SPECICATION NO. ETI/PSI/144 (12/91) SPECIFICATION FOR ... - rdso

6.1.3. Mimic diagram board (MDB)
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6.1.3.1 A mimic diagram board and its associated mimic driver shall be provided
at the RCC. The MDB shall depict the traction power supply diagram, indicating the
energised/ de-energised condition of sub-sectors of catenary, status of interruptors and
feeder circuit breakers at TSS & FP, SSP and SP.
6.1.3.2 Since all control operations are to be carried out from the key board (s)
provided at the workstation (s), the MDB‘s sole purpose is to give an overall view of the
traction power supply system to the operator. In view of this limited function, the overall
size of the MDB shall be restricted to 3500mm x 750mm x 200mm for depicting 30
controlled stations.
6.1.3.3 Annunciation for controlled stations
For each controlled station an annunciation ―Remote station defective‖
shall be provided on the MDB using an LED.
6.1.3.4 Annunciations for master station equipment
The following annunciations by LEDs shall be provided the MDB:
i) Main system ON
ii) Stand by system ON
iii) Main system defective
iv) Stand by system defective
v) Main UPS sail
vi) Stand by UPS fail
vii) UPS battery low: This shall show up when the UPS
battery voltage falls below 90% of the nominal voltage.
Necessary relays/circuits for this purpose shall form part
of the contract.
viii) 415 V 3-phase ac to UPS fail
6.1.3.5 Other facilities on the MDB
The following facilities shall be provided on the MDB: