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Outdoor High Voltage Disconnector

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.

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.

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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