Detailed Introduction
Product Description:
The 110 kV GIS Three-phase Voltage Transformer is an integrated, electromagnetic voltage transformer designed for 110 kV AC power‑system GIS equipment. It incorporates the A, B, and C phase voltage sensing units within a single metal‑sealed enclosure, which is filled with standard‑pressure SF₆ gas to provide insulation and heat dissipation. The device is reliably connected to the GIS three‑phase common busbar via dedicated basin‑type insulators, enabling simultaneous acquisition of three‑phase system voltage signals. It supplies precise three‑phase voltage data to substation protection, measurement, and metering devices, and is well suited to the compact arrangement of 110 kV three‑phase common‑busbar GIS systems. The product complies with standards such as GB/T 20840 and IEC 61869, offering advantages including high integration, reduced footprint, and robust reliability.
Product Features:
1. An innovative 110 kV three-phase integrated box-type structure, featuring a low overall height and compact footprint, significantly reducing installation space and land occupation compared to three separate single-phase units.
2. The three-phase magnetic circuit and winding configuration are symmetrically designed, ensuring excellent phase‑to‑phase accuracy consistency and stable measurement errors, thereby meeting the requirements for high‑precision metering and fast relay protection.
3. It employs a high-grade, low-loss silicon steel core, resulting in small excitation current, low no-load losses, excellent temperature-rise control, and stable performance under long-term full-load operation.
4. Fully enclosed metal tank with an SF₆‑insulated internal structure, eliminating external porcelain bushings and completely preventing insulation failures such as pollution flashover, fog flashover, and condensation‑induced flashover.
5. It features a built-in three-dimensional equal‑potential shielding structure, ensuring balanced electric field distribution across all three phases; its partial discharge level significantly exceeds the standard requirements, with no safety risks during operation.
6. Exceptional sealing performance: the annual leakage rate of SF₆ gas is less than 0.1%, eliminating the need for routine maintenance and periodic gas replenishment, and resulting in extremely low lifecycle O&M workload.
7. Strong resistance to system resonance and ferroresonance, with a dedicated detuning structure that effectively prevents voltage abnormalities and equipment damage.
8. It exhibits excellent withstand capability against lightning surges, switching overvoltages, and short-duration power-frequency overvoltages, with ample insulation margin and high safety and reliability.
9. The fully enclosed housing offers a high degree of protection, enabling reliable long-term operation in harsh environments such as high altitudes, severe pollution, high humidity, and coastal salt spray.
10. The enclosure is corrosion‑resistant, wear‑resistant, and resistant to UV‑induced aging; it boasts high mechanical strength, and its seismic and impact‑resistance performance meets the transportation and operational standards of power systems.
Product Specifications
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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JSQ-110
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