Gw4a-12 Series Outdoor High-Voltage AC Isolator Switch Disconnectors Disconnector/Disconnecting

• Type: High-voltage
• Structure: Three-column Disconnector
• Installation: Outdoor High-voltage
• Operation: Electric
• Grounding Mode: Grounding
• Movement Mode: Horizontal Rotary Type
• Model NO.: GW4A
• Number of Poles: Three Pole
• Structure of Operating: Electric
• Certification: ISO
• Transport Package: Export Box
• Trademark: DGG
• Origin: China
• HS Code: 853530900
• Production Capacity: 10000PCS/Year

Product Description

Photos of Product

General

GW4A-12 series finished hairpin improved outdoor high-voltage AC isolation switch(hereinafter referred to as "Isolation switch") is an outdoor high-voltage switchgear with a rated frequency of 50Hz, which is used for switching 10kV High-voltage Line under voltage and no load, and for the electrical isolation of overhauled high-voltage bus, circuit breaker and other electrical equipment from live high-voltage lines, It can also be used to close very small capacitive current and inductive current.

The Isolation switch meets the technical standards of high voltage AC disconnectors and earthing switches (GB/T 1985-2014) and high voltage AC disconnectors and earthing switches (DL/T 486-2010).


Model And Meaning


Usage: Environmental Condditions

1. Altitude: no more than 1000m. If the altitude is higher than 1000m, the rated insulation level shall be corrected accordingly.
2. Ambient temperature: upper limit + 45 ⁰C, lower limit - 40 ⁰C, average temperature of the hottest month 30 ⁰C, maximum daily temperature difference 25K.
3. Solar radiation intensity (outdoor): 0.1W/cm²
4. Wind speed / pressure (outdoor): 34m/s  /  700Pa
5. Pollution level: e-level
6. Icing thickness: not more than 20mm
7. Humidity: average daily relative humidity, not more than 95%, average monthly relative humidity not more than 80%
8. Earthquake resistance: horizontal acceleration 0.3m/², vertical acceleration 0.15m/s²
9. Safety factor: sinusoidal resonance three cycle wave, safety factor above 1.67.

Main  Advantages

1. It adopts a perfect and improved design, no welding is required for installation, and the operation is simple and convenient.
2. It adopts double column middle opening and contact transfer in structure, which has the ability of automatic contact cleaning and strong operation reliability.
3. The contact finger uses high strength, high conductivity, and high elasticity materials, which can clamp the contact by relying on its own elasticity, avoiding the vicious cycle caused by the reduction of contact clamping force caused by spring corrosion and heating annealing, the increase of contact resistance and the intensification of contact heating.
4. The insulator is made of high-strength porcelain material and designed with a large creepage distance. It has strong pollution resistance and environmental adaptability and can meet the operation requirements in high-altitude areas.
5. The rotating part shall be designed according to maintenance-free requirements.

Technical Parameters
 

No.	Item	Unit	Data
1	Rated Frequency	Hz	50
2	Rated Voltage	kV	12
3	Rated Current	A	630	1250	2000	2500
4 5	Rated Short-time Withstand Current  Rated Short-Time Withstand Current(Peak Value)	kA	20/4	25/31.5	31.5	31.5/40
			50/63	63/80	80	80/100
6	Rated short-time power frequency withstand voltage	kV/min	42/1 (Interphase, to earth)
			48/1 (Fracture)
7	Rated lightning impulse withstand voltage	kV	75 (Interphase, to earth)
			85 (Fracture)
8	Rated Short-Time Withstand Current Continuous Time	s	4 (Isolation Switch)		2 (Earthing Switch)
9	Circuit resistance	μΩ	≤100		≤80
10	Mechanical life	Times	2000 (Isolation Switch/Earthing Switch)
11	Creepage distance	mm	≥372 (e - Level)
Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate.

 

Outline  And Installation Dimension