MID/AN/40

Providing, Fitting, Testing and commissioning of 150 KVA voltage stabilizer with other allied works at LIS Manwa. The job includes Providing, Fitting, Testing and Commissioning of 150 KVA 3-phase manually operated copper wound oil cooled voltage stabilizer conforming to relevant IS Code at LIS Manwa suitable for operation on unbalanced input voltage range and balanced output voltage as mentioned below for 3-phase A.C supply. The stabilizer shall be copper wound and the complete unit should be in steel case enamel painted and fitted with steel wheel rollers for easy portability The other detailed specifications are as under: - Capacity: 150 KVA Input Voltage: 300 - 470 Volts Output Voltage: 415 + 5% V Frequency:50+3%Hz 1. Core: The core should be of first quality of CRGO Silicon steel. 2. Transformer oil: The transformer oil to be used has to be ISI Marked conforming to IS 335 with latest amendments.3. Copper conductor: The conductor should be 99.95% electrolytic copper. 4. Container Gauge: The quantity of transformer oil used and the size of container should be mentioned and sheet used for manufacture of voltage stabilizer should be 16 SWG and gauge of the sheet used for fabrication of panel should be 16/18 SWG. 5. Instruments: The voltage stabilizer shall be fitted with MCCB, Voltmeters (for both input and output voltage), Ampere meter, selector switches, indicator lamps, high voltage cut off relay, earth fault relay, single phase voltage preventor cut off alarm. The MCCB/fuses should be of ISI make. The relays shall be ISI make. Similarly, voltmeter, ammeter, selector switches and indicator lamps shall be of ISI make. 6. Bypass Switch: The equipment shall be provided with a bye pass switch of suitable capacity of reputed ISI make. 7. Rotary Switch: The Rotary Switches provided to adjust the output voltage of all the 03 phases should be of suitable rating and reputed ISI make and of heavy duty to withstand all the tests and working load. The rotary switch should have 8 steps with 02 steps down, 05 steps up and step No. 3 for line voltage. 8. Terminal block: Terminal block for input and output connections should be of a reputed ISI make and meant for heavy duty. 9. Characteristic Features: The three phase Manually operated copper wound oil cooled voltage stabilizers shall have the following characteristic features: - i. Continuous duty performance at ambient temperature 2oC to 55 oC. ii. Stable and effective under system power factor and frequency fluctuation as well as overload upto 15% and under load upto 50% of the connected load. iii. Low internal impedance. iv. Negligible wave form distortion during starting under operation and stopping conditions. v. Accommodate the effect of higher starting current and should be able to recover from the shock. vi. No over shooting or hunting. vii. Negligible phase shift ensuring no change in system power factor. viii. The capacity of oil tank should be indicated. ix. The stabilizer shall have: a) Suitable breather. b) Leak proof de-sledging and drain cock for transformer oil. c) Lifting hooks provided at suitable positions for handling of the equipment. d) Oil gauge for monitoring level of transformer oil. x. The equipment shall be designed and manufactured ensuring the safety requirements as envisaged in IS: 8447 and IS: 302 both with latest amendments. xi. The stabilizer should be provided with suitable arrangement to avoid any seepage of water into the voltage stabilizer during storage / handling. 10. Installation & Commissioning: The firm shall get the stabilizer installed inside the pump Room at a suitable place by engaging technically skilled persons. Testing first on idle load and then on full load under the supervision of firms technically skilled persons and commissioning. 11. Testing: The testing of voltage stabilizers shall be conducted as per IS: 8447 of 1989 and IS: 302. The tests to be conducted at the manufacturers facility and test certificate to be provided to the department at the time of installation. 12. Painting: Painting shall be done on voltage stabilizer in steel grey or light blue shade. 13. Marking: Stabilizer shall be marked with manufacturer’s name and trade mark on the plate fitted on the stabilizer indicating rating in KVA, range of input and output voltage, rated output current, frequency, number of phases, type of load viz. unbalanced input and balanced load, quantity of transformer oil and also the reference to the IS: standard. The job includes shifting of new voltage Stabilizer of 150 KVA capacity from manufacturer’s workshop to LIS Manwa by way of loading of the stabilizer into mechanical transport by mechanical crane and manual labour, carriage to roadside near LIS Manwa on mechanical transport, unloading by mechanical crane and manual labour outside the pump house. The job includes cost of hire charges of crane, tools and tackles and engagement of skilled and semi-skilled labour. The complete job also includes making of input and output electrical connections from new voltage stabilizer to control panel. Providing and fitting of aluminium cable single core un armoured of 150 sq mm of length 20 meters of of any reputed make conforming to relevant ISO/ISI standards. The cable should be of standard manufacture like Havells, Polycab, KEI etc. Providing / fitting of new thimbles duly crimped and taped. Complete job includes cost of 150KVA Voltage stabilizer, cost of other required material, skilled/semiskilled labour charges, hire charges of crane, tools and tackles etc., and all types of transportation charges. Complete Job