Fabrication, installation, testing and commissioning of 100 HP LT control panels and allied works at Pumping station Rajpura and Bakshi Nagar under District Capex 2021-22.

Amount

Fabrication, installation, testing and commissioning of LT control panel 415 volts, AC-3 phase, 50 Hz for 100 HP motor at pumping station Rajpura. The panel shall be dust and vermin proof fabricated out of 14/16 SWG CR sheet supported on MS angle of suitable size and provision for fixing it on the ground / wall with the help of foundation bolts. The panel should be sturdy enough for vibration free operation and should be equipped with suitable locking / sealing arrangements. The structure should be provided suitable entry and exit holes for incoming and outgoing cables. The panel should be given two coats of anti rust primer and two coats of steel grey enamel paint. The panel should have equipped with following components / features :- 1. MCCB :- The panel should be fitted with an MCCB of 250 Amps., 1 No. voltmeter, 1 No. ammeter, alongwith a set of CT’s, one No. VSS, one No. ASS and a set of RYB indicators at incoming side. 2. Star Delta starter:- The panel should be fitted with a fully automatic star delta starters comprising of air break contactors 3 Nos. (MNX – 110 – 2 Nos. and MNX-95 -1 No. (2 for main and delta supply, 1 No. timer air break contactor for star operation), 1 No. timer for change over the supply of motor from star to delta, 2 nos. push buttons for start and stop operation of motor, 1 Nos. indicator, 1 No. MCB 2 Amps. for the protection of internal control wiring, a neat and clean internal control wiring should be made with flexible copper cables to complete the star delta circuit of outgoing supply. 3. Protection devise / fault analyzer :- A protections devices / fault analyzer shall be fitted with the panel with capability to: a) protect the motor by isolating the power supply of motor by de-energizing the starter / panel from following electromechanical faults which may otherwise damage the motor windings:- i. Voltage related fault :- Single phasing, under voltage, unbalance voltage. ii. Current related fault :- Over current / load, dry running, unbalance current / load, earth leakage, short circuiting. iii. Mechanical fault :- Locked rotor, broken shaft. b) Display line current of RYB phase and also line voltage of RY and YP phase. c) Display and record trip counts and indicate trip status for over load, under load, single phase, unbalance, earth faults, earth voltage, under voltage respectively. d) Analyze: Display and records No. of operation and duration of motor running. 4. Bi metal overload relay :- A bimetal over load relay of suitable range should be fitted with in the starter as an extra protection to protect the motor in case of failure of fault analyzer with an isolation / bye pass switch to bye pass the fault analyzer. The panel shall be commissioned and tested after making all electrical connections on full load. Complete job.

Fabrication, installation, testing and commissioning of LT control panel 415 volts, AC-3 phase, 50 Hz for 100 HP motor at pumping station Bakshi Nagar. The panel shall be dust and vermin proof fabricated out of 14/16 SWG CR sheet supported on MS angle of suitable size and provision for fixing it on the ground / wall with the help of foundation bolts. The panel should be sturdy enough for vibration free operation and should be equipped with suitable locking / sealing arrangements. The structure should be provided suitable entry and exit holes for incoming and outgoing cables. The panel should be given two coats of anti rust primer and two coats of steel grey enamel paint. The panel should have equipped with following components / features :- 1. MCCB :- The panel should be fitted with an MCCB of 250 Amps., 1 No. voltmeter, 1 No. ammeter, alongwith a set of CT’s, one No. VSS, one No. ASS and a set of RYB indicators at incoming side. 2. Star Delta starter:- The panel should be fitted with a fully automatic star delta starters comprising of air break contactors 3 Nos. (MNX – 110 – 2 Nos. and MNX-95 -1 No. (2 for main and delta supply, 1 No. timer air break contactor for star operation), 1 No. timer for change over the supply of motor from star to delta, 2 nos. push buttons for start and stop operation of motor, 1 Nos. indicator, 1 No. MCB 2 Amps. for the protection of internal control wiring, a neat and clean internal control wiring should be made with flexible copper cables to complete the star delta circuit of outgoing supply. 3. Protection devise / fault analyzer :- A protections devices / fault analyzer shall be fitted with the panel with capability to: a) protect the motor by isolating the power supply of motor by de-energizing the starter / panel from following electromechanical faults which may otherwise damage the motor windings:- i. Voltage related fault :- Single phasing, under voltage, unbalance voltage. ii. Current related fault :- Over current / load, dry running, unbalance current / load, earth leakage, short circuiting. iii. Mechanical fault :- Locked rotor, broken shaft. b) Display line current of RYB phase and also line voltage of RY and YP phase. c) Display and record trip counts and indicate trip status for over load, under load, single phase, unbalance, earth faults, earth voltage, under voltage respectively. d) Analyze: Display and records No. of operation and duration of motor running. 4. Bi metal overload relay :- A bimetal over load relay of suitable range should be fitted with in the starter as an extra protection to protect the motor in case of failure of fault analyzer with an isolation / bye pass switch to bye pass the fault analyzer. The panel shall be commissioned and tested after making all electrical connections on full load. Complete job.

PERFECT ELECTRICAL WORKS

M/S RAGHUNATH MECHANICAL AND ELECTRICAL ENGINEERING WORKS

NATIONAL ELECTRO-MECH COMPANY