Software
Hardware
Version
Suffix
Date of Issue
Major
Minor
33
C3.9
J or K
January 2008
40
D2.2
J or K
July 2007
40
D2.3
J or K
February 2008
40
D2.5
J or K
October 2008
Relay type: P740 ...
Original
Description of Changes
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.
Addition of the Ethernet/IEC61850-8-1 protocol option
Addition of the Demodulated Irig-B option
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.
The behaviour of the "Out of Sevice" Led is different between
P74xxxxxxxxxx0xx and P74xxxxxxxxxx5xx
The Delta I Algorithm has been removed.
S1
Technical
Compatibility
Documentation
V2.14
P740/EN xx/H65
Patch 33
V2.14
P740/EN xx/H65
Patch 40
V2.14
P740/EN xx/H65
Patch 40
V2.14
P740/EN xx/K96
Patch 40