AHMEDABAD DIVISION TENDER DOCUMENT ... - Western Railway
AHMEDABAD DIVISION TENDER DOCUMENT ... - Western Railway
AHMEDABAD DIVISION TENDER DOCUMENT ... - Western Railway
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• Single phase Auxiliary Power Supply with working range of 180 to 265 VAC phase to<br />
Neutral.<br />
• Parameter Measurement<br />
o Phase wise Voltage<br />
o Phase wise Current<br />
o Phase wise Power Factor<br />
o Phase wise Active Power<br />
o Phase wise Reactive Power<br />
o Phase wise Apparent Power<br />
o Neutral Current<br />
o Frequency<br />
o Total Active Power<br />
o Total Reactive Power<br />
o Total Apparent Power<br />
o Total Active Energy<br />
o Total Reactive Energy<br />
o Total Apparent Energy<br />
3. 3 Specifications for GPRS Modem<br />
• Dual Band E-GSM/GPRS 900/1800 MHz<br />
• GPRS multi-slot class 10<br />
• TCP/IP stack access via AT commands<br />
3.4 Specifications for Power Supply and Battery for EMCS<br />
The Power Supply for EMCS unit should meet following minimum requirements<br />
• Operating voltage 140VAC – 315VAC Phase to Neutral, 240VAC-550VAC phase to<br />
phase.<br />
• Power supply should work with neutral with any one phase, without neutral using any<br />
two phases.<br />
• Surge Protection up to 6KV<br />
• Protection against faults like neutral missing/weak, phase to phase shorting<br />
• 12V and 24V DC Supply output for sensor conditioning Low Battery Indication during<br />
power failure.<br />
• Fuses for Protection during faults and Fire.<br />
3.5 Specifications for EMCS Unit Enclosure<br />
• The EMCS unit should have a metal Enclosure suitable for outdoor installations.<br />
• All Energy Meters and communication circuits should be housed in a single enclosure.<br />
• The Enclosure should have provision for Wall mounting.<br />
[ Tenderer ] [ Page 35of 44 ] [For Sr.DEE/ADI ]
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