63 KVA, 11/0.433 KV Distribution Transformer

A 63 KVA, 11/0.433 KV Distribution Transformer is a step-down transformer used in power distribution networks to convert high voltage (11 kV) to low voltage (433V) for commercial, industrial, and residential applications.

Technical Specifications:

1. Rating: 63 KVA
2. Primary Voltage: 11 kV
3. Secondary Voltage: 0.433 kV (433V)
4. Frequency: 50 Hz
5. Phase: 3-Phase
6. Vector Group: Dyn11 
7. Cooling Type: ONAN (Oil Natural Air Natural)
8. Winding Material: Copper/Aluminum
9. Insulation Class: Class A / B / F 
10. Efficiency: ≥98% (As per IS 1180 / IEC Standards)
11. Impedance Voltage: ~4.5% 
12. Tap Changer: Off-load tap changer ±5% (in steps of 2.5%) (Optional as per requirement)

Construction Features:

• Core: High-grade CRGO (Cold Rolled Grain Oriented) steel
• Winding: High-quality insulated copper/aluminum conductors
• Tank: Robust, leak-proof construction with radiator fins for efficient cooling
• Bushings: High-quality porcelain bushings for HV and LV sides
• Cooling Oil: Mineral oil-filled (as per IS 335)
• Protection: HV/LV side surge arresters, Buchholz relay, Oil temperature indicator (Optional)

Applications:

• Used in urban and rural power distribution networks
• Industrial and commercial power supply
• Residential housing complexes
• Agricultural irrigation systems