Alstom SHPM 101, Service Manual

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SERVICE MANUAL R5888C
QUADRAMHO Chapter8
Page 4 of 5
with reset Zone 1 extension. This approach ensures that other features are
retained.
Case connection diagrams:
Single and three phase tripping S10 SHPM101 sheet 7
Three phase tripping only S10 SHPM101 sheet 8
1.7 PM007
If module 4 is: RCL 10 001 070
RCL 10 001 071
RCL 10 001 072
The application requirement for this module call for extra output contacts.
To achieve this, a number of existing contacts have had their function changed.
Normally this change is contained in the software, but on this occasion, it has
been necessary to omit the power swing blocking software and hardware features.
The revived contact arrangement is available with all the standard scheme option
TSN 00 to 09.
1.7.1 Fault locator contacts
Zone 3 is included in the logic for driving FLA, FLB and FLC. This enables phase
information to be provided for faults on the busbars (reverse faults).
The FLN logic closes only for single phase faults. this allows it to be used for
energising the signal receive opto-coupler in scheme 04, when the signalling
channel is not in service. Accelerated trips can now be achieved over the whole
length of the line, for single phase faults.
1.7.2 MCB blocking input opto-coupler
To provide the Zone 1 extension feature and allow the relay to be used with
miniature circuit breakers (mcb’s), a separate opto-coupler input is provided for
each function.
Only a normally open contact (n/o) is provided on the mcb, so the logic has been
inverted. This results in the opto-coupler being energised when the mcb is closed,
ie. continually energised under healthy conditions.
1.7.3 Channel in service opto-coupler
The logic for this opto-coupler has been inverted to become “Channel out of
service”. This is necessary to ensure the trip output logic can provide single phase
tripping, even if the opto-coupler is not wired up. Correct auto-reclose logic is also
retained
Case connection diagrams:
Single and three phase tripping S10 SHPM101.09
Three phase tripping only S10 SHPM101.10