GE P742

Firmware and Service Manual P74x/EN VH/Na7
Version History
MiCOM P741, P742, P743
(
VH) 16-
3
VH
Relay type: P740 …
Software
Version
Hardware
Suffix
Original
Date of Issue
Description of Changes
S1
Compatibility
Technical
Documentation
Major Minor
33
C3.9 J or K January 2008
 The status of the trip relays 1, 2, 3 is stored in BBRAM even if
the “Trip Latched” function is disabled in the column “CB
Control”
 The status of the trip relays 1, 2, 3 latched in the PU will not
open in case of loss of communication with the CU
 The CU->PU signals are not received in the PU if there is no
CT in the topology of this PU (PU in charge of an isolator bus
section)
 The Control Input values are correct after the reboot of the
protection.
V2.14
Patch 33
P740/EN xx/H65
40
D2.2 J or K July 2007
 Addition of the Ethernet/IEC61850-8-1 protocol option
 Addition of the Demodulated Irig-B option
V2.14
Patch 40
P740/EN xx/H65
40
D2.3 J or K February 2008
 The status of the trip relays 1, 2, 3 is stored in BBRAM even if
the “Trip Latched” function is disabled in the column “CB
Control”
 The status of the trip relays 1, 2, 3 latched in the PU will not
open in case of loss of communication with the CU
 The CU->PU signals are not received in the PU if there is no
CT in the topology of this PU (PU in charge of an isolator bus
section)
 The Control Input values are correct after the reboot of the
protection.
V2.14
Patch 40
P740/EN xx/H65
40
D2.5 J or K October 2008
 The behaviour of the “Out of Sevice” Led is different between
P74xxxxxxxxxx0xx and P74xxxxxxxxxx5xx
 The Delta I Algorithm has been removed.
V2.14
Patch 40
P740/EN xx/K96