Outdoor Type (Onan) - Volt Amp Transformer Limited

Type & Make of Transformer: Outdoor Type (ONAN), Volt Amp Transformer Limited

Normal Continuous Rating: 1000 KVA

Winding Material: Copper

Frequency: 50 Hz

No Load Voltage Ratio: 11 kV / 0.433 kV

Connection HV/LV: Delta / Star

Vector Group: Dyn11

Tapping on HV Side: +5% to +15% @ 1.25% (On Load Tap Changer, OLTC Make: CTR)

Temperature Rise (over 50A C ambient): Oil a 40A C (Thermometer), Winding a 45A C (Resistance method)

Total Loss at 50% Load (75A C): 2.79 kW (Max)

Total Loss at 100% Load (75A C): 7.7 kW (Max)

Impedance at Rated Current (75A C): 5% (Tolerance: +10% to -10%)

Insulation Level: HV a 75 kVp / 28 kV rms, LV a 3 kV rms

Efficiency at 75A C (Unity PF): 50% a 99.45%, 75% a 99.38%, 100% a 99.26%

Efficiency at 75A C (0.8 PF Lag): 50% a 99.31%, 75% a 99.22%, 100% a 99.08%

Regulation at 75A C: Unity PF a 0.739%, 0.8 PF a 3.535%

Reactance at Rated Current & Frequency: 4.962%

Overload Capacity: As per IS 2026 (Part-7)

Applicable Standard: IS 1180, Level-1 (AMND-4)

HV/LV Termination & Orientation: Cable box / Bus duct / 180A

Test Requirements: As per QAP-JN 56002, Volt Amp Transformer Limited