GE P743 User Manual

P74
x/EN IT/Na7
Introduction
(IT) 1
-6
MiCOM P741, P742, P743
IT
3. PRODUCT SCOPE
The P74x differential busbar protection relays have been designed for the protection of a
wide range of substation busbars from distribution to transmission voltage levels. The relays
include a comprehensive range of non-protection features to aid with system diagnosis and
fault analysis. The P74x offers integral biased differential busbar, breaker failure, dead zone,
overcurrent and earth-fault protection and is suitable for application on solidly grounded,
impedance grounded, Petersen coil grounded and isolated systems. The relays are
especially suitable where a complete scheme solution is required.
The scheme comprises of three relays:
• The P741 (Central Unit),
• The P742 and P743 (Peripheral Units).
Which, together with the topology configuration software and the dynamic synoptic
monitoring tool, allow full flexibility for all configurations.
3.1 Functional overview
The P74x Busbar protection contains a wide variety of protection functions. The protection
features are summarized below:
Protection Functions Overview
ANSI IEC 61850 Function P741 P742 P743
87BB / P PhsPDIF Phase segregated biased current differential high speed and
delayed busbar protection
•
- -
87CZ / P CzPPDIF Check Zone segregated biased phase current differential
high speed and delayed busbar protection
•
- -
87BB / N NeuPDIF Sensitive earth fault bias current controlled busbar protection
•
- -
87 CZ/ N CzNPDIF Check Zone segregated biased earth current controlled
busbar protection
•
- -
50 / 51 / P OcpPTOC Phase overcurrent protection (2 stages) -
•
•
50 / 51 / N EfmPTOC Earth overcurrent protection (2 stages) -
•
•
50ST / P DzpPhsPTOC Dead zone phase protection (short zone between CTs and
open CBs)
-
•
•
50ST / N DzpEfmPTOC Dead zone earth protection (short zone between CTs and
open CBs)
-
•
•
CTS Current transformer supervision
•
•
•
50BF RBRF Breaker failure protection (LBB)
•
•
•
ISL Isolator discrepancy alarm -
•
•
Fibre optic signalling channel
•
•
•
OptGGIO Digital inputs (according to product) * 8 8/16 16/24
RlyGGIO Output relays (according to product) * 8 8/12 12/16/20
High Break relays (according to product) * 4 4/8
Virtual Digital inputs (via fibre communication) 16 16 16
Virtual Output relays (via fibre communication) 16 16 16
Front communication port (RS232)
•
•
•
Rear communication port (Kbus/EIA(RS)485)
•
•
•
Second Rear communication port (Kbus/EIA(RS)485)
•
-
•
Rear communication port (Ethernet) * Option - Option
Time synchronisation port (IRIG-B) * Option Via CU Via CU
Redundant Ethernet port Option - Option
FnkGGIO Function keys 10 - 10
LedGGIO Programmable tri-colour LEDs 18 - 18
* Refer to the data sheet for model selection

GE P743 Specifications

General

Brand	GE
Model	P743
Category	Relays
Language	English