The GW4-20 series outdoor high-voltage isolation switch is a maintenance free outdoor AC high-voltage isolation switch with light operating torque, manufactured in accordance with GB1985-89 "AC High Voltage Isolation Switches and Grounding Switches" and the specific requirements of electrified railways. Rated current: 200, 400, 630, 1250A. Suitable for use in power systems with a frequency of 50Hz and a rated voltage of 20KV, as a time division circuit with voltage and no load, and also for use in railway automatic block signaling devices. And it can be used at a single level. The anti fouling isolation switch can meet the requirements of users in heavily polluted areas and effectively solve the problem of pollution flashover that occurs during the operation of the isolation switch.
The GW4-20 (G) TQ (D) (A) (B) series light operating torque maintenance free outdoor AC high-voltage isolation switch is a new generation of outdoor products suitable for railway self closing, through power supply remote control systems and railway station power supply systems. Equipped with CX-1 electric mechanism, it can easily interface with remote control systems to achieve remote control, remote signaling, and remote sensing.
This series of products includes the following varieties:
There are three types of grounding switches: ungrounded, single grounded, and double grounded.
Classified by usage area: ordinary type, stain resistant type, high source type.
This series of products meets the requirements of national standards and IEC standards. This series of products has good earthquake resistance and can meet the requirement of a seismic intensity of 9 degrees (horizontal acceleration of 4.9m/S2 and vertical acceleration of 2.45m/s2).
product structure
The GW4-20 series AC high voltage isolation switch consists of three single-phase components, which have a double column structure and are mainly composed of bottom and pillar insulation and conductive parts. The first phase has two insulated pillars installed on the bearing seats at both ends of the base, connected by cross connecting rods, and can rotate horizontally. The conductive switch is divided into two halves and fixed on the pillar insulator respectively, with the contact point between the two ceramic pillars.
When the operating mechanism is activated, it drives one post of the insulator to rotate 90 degrees, and the other insulating post also rotates 90 degrees simultaneously due to the transmission of the connecting rod, so the switch blade opens and closes in the same direction. To ensure the correct operation sequence between the isolation switch and the grounding switch, a mechanical interlocking device is installed on the product or mechanism to ensure the sequential action of main opening ground closing ground opening main closing.
GW4-20TQ (A) (B) type matching mechanism: CX-1 electric motor mechanism or CS11-1, CS11 (G), CS8-6D manual mechanism