Detailed Introduction
Product Description
The 500 kV GIS Voltage Transformer is a core voltage-sensing device used in the GIS switchgear of 500 kV extra-high-voltage AC power systems. It features an all‑enclosed metal housing, SF₆ gas insulation, and a compact electromagnetic design. The interior is filled with highly stable SF₆ insulating gas, and it achieves hermetic sealing and electrical connection to the 500 kV GIS busbar via high‑strength basin-type insulators. This device accurately acquires voltage signals from extra‑high‑voltage systems, providing high‑precision voltage data for grid dispatching, relay protection, energy metering, and condition monitoring. The product strictly complies with ultra‑high‑voltage equipment standards such as GB/T 20840 and IEC 61869, meeting the requirements for safe, stable, and long‑term operation of 500 kV GIS substations.
Product Features
1. A miniaturized, optimized design for the 500 kV ultra-high-voltage class, significantly reducing overall dimensions and weight, and enabling compact integration with GIS‑based ultra-high-voltage equipment.
2. It employs an ultra‑grade, low‑loss cold‑rolled grain‑oriented silicon steel core, delivering excellent excitation characteristics, minimal errors, and superior linearity, thereby meeting the requirements of high‑accuracy metering.
3. The windings employ multi-layer composite insulation combined with vacuum impregnation, resulting in high dielectric strength, low partial discharge, and extended corona‑resistance life.
4. All-metal sealed tank body with SF₆ internal insulation, featuring no exposed porcelain bushings, thereby structurally eliminating insulation failures such as pollution flashover, rain flashover, and fog flashover.
5. Equipped with a fully shielded, equalizing shielding system and optimized through three-dimensional electric field simulation, it delivers a uniform, distortion-free electric field and industry-leading operational stability.
6. Featuring a double-seal, multi‑seal design, the annual SF₆ gas leakage rate is well below 0.1%, enabling maintenance‑free operation throughout the equipment’s entire service life.
7. Exceptional overvoltage withstand capability, capable of withstanding lightning surges, switching surges, and short-duration power-frequency overvoltages, with ample insulation margin.
8. Excellent anti-resonance performance, with a built-in detuning device that completely prevents voltage distortion and equipment damage caused by ferroresonance.
9. The fully enclosed housing offers a high degree of protection, making it suitable for a wide range of extreme environments, including high-altitude, desert, coastal, frigid, and hot-humid conditions.
10. Excellent temperature-rise control: under rated load, the temperature rise remains below the standard limit, ensuring no overheating or accelerated aging during long-term operation.
Parameter
Model number | JDQXF-66 | JSQ-66 | JDQXF-110 | JSQ-110 | JDQXF-220 | JDQXF-330 | JDQXF-500 | JDQXF-765 | |
Maximum Equipment Voltage (kV) | 72.5 | 126 | 252 | 363 | 550 | 800 | |||
Rated frequency (Hz) | 50/60 | ||||||||
Installation method | Upright/Inverted/Horizontal | ||||||||
Insulation type | SF6 | SF6 or mixed gas | SF6 | ||||||
Rated voltage factor | 1.2 times, consecutive | ||||||||
1.9 times, 8 hours | 1.5 times, 30 seconds | ||||||||
Rated Power-Frequency Withstand Voltage (kV) | 160 | 230 | 460 | 520 | 740 | 975 | |||
Rated Lightning Impulse Withstand Voltage (kV) | 350 | 550 | 1050 | 1175 | 1675 | 2100 | |||
Secondary winding (1a–1n) | Accuracy level | Class 0.2, Class 0.5 | |||||||
Rated Output (VA) | 50 | 100 | 50 | ||||||
Secondary winding (2a–2n) | Accuracy level | Class 0.5, Class 3P | |||||||
Rated Output (VA) | 50 | 100 | 50 | ||||||
Remaining winding (da-dn) | Accuracy level | 3P level | |||||||
Rated Output (VA) | 300 | ||||||||
SF6 rated pressure (20°C) (MPa) | 0.5 | 0.4 | |||||||
SF6 recharging pressure (20°C) (MPa) | 0.45 | 0.35 | |||||||
SF6 leakage rate (%) | <0.05% | ||||||||
SF6 trace moisture content (μL/L) | ≤150 | ||||||||
External dimensions | Height (mm) | 792 | 1000 | 792 | 1000 | 1310 | 1545 | 1725 | 2395 |
Length (mm) | 420 | 795 | 420 | 795 | 666 | 720 | 974 | 1358 | |
Width (mm) | 420 | 795 | 420 | 795 | 666 | 720 | 974 | 1358 | |
Base mounting dimensions | Mounting hole (mm) | 4×φ24 | 4×φ26 | 4×φ24 | 4×φ26 | 4×φ30 | 4×φ26 | 4×φ26 | 8×φ34 |
Hole spacing (mm) | 330×330 | 550×550 | 330×330 | 550×550 | 560×560 | 590×590 | 700×700 | 480×680/ 680×480 | |
Total product weight (kg) | 150 | 460 | 350 | 650 | 950 | 1800 | |||
Quotation Inquiry
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JDQXF-500
Product Installation and User Manual Download:
Keywords:
Voltage transformer for GIS
Contact Information
Service Hotline:
Service email: tkhgqscb@163.com
Company Address: No. 11526, Longtan South Road, High-tech Zone, Tai’an City, Shandong Province
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Specializing in the production of electrical metering and protection equipment.
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Service Hotline:
Service email: tkhgqscb@163.com
Company Address: No. 11526, Longtan South Road, High-tech Zone, Tai’an City, Shandong Province