Page 277 - IRSEM_Main Book

Example of Fault
Fault Name Ref: Fault Information Momentary Confirmed
Message
The time difference between signal approach track circuit
Late Lowering of Home down and signal HECR/DECR/HHECR/COECR Up time is Late Operation of
36 RDSO M
signal more than set time. Time difference to be displayed in case S1 Home Signal
signal is cleared late compared to set time.
Premature
37 Premature Operation of RDSO If LCPR Dn before DR/DECR Dn and SR is Up. C Operation of Block
Double Line Block to TOL
Instrument
Possible in case the design of circuit is such that route Late Closing of LC-
gets locked after operation of the signal before gate M
38 Late Closure of LC Gate RDSO 131 Gate in the
closing and the signal clears as soon as the gate is Route S1-S3
closed.
At the time of COECR (input1) (triggering) Up, if COJSLR S1A Calling on
39 Calling On Operation MM
(input2) is in up state then it is Calling On Operation. operation

In between ASR (input1) Down to Up if JSLR (input2)
Operated then it is Emergency Route Release. ASR Up is
triggering (or) GNR (input1) Up, UNR (input2) Up S1-S2 Emergency
40 Emergency Route Released OM
EUUYNR (input3) Up after given time interval if ASR Route Released
(input4) Up then it is Emergency Route Released.GNR,
UNR, EUUYNR are triggerings.

S1-S2 Emergency
41 Emergency Sub Route If EUYNR (input1) Up and WNR (input2) Up then it is
OM Sub Route
Released Emergency Sub Route Released. Both are triggering.
Released

42 Emergency Overlap If UNR (input1) is Up and if OVYNR (input2) Up then it is S1-S2 Emergency
Emergency overlap cancellation. Both are triggering OM Overlap
Cancellation
signals. Cancellation

Chapter 11: Dataloggers and Predictive Maintenance Systems Page 233 of 535