Enquiry Specification for Wagon Tippler with Side Arm Charger and ...
Enquiry Specification for Wagon Tippler with Side Arm Charger and ...
Enquiry Specification for Wagon Tippler with Side Arm Charger and ...
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<strong>Enquiry</strong> <strong>Specification</strong> <strong>for</strong> <strong>Wagon</strong> <strong>Tippler</strong> <strong>with</strong> <strong>Side</strong> <strong>Arm</strong> <strong>Charger</strong> <strong>and</strong> Associated works<br />
NRO/CON/WT/533<br />
(2) <strong>Wagon</strong> <strong>Tippler</strong> <strong>and</strong> <strong>Side</strong> <strong>Arm</strong> <strong>Charger</strong><br />
(i) Variable Voltage Variable Frequency Converters (AC Drives):<br />
- AC drives shall have communication facility <strong>with</strong> PLCs <strong>for</strong> data transfer<br />
<strong>and</strong> speed reference set point.<br />
- Software of AC drives shall be developed in such a way that after over<br />
voltage or under voltage when the drive trips, the AC drive shall be<br />
automatically resetted <strong>with</strong>out any manual intervention after normalising<br />
of the voltage.<br />
- Remaining features shall con<strong>for</strong>m to General Technical <strong>Specification</strong><br />
(ii) Programmable Logic Controller (PLC) :<br />
- The system shall be complete <strong>with</strong> CPU, I/O racks, memory, key board<br />
<strong>and</strong> monitor. HMI shall depict graphics of various mechanism operations<br />
<strong>and</strong> also provide alarm annunciation system. Spare CPU <strong>with</strong> loaded<br />
software shall be installed in the PLC panel.<br />
- Communication between PLC <strong>and</strong> AC drive shall be possible <strong>for</strong> smooth<br />
operation of the <strong>Tippler</strong>. PLC shall have facility to communicate <strong>with</strong><br />
Despatcher-D1 / Central Control room PLC. All the required hardware<br />
<strong>and</strong> software <strong>for</strong> these communications shall be provided.<br />
- PLC shall per<strong>for</strong>m the following task :<br />
(i) Logic interlock functions, control & supervision of drives &<br />
solenoid valves.<br />
(ii) Automatic sequential operation of various drives.<br />
(iii) Status indication & signaling.<br />
(iv) Fault monitoring & annunciation.<br />
(v) Diagnostic features to recognise <strong>and</strong> display faults.<br />
(vi) Communicate <strong>with</strong> Despatcher-D1 / Central Control room PLC.<br />
PLC input interrogation voltage shall be 230vAC <strong>and</strong> output<br />
voltage 24vDC<br />
- Remaining features shall con<strong>for</strong>m to General Technical <strong>Specification</strong>.<br />
(iii) Control Desk :<br />
- Control desk shall be provided <strong>for</strong> centralised control, monitoring of all<br />
the drives of <strong>Wagon</strong> tippler <strong>and</strong> SAC, including annunciations of all the<br />
faults, over-load trip condition of drives, failure of safety devices, all<br />
faulty conditions, warning conditions, over/under positioning conditions,<br />
over travel conditions etc. Separate <strong>and</strong> independent annunciation <strong>for</strong><br />
each shall be provided instead of group annunciation.<br />
- Control desk shall have suitable nos. of status indication lamps to cover<br />
complete dust suppression system, SAC positions & movements<br />
EPI – New Delhi Volume-2B, Rev.0 Page 24 of 63
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