cpg.1 sf insulated medium voltage modular gis cubicles up to 38 kv ... · sf6i insulated medium...

CPG.1

SF6I INSULATED MEDIUM VOLTAGE MODULAR GIS CUBICLES UP TO 38 kV

ACCORDING TO IEEE STANDARDS

General Instructions

LIB

2012.05.14

Primary Distribution Switchgear

Secondary Distribution Switchgear

Protection and Automation

Distribution Transformers

IG-197

version US 01

Transformer Substations

Low Voltage Boards

Legal Deposit: BI-0922/2012

CAUTION!

When MV equipment is operating, certain components are live, other parts may be in movement and some may reach high temperatures. Therefore, the use of this equipment poses electrical, mechanical and thermal risks. In order to ensure an acceptable level of protection for people and property, and in compliance with applicable environmental recommendations, Ormazabal designs and manufactures its products according to the principle of integrated safety, based on the following criteria:

Elimination of hazards wherever possible.

Where elimination of hazards is neither technically nor economically feasible, appropriate protection functions are incorporated in the equipment.

Communication about remaining risks to facilitate the design of operating procedures which prevent such risks, training for the personnel in charge of the equipment, and the use of suitable personal protection equipment.

Use of recyclable materials and establishment of procedures for the disposal of equipment and components so that once the end of their useful lives is reached, they are duly processed in accordance, as far as possible, with the environmental restrictions established by the competent authorities.

Consequently, the equipment to which the present manual refers complies with the requirements of section 11.2 of the forthcoming IEC standard 62271-1. It must therefore only be operated by appropriately qualified and supervised personnel, in accordance with the requirements of standard EN 50110-1 on the safety of electrical installations and standard EN 50110-2 on activities in or near electrical installations. Personnel must be fully familiar with the instructions and warnings contained in this manual and in other recommendations of a more general nature which are applicable to the situation according to current legislation. The above must be carefully observed, as the correct and safe operation of this equipment depends not only on its design but also on general circumstances which are in general beyond the control and responsibility of the manufacturer. More specifically: The equipment must be handled and transported appropriately from the factory to the place of installation.

All intermediate storage should occur in conditions which do not alter or damage the characteristics of the equipment or its essential components.

Service conditions must be compatible with the equipment rating.

The equipment must be operated strictly in accordance with the instructions given in the manual, and the applicable operating and safety principles must be clearly understood.

Maintenance should be performed properly, taking into account the actual service and environmental conditions in the place of installation.

The manufacturer declines all liability for any significant indirect damages resulting from violation of the guarantee, under any jurisdiction, including loss of income, stoppages and costs resulting from repair or replacement of parts. Guarantee

The manufacturer guarantees this product against any defect in materials and operation during the contractual period. In the event that defects are detected, the manufacturer may opt either to repair or replace the equipment. Improper handling of this equipment and its repair by the user shall constitute a violation of the guarantee. Registered Trademarks and Copyrights

All registered trademarks cited in this document are the property of their respective owners. The intellectual property of this manual belongs to the manufacturer. In view of the constant evolution in standards and design, the characteristics of the elements contained in this manual are subject to change without prior notification. These characteristics, as well as the availability of components, are subject to confirmation by Ormazabal’s Technical - Commercial Department.

40

GENERAL INSTRUCTIONS FOR CPG.1

SF6 INSULATED MEDIUM VOLTAGE MODULAR GIS CUBICLES UP TO 38 kV


IG-197 version US 01

2012.05.14

of 40

CONTENTS

1. DESCRIPTION AND MAIN CHARACTERISTICS ...................................................... 4

1.1. CUBICLE ELEMENTS ................................................................................................. 5

1.2. GENERAL SERVICE CONDITIONS ......................................................................... 14

1.3. MECHANICAL CHARACTERISTICS ........................................................................ 15

1.4. MAIN ELECTRICAL CHARACTERISTICS ............................................................... 20

2. TRANSPORT ............................................................................................................. 21

2.1. LIFTING METHODS .................................................................................................. 21

3. STORAGE ................................................................................................................. 22

4. INSTALLATION ......................................................................................................... 23

4.1. CIVIL ENGINEERING WORKS ................................................................................. 23

5. SEQUENCE OF OPERATIONS ................................................................................ 25

5.1. CPG.1-V1 CUBICLE .................................................................................................. 25

5.2. CPG.1-S1 CUBICLE .................................................................................................. 26

5.3. CPG.1-C TYPE C CUBICLE ...................................................................................... 27

5.4. CPG.1-C TYPE M CUBICLE ..................................................................................... 29

5.5. CPG.1-F1 CUBICLE .................................................................................................. 31

5.6. INTERLOCKS IN CPG.1 ........................................................................................... 35

6. MAINTENANCE ........................................................................................................ 36

6.1. MECHANICAL MAINTENANCE ............................................................................... 36

6.2. VOLTAGE PRESENCE-ABSENCE INDICATOR MAINTENANCE .......................... 38

7. ADDITIONAL INFORMATION .................................................................................. 39

7.1. SPARES .................................................................................................................... 39

7.2. CUBICLES EQUIPPED WITH VIDEO MONITOR FOR VISUAL CONFIRMATION OF THE SWITCH POSITION ................................................................................................... 39

of 40





2012.05.14

1. DESCRIPTION AND MAIN CHARACTERISTICS The CPG system is a range of fully SF6 insulated modular cubicles (GIS-type) for single busbar primary distribution applications, in Medium Voltage grids up to 38 kV, designed to fulfill the requirements of standards:

Standard Description CAN CSA C22.2 Switchgear assemblies

IEEE C37.74 IEEE Standard Requirements for Subsurface, Vault, and Pad-Mounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems Up to 38 kV

IEEE C37.20.3 IEEE Standard for Metal-Enclosed Interrupter Switchgear

IEEE 1247 IEEE Standard for Interrupter Switches for Alternating Current, Rated Above 1000 Volts

IEEE C37.123 IEEE Guide to Specifications for Gas-Insulated, Electric Power Substation Equipment

IEEE Std C37.20.4 IEEE Standard for Indoor AC Switches (1 kV-38 kV) for Use in Metal-Enclosed Switchgear

IEEE C37.04 IEEE Standard Rating Structure for AC High-Voltage Circuit Breakers

IEEE C37.06 AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis- Preferred Ratings and Related Required Capabilities

IEEE Std C37.09 IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis

IEEE Std C37.20.7 IEEE Guide for Testing Medium-Voltage Metal-Enclosed Switchgear for Internal Arcing Faults

IEC 60529 Degrees of protection provided by enclosures.

IEC 61243-5 Voltage presence detecting systems (VDS).

The CPG.1 range of cubicles comprises the following functional units:

FUNCTION DESIGNATION

Circuit-breaker cubicle CPG.1-V1

Main Transformer Protection Feeder Protection Capacitor Bank Protection Auxiliary Services Transformer Protection Longitudinal coupling with MV cables

Disconnector Cubicle CPG.1-S1

Busbar voltage metering with VT disconnection Capacitor bank operation Longitudinal busbar coupling with MV cables

Longitudinal Busbar Coupling Cubicle CPG.1-C

Longitudinal busbar coupling

Fused Protection Cubicle CPG.1-F1

Auxiliary Services Transformer Protection

40





2012.05.14

of 40

1.1. CUBICLE ELEMENTS

1.1.1. Main Elements

The cubicle is made up of a series of independent compartments:

1 Switch and disconnector compartments 4 Gas pressure relief duct (optional) 2 Busbar (busbar compartment) 5 Control compartment 3 Cable compartment 6 Operation panel

Figure 1.1: Main elements of CPG.1 cubicles

1

2

4

3

6

5

of 40





2012.05.14

Switch and disconnector compartments: These are the compartments which house the switching and breaking switchgear, where the insulating medium is SF6 gas. There are up to 3 compartments:

One for each of the feeder disconnectors One for the circuit-breaker and the grounding switch.

They are sealed compartments, made of stainless steel and sealed for life. All three have been designed and tested to withstand an internal arc of up to 31.5 kA - 1 s.

CAUTION

Do not refill the switchgear

Figure 1.2: Switch compartments and disconnector

Depending on the function for which the cubicle was designed, it may contain the following components:

Disconnectors Grounding switch Internal busbar and connections. Fuse holders Vacuum circuit-breaker

CAUTION

This device may emit X-rays if voltage higher than rated maximum is applied across the open contacts or if contacts are spaced less than rated stroke. In such case, personnel must be protected with appropriate shielding.

There are sets of bushings in the top and bottom of both compartments for connection of the busbar and the power cables respectively.

For testing the gas pressure in each compartment, a temperature-compensated pressure switch is installed, with a volt-free contact, for possible use as a remote alarm or blocking/trip for the functional unit.

CAUTION

Pressure gauge is not intended to be used for telemetry purposes

Busbar: This is used for connecting cubicles. It has solid and shielded insulation, grounded by means of the compartment's specific grounding bar. As an option, the busbar is able to segregate the phases by means of a set of grounded metal plates (metal-clad). Toroidal current transformers and/or plug-in voltage transformers can be installed in this compartment, thus avoiding the need for metering cubicles. 6

2

1

40





2012.05.14

of 40

Cable compartment: Located in the lower part of the cubicle, this has a cover, interlocked with the grounding circuit, which allows front access to the medium voltage cables.

In the most complete case, the base can house the following components:

Phase segregation consisting of the main box and the segregating cover.

Up to 4 screw-in shielded terminals per phase, as well as space for the corresponding incoming power cables.

Figure 1.3: Phase segregation in the cable compartment (optional)

Cable clamps for the medium-voltage cables

Grounding bars

Toroidal current transformers

Plug-in voltage transformers

Surge arresters All the elements making up the enclosure are grounded by means of a conductor consisting of a copper bar capable of withstanding the rated short-time current. It is located in the base in such a way that it does not need to be dismantled in order to insert or remove a cable and its corresponding termination. Gas pressure relief duct (optional): This component is used to direct the gases produced by an internal arc in any of the compartments towards the top of the cubicle: Disconnector Compartment and Circuit-Breaker Compartment, Upper Busbar Compartment and Cable Compartment.

a Gas vent from Busbar compartment c

Gas vent from Circuit-Breaker and Grounding Switch compartment

b Gas vent from Disconnector compartments d Internal arc gas directional duct

Figure 1.4: Internal arc gas pressure relief duct (optional)

4

d

a

b

c

3

of 40





2012.05.14

Control compartment: Placed at the top of the cubicle and separate from the medium voltage area, this is ready for installation of the metering equipment and protection relays. It contains the whole terminal block with the control signals already identified.

Figure 1.5: Control compartment Driving mechanism area: In addition to a mimic diagram customized for each type of cubicle, this has the switching components in its middle section: disconnector/grounding

switch and circuit-breaker driving mechanisms, circuit-breaker opening/closing push-buttons, status indicators, groove for access of the spring charging lever, etc.

Figure 1.6: General manual operation panel

6

5

Feeder disconnector operation and indication

area

Lever access interlock

Grounding switch indication area

Circuit-breaker operation and indication area

Cable cover interlock

Voltage presence detector

40





2012.05.14

of 40

1.1.2. Levers for Manual Operation

Figure 1.7: Lever for manual charge of the circuit-breaker springs in a CPG.1-V cubicle

Figure 1.8: Lever for manual operation of the feeder disconnectors

Figure 1.9: Lever for manual operation of the grounding switch

Figure 1.10: Lever for manual operation of the CPG.1-F cubicle

of 40





2012.05.14

1.1.3. Manual operation panel

a Disconnector operation and indication area d Circuit-Breaker operation and indication area b Voltage Presence-Absence Indicator e Grounding Switch operation and indication area c Lever access interlock f Cable cover interlock

Figure 1.11: Mimic diagram and operation panel

a Disconnector operation and indication area d Grounding Switch operation and indication area b Voltage Presence-Absence Indicator e Cable cover interlock c Lever access interlock


e

a

b

d

f

c

CPG.1-V1

d

a

b e

c

CPG.1-S1

40





2012.05.14

of 40

a Disconnector operation and indication area c Circuit-Breaker operation and indication area

b Lever access interlock d Grounding Switch operation and indication area Figure 1.13: Mimic diagram and operation panel

a Voltage Presence-Absence Indicator e Cable cover interlock b Lever access interlock f Blown fuse indicator c Switch operation and indication area g Switch opening handle d Grounding Switch operation and indication area


NOTE

Configuration with motorized operation in the Switch-Disconnector. Operation of the Grounding Switch cannot be motorized.

d

a

c

b

CPG.1-C type C

CPG.1-F1

e

a g

c d

f

b

CPG.1-C type M

d

a

c

b

of 40





2012.05.14

1.1.4. Voltage Presence-Absence Indicator

The voltage presence/absence indicator installed in CPG.1 cubicles is designed and built in accordance with the recommendations laid down in standards IEC 61243-5, VDE 0682 Part 415 and IEC 61958, within the integrated detectors without auxiliary power supply category.

Figure 1.15: Indicator of presence-absence of voltage

The unit has three light signals corresponding to phases L1, L2 and L3. On the front of the indicator, a test point is accessible for each of the phases and ground, which is used to test the balance of all phases. We recommend use of any universal phase comparator which complies with standard IEC 61243-5.

As an option, the unit has a free auxiliary contact for remote indication of voltage presence/absence.

The device indication complies with the requirements laid down in standard IEC 61243-5:

Absence of voltage

Uncertainty Presence of voltage

U < 10% Ur 10% Ur < U < 45% Ur U > 45% Ur *Ur, rated operating voltage U, phase-to-ground voltage

The presence of voltage is indicated by activation of the LEDs for each of the phases. If the presence of voltage is not detected, the LEDs for each of the phases remain unlit.

40





2012.05.14

of 40

1.1.5. Name Plate

Every cubicle includes a name plate, with some of the following values:

Nameplate

General instr. Manual of General Instructions (IG) corresponding to the system

Nº Cubicle serial number (*)

Designation Cubicle model

Type Type of circuit-breaker (if applicable) / Continuous duty / Indoor General purpose

Ur Equipment rated voltage (kV)

BIL (Up) Lightning impulse withstand voltage (kV)

Ud Power frequency withstand voltage (kV)

fr Equipment rated frequency (Hz)

Ir / Iload Equipment rated continuous current and load switching current (A)

Icc Equipment rated cable-charging switching current (A)

Iut Equipment rated unloaded transformer switching current (A) (if applicable)

M1 or M2 Number of mechanical operations (switch: 1000 or 5000 operations; circuit-breaker 2000 or 10000 operations)

Ik / Ip Short-time withstand current/ Short-time withstand peak value - Fault making current (kA)

tk Short-time withstand current time (s)

Pre/Pme Rated filling pressure for insulation / Rated filling pressure for operation (kPa)

Pme/Pmm Minimum functional pressure for insulation / Minimum functional pressure for operation (kPa)

Ua Rated auxiliary voltage (Vdc)

SF6 Weight of insulating fluid (g)

Weight Total weight of cubicle (kg)

Date Month and year of manufacture

Tc Thermal class (ºC)

DC Percentage of DC component in circuit-breaker cubicle (%)

Int.time Rated interrupting time in circuit-breaker cubicle

Duty Cycle Rated operating duty cycle in circuit-breaker cubicle

Isc Rated short-circuit switching current in circuit-breaker cubicle (kA)

Address Factory address (*) In the event of a problem or non-conformity, note down this number and send it to Ormazabal's Technical - Commercial Department.

of 40





2012.05.14

1.2. GENERAL SERVICE CONDITIONS

Installation Indoors

Maximum ambient temperature 104 ºF (+40ºC) (a)

Minimum ambient temperature 23 ºF (-5ºC) ()

Maximum average ambient temperature, measured over a 24-hour period 95 ºF (+35ºC)

Maximum average relative humidity, measured over a 24-hour period < 95%

Maximum average relative humidity, measured over a 1-month period < 90%

Maximum height above sea level 3,250 feet (1,000 m) (c)

Solar radiation Negligible

Environmental air pollution (dust, salinity, etc.) Insignificant

Vibrations (seismicity) Negligible

(a) For special operating conditions (maximum ambient temperature greater than 104 ºF (+40ºC)), please consult Ormazabal’s Technical - Commercial Department. (b) For special operating conditions (minimum ambient temperature lower than 23 ºF (-5ºC)), please consult Ormazabal’s Technical - Commercial Department. (c) For higher altitudes, please consult Ormazabal’s Technical - Commercial Department.

NOTE

The specifications refer to the section 'Normal service conditions for indoor cubicles' in the IEC 62271-1 standard (formerly IEC 60694) 'Common specifications for high-voltage cubicles'.

40





2012.05.14

of 40

h

f

a

1.3. MECHANICAL CHARACTERISTICS

1.3.1. Dimensions and Weights

CPG.1-V1 CIRCUIT-BREAKER CUBICLE

Figure 1.16: Dimensions of CPG.1-V1 cubicle

Dimensions [inches (mm)] Cubicle CPG.1-V1 Width (a) 23 (600) Depth (f) 74 (1,900) Height (h) 98 (2,500)

Anchorage points[1] Level b 21 (550) Level c 20 (500) Level d 23 (590)

Weight [pounds (kg)] Total 500 (1100)

[1] See plan of anchorage points in section 4.1.1.

of 40





2012.05.14

f

h

a

CPG.1-S1 DISCONNECTOR CUBICLE

Figure 1.17: Dimensions of CPG.1-S1 cubicle

Dimensions [inches (mm)] Cubicle CPG.1-S1 Width (a) 23 (600) Depth (f) 74 (1,900) Height (h) 98 (2,500)

Anchorage points[2]

Level b 21 (550) Level c 20 (500) Level d 23 (590)

Weight [pounds (kg)] Total 455 (1,000)


40





2012.05.14

of 40

h

Dimensions [inches (mm)] Cubicle CPG.1 type C Width (a) 23 (600) Depth (f) 74 (1,900) Height (h) 98 (2,500)

Anchorage points[3]

Level b 21 (550) Level c 20 (500) Level d 23 (590)



Figure 1.18: Dimensions of CPG.1 type C cubicle

CPG.1-C TYPE C COMPACT BUSBAR COUPLING CUBICLE

fa

of 40





2012.05.14

Dimensions [inches (mm)] Cubicle CPG.1-C type M Width (a) 46 (1200) Depth (f) 74 (1,900) Height (h) 98 (2,500)




Figure 1.19: Dimensions of CPG.1-C type M cubicle

CPG.1-C TYPE M BUSBAR COUPLING CUBICLE

h

a

f

h

40





2012.05.14

of 40

fa

h

CPG.1-F1 FUSE PROTECTION CUBICLE

Figure 1.20: Dimensions of CPG.1-F1 cubicle

Dimensions [inches (mm)] Cubicle CPG.1-F1 Width (a) 23 (600) Depth (f) 74 (1,900) Height (h) 98 (2,500)



[5] See plan of anchorage points in section 4.1.1

of 40





2012.05.14

1.4. MAIN ELECTRICAL CHARACTERISTICS

CHARACTERISTICS CPG.1-V1 CPG.1-S1 CPG.1-C CPG.1-F1Rated voltage kV 27 / 38

Rated current in continuous operation: A

Main busbar 2,000 2,000 2,000

2,000

Outgoing line 2,000 2,000 200

Rated frequency Hz 50 / 60

Lightning impulse voltage:

kV

Between phases and phase-to-ground 125 / 170

145 / 195 Isolating distance Power frequency voltage

kV

Between phases and phase-to-ground 60 / 80

66 / 88 Isolating distance Reclosing sequence O-0.3 s-CO-

15 s-CO NA

O-0.3 s-CO- 15 s-CO

NA

Rated short-time current Main circuit

kA 25 / 31.5

Rated short-time current Grounding circuit

kA 25 / 31.5 1 / 3

Peak rated current Main circuit

kA 65 / 82

Peak rated current Grounding circuit

kA 65 / 82 2.5 / 7.5

Rated short-circuit time s 1 / 3

Rated short-circuit breaking current kA 25 / 31.5 - 25 / 31.5 -

Rated short-circuit making current kA 65 / 82 - 65 / 82 -

DC % 45 - 45 -

Opening time ms < 45 - < 45 -

Short-circuit break-time ms < 50 - < 50 -

Rated no-load feeder current A 50 - 50 -

Rated no-load cable current A 31.5 / 50 - 31.5 / 50 -

Rated capacitor bank current A 400 - 400 -

Rated internal fault current kA 31.5

Rated internal fault time s 1

Electrical endurance E2/C2 - E2/C2 E3/E2

Auxiliary voltage Vdc 125

Motorized spring charging time ms < 15 - < 15 -

Mechanical endurance M2 M0 M2 M2

40





2012.05.14

of 40

2. TRANSPORT

2.1. LIFTING METHODS

The cubicles must always be kept upright, directly on the ground or on a pallet depending on the type of handling involved. CPG.1 cubicles have four eyebolt-type suspension points which can be used for handling the cubicles with a crane; to do this, 4 slings or cloth straps are used capable of carrying at least 1136 pounds (2500 kg).

CAUTION

Check that the cubicle is perfectly balanced at all times.

Once the cubicle has been sited as close as possible to its final installation position, remove all four suspension points from the cubicle.

Figure 2.1: Lifting a CPG.1 cubicle with slings

If a forklift truck is available, this should have a fork at least 78 inches (2 m) long and be capable of carrying at least 1136 pounds (2500 kg).

CAUTION

The cubicle should always be loaded onto the forklift truck from the front, as indicated in the figure.

Figure 2.2: Lifting a CPG.1 cubicle with a forklift truck To put the cubicles in their final position, elevating caster wheels can be used.

of 40





2012.05.14

3. STORAGE If it needs to be stored, the equipment must be placed on dry ground or on top of damp-proof insulating material, still in its original packaging. After prolonged storage, clean all the insulating parts carefully before commissioning the equipment. The enclosure should be cleaned with a clean dry lint-free cloth.

Figure 3.1: Conditions for storage

Maximum height above sea level 3,250 feet (1,000 m).

Do not store in harsh environments.

23 ºF ( -5 ºC) min

104 ºF (40 ºC) max

40





2012.05.14

of 40

4. INSTALLATION

4.1. CIVIL ENGINEERING WORKS

The minimum distances to the walls and roof, and from the trench for the MV cables are as follows:

Figure 4.1: Minimum recommended installation distances

Minimum Distances [inches (mm)] Cubicle

Side wall (a)[1] > 3.91 (100) Ceiling (b)[1] > 23.45 (600)

Front clearance (c) Operation:

> 39.08 (1,000) Cubicle removal:

> 78 (2,000) Rear wall (d)* > 3.91 (100)

Trench [2] Depth (e) > 23.45 (600) Width (f) 37.13 (950) [1]In accordance with Appendix A of standard IEC 62271-200. For other dimensions, please consult Ormazabal's Technical - Commercial Department. [2]The dimensions of the trench depend on the minimum radius of curvature of the cables used.

a

b

c

e

f

d

of 40





2012.05.14

4.1.1. Anchorage Points

Figure 4.2: Anchorage points

40





2012.05.14

of 40

5. SEQUENCE OF OPERATIONS

DANGER

Do not operate if SF6 pressure is low For safety reasons, maintenance operations performed directly on the driving

mechanism must be performed WITHOUT any actuating lever inserted

CAUTION


The order in which steps should be followed when performing any type of operation is the same for both automated operation and manual operation. Push-buttons are used for automated operation, whereas manual operation is performed by means of the corresponding levers.

5.1. CPG.1-V1 CUBICLE

5.1.1. Commissioning from the Open Position

1. Close the Feeder Disconnector.

2. Next, close the Circuit-Breaker.

To put the equipment out of commission, reverse the sequence of operation.

Figure 5.1: CPG.1-V1 cubicle

of 40





2012.05.14

5.1.2. Grounding the MV Cables

1. Close the Grounding Switch (1).

2. The Circuit-Breaker closes instantaneously on removal of the actuating lever.

(1): If all the switchgear elements are motorized, the Grounding Switch and Circuit-Breaker closing operations are performed consecutively as programmed from the automated operation panel.

To open the MV cable Ground Connection, reverse the sequence of operation.

NOTE

The Circuit-Breaker opening operation is always performed manually.

5.2. CPG.1-S1 CUBICLE

5.2.1. Closing


To put the equipment out of commission, reverse the sequence of operation. 5.2.2. Grounding

1. Close the Grounding Switch.

To open the Ground Connection, reverse the sequence of operation.

Figure 5.2: CPG.1-S1 cubicle

40





2012.05.14

of 40

5.3. CPG.1-C type C CUBICLE

5.3.1. Busbar Coupling

1. Close the right-hand Feeder Disconnector.

2. Next, close the left-hand Feeder Disconnector.

3. Finally, close the Circuit-Breaker.

To uncouple the busbars, reverse the sequence of operation.

5.3.2. Busbar Grounding on the Right:

1. First, close the right-hand Feeder Disconnector.

2. Next, close the left-hand Grounding Switch.

Figure 5.3: CPG.1-C type C cubicle

of 40





2012.05.14

3. The Circuit-Breaker closes instantaneously on removal of the actuating lever once the operation is complete.

(1): If all the switchgear elements are motorized, the Grounding Switch and Circuit-Breaker closing operations are performed consecutively and per program


NOTE


5.3.3. Busbar Grounding on the Left:

1. First, close the left-hand Feeder Disconnector.

2. Next, close the right-hand Grounding Switch.




NOTE


40





2012.05.14

of 40

5.4. CPG.1-C type M CUBICLE

5.4.1. Busbar Coupling

1. Close the right-hand Feeder Disconnector.

2. Next, close the left-hand Feeder Disconnector.

3. Finally, close the Circuit-Breaker.

To uncouple the busbars, reverse the sequence of operation.

5.4.2. Busbar Grounding on the Right:

1. First, close the right-hand Feeder Disconnector.

2. Next, close the left-hand Grounding Switch.

Figure 5.4: CPG.1-C type M cubicle

of 40





2012.05.14




NOTE


5.4.3. Busbar Grounding on the Left:

1. First, close the left-hand Feeder Disconnector.

2. Next, close the right-hand Grounding Switch.




NOTE


40





2012.05.14

of 40

5.5. CPG.1-F1 CUBICLE

5.5.1. Commissioning the Cubicle


2. Next, close the Switch. To put the equipment out of commission, reverse the sequence of operation. 5.5.2. Grounding the MV Cables and Fuses

1. Open the Switch.

2. Next, open the Feeder Disconnector.

3. Finally, close the Grounding Switch. To open the Ground Connection, reverse the sequence of operation. 5.5.3. Selection of Fuses Recommended for CPG.1-F1

The fuses recommended for use in the CPG.1-F1 cubicle are defined according to tests carried out by the manufacturers. The following table shows the recommended fuse ratings according to the Ur/Ptransf. ratio:

Ur Grid [kV]

Ur Fuse [kV]

Rated Transformer Power WITHOUT OVERLOAD [kVA]

25 50 75 100 125 160 200 250 315 7.2 6/12 6,3 16 16 20 20 25 40 40 50

12.5 10/24 6,3 6,3 16 16 16 20 20 25 31,5

13.2 10/24 6,3 6,3 10 16 16 20 20 25 31,5

14.4 10/24 6,3 6,3 10 16 16 16 20 20 25

25 10/24 6,3 6,3 6,3 6,3 10 16 16 16 20

34.5 20/36 - - - 6,3 6,3 10 10 16 16

Figure 5.5: CPG.1-F1 cubicle

of 40





2012.05.14

Ur Grid [kV]

Ur Fuse [kV]

Rated Transformer Power WITHOUT OVERLOAD [kVA]

400 500 630 800 1000 1250 1600 2000

7.2 6/12 63 80 100 160 200 250 - -

12.5 10/24 40 50 63 80 80 125 - -

13.2 10/24 40 50 63 63 80 100 - -

14.4 10/24 40 40 50 63 80 80 - -

25 10/24 20 25 31,5 40 50 50 80 80

34.5 20/36 20 20 31,5 31,5 40 40 50 63

Remarks: Fuses recommended: SIBA brand with medium type striker, conforming to IEC 60282-1 (Low loss

fuses) The values for combined fuses, acc. IEC 62271-105 (IEC 60420), are shown in bold. The fuse-switch assembly has been temperature-rise tested under normal service conditions according

to IEC 60694. A fuse-holder carriage adapted for 11 inches (292 mm), 6/12 kV fuses is available. For ratings not in bold the measurement is 17 inches (442 mm). If any of the fuses blows, we recommend changing all three. For overload conditions in the transformer or use of other brands of fuse, please consult Ormazabal's

Technical-Commercial Department. General operating conditions: without overload, and temperature < 104ºF (40ºC) The values marked with an (*) correspond to SSK-type fuses. Maximum permitted power loss for a fuse: < 75 W.

5.5.4. Fuse Replacement Sequence in CPG.1-F1

Since this is a switch-fuse combination cubicle, any of the three fuses blowing causes the Switch-Disconnector to open automatically. When a fuse blows, this is indicated unequivocally by the red indicator which appears on the front of the operation panel.

Figure 5.6: Blown fuse indication

40





2012.05.14

of 40

1 To access the fuses, close the Grounding Switch and, once you have removed the fuse and MV cable access panel and identified the blown fuse (the striker will be in the up position), turn the handle of the corresponding fuse holder cover upwards until the locking clip is unhooked and then pull sharply outwards.

Figure 5.7: Opening the fuse holder in CPG.1-F1

2 Pull out the fuse holder carriage.

Figure 5.8: Removing the fuse holder carriage in CPG.1-F1

3 Replace the blown fuse. It is advisable to change all three fuses, even if they do not appear to be damaged.

NOTE

Make sure that the end of the new fuse with the striker faces the insulator end.

Figure 5.9: Changing the MV fuse

of 40





2012.05.14

4 Insert the fuse holder carriage.

NOTE

Before re-inserting the fuse holder carriage, it is important to ensure that both the carriage and the inside of the fuse holder are properly clean.

Figure 5.10: Inserting the fuse holder carriage in CPG.1-F1

5 Before closing the cover, press downwards to reset the striker.

Figure 5.11: Resetting the striker in the fuse holder cover in CPG.1-F1

6 To close the cover, first make sure that the clip is correctly engaged, and then turn the handle down into its vertical position.

Figure 5.12: Closing the fuse holder in CPG.1-F1

40





2012.05.14

of 40

5.6. INTERLOCKS IN CPG.1

The Feeder Disconnectors, Circuit-Breaker and Grounding Switch are interlocked in accordance with section 5.11 of standard IEC 62271-200.

Access to the Disconnector actuation shafts is possible using a ‘Lever access’ sliding interlock; the levers on both types of disconnector (Feeder Disconnectors and Grounding Switch) can only be inserted if the Circuit-Breaker is in the open position (O). The Circuit-Breaker can only be operated if all the Disconnector actuating levers have previously been removed. Also, all electrical operations are overridden if any of the levers has been inserted in the actuation shaft.

The Circuit-Breaker can only be put into commission if the Disconnector or Grounding Switch is in closed position. In the effective ground connection, all electrical commands are overridden and opening is always performed manually.

The cable compartment is only accessible with the Grounding Switch and the Circuit-Breaker closed (effective ground connection).

In functional units which incorporate fuses (protection by means of a switch-fuse combination and busbar voltage metering with disconnection and fuses), access to the fuse compartment is interlocked with the corresponding Switch-Disconnector so that the compartment is only accessible with the Grounding Switch in the closed position.

of 40





2012.05.14

6. MAINTENANCE

6.1. MECHANICAL MAINTENANCE

DANGER

For safety reasons, maintenance operations performed directly on the driving mechanism must be performed WITHOUT any actuating lever inserted

CAUTION


NOTE

Switchgear is guaranteed against SF6 leakage for 30 years

Due to its configuration in totally sealed compartments, CPG.1 cubicles do not require any type of electrical maintenance on their MV circuits.

Although the driving mechanism has proven mechanical endurance of 10,000 operations, it is advisable to undertake preventive maintenance every 5 years or 2,000 operating cycles, unless the user, together with Ormazabal's Technical - Commercial department, consider otherwise, based on the conditions of use.

For safety reasons, during maintenance operations the following conditions must be observed:

Switch closed and Grounding Switch closed

Auxiliary circuit power supply cut

Operation control equipment disconnected

Opening and closing springs discharged

CAUTION

Adjusting elements such as: opening stop piece, damper, plugs, nuts and bolts, which have been sealed must not be adjusted.

6.1.1. Checking Operations

The objective is to check the state of the equipment prior to commencing maintenance operations.

Perform two manual operations:

First: Open the switch. Charge the spring manually. Close the switch and check that the opening latch is stable. Open the switch.

Second: Charge the closing spring. Close. Charge the closing spring. Open. Close and Open.

40





2012.05.14

of 40

Next, perform two motorized operations with coil (or with coils). First: Charge with motorization (check microswitches M0, M1 and M6) and close with closing

coil. Open with opening coil.

Second: Charge the closing spring and close with coil. Charge the closing spring. Open, Close and Open with coils. Check the reset system.

NOTE

These operations should be performed with a device which can control parameters with the values indicated by Ormazabal's Technical - Commercial Department.

6.1.2. Inspection and Maintenance Operations

DANGER

For safety reasons, maintenance operations performed directly on the driving mechanism must be performed WITHOUT any actuating lever inserted

You should take account of the number of counter operations, the date of installation and location characteristics, and also whether it is the first preventive maintenance, and any previous corrective maintenance, when carrying out further preventive maintenance. Check that none of the nuts and screws has come loose, especially the screwed joints attaching the squares supporting the chassis to the cubicle structure and those which form the driving mechanism structure. It is not necessary to retighten them to the rated tightening torque unless you have checked that the joint requires it. Simply test it manually with a standard key. If you notice slight non-functional rusting on any component that does not affect its operation, apply an aerosol antioxidant. Do not use harsh liquids such as solvents, etc., nor apply compressed air to get rid of small particles or accumulated dust. You need to take special care with the parts inside the chassis: transmissions, pawls and cams, taking their functionality and physical appearance into account. Check that the sealed adjustments have not been altered, especially the opening stop piece and the fixing nuts on the phase transmission and output shaft. If this is the case, correct them. If you detect any loose connections, use Loctite A-270 and apply the rated torque corresponding to the design specifications. Take care that the connecting cables are not anywhere near the transmission moving areas.

of 40





2012.05.14

Check that the elastic rings, split pins and ratchet and interlock recoil springs are in place, and have not come loose or undone. We recommend that these are replaced, paying special attention to those in the main driving chain. In any case, every 4 maintenance cycles (4 x 2,000 = 8,000 CO) the elastic ring on the toothed load wheel must be replaced. Lubricate all the turning points for the shafts, bearings, sleeves, rollers, and in general any sliding elements. Use Super-Lube Teflon-based spray lubricant, with application tube to ensure the product is applied only where needed. Check the latching system, checking that it is held in a stable position on the closing ratchet and that the opening latch ‘returns’ to position itself under the latch shaft quickly and with minimum play of 0.08 inches (2 mm). Check the consumption of the spring charging motor and the status of the motor operation microswitches M0, M1 and M6, replacing them if necessary. In any case, every 2 maintenance cycles (2 x 2,000= 4,000 CO) the gearbox motor should be replaced. If you have made any correction to the driving mechanism, you must run through the checking operations, as described in section 6.6.1, twice fully. If not, simply perform a number of operations to homogenize the lubricant. 6.2. VOLTAGE PRESENCE-ABSENCE INDICATOR MAINTENANCE

The voltage presence/absence indicator does not require any maintenance tests, since the device constantly checks whether the voltage for each of the phases is higher than the value laid down by standard IEC 61243-5, showing this by activity of the LEDs. Should it be necessary to check that the unit is working correctly, or even to replace it, simply remove the front cover of the enclosure and undo the 4 nuts supporting it. The unit can then be removed without any need to power down the line supply. To check that the indication unit is working correctly, apply 220 Vac between the ground test point and the test point of each of the phases. Operation is correct if intermittent flashing can be seen on each phase that has been checked. To re-install the unit in the cubicle, simply insert the indicator in the cubicle and replace the nuts and screws that were removed earlier.

40





2012.05.14

of 40

7. ADDITIONAL INFORMATION

7.1. SPARES

Although all the components of the CPG.1 cubicles have passed both routine tests during the manufacturing process and type tests prior to approval, some of them can be changed, replaced and even installed in the field: Circuit-Breaker charge motor Disconnector and Grounding Switch driving mechanism Components in the low-voltage and control circuits Actuating lever Opening or closing coils Voltage presence/absence indicator

If any of the stated auxiliary components need to be changed, the corresponding spare parts kit must be ordered, and the instructions given in the corresponding documentation must be followed.

7.2. CUBICLES EQUIPPED WITH VIDEO MONITOR FOR VISUAL CONFIRMATION OF THE SWITCH POSITION

The camera is located in a sealed compartment, protected from dust or aggressive environment. It is, nevertheless, accessible to repairs and maintenance labors.

of 40

TECHNICAL - COMMERCIAL DEPARTMENT:

www.ormazabal.com

cpg.1 sf insulated medium voltage modular gis cubicles up to 38 kv ... · sf6i insulated medium...

Documents