Detailed Introduction
Product Description
The 330 kV GIS Voltage Transformer is a specialized voltage‑acquisition device developed for 330 kV high‑voltage AC power‑system GIS equipment. It features an oil‑free, fully enclosed, SF₆‑gas‑insulated design, with a high‑precision core and windings sealed within a metal housing. Primary insulation and heat dissipation are achieved using high‑pressure SF₆ gas, while a large‑diameter basin-type insulator ensures reliable connection to the 330 kV GIS busbar. The device accurately measures system operating voltage, providing critical data for relay protection, energy metering, fault recording, and condition monitoring in high‑voltage power grids. The product complies with standards such as GB/T 20840 and IEC 61869, meeting the long‑term, high‑reliability operational requirements of 330 kV GIS substations.
Product Features
1. The compact single-phase GIS design for the 330 kV ultra-high-voltage level achieves excellent control over both volume and weight, reaching a domestically leading and internationally advanced standard.
2. It employs a high-precision, low-loss core and windings made with special insulated conductors, delivering excellent accuracy characteristics and ensuring stable, drift-free performance over long-term operation.
3. The insulation system employs a dual-insulation design featuring SF₆ gas combined with composite insulating supports, offering high dielectric strength and excellent resistance to mechanical impact, corona discharge, and aging.
4. Fully enclosed metal tank structure with no external insulation exposed, completely eliminating insulation flashover issues in high-altitude and heavily polluted environments.
5. Equipped with a large, internally mounted equipotential shielding electrode and an optimally designed electric field distribution, the equipment achieves partial discharge levels well below the standard limits, ensuring safe and reliable operation.
6. Ultra‑long‑life sealing system with an annual SF₆ leakage rate of less than 0.1%, requiring no maintenance or gas replenishment, thereby reducing life‑cycle costs.
7. Outstanding resistance to ferromagnetic resonance and overvoltage, equipped with a dedicated damping structure that effectively suppresses resonant overvoltages and protects equipment.
8. The enclosure features full-sealed protection, enabling it to withstand extreme and harsh conditions such as high altitudes, strong winds and sandstorms, heavy salt spray, and intense ultraviolet radiation.
9. Low temperature rise and excellent heat dissipation ensure stable operating temperatures under rated load, with no risk of overheating.
10. The enclosure features corrosion and rust resistance and exceptional weather durability, making it suitable for long-term outdoor installation; its service life can exceed 30 years.
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 class | Class 0.2, Class 0.5 | |||||||
Rated Output (VA) | 50 | 100 | 50 | ||||||
Secondary winding (2a–2n) | Accuracy class | Class 0.5, Class 3P | |||||||
Rated Output (VA) | 50 | 100 | 50 | ||||||
Remaining winding (da-dn) | Accuracy class | 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
Please provide your contact information and specify your requirements, and we will arrange for a dedicated representative to get in touch with you.
JDQXF-330
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
Looking forward to working with you.
Please let us know what product you need.
Specializing in the production of electrical metering and protection equipment.
WeChat Official Account
Contact Us
Service Hotline:
Service email: tkhgqscb@163.com
Company Address: No. 11526, Longtan South Road, High-tech Zone, Tai’an City, Shandong Province