P74x/EN VH/Na7 Firmware and Service Manual
Version History
(VH) 16-
2
MiCOM P741, P742, P743
Relay type: P740 …
Software
Version
Hardware
Suffix
Original
Date of Issue
Description of Changes
S1
Compatibility
Technical
Documentation
Major Minor
32
C3.7 J or K Jan 2007
Spurious error codes does not appear any more during power
up of the P741
The Ethernet board and the Coprocessor board are
compatible
The thresholds ID>2, IDCZ>2 or IBiasph> can be set higher
than 6kA
Display of MEASUREMENT 2 is MEASUREMENT 2 in
Russian language.
V2.13
Patch 32
P740/EN xx/F44
33
C3.8 J or K Apr 2007
First events following power up are tagged with the right date
& time
When using default PSL ,there is a DR after a 50BF backtrip
through an opto input of the CU
The latched Function Key DDB signals are correct on relay
power up
Uncompressed Disturbance Record Pre-trigger is calculated
correctly
When using S1 to connect to relay and then activate Settings
group by right clicking on the group, relay does not reboot
If the time delay of the overcurrent protection in PU is set to
0ms, then the overcurrent protection does not mal-trip during
its power on.
V2.13
Patch 33
P740/EN xx/F45
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