000 600 2200 NW12 1250A 1250 1250 1250 1250 1250 1250 600 2200 NW16 1600A 1600 1600 1600 1600 1546 1382 600 2200 NW20 2000A 2000 2000 2000 1929 1760 1574 600 2200 NW25 2500A 2500 2500 2500 2469 2255 2016 800 2200

NW32 3200A 3200 3200 3084 2990 2731 2441 800 2200 NW40 4000A 3200 3200 3098 3200 2945 2633 1000 2200