Product Brief

ZGS‑G series American‑style box‑type substation dedicated for photovoltaic application is a combined‑type transformer. Its high‑voltage fuse, multi‑position load switch and off‑circuit tap‑changer are integrated as internal components inside the transformer oil tank, with low‑voltage complete‑set equipment mounted externally. Used in photovoltaic power generation systems, it steps up the low‑voltage output from inverters (0.69 kV, 0.27 kV or 0.315 kV) to grid voltage (10 kV or 35 kV) for grid‑connection. Generally, it adopts double‑split or double‑winding oil‑immersed transformer, and the high‑voltage switch is oil‑immersed type.

Product Model Description of American‑style Substation for Photovoltaic Application

Service Environment of American‑style Substation for Photovoltaic Application

Product Features

1. The design complies with requirements of GB/T 10217‑2013 and GB/T 6451.
2. All live parts are enclosed inside the cabinet without exposed live conductors. With fully‑sealed and fully‑insulated structure, no insulation clearance is required, which reliably ensures personal safety. Since all high‑voltage live parts are sealed inside the oil tank with no exposed live components, it delivers reliable safety performance and effectively prevents intrusion by small animals.
3. The American‑style substation can be connected to ring‑network power supply system to form ring‑network power supply together with cabinet‑type ring main units or cable distribution boxes; terminal‑type configuration is also available.
4. Small size and small floor‑space occupation. Heat dissipation is realized via radiators, and fans can be additionally installed. It features low operating noise. For distribution systems with the same voltage level and capacity, the volume of our American‑style substation is only one‑third of that of European‑style substation.
5. Compact structure and cost‑effective. All complete‑set components of the American‑style substation are compactly arranged inside or on the transformer tank without extra auxiliary equipment. Plug‑in fuses are adopted for high‑voltage side protection for convenient inspection, operation and maintenance. Circuit breakers on low‑voltage side are fixedly installed with safe, reliable and stable connections.
6. The oil‑immersed transformer provides strong overload capacity, low partial discharge, high insulation level, low noise and long service life.
7. A control (auxiliary) transformer compartment is arranged inside the substation. It converts inverter‑output voltage to utility power (single‑phase 220 V, three‑phase 380 V) for powering auxiliary equipment and lighting devices, ensuring reliable operation of the box‑type substation.
8. Photovoltaic‑specific surge protective devices are equipped on the low‑voltage side to provide professional protection against harmonics, overvoltage and interference generated by inverters.
9. Intelligent integrated measurement and control devices (comprehensive protection or relay protection) can be configured upon user requirements to realize remote monitoring and operation.

Typical Primary System Scheme of American‑style Substation for Photovoltaic Application

Outline Layout of American‑style Substation for Photovoltaic Application