JSR6-72.5kV/1250A-31.5kA Gas-insulated metal-enclosed switchgear

Product Introduction

JSR6-72.5kV/1250A-31.5kA gas-insulated metal-enclosed switchgear (C-GIS) for offshore wind power is independently developed by our company to fill the domestic shortage of technology. A new generation of leading high-voltage switchgear. It is suitable for power systems with a voltage level of 72.5kV and three-phase AC 50Hz. The equipment is generally installed on a platform inside the wind turbine tower. It is mainly used for the connection between the step-up transformer and the wind turbine collector cable, and for the main electrical circuit of the wind turbine. Cast, control and protect.

This product is a new generation of high-voltage complete set of electrical appliances that integrates vacuum arc extinguishing technology, solid-sealed pole technology, gas insulation technology and interface insulation technology. The equipment adopts intelligent control and protection units with complete control, protection and measurement functions, which can fully meet the needs of offshore wind power collection network systems. The product has passed the type test verification of the National High Voltage Electrical Product Testing Center, has obtained a number of national invention patents and utility model patents, and has independent intellectual property rights.

Technical Parameters

Item			Unit	Paremeters
Rated voltage			kV	72.5
Rated frequency			Hz	50
Rated current			A	630/1250
Rated insulation level	Power frequency withstand voltage	Alternatively, relatively	kV	140
		Isolating switch break, circuit breaker break	kV	140+(42)
	Lightning impulse withstand voltage	Alternately, relatively	kV	325
		Isolating switch break, circuit breaker break	kV	325+(60)
	Rated power frequency withstand voltage of auxiliary circuit		kV	2
Rated short-time withstand current			kA	31.5
Rated short circuit duration			s	4
Rated peak withstand current			kA	80
Rated short-circuit breaking current of circuit breaker			kA	31.5
Rated short-circuit closing current of circuit breaker (peak value)			kA	80
Vacuum circuit breaker rating				M1 E2 C2
Gas moisture content			ppm	≤150
Rated operating sequence				O-0.3s-CO-3min-CO
Insulating gas				SF6
SF6 rated pressure (abs, 20℃)	Rated inflation pressure (abs, 20℃)		Mpa	0.04
	Minimum inflation pressure (abs, 20℃)		Mpa	0.02
Protection level	Inflatable compartment		Level	IP67
	Switchgear housing		Level	IP4X
Mechanical life	Circuit breaker		times	8000
	Three-position switch		times	3000
Gas annual relative leakage rate			%	≤0.1
Rated power supply voltage of auxiliary circuit			V	DC110/220 AC110

Equipment dimension

Specifications	Rated current	Width (mm)	Depth(mm)	Height (mm)
72.5kV	630/1250A	1100	2200	2600

Features

Safety ● High voltage The components are completely sealed and the insulation performance is not affected by the marine environment. ● Complete interlocking, latching and reliable internal arc-resistant design ensure the safety of operating personnel. ● The grounding switch has a quick grounding function and provides quick grounding protection.

Reliability ● The main switch adopts vacuum arc extinguishing, which has strong breaking capacity and is safe and reliable. ● Micro positive pressure gas insulation, no need to inflate on site. ● Components can withstand harsh environments and load IEC62271-100 (temperature and humidity) and IEC60082-2-52 (humidity and salt spray).

Miniaturization ● Modular design, designed for the environment inside the wind turbine tower, the compact structure can be more Effective use of space ● Non-detachable (air box) maximum width is less than 1100mm, convenient for entering and exiting the tower door

Economical ● Fully enclosed switch, long service life and not affected by the environment ● Less maintenance requirements, which can save operating costs to the greatest extent ● Multiple circuits Incoming and outgoing cables, meeting the needs of connecting a variety of collector cables ● Environmentally friendly, the materials used are recyclable

Efficiency ● Overall pre-assembled in the factory, no need on site Cabinet-to-cabinet splicing ● Plug-in design for quick installation without gas operation on site ● Friendly operation interface, local operation of the main switch is integrated on the same panel

Product usage environment

1. Outdoor or indoor use

2. Ambient temperature: local maximum ambient temperature +65℃, minimum temperature -40℃

3. Environmental humidity: meet all humid environments

4. Anti-corrosion level: offshore C4H

5. Earthquake resistance level: AG5 (horizontal acceleration 0.3g. vertical acceleration 0.15g)

6. Electromagnetic interference: The amplitude of electromagnetic interference induced in the secondary system is ≤1.6kV

7. Installation environment: There are no explosive and corrosive gases in the surrounding air, and the installation site is free of violent Vibration and impact, the pollution level exceeds level 4 in GB/T5582.