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An enclosed packaged unit that is fully assembled in the factory and undergoes type testing and arc-resistance testing.
It is a pre-assembled packaged distribution facility — commonly known as a compact secondary substation — that highly integrates medium-voltage switchgear, a distribution transformer, low-voltage distribution equipment, and auxiliary systems into a prefabricated cabin / enclosure. Its key advantages are a small footprint, fast installation, high integration, and suitability for unattended operation. It is widely used at the end of urban distribution networks, in industrial parks, residential communities, and public areas, making the compact secondary substation an ideal solution for rapid deployment in space-constrained environments.
• Factory prefabricated, plug-and-play
• Fully insulated and fully enclosed for intrinsic safety
• Zero-maintenance design
• 3-year warranty
Product Features

Fully insulated, fully enclosed, and fully shielded, the compact secondary substation is engineered for maximum safety.

Factory prefabrication + full type testing, every compact secondary substation undergoes rigorous quality assurance.

High protection and long service life

Low noise, low radiation, and fire resistance
Technical Parameters (Customizable)
| 33kV 500kVA Compact Substation | |
| Table Headers | Rated Voltage / Capacity / Vector Group / Impedance / Insulation Level |
Customization / Additional Notes: Mineral oil / vegetable oil, plug-in terminals, and protection relay options are available.
FAQ
It is a packaged distribution unit that has passed type testing and internal arc testing. It integrates medium-voltage (MV) switchgear, a distribution transformer, low-voltage (LV) switchgear, connections, and auxiliary equipment into one sealed enclosure to achieve power conversion and distribution from medium voltage to low voltage.
MV compartment, transformer compartment, LV compartment, enclosure, and auxiliaries.
Extremely small footprint, rapid deployment, high reliability, intelligent O&M, and environmental friendliness.

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E-mail: junqiu.wang@czguanghui.cn
jocelyn.duan@czguanghui.cn
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