PROVN OF VOLTAGE STABILIZER AT 66 KVA RECEIVING STN UNDER GE (AF) JAMNAGAR NO 1

Supply, Installation, Testing and Commissioning of Servo controlled voltage stabilizer (Confirming as per BIS: 9815: Part 1: 1994 reaffirmation 2019 latest version) 3-phase, four wire (RYBN) 50Hz, Naturally Oil Cooled, Indoor type, Unbalanced Type, Copper Wound,metallic body powder coated with lifting hooks 02 nos, Digital Display Type, Relay, Free Smooth and Silent Operation with 1st filling of Transformer oil (IS335: 1993 reaffirmed 2005) including the following mentioned fittings , floor mounted with necessary PCC foundation, frame, suitable nut bolts, washer etc with all accessories & necessary connection with lugs alongwith having following specification: (a) Capacity 100 KVA (b) Suitable for unbalanced load and unbalanced input. (c) Input voltage 360V-480V (d) Output voltage stabilized at any designed/desired voltage 415V ± 1% (Adjustable) (e) Rated frequency 50 Hz (f) No distortion in wave form (g) Response time not to exceed 20 milli seconds (h) Sensitivity (±)1% (j) Rate of correction 6 Volt/second for single phase and 20 Volt/second for phase to phase (k) Efficiency more than 95% (l) Type of load: 3 phase, unbalanced type (m) Digital display Voltmeter/Ampmeter with multi functional meter (n) Class of insulation -Class F (o) Mode of operation Auto and Manual (p) Winding temperature rise-Max55 degree C (10 degree above operation temp) (q) Transformer oil IS 335 marked (r) Core-CRGO M4 Grade/CRNO (Cold Roll Grain Oriented)/ Cold rolled Non oriented) (s) Auto Transformer(variac)100% Copper wound Electroyte Grade (t) Losses as per IS Norms (u) Power Factor Not less than 0.95. Protection:- 1 .Over load /Short circuit protection 2. High /Low voltage cut off 3. By pass arrangement in case of emergency 4. Single phase sequence change protection/phase fail protection.

Supply, Installation, Testing and Commissioning of Servo controlled voltage stabilizer (Confirming as per BIS: 9815: Part 1: 1994 reaffirmation 2019 latest version) 3-phase, four wire (RYBN) 50Hz, Naturally Oil Cooled, Indoor type, Unbalanced Type, Copper Wound,metallic body powder coated with lifting hooks 02 nos Digital Display Type, Relay Free Smooth and Silent Operation with 1st filling of Transformer oil (IS335: 1993 reaffirmed 2005) including the following mentioned fittings , floor mounted with necessary PCC foundation, frame suitable nut bolts, washer etc with all accessories & necessary connection with lugs alongwith having following specification: (a) Capacity 150 KVA (b) Suitable for unbalanced load and unbalanced input (c) Input voltage 360V-480V (d) Output voltage stabilized at any designed/desired voltage 415V ± 1% (Adjustable) (e) Rated frequency 50 Hz (f) No distortion in wave form (g) Response time not to exceed 20 milli seconds (h) Sensitivity (±)1% (j) Rate of correction 6 Volt/second for single phase and 20 Volt/second for phase to phase (k) Efficiency more than 95% (l) Type of load: 3 phase, unbalanced type (m) Digital display Voltmeter/Ampmeter with multi functional meter (n) Class of insulation -Class F (o) Mode of operation Auto and Manual (p) Winding temperature rise-Max55 degree C (10degree above operation temp) (q) Transformer oil IS 335 marked (r) Core-CRGO M4 Grade/CRNO (Cold Roll Grain Oriented)/ Cold rolled Non oriented) (s) Auto Transformer(variac)100% Copper wound Electroyte Grade (t) Losses as per IS Norms (u) Power Factor Not less than 0.95. Protection:- 1 .Over load /Short circuit protection 2. High /Low voltage cut off 3. By pass arrangement in case of emergency 4.Single phase sequence change protection/phase fail protection

Supply, Installation, Testing and Commissioning of Servo controlled voltage stabilizer (Confirming as per BIS: 9815: Part 1: 1994 reaffirmation 2019 latest version) 3-phase, four wire (RYBN) 50Hz, Naturally Oil Cooled, Indoor type, Unbalanced Type, Copper Wound,metallic body powder coated with lifting hooks 02 nos Digital Display Type, Relay Free Smooth and Silent Operation with 1st filling of Transformer oil (IS335: 1993 reaffirmed 2005) including the following mentioned fittings , floor mounted with necessary PCC foundation, frame suitable nut bolts, washer etc with all accessories & necessary connection with lugs alongwith having following specification: (a) Capacity 200 KVA (b) Suitable for unbalanced load and unbalanced input (c) Input voltage 360V-480V (d) Output voltage stabilized at any designed/desired voltage 415V ± 1% (Adjustable) (e) Rated frequency 50 Hz (f) No distortion in wave form (g) Response time not to exceed 20 milli seconds (h) Sensitivity (±)1% (j) Rate of correction 6 Volt/second for single phase and 20 Volt/second for phase to phase (k) Efficiency more than 95% (l) Type of load: 3 phase, unbalanced type (m) Digital display Voltmeter/Ampmeter with multi functional meter (n) Class of insulation -Class F (o) Mode of operation Auto and Manual (p) Winding temperature rise-Max55 degree C (10degree above operation temp) (q) Transformer oil IS 335 marked (r) Core-CRGO M4 Grade/CRNO (Cold Roll Grain Oriented)/ Cold rolled Non oriented) (s) Auto Transformer(variac)100% Copper wound Electroyte Grade (t) Losses as per IS Norms (u) Power Factor Not less than 0.95. Protection:- 1 .Over load /Short circuit protection 2. High /Low voltage cut off 3. By pass arrangement in case of emergency 4.Single phase sequence change protection/phase fail protection

Supply, Installation, Testing and Commissioning of Servo controlled voltage stabilizer (Confirming as per BIS: 9815: Part 1: 1994 reaffirmation 2019 latest version) 3-phase, four wire (RYBN) 50Hz, Naturally Oil Cooled, Indoor type, Unbalanced Type, Copper Wound,metallic body powder coated with lifting hooks 02 nos Digital Display Type, Relay Free Smooth and Silent Operation with 1st filling of Transformer oil (IS335: 1993 reaffirmed 2005) including the following mentioned fittings , floor mounted with necessary PCC foundation, frame suitable nut bolts, washer etc with all accessories & necessary connection with lugs alongwith having following specification: (a) Capacity 250 KVA (b) Suitable for unbalanced load and unbalanced input (c) Input voltage 360V-480V (d) Output voltage stabilized at any designed/desired voltage 415V ± 1% (Adjustable) (e) Rated frequency 50 Hz (f) No distortion in wave form (g) Response time not to exceed 20 milli seconds (h) Sensitivity (±)1% (j) Rate of correction 6 Volt/second for single phase and 20 Volt/second for phase to phase (k) Efficiency more than 95% (l) Type of load: 3 phase, unbalanced type (m) Digital display Voltmeter/Ampmeter with multi functional meter (n) Class of insulation -Class F (o) Mode of operation Auto and Manual (p) Winding temperature rise-Max55 degree C (10degree above operation temp) (q) Transformer oil IS 335 marked (r) Core-CRGO M4 Grade/CRNO (Cold Roll Grain Oriented)/ Cold rolled Non oriented) (s) Auto Transformer(variac)100% Copper wound Electroyte Grade (t) Losses as per IS Norms (u) Power Factor Not less than 0.95. Protection:- 1 .Over load /Short circuit protection 2. High /Low voltage cut off 3. By pass arrangement in case of emergency 4. Single phase sequence change protection/phase fail protection.

Supply, Installation, Testing and Commissioning of Servo controlled voltage stabilizer (Confirming as per BIS: 9815: Part 1: 1994 reaffirmation 2019 latest version) 3-phase, four wire (RYBN) 50Hz, Naturally Oil Cooled, Indoor type, Unbalanced Type, Copper Wound,metallic body powder coated with lifting hooks 02 nos Digital Display Type, Relay Free Smooth and Silent Operation with 1st filling of Transformer oil (IS335: 1993 reaffirmed 2005) including the following mentioned fittings , floor mounted with necessary PCC foundation, frame suitable nut bolts, washer etc with all accessories & necessary connection with lugs alongwith having following specification: (a) Capacity 300 KVA (b) Suitable for unbalanced load and unbalanced input (c) Input voltage 360V-480V (d) Output voltage stabilized at any designed/desired voltage 415V ± 1% (Adjustable) (e) Rated frequency 50 Hz (f) No distortion in wave form (g) Response time not to exceed 20 milli seconds (h) Sensitivity (±)1% (j) Rate of correction 6 Volt/second for single phase and 20 Volt/second for phase to phase (k) Efficiency more than 95% (l) Type of load: 3 phase, unbalanced type (m) Digital display Voltmeter/Ampmeter with multi functional meter (n) Class of insulation -Class F (o) Mode of operation Auto and Manual (p) Winding temperature rise-Max55 degree C (10degree above operation temp) (q) Transformer oil IS 335 marked (r) Core-CRGO M4 Grade/CRNO (Cold Roll Grain Oriented)/ Cold rolled Non oriented) (s) Auto Transformer(variac)100% Copper wound Electroyte Grade (t) Losses as per IS Norms (u) Power Factor Not less than 0.95. Protection:- 1 .Over load /Short circuit protection 2. High /Low voltage cut off 3. By pass arrangement in case of emergency 4. Single phase sequence change protection/phase fail protection.

Supply, Installation, Testing and Commissioning of Servo controlled voltage stabilizer (Confirming as per BIS: 9815: Part 1: 1994 reaffirmation 2019 latest version) 3-phase, four wire (RYBN) 50Hz, Naturally Oil Cooled, Indoor type, Unbalanced Type, Copper Wound,metallic body powder coated with lifting hooks 02 nos Digital Display Type, Relay Free Smooth and Silent Operation with 1st filling of Transformer oil (IS335: 1993 reaffirmed 2005) including the following mentioned fittings , floor mounted with necessary PCC foundation, frame suitable nut bolts, washer etc with all accessories & necessary connection with lugs alongwith having following specification: (a) Capacity 400 KVA (b) Suitable for unbalanced load and unbalanced input (c) Input voltage 360V-480V (d) Output voltage stabilized at any designed/desired voltage 415V ± 1% (Adjustable) (e) Rated frequency 50 Hz (f) No distortion in wave form (g) Response time not to exceed 20 milli seconds (h) Sensitivity (±)1% (j) Rate of correction 6 Volt/second for single phase and 20 Volt/second for phase to phase (k) Efficiency more than 95% (l) Type of load: 3 phase, unbalanced type (m) Digital display Voltmeter/Ampmeter with multi functional meter (n) Class of insulation -Class F (o) Mode of operation Auto and Manual (p) Winding temperature rise-Max55 degree C (10degree above operation temp) (q) Transformer oil IS 335 marked (r) Core-CRGO M4 Grade/CRNO (Cold Roll Grain Oriented)/ Cold rolled Non oriented) (s) Auto Transformer(variac)100% Copper wound Electroyte Grade (t) Losses as per IS Norms (u) Power Factor Not less than 0.95. Protection:- 1 .Over load /Short circuit protection 2. High /Low voltage cut off 3. By pass arrangement in case of emergency 4. Single phase sequence change protection/phase fail protection.

Supply, installation, testing & commissioning of transformer of capacity 500 KVA step down outdoor type copper wounded 11/0.433 KV (at no load) AC 3 phase 50HZ on secondary side double wound oil immersed naturally all air cooled (ONAN COOLED) with external cooling tubes /radiator ,delta connected as on primary and star connected with natural brought on secondary) side and having tapping at (±) 2.5%,(±) 5% (±) 7.5% to be changed by hand operated OFF LOAD tap changing gear .The maximum temperature rise should not exceed 45 degree centigrade in oil and 50 degree centigrade in HV/ LV winding when measured by the resistance method after continuous full load run in ambient temperature the transformer shall confirming to IS 1180 Part-I: confirming to as per latest amendment, EEL-Level III ,( Total losses @ 50% load - 1354 watt, total losses @ 100% load -3909 watt) and comprising of following accessories complete all as specified and as directed:- (a) HV side Cable box with 03 Nos porcelains HV bushing complete with bushing rods and nuts washers and cable glands suitable for reception of out 3 core 95 Sqmm cable 3 runs, HT Cable 11000 Volts grade XLPE insulated heavy duty including gland complete. (b) 01 No cable end box on LV secondary side consisting of 04 Nos porcelain bushing ( One No Neutral and Three No for phase connected bushing) with bushing rods and nuts washers and cable glands suitable for reception of out 3.5 core 400 Sqmm cable 3 runs, LT 1100 Volts grade XLPE insulated heavy duty including gland joint complete. (c) Oil conservator with filter type drain valve and oil level gauge.(d) Dehydrating breather with first filling of dehydrating agent. (e) Explosive vent. (f) Thermometer pocket including temperature gauge. (g) Two earthing terminals on tank body to facilitate fixing of 32x6mm GI strips. (h) One No thermometer dial type vapour pressure type having range 0-120 degree centigrade with maximum temperature indicator and re-setting device to maximum temperature including needle of temperature gauge: Max reading painted terminal. (j) Oil level gauge. (k) Oil drain filter valve. (l) Oil filling hole on top cover with plug. (m) Air release valve/plug. (n) 4 Nos plain solid cast steel detachable rollers. (o) First fill of transformer oil conforming to relevant ISI and tested upto 60 KV dielectric strength. (p)Two No lifting hook at side of transformer. (q) 1Nos Breather duly filled with silicajel crystals capacity 1000g (r) Rating plate with terminal plate. (s) 04 Nos Cast Iron Wheels. Note:- (i) The erection, installation of transformer shall be done as per Term of Manufacturers SOP & Testing certificate to this office shall be submitted by contractor duly signed by manufacturer. (ii) Testing of Transformer will be carried out by the rep of AO, required T&P necessary arrangements for testing to be provided by the contractor deemed to be included in the quoted rate.

Material and labour for provision of earthing complete with copper earth plate electrode 600 mm x 600 mm x 3 mm thick buried directly in ground (earth pit not less than 2.25 m deep below normal ground level) with top edge of the plate not less than 1.5 m deep below normal ground connected to Copper strip 20x3.15 mm by means of bolts, nuts, check nuts and washer of copper, watering pipe of 20 mm bore galvanised iron medium grade and 40 mm bore galvanised iron light grade for earth strip protection including all excavation, earth work in any type of soil, PCC pit in PCC 1:2:4 type B-1 and RCC 1:2:4, type B1 for precast chamber cover 50 mm thick, reinforced with welded steel wire fabric or XPM Jali (weight not less than 4.00 Kg / sqm), with charcoal, salt, funnel complete all as shown in the electrical plate No 3 of SSR part –I and testing on completion, including necessary excavation and earthwork in any type of soil, returning, filling in approved soil and disposal of surplus soil to a distance not exc 50m complete all as specified and as directed. Note : (i) Earth result after installation completely should be less than 5 Ohm .(ii) Quoted rates shall be deemed to include for earth strip with protection pipe of 7.5 M length. (ii) PCC chamber shall be constructed at least 1.5 mtr away from the earth electrode and pipe for watering shall be provided in slanting manner.

Supply and laying Copper strip 20 x 3mm with saddles and fixing screws etc complete all as specified and as directed.

Supply, laying, jointing, commissioning and testing cable LT XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor suitable for earth system of 120 sqmm 3.5 core cross sectional size ISI marked as per IS 7098 part I laid in trenches/ laid under floors/ laid under ducts or fixed on poles etc, complete all as specified and as directed.