GW4 – 252(D)(W) Outdoor High Voltage Disconnector

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The GW4 - 252(D)(W) outdoor high voltage disconnector is one of the most commonly used disconnect switches in the world owing to its simple but efficient design. It is composed of three poles and each pole comprises a base, two rotational support insulators, and a main blade moving horizontally.

The base of our disconnector is made of a square tube in which the turntables and bearing housings are installed. The turntable is supported by two roller bearings and the sealed bearing housing is filled up with grease, ensuring long service life. All steel parts are processed by hot-dip galvanizing.

The insulators our high voltage disconnector adopts are in conformity with IEC, DIN or ANSI specifications.

The main blade contains a U-shaped tube, in which the main contacts and the rotating contacts are installed. The main contact is made of silver-plated copper. The rotating contact comprises a silver-plated copper pin and a bronze housing. The silver-plated bronze balls, which are pressed against the aforementioned two parts by a stainless steel spring, ensure that the current is transferred from the pin into the housing. This contact structure is sealed and maintenance-free. The contacts are self-cleaning, making our isolation switch suitable for use in areas with harsh climatic conditions.

GW4 – 252(D)(W) Outdoor High Voltage Disconnector

This outdoor high voltage disconnector can be equipped with earthing switches which are mounted on the left hand side or the right hand side or both sides. The grounding switch includes an aluminum tube, on both ends of which the silver-plated copper contacts are mounted.

A single pole or all three poles of the disconnect switch and/or earthing switches can be operated by a CJ6 motor operating mechanism or a CS14G or CS9-G manual operating mechanism.

Advantages
1. Cost-effective
2. Easy start-up and commissioning
3. Low operating torque
4. High short circuit carrying capacity
5. Almost maintenance-free due to the adoption of corrosion-resistant materials

Technical Parameters of GW4 - 252(D)(W) Outdoor High Voltage Disconnector

Items		Units	Value
Rated Voltage		kV	252
Rated insulation level	1min power frequency withstand voltage (RMS)	To earth	kV	460
		Open gap	kV	530
	Rated lightning impulse withstand voltage (Peak)	To earth	kV	1050
		Open gap	kV	1200
Rated frequency		Hz	50
Rated Current		A	1250	1600	2000	2500	3150
Rated short time withstand current, 4s		kA	31.5	31.5	40	50	50
Rated peak withstand current		kA	80	80	100	125	125
Rated short-circuit duration		s	3
Rated terminal mechanical load	Vertical load	N	1000
	Lateral load	N	750
	Vertical force	N	3000
Earthing Switch	Rated short time withstand current	kA/s	40/3	40/3	40/3	50/3	50/3
	Rated peak withstand current	kA	100	100	100	125	125
Disconnector busbar conversion current switching capability				300V, 1600A, 100 times
Mechanical life		times	2000
Creepage Distance		mm	6300 7812
Manual operating mechanism	Model		CS14G or CS9-G
	Control circuit voltage	V	AC220, DC110, DC220
Motor operating mechanism	Model		CJ6
	Motor voltage	V	AC380
	Control circuit voltage	V	AC220, AC380, DC220
	Opening and closing time	s	6±1
Weight of single pole	Without earthing	kg	585	605	625	645	665
	Single earthing	kg	615	635	655	675	695
	Double earthing	kg	635	655	675	705	725

Related Names
Power Transmission Disconnect Switch | High Voltage Disconnect Switch | Safety Isolator Switch

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