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-765

Category:

Voltage transformer for GIS

Inquiry for a quote

Keywords:

Voltage transformer for GIS

Detailed Introduction

Product Description:

765kV GIS voltage transformer ( 765 The kV GIS Voltage Transformer is a high‑end voltage acquisition device developed for 765kV GIS equipment in ultra‑high‑voltage AC transmission systems. It features an all‑enclosed metal housing, SF₆ gas as the primary insulation, and a high‑precision electromagnetic induction principle. The interior is pressurized with high‑pressure SF₆ gas of superior dielectric strength, and it achieves reliable connection to the 765kV GIS busbar via ultra‑high‑voltage basin insulators. Primarily used to acquire voltage signals from UHV systems, it provides accurate voltage parameters for protection, metering, control, and monitoring in UHV grids. The product complies with UHV equipment standards such as GB/T 20840 and IEC 61869, and boasts high reliability, long service life, and maintenance‑free operation, making it well suited for the construction of 765kV UHV GIS substations.

Product Features:

1. Innovative miniaturized design of a 765 kV UHV GIS single-phase unit, featuring a compact footprint and lightweight construction, thereby overcoming the bottleneck of oversized UHV equipment.

2. Employing an ultra-low-loss, high-precision core and special high-temperature‑resistant insulated windings, the device delivers high accuracy and excellent stability, meeting the 0.2‑class requirements for ultra‑high‑voltage metering.

3. The UHV insulation system employs an SF₆ gas–epoxy‑impregnated composite support structure, offering high dielectric strength, excellent corona resistance, and superior aging resistance.

4. A fully enclosed metal-sealed structure with no external insulators, completely addressing the challenge of external insulation flashover in ultra-high-voltage equipment.

5. It features a built-in multi-stage simulation‑optimized equalizing shielding system, ensuring an exceptionally uniform electric field distribution and reducing partial discharge levels to near zero.

6. Double-seal structure, The annual leakage rate of SF₆ gas is less than 0.1%, ensuring zero gas replenishment and maintenance throughout the entire lifecycle.

7. It exhibits exceptionally strong resistance to ultra-high-voltage overvoltages, resonance, and short circuits, can withstand various system disturbances, and offers a substantial safety margin.

8 The enclosure features full-sealed protection, enabling stable operation at altitudes of up to 5,000 meters, under intense ultraviolet radiation, heavy salt spray, and severe sand and dust conditions.

9 . Low temperature rise, low noise, and high heat dissipation efficiency; performance remains stable even under continuous full-load operation.

10 . The enclosure is made of an ultra‑high‑strength, corrosion‑resistant alloy and features a multi‑layer anti‑corrosion coating, ensuring it remains free from corrosion and deformation 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 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