Phone260.982.8508
Custom Magnetics, Inc.

Power Generation & Distribution Products

Three Phase: 22/0.433 KV, 50 Hz

Rating KVA Standard NLL(W) LL(W) %Z Efficiency at UPF & 0.5L Temp. rise Weights kgs. Dimensions
  Total Oil L B H
100 IS 2026 400 2300 5 97.37 35 /40° C 915 305 1550 1650 1925
200 IS 2026 650 4000 5 97.73 35 /40° C 1500 390 1600 2300 2050
315 IS 2026 850 5500 5 98.02 50 /55° C 1710 445 1650 1825 2100
630 IS 2026 1100 8500 5 98.5 50 /55° C 2650 590 2450 1725 2375
990 IS 2026 1600 13000 5 98.55 50 /55° C 3420 715 2500 2350 2450
1500 IS 2026 2300 19000 5 98.6 50 /55° C 5350 980 3950 2550 2550
2000 IS 2026 2700 24000 5 98.68 50 /55° C 5880 1120 3600 2675 2750

Three Phase: 33/0.433 KV, 50 Hz

Rating KVA Standard NLL(W) LL(W) %Z Efficiency at UPF & 0.5L Temp. rise Weights kgs. Dimensions
  Total Oil L B H
100 IS 2026 450 2300 5 97.32 35 /40° C 1040 385 1600 1700 2000
200 IS 2026 750 4000 5 97.68 35 /40° C 1660 500 1650 2200 2125
315 IS 2026 900 5700 5 97.95 50 /55° C 1915 565 1700 1875 2200
630 IS 2026 1200 8500 5 98.48 50 /55° C 2905 720 2475 1750 2500
990 IS 2026 1800 13000 5 98.53 50 /55° C 3700 865 2550 2375 2550
1500 IS 2026 2400 19000 5 98.59 50 /55° C 5400 1120 3950 2450 2600
2000 IS 2026 2800 24000 5 98.68 50 /55° C 6330 1280 3600 2550 2800

3 Phase Dry Type & Oil Cool Distribution Transformers
11 KV / 0.433 KV, 50 Hz

Rating KVA Standard NLL(W) LL(W) %Z Efficiency at UPF & 0.5L Temp. rise Weights kgs. Dimensions
  Total Oil L B H
25 IS 2026 80 615 4.5 97.58% 35 /40° C 385 115 910 700 1280
63 IS 2026 180 1235 4.5 97.49% 35 /40° C 626 177 1050 930 1400
100 IS 2026 260 1760 4.5 97.60% 35 /40° C 730 190 1180 850 1425
200 IS 2026 500 2800 4.5 97.52% 35 /40° C 1000 290 1440 1100 1700
315 IS 2026 800 4250 4.5 97.48% 50 /55° C 1430 340 1950 1850 1850
630 IS 2026 970 8000 5 97.58% 50 /55° C 2440 490 2250 2150 2100
990 IS 2026 1400 11500 5 97.61% 50 /55° C 3290 670 2350 2250 2400
1500 IS 2026 2200 17000 5 98.90% 50 /55° C 5300 1100 3950 2100 2750
2000 IS 2026 2500 23000 6.25 98.74% 50 /55° C 5600 1060 3600 2700 2850

Single Phase: 11 KV / 240 V, 50 Hz

Rating KVA Standard NLL(W) LL(W) %Z Efficiency at UPF & 0.5L Temp. rise Weights kgs. Dimensions
  Total Oil L B H
10 IS 1180
IS 2026
50 210 4 98.56% 40 /45° C 190 30 720 560 375
16 IS 1180
IS 2026
75 250 4 98.72% 40 /45° C 210 35 770 590 925
25 IS 1180
IS 2026
68 275 4 98.69% 40 /45° C 237 40 820 620 975

STL Transformers are made under a stringent stage-wise QA plan covering incoming area, production stages and final dispatches using state of the art production and testing facilities. STL possesses a team of qualified and experienced professionals to augment all activities and has an infrastructure and testing facility to manufacture and test transformers up to 33 KV Class and 2 MVA capacities in oil cooled. STL also manufactures and tests Dry Type Transformers up to 1 MVA, 33KV Class as per IS 1171.

Presently, STL has a manufacturing capacity of 200 MVA, with DRY TYPE & FURANACE TRANSFORMERS in its product range. Further capacity expansion is on the anvil. The transformers are type test certified for Temp. Rise, Lightning Impulse Voltage withstand test and short circuit withstand test. These tests have been carried out at ERDA and CPRI.

Fittings:

Silica Gel Breather, Pressure Release Valve*, Cable Box/Bare Bushing on HV and Cable Box/ Bus Duct on LV, WTI*, OTI*, MOG*, Off Load Tap Changer, Fin type Radiators, Lifting Lugs, Mounting Channels and Wheels, Rating and Diagram plate, etc.

STL also has 3 PHASE DRY TYPE TRANSFORMER in its product range. STL has manufactured up to 200 KVA 3 PHASE DRY TYPE TRANSFORMER and has the infrastructure to manufacture and test 3 PHASE DRY TYPE TRANSFORMER up to 1 MVA, 11KV Class.