SAMPLE DRAWING

SINGLE LINE DRAWING FOR LARGE DG'S WITH PRIMARY LINE PROTECTION

PGI.£ SYSTEM

PG&.E SWITCH t PG&.E SIDE

PRODUCER'S DG FACILITY

¥""'"RULE 21 DISCQNllECT DEVICE

REQUIRED PROTECTION PULSES.J TD RTN

DEV 25 27 32 46 50/51V 50/51N 59 67 81

FUNCTION SYNCH CHECK UNDER VOLT AGE DIRECTIONAL PO\IER NEG SEQUENCE DC INST &. TD DC VOLT RES INST &. TD DC GROUND OVER VOLT AGE DIRECTIONAL DC

TD PG&.E

BREAKER

87T RTU SUPV JNTERITE Bl<R TRIP

87B 87T 50/51

OVER/UNDER FREQ BUS DIFFERENTIAL TRANS DIFFERENTIAL

INST. &. TIME O.C. 1 NEUTRAL •

3~-REACTOR ,l ~~~~~ +- GENERATOR BREAKER STATUS PGLE-+ ALARMS

GENERATOR PROTECTION REQUIRED OVER/UNDER VOLTAGE OVER/UNDER FREQUENCY NEGATIVE SEQUENCE REVERSE PO'WER VOLTAGE RESTRAINT OVER CURRENT LOSS OF EXCITATION RECOMMENDED GROUND PROTECTION DIFFERENTIAL PROTECTION

T'WO MICROPROCESSOR RELAYS MAY BE USED. IF ONE MICROPROCESSOR RELAY IS USED, THE RELAY ALARM MUST TRIP THE BREAKER.

u1141,

6. ,, )

) SYNCH ) SYNCH

HIGH IMPEDANCE GROUNDED GENERATORS 'WITH GENERATOR PROTECTIVE RELAYING

TELEMETERING

i )

TD LOADS

SAMPLE DRA \JING

SINGLE LINE DRA \JING FDR DG'S \v'ITH SECONDARY LINE PROTECTION

t PGl.E SYSTEM

PGl.E SWITCH PGl.E SIDE ~~~ ~~~~~

BILLING METERING PRODUCER'S DG FACILITY

PRIMARY METERING CUBICLE LIPA CS 8735

REQUIRED PROTECTION

DEV 25 27

FUNCTION SYNCH CHECK

RULE 21 DISCONNECT SWITCH .........

CUSTOMER OWNED TRANSFORMER <MAXIMUM 150KVA>

32 50/51V 50/51N 59 67 46

UNDER VOLT AGE DIRECTIONAL PO\JER INST 8. TD DC VOLT RES INST 8. TD DC GROUND OVER VOLT AGE DIRECTIONAL DC NEG SEQUENCE DC OVER/UNDER FREQ

•TTTT~

b$~t INST 8. TD DC 81 50/51V 87B 87T

BUS DIFFERENTIAL TRANS DIFFERENTIAL INTERCONNECTION )

BREAKER

GENERATOR PROTECTION REQUIRED OVER/UNDER VOLTAGE OVER/UNDER FREQUENCY NEGATIVE SEQUENCE REVERSE POW'ER VOLTAGE RESTRAINT OVER CURRENT LOSS OF EXCITATION RECOMMENDED GROUND PROTECTION DIFFERENTIAL PROTECTION

T\JO MICROPROCCESSOR RELAYS MAY BE USED IF ONE MICROPROCCESSOR RELAY IS USED, THE RELAY ALARM TRIP THE BREAKER.

nISOLA TION TRANSFORMER MAY NOT BE REQUIRED IFi A) HARMONIC REQUIRMENTS ARE MET AND TESTED AND B) NEUTRAL REATORS PROVIDE EFFECTIVELY

GROUNDED SYSTEM AND C) FAULTS ON THE LIPA SYSTEM CAN BE

SELECTIVELY DETECTED.

) SYNCH

TD PGa.E

ONLY I

__ _J

ISOLATION TRANSFORMER ••

) SYNCH

r--_, __ . NEUTRAL REACTOR llOIE

I