P74x/EN VH/Na7 Firmware and Service Manual
Version History
(VH) 16-
4
MiCOM P741, P742, P743
Relay type: P740 …
Software
Version
Hardware
Suffix
Original
Date of Issue
Description of Changes
S1
Compatibility
Technical
Documentation
Major Minor
41
D3.1 J or K February 2008
Initial software release with: the second rear port & interrupt
driven interMiCOM for the P741 and P743 and PSL
Enhancement Positional Data and SR Latch Gates
V2.14
Patch 41
P740/EN xx/I76
42
D4.0 J or K March 2008
Initial software release with the Addition of the Px40 Remote
Read Only Mode (allow or block the modification of the
settings & the commands via a rear port)
V2.14
Patch 42
P740/EN xx/J86
51
E2.0 K Jan 2010
Hardware:
P742/P743: new options with 4 or 8 high break relays, 8 or 16
outputs and 8, 16 or 24 inputs,
P741/P743: Redundant Ethernet board in option
Software:
No blocking mode” of a zone in case of circuitry fault added.
The differential current can be set in order to display 0A when
current is not significative.
External voltage criteria:
– CU logic, VT connected to the bus, with two bus section
included in the current node; a voltage criteria will confirm a
fault detection,
– PU logic, VT connected to the line, with some Pus
connected to a P923; The voltage criteria can block a PU.
the 87BB trip time (CU & PU) can be delayed with a settable
time delay.
the 200ms drop-off timer in the Central Unit has been replaced
by a 200ms dwell timer.
V2.14
V3.1 (studio)
Patch 42
P740/EN xx/Lxx
To Next Page
Loading...
