17.5kV 20kV Three-phase oil-immersed grounding transformer with oil conservator

 It is widely used in medium and high voltage three-phase power systems such as 10kV, 35kV, 46kV, including industrial parks, power distribution substations, wind farms, photovoltaic power stations, and mining areas. It is especially suitable for outdoor installation scenarios that require reliable grounding protection, high insulation performance, and low maintenance demand.

Q:What are the daily maintenance focuses of three-phase oil-immersed grounding transformers?

A:Routine maintenance mainly includes regular inspection of oil level, oil color and oil tightness to prevent oil leakage and oil quality degradation; cleaning the tank surface to ensure heat dissipation efficiency; verifying the operation status of protective devices such as gas relays and pressure relief valves; and periodically testing the insulation performance and zero-sequence impedance of the three-phase windings.

Q:Can three-phase oil-immersed grounding transformers be customized for special working environments?

A:Yes. According to different working environments, manufacturers can customize the tank structure (such as anti-corrosion coating for chemical areas, anti-vibration design for mining areas), insulation level (adapt to high-humidity or high-altitude areas), and oil type (synthetic ester oil for fire-prone areas) to meet the personalized operation needs of various harsh environments.

Q:Can the zero-sequence impedance of three-phase oil-immersed grounding transformers be adjusted according to system requirements?

A:Yes. The zero-sequence impedance can be flexibly adjusted by optimizing the winding structure (such as zig-zag winding parameters) and core design. It can be customized according to the fault current limitation requirements of the target power system to achieve optimal coordination with the system protection device.