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Outdoor High Voltage AC Neutral Point Disconnector

The GW8 outdoor high voltage disconnector is a single-phase AC switching device used for breaking transformer neutral point earthing in an energized, no-load power system with the maximum voltage of 126kV and frequency of 50 or 60 Hz.

This disconnector is composed of the post insulator, porcelain insulator, and the conductive part. On top of the post insulator, there are fixed contacts and connecting plate for connection bus. Between the post insulator and the porcelain insulator, there is the metal base, connecting lever, and operating insulator. A switch blade is mounted on the base. The CS8-5 manual operating mechanism is connected with the switch blade through the connecting rod, operating insulator, and connecting lever. A CJ6 motor drive mechanism can also be adopted.

1. Adopting a clapper type structure, this neutral point disconnector occupies a small area.
2. The rotating part of this product is designed according to the requirement of freedom from maintenance. A cooperative structure of stainless steel shaft pin and oil-free self-lubricating bearing is adopted. All steel parts are hot-dip galvanized, so as to ensure that the disconnector is flexible and reliable to operate and it never rusts.
3. Our product is available in two types, ordinary type and anti-pollution type.

Service Conditions
Altitude ≤ 1000m (we can also provide products capable of serving in places above 1000m as per customer needs)
Ambient temperature -25℃~+40℃
Wind pressure ≤ 700Pa, corresponding to the win speed of 34m/s
Earthquake intensity ≤ VIII
Maximum ice thickness 10mm
Environment contamination level Class 0 for ordinary type;
Class II or III for anti-pollution type

Order Notice
When ordering, please pay attention to the following items:
1. Type and designation
2. Rated voltage
3. Ambient conditions
4. Type of operating mechanism and number of contact finger in the auxiliary switch
5. For the motor operating mechanism, the rated voltage of the motor is 380V and the control circuit voltage is AC 220V or 380V.

Main Technical Parameters of Neutral Point Disconnector
Item Units (H)GW8-40.5 (H)GW8-72.5 (H)GW8-126
Rated voltage kV 40.5 72.5 126
Rated current A 400, 630, 1250
Rated short time withstand current (4s) kA 8, 20, 31.5
Rated peak withstand current kA 20, 50, 80
1min power frequency withstand voltage (RMS) kV 80 140 185
Rated lightning impulse withstand voltage (Peak) kV 185 325 450
Mechanical life times 2000 2000 2000
Rated terminal mechanical load Vertical N 800 800 800
Horizontal N 200 200 200
Leakage distance per unit withstand voltage Mm/kV 16, for one pole
20, for two poles
25, for three poles
Operating torque of manual mechanism Nm ≤200 ≤200 ≤200
Weight of single pole Kg 120 160 200
Operating mechanism CS8-5 manual operating mechanism or CJ6 horizontal type motor drive mechanism

Related Names
Pole Mounted Isolator Switch | Air Break Disconnect Switch | High Voltage Ground Switch

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