GE P54C User Manual

9 APPLICATION NOTES
9.1 MULTI-END CURRENT DIFFERENTIAL PROTECTION
P54A, P54B, P54C and P54E products provide current differential protection for electrical feeders having between 2
and 6 terminals. It is implemented using distributed pr
otection devices located at each feeder terminal with all
devices interconnected by a fiber optic communications ring structure. The fiber optic communications are based
on the IEEE C37.94 standard interface. The following figure shows an example topology.
V02623
T1
T2
T3 T4
T5
T6
J1 J2 J3 J4
Fiber optic communication ring
Figure 45: Six terminal, four junction topology and ring structure
A B
DE
CF
Ch1
Ch1
Ch1
Ch1
Ch1
Ch1
Ch2
Ch2
Ch2
Ch2
Ch2
Ch2
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Fixed configuration
3-6 ends, ring connected.always
(optimum performance)
Note the channel allocation (Ch1/Ch2)
E02524
Figure 46: Six terminal ring structure with channel allocation
P54A/B/C/E Chapter 6 - Current Differential Protection
P54xMED-TM-EN-1 115

GE P54C Specifications

General

Brand	GE
Model	P54C
Category	Relays
Language	English