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BUDI ADI NUGROHO15 DECEMBER 2012

Definition

One line diagram or single-line diagram is simplified

notation for representing a three-phase power

system.

Electrical elements such as circuit breakers,

transformers, capacitors, switchboards, busbars,cables, conductors are shown by standardized

schematic symbols.

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References

Design Input dan Output Electrical IEC 60617 Graphical Symbols for Diagrams

IEEE 315 Graphics Symbols for Electrical &

Electronics Diagrams

ANSI Y14.15 Electrical & Electronics Diagrams

Electrical Load List

Power System Analysis

Workstep1. Grouping MCC loads to follow plant area loads. Grouping based on:

- Motor, feeder, voltage level, service area, essential, non-essential, emergency, etc.

2. Develop network to establish power distribution/load flow from powerhouse /power supply to loads including distribution system sub system , for example :

From generator to switchgear.

From switchgear to Disconnecting Switch.

From Disconnecting Switch to transformator.

From transformator to MCC/MDB.

From emergency power to emergency bus.

From emergency bus to emergency MCC.

From emergency MCC to UPS.

From switchgear to synchronizing bus.

3. Detail information covering technical data of equipments, protection devices,metering, space heater and others (samples shown on SLD presentation tables)

4. Block diagram for generator control, switchgear control, interlock

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SLD Presentation tableEQUIPMENT INFORMATION

PROTECTION

DEVICESMETERING

Powerhouse Equipment number MVA, Xd, PF

generator CT/PT ratio Type & breaker cap. Interlock system Ammeter/Voltmeter

scale Metering quantity

Differential relay Overcurrent relay Ground relay Lock out relay Reverse power

relay CB

kW kWh kVAR Ammeter Voltmeter cos meter

Switchgear Equipment number Bus rating &

electrical system CT/PT ratio Type & breaker cap. Interlock system Ammeter/voltmeter

scale Metering quantity

Overcurrent relay Undervoltage

relay Ground relay Lock out relay CB

kW kWh kVAR Ammeter Voltmeter

Line Cable Cable number Size (mm

2/AWG)

Core Type (A/C) Insulation Length

DS/LBS Equipment number Bus rating &

electrical system Fuse rating

Fuse with shunttrip

SLD Presentation tableEQUIPMENT INFORMATION

PROTECTION

DEVICESMETERING

Transformer Equipment number Connection system Primary/secondary

ratio Nominal kVA % impedance

- NGR if required

Bucholtz relay

- DifferentialRelay if rquired

Pressure gauge Temperature

gauge

Bus Duct Equipment number Busduct capacity

* heater if required

MCC Equipment number Equipment service Bus rating &

electrical system CT/PT ratio Type & breaker cap. Interlock system

Overcurrent relay Ground relay Lock out relay

CB

kW kWh kVAR

Ammeter Voltmeter cos meter

Motor Equipment number Equipment service Output (kW/HP) Status

(running/stand by) Local control switch CT/PT ratio Type & breaker cap.

Overcurrent relay Ground relay Lock out relay Thermal Overload CB

* Space heater if required

kW kWh kVAR Ammeter Voltmeter cos meter

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FROM PID TO SLD, ILLUSTRATION

FROM PID TO SLD, ILLUSTRATIONPID COOLING

SYSTEM

MECH / ELECT

DATA / SIZING +

OPERATION

REQUIREMENT

DETAIL SLD 400V

POSITION AT

OVERALL SLD-SCHEMATIC +CONNECTION

DIAGRAM

- CABLE

SCHEDULE

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SLD IEC SYMBOLS

SLD

ANSI SYMBOLS

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SLD - Overall

SLD - MVSystem

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SLD - LV System

SLD - UPS/DC System