GN27-35(C)(D) series indoor high voltage isolating switch

Series indoor high-voltage isolating switch Series indoor high-voltage isolating switch (hereinafter referred to as the isolating switch) equipped with a manual operating mechanism (hereinafter referred to as the manual mechanism) is an indoor high-voltage switching electrical equipment, suitable for rated voltage, three-phase AC networks, as It is used for opening and closing circuits when there is voltage but no load.
1. Environmental conditions of use
The altitude should not exceed 1 meter.
The ambient temperature is ℃℃.
The daily average relative humidity is not greater than that, and the monthly average is not greater than that.
The daily average value of saturated water vapor pressure is not greater than the monthly average value and is not greater than the
level of pollution in the environment.
No frequent and violent vibrations.
Specifications and main technical parameters of the second isolating switch
Model
Rated
Voltage
Maximum operating voltage
Rated
Current
Thermal stable current
Effective value
Dynamic stable current
Peak value
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The structure and working principle of the three-isolation switch
This type of isolation The switch is a three-phase common chassis blade switch. As shown in the figure, it can be divided into chassis insulators and conductive parts. The chassis is composed of a rotating shaft, a frame welded by bent plates and angle steel, and six porcelain insulators are fixed on the chassis. , each two constitute one pole, and the center distance between the phases is. The rotating shaft is equipped with a three-phase operating insulator, which is used to operate the three-phase switch blade opening and closing movement. The conductive part is composed of a contact blade and a contact base. The contact is There are counter and counter contact pieces, which are pressed by spring steel wires. The contacts can swing up and down. Each phase has a blade installed on the contact base and pressed by springs.
When opening, the operating arm drives the rotating shaft to rotate, causing the operating insulator to push upward against the knife switch to separate the knife and the contact. The knife rotates around the contact base and turns to the closing position together.
This type of isolating switch is operated by a manual mechanism and can be installed on the left or right side of the isolating switch.
Four Installation and Adjustment
This series of isolating switches can be installed horizontally, vertically or tilted, but the installation position should be such that the contact knife tends downward when it is opened.
After unpacking, immediately check whether the product is consistent with the order form and whether the accompanying technical documents are complete.
Before installation, the dust on the switch should be carefully wiped, the contact surface and terminals should be inspected, and a layer of industrial Vaseline should be applied.
The isolation switch is equipped with an operating mechanism, and can also be equipped with other mechanisms that can meet the requirements.
A limited stop is welded on the main shaft of the isolation switch. In the opening and closing position, the stop is in contact with the chassis.
During installation, the grounding point should be wiped clean, coated with industrial Vaseline, and properly grounded with the grounding screw provided on the switch.
The isolating switch has been adjusted before leaving the factory. When installing, the user only needs to ensure that when the main shaft rotates to open and close, the stop should be in contact with the chassis. If parts need to be replaced or the product is disassembled and reassembled for other reasons, this should be ensured< br/>The different periodicity of the three-phase opening and closing is not greater than 1. This requirement can be achieved by adjusting the clamping fork on the operating insulator.
Use a nut to compress the compression spring on the contact seat. The size of each spring after pressing with two spring caps should be.
The installation height of the isolating switch is generally the distance from the isolating switch shaft to the ground. When determining the installation position of the isolating switch, it must be noted that the distance between the live part of the isolating switch and the ground is not less than when opening and closing.