Pad-mount transformers (outdoor single-block) up to 138 kV / 50 MVA
Pad-mount transformers are outdoor single-block transformers on a foundation, in a closed protected enclosure with high- and low-voltage compartments, intended for cable distribution networks, solar and wind power plants, commercial and industrial facilities
- Voltage
- up to 138 kV; primary insulation class 35 kV, BIL ≤ 200 kV
- Power
- up to 50 MVA; dead-front radial feed 500–3750 kVA
- HV/LV (example)
- 12,470–24,940 V / 480/277 or 208/120 V
- Frequency
- 60 Hz (50 Hz optional)
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Pad-mount transformers are outdoor single-block transformers on a foundation, in a closed protected enclosure with high- and low-voltage compartments, intended for cable distribution networks, solar and wind power plants, commercial and industrial facilities, primarily in markets oriented to ANSI/IEEE standards. Characteristics (manufacturer's catalogue 2019): voltage up to 138 kV, power up to 50 MVA; frequency 60 Hz as standard and 50 Hz optional; insulating liquids: mineral oil, silicone oil or vegetable FR3; voltage regulation with de-energized tap changers (DETC) and on-load tap changers (OLTC); primary winding insulation of class 35 kV with BIL 200 kV and below. Impedance voltage is 2.8–5.0 % for 300–500 kVA and 5.75 % for 750–2500 kVA; for 3000–7500 kVA it is agreed with the manufacturer. A typical range with dead-front radial feed has ratings from 500 to 3750 kVA, HV voltages from 12,470 to 24,940 V and LV 480/277 V or 208/120 V; weight is from 4,600 to 16,000 lb (about 2.1–7.3 t). The dead-front design excludes accessible live parts when the compartment is open, which is important for installation in public places. Standards: ANSI, IEEE, NEMA, IEC. Production takes place at plants with an ISO 9001 quality system; tests are carried out in the company's own institute PT&T. Applications: step-up transformers for solar and wind power inverters, connection of energy storage, cable networks of residential and commercial districts, industrial sites and data centres, where compact outdoor installation without a separate substation building is required. The use of vegetable FR3 oil increases fire safety and reduces environmental risks. Parameters of a specific version are agreed with the manufacturer under the technical specification.
Technical specifications
| Voltage | up to 138 kV; primary insulation class 35 kV, BIL ≤ 200 kV |
|---|---|
| Power | up to 50 MVA; dead-front radial feed 500–3750 kVA |
| HV/LV (example) | 12,470–24,940 V / 480/277 or 208/120 V |
| Frequency | 60 Hz (50 Hz optional) |
| Insulating liquid | mineral oil, silicone oil, FR3 (vegetable) |
| Tap changing | off-circuit (DETC) and on-load (OLTC) |
| Impedance voltage | 2.8–5.0 % (300–500 kVA); 5.75 % (750–2500 kVA) |
| Weight | 4,600–16,000 lb |
| Standards | ANSI, IEEE, NEMA, IEC |
Replacement for
КТП-…/10/0,4, КТПН, КТПБ-35/10, КТПБ-110/10 (block substations); there are no single-block 110 kV units
selected by purpose and main parameters, please confirm with our manager
Request a price and lead time
Pad-mount transformers (outdoor single-block) up to 138 kV / 50 MVA. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
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