搜索历史清除全部记录

最多显示8条历史搜索记录噢~

All

All
Product Management
News and Information
Introduction Content

Product Center

Specializing in the production of electrical metering and protection equipment.

Home

JDQXF-220

Category:

Voltage transformer for GIS

Inquiry for a quote

Keywords:

Voltage transformer for GIS

Detailed Introduction

Product Description:

The 220 kV GIS Voltage Transformer is a high‑precision, highly reliable electromagnetic voltage transformer custom‑designed for 220 kV AC power system GIS switchgear. It features an all‑metal, fully enclosed housing and employs ultra‑high‑purity SF₆ gas as the insulating medium. The unit is rigidly connected to the GIS busbar via high‑strength basin‑type insulators. Primarily used to acquire single‑phase voltage signals from the 220 kV system, it provides accurate voltage parameters for grid protection devices, energy metering equipment, and operational monitoring systems. This product meets the compact, intelligent construction requirements of 220 kV GIS substations and fully complies with national standards such as GB/T 20840 and international IEC standards including IEC 61869.

Product Features:

1. A completely redesigned, miniaturized single-phase 220 kV GIS features compact dimensions and lightweight construction, facilitating integrated internal arrangement within the GIS equipment.
2. By employing an ultra-high-gradient insulation structure and a high-precision winding process, the measurement accuracy can reach Class 0.2, while the protection accuracy can achieve Class 0.5, meeting the requirements of high-end applications.
3. The core is constructed from multi‑step‑joint, low‑loss grain-oriented silicon steel laminations, offering excellent excitation characteristics, eliminating the risk of hysteresis saturation, and delivering an exceptionally low voltage waveform distortion.
4. All-metal sealed tank body, with internal insulation using SF₆ gas and no exposed insulating components; resistant to contamination, moisture, and condensation, suitable for demanding operating conditions.
5. Equipped with a multi-stage equalizing shield system, it ensures excellent electric field uniformity, extremely low partial discharge levels, and high long-term insulation reliability.
6. The sealing structure employs a double-seal design, resulting in an extremely low annual SF₆ leakage rate. No gas replenishment is required throughout the equipment’s entire service life, enabling maintenance-free operation.
7. It exhibits strong resistance to overvoltage and short circuits, can withstand system fault transients without damage or false tripping, thereby ensuring the safe and stable operation of the power grid.
8. Low operating noise, minimal temperature rise, and strong mechanical seismic resistance, meeting the dynamic and thermal stability requirements of power systems.
9. The fully enclosed housing is unaffected by altitude, sand and dust, salt spray, acid rain, and extreme temperature fluctuations, making it suitable for a wide range of environments.
10. The enclosure is made of high-strength, corrosion-resistant alloy material and features a special surface treatment, ensuring it remains rust-free, corrosion-resistant, and colorfast even under prolonged outdoor exposure.

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