1. Product Introduction
2. Compliance & Standards
| Standard | Description |
| IEEE C57.12.00 | General requirements for liquid-immersed transformers |
| IEEE C57.12.28 | Enclosure integrity for pad-mounted equipment |
| IEEE C57.12.34 | Requirements for self-cooled PMTs (≤5 MVA, ≤34.5 kV) |
| IEEE C57.12.35 | Bar coding for distribution transformers |
| IEEE C57.12.37 | Electronic reporting of test data |
| IEEE C57.91 | Loading guide for mineral oil transformers (≤100 MVA) |
3. Construction & Design
Enclosure & Accessibility
✔ 180° Swing Doors – Easy access for maintenance
✔ Self-Aligning Latches – Compliant with IEEE C57.12.28
✔ Compartment Separation – HV & LV sections divided by a steel barrier
Cooling & Insulation
Fluid Options:
Temperature Limits:
Avg. winding rise: ≤75°C
Hot-spot rise: ≤90°C
Protection & Switching
Bay-O-Net Fuses – Load-break rated, with oil drip shield
Tap Changer – Hook-stick operable (accessible positioning)
Internal Fusing – Cartridge fuses where Bay-O-Net is unavailable
4. Key Benefits
✅ Cost-Effective – Lower installation & maintenance costs
✅ Enhanced Safety – No exposed conductors, reduced fire risk
✅ Eco-Friendly Option – FR3 biodegradable fluid available
✅ Durability – Corrosion-resistant, weatherproof enclosure
5. Typical Applications
Urban Power Distribution (street-side, greenbelts)
Industrial Parks (compact substations)
Renewable Energy (solar/wind farm step-down)
Commercial Complexes (underground cable networks)
TECHNICAL DATASHEET FOR 500KVA PADMOUNT TRANSFORMER
ITEM | ZGSB-500/4.16/0.24(0.480) |
Manufacturer | Pearl Electric Co., Ltd. |
Standard | IEEE C57 |
Transformer Type | Pad-mount Transformer |
Primary Voltage | 4.16KV(H.V) |
Secondary Voltage(L.V) | 0.24KV(L.V) |
Rated Rating | 500KVA(H.V)/500KVA(L.V) |
Temperature Rise | 65°C(H.V)/65°C(L.V1)/ 65°C(L.V2) |
Impedance (Uk=) | 4% at 500KVA |
Insulation Class | A-Class |
Phase | 3 phase |
Frequency | 60hz |
Cooling Way | ONAN |
Insulation Liquid | Mineral Oil |
Winding Material | Aluminum |
Core Material | STAINLESS STEEL |
Vector Group | Dyn1 |
FITINGS AND ACCESSORIES
H.V BUSHING INSERT
L.V BUSHING (X)
L.V BUSHING
DE-ENERGIZED TAP CHANGER(DETC)
OIL LEVEL GAUGE
OIL TEMPERATURE INDICATOR
PRESSURE RELIEF VALVE
PRESSURE VACUUM GAUGE
RADIATORS
BAY-O-NET FUSE
OIL UPPER FILL PIUG
OIL DRAIN VALVE WITH SAMPLING VALVE
GAS SAMPLE VALVE
PAD LOCKABLE DOOR HANDLE
