Get a quote ↗PROJECT CONFIGURATION / ENGINEERING REVIEW
A BESS transformer interfaces the AC side of the Power Conversion System (PCS) with the grid. Review charging and discharging duty, bidirectional power flow and converter compatibility. The battery DC circuit connects through the PCS, not directly to a conventional AC transformer.
MODEL / RATING / SCOPE
This configuration does not assign a released JIADEST model or fixed capacity range. The final transformer designation, electrical ratings, losses, impedance and documentation are confirmed in the quotation and approved technical schedule.
| Parameter | Project requirement |
|---|---|
| Application | PCS AC interface to the grid / medium-voltage collection system |
| Rated power | Specify continuous apparent power in both charging and discharging modes |
| AC voltages | Provide PCS AC voltage, grid voltage and permissible voltage variation |
| Converter data | Provide harmonic spectrum, switching characteristics, earthing and isolation requirements |
| Thermal duty | Provide charge/discharge cycles, overload duration, ambient temperature and altitude |
| Protection & interfaces | Define transformer protection, monitoring, interlocks and PCS coordination |
TECHNICAL SELECTION / VERIFIED INDUSTRY EXAMPLES
Domestic series codes and international product-family names describe different design and supply scopes. Use the original manufacturer’s designation together with its application and published specification.
| Manufacturer / product | Published model / family | Rated power reference | Voltage reference | Application distinction |
|---|---|---|---|---|
| Pearl Electric · Oil-immersed compact substation ↗ | No model code stated on the cited page | 1,000–2,500 kVA | HV: 11 / 20 / 22 / 33 kV; LV: 0.4 / 0.69 kV | Integrated station reference; not a standalone transformer rating schedule. |
| Pearl Electric · Dry-type compact substation ↗ | No model code stated on the cited page | 3,000–5,000 kVA | HV: 11 / 20 / 22 / 33 kV; LV: 0.4 / 0.69 kV | Dry-type station example; converter and transformer scope must be identified. |
| CHINT · PV pad-mounted transformer ↗ | ZGS11-Z.T | Not stated in this brochure entry | Up to 40.5 kV; this is a stated voltage limit, not a voltage ratio. | Photovoltaic power-station application. Do not infer its kVA range from adjacent products. |
| Eaton · Low-voltage solar-duty transformer ↗ | Solar duty product family; individual codes depend on configuration | 15–300 kVA | 600 V voltage class; not a specified winding voltage ratio. | Bidirectional low-voltage application; not a medium-voltage BESS main step-up transformer. |
A conventional transformer connects to the inverter or PCS AC side. Battery DC connects through the PCS. Review converter harmonics, loading cycles, winding arrangement and earthing; the required design is application-specific.
Hitachi Energy · solar & BESS engineering reference ↗PV array MWp and battery MWh are not transformer apparent-power ratings. Provide inverter or PCS apparent power, AC voltages, power factor, reactive-power duty and ambient conditions when requesting a transformer.
HPS · solar-duty sizing reference ↗Provide the single-line diagram, inverter or PCS datasheet, site layout and grid connection requirements. Agree the general arrangement, winding diagram, applicable test schedule and interface responsibilities before manufacture.
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Send the application, AC voltages, apparent power and converter data for an engineering review.