{"product_id":"partial-discharge-free-power-frequency-withstand-voltage-test-system-250kva-500kv","title":"Partial Discharge-Free Power Frequency Withstand Voltage Test System 250kVA-500kV","description":"\u003cp\u003ePartial Discharge-Free Power Frequency Withstand Voltage Test System  Meets the AC withstand voltage and partial discharge testing requirements for transformers, GIS, instrument transformers, and other equipment at the 110kV and 220kV voltage levels. For the 220kV voltage level, the maximum test voltage is 460kV; for the 110kV voltage level, the maximum test voltage is 275kV, with a withstand duration of 1 minute.\u003c\/p\u003e\n\u003cp\u003ePartial Discharge-Free Power Frequency Withstand Voltage Test System System Features\u003c\/p\u003e\n\u003cp\u003eA hydraulic lifting system enables one-touch operation to switch the main unit between a horizontal position (for transport) and a vertical position (for operation).\u003c\/p\u003e\n\u003cp\u003eThe system primarily consists of an operation console, a test transformer, a high-voltage measuring voltage divider, a coupling capacitor, a current-limiting reactor, a low-voltage compensation reactor, a power isolation transformer, and other components.\u003c\/p\u003e\n\u003cp\u003e①   Strong arc-extinguishing capability and superior insulation performance.\u003c\/p\u003e\n\u003cp\u003e②   Fire-resistant; utilizes non-flammable gas for intrinsic safety.\u003c\/p\u003e\n\u003cp\u003e③   Lightweight with a highly integrated structure, combining the gas-insulated test transformer, coupling capacitor, current-limiting resistor, and voltage divider into a single unit.\u003c\/p\u003e\n\u003cp\u003e④   Convenient for transport and installation; requires minimal floor space.\u003c\/p\u003e\n\u003cp\u003e⑤   Clean and oil-free; requires no maintenance (only periodic monitoring of gas pressure and density is necessary).\u003c\/p\u003e\n\u003cp\u003e⑥   Minimally affected by environmental conditions, as the entire system is hermetically sealed within a metal enclosure.\u003c\/p\u003e\n\u003cp\u003e⑦   Traditional configuration (with external current-limiting resistors, coupling capacitors, and voltage dividers): Partial discharge level is approximately 10pC.\u003c\/p\u003e\n\u003cp\u003e⑧   Integrated configuration (with built-in current-limiting resistors, coupling capacitors, and voltage dividers): Total partial discharge level is 5pC.\u003c\/p\u003e\n\u003cp\u003e⑨   Partial discharge level: \u0026lt; 5pC. Protection functions: Over-current and over-voltage protection with alarm and automatic return-to-zero capability.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"wp-image-8070\" src=\"https:\/\/musenelec.com\/wp-content\/uploads\/2026\/05\/250kVA500kV-03.jpg\" alt=\"Partial Discharge-Free Power Frequency Withstand Voltage Test System\" width=\"589\" height=\"589\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cb\u003eMain Technical Parameters and Functions of the Device\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRated Capacity: 250 kVA\u003c\/li\u003e\n\u003cli\u003eInput Power Supply: Single-phase 380 V, 50 Hz\u003c\/li\u003e\n\u003cli\u003eRated Voltage: 500 kV\u003c\/li\u003e\n\u003cli\u003eRated Current: 0.5 A\u003c\/li\u003e\n\u003cli\u003eOperating Frequency: 50 Hz\u003c\/li\u003e\n\u003cli\u003eDevice Output Waveform: Sine wave\u003c\/li\u003e\n\u003cli\u003eWaveform Distortion Rate (Complete Set): ≤ 2%\u003c\/li\u003e\n\u003cli\u003eSystem Noise Level: ≤ 50 dB\u003c\/li\u003e\n\u003cli\u003eTransformer Short-circuit Impedance: ≤ 10%\u003c\/li\u003e\n\u003cli\u003eOperating Duration: Continuous operation permitted for 30 minutes at rated voltage and current; 1 minute at 1.1 times the rated voltage (overvoltage).\u003c\/li\u003e\n\u003cli\u003ePartial Discharge Level (Complete Set): ≤ 5 pC at rated voltage.\u003c\/li\u003e\n\u003cli\u003eTest System Protection:\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e(a) To mitigate the impact of overvoltage generated on the test transformer during test object discharge, appropriate protective resistors are configured within the high-voltage circuit, and other supplementary protective measures are also implemented.\u003c\/p\u003e\n\u003cp\u003e(b) The high-voltage side employs a tail-end current-based overcurrent protection device, as well as other effective protective mechanisms.\u003c\/p\u003e\n\u003col start=\"13\"\u003e\n\u003cli\u003eDimensions and Weight\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e(1) Total Length: 7.4 m\u003c\/p\u003e\n\u003cp\u003e(2) Total Width: 1.54 m\u003c\/p\u003e\n\u003cp\u003e(3) Horizontal Height: 2.8 m; Vertical Height: 6.2 m\u003c\/p\u003e\n\u003cp\u003e(5) Total Weight: 5.6 t\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"wp-image-8071\" src=\"https:\/\/musenelec.com\/wp-content\/uploads\/2026\/05\/250kVA500kV-04.jpg\" alt=\"Partial Discharge-Free Power Frequency Withstand Voltage Test System\" width=\"798\" height=\"798\"\u003e\u003c\/p\u003e","brand":"musenelectric.com","offers":[{"title":"Default Title","offer_id":52213369340187,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/0967\/6315\/files\/250kVA500kV-01.jpg?v=1778822620","url":"https:\/\/musenelectric.com\/products\/partial-discharge-free-power-frequency-withstand-voltage-test-system-250kva-500kv","provider":"musenelectric.com","version":"1.0","type":"link"}