Prefabricated Substations

ZGS Series Combined Transformer Substation, American Type

ZGS Series

Product Overview
Designed for 7.2/12kV ring main, dual-power, and terminal power supply systems, integrating HV power distribution, metering, compensation, and protection functions. The HV side features multi-position load switches and fuses, while the LV side supports customized power distribution modules (control devices, reactive power compensation, and energy metering).
The equipment supports indoor/outdoor installation, widely applied in industrial parks, commercial centers, high-rise buildings, and other scenarios.

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Model Designation

Product Features

● Compact Design: Volume is only ~1/3 of domestic European-style substations with the same capacity.

● Fully Sealed & Insulated: Eliminates the need for insulation clearances, ensuring personal safety.

● Flexible Application: Suitable for both ring main and terminal systems with easy conversion, enhancing power supply reliability.

● Load-bearing Cable Joints: Operable at 200A load current, functioning as load switches in emergencies with isolator switch features.

● Dual Fuse Protection: Reduces operation costs. Plug-in fuses are thermal-magnetic (sensitive to temperature & current).

● Delta/Wye Connection & Column Structure: Offers high voltage quality, neutral point non-shift, non-heating enclosure, low noise, and good lightning protection.

Technical Specifications

No.	Items	Unit	Data
1	Rated voltage	kV	10/0.4 (HV/LV)
2	Maximum operating voltage	kV	12 (HV)
3	Rated frequency	Hz	50
4	Rated capacity	kVA	50-1600
5	1 min power frequency withstand voltage	kV	35
6	Lightning impulse withstand voltage	kV	50
7	Cooling method		ONAN
8	High voltage backup fuse breaking current	kA	50
9	Plug-in fuse breaking current	kA	25
10	Ambient temperature	℃	-35~+40
11	Allowable temperature rise of coil	℃	65
12	No-load voltage regulation		±5% or ±2×2.5%
13	Noise level	dB	50
14	Protection level		IP43