GN22—10/3000~6300A high voltage isolation switch

/High-voltage isolation switch - product introduction
/High-voltage isolation switch is designated as three-phase or single-phase AC
for indoor installation. It is used for indoor high-voltage equipment to cut off and close high-current lines when there is voltage and no load. It can be used in generator circuits.
Second product applicable scope
Environmental conditions are as follows
Altitude
Ambient temperature ℃
Relative humidity does not exceed when
Note that when the altitude exceeds meters, or When the ambient temperature is high and ℃, the insulation test voltage and test method of high-voltage electrical equipment and the heating of AC high-voltage electrical equipment during long-term operation should be followed
The switch is not suitable for places with electrical or chemical gases and steam. .
Places with fire or explosion hazards such as mines with gas.
A place where a lot of dust gathers.
Places with strong vibrations and shocks.
Exceptionally humid places and tropical areas.
Three main structural descriptions and dimensions
Structure shown in the picture
This product is a single-pole blade switch. The conductive element of each pole is supported on the chassis by a pillar porcelain bottle, and the contacts The structural design facilitates the arrangement and connection operation of the busbar. The movement series is a conventional four-bar mechanism. The main shaft rotation angle is about 100%. The contact pressure is generated by a specially designed force transmission mechanism and amplified by a lever system composed of magnetic lock plates to improve mechanical and electrical appliances. performance. The lower contacts are bent from copper plates, and the upper contacts are die-cast from copper.
Operating Principle
The difference between this product and traditional structural products is that in order to solve the contradiction between contact pressure and operating force, it adopts the two-step closing and locking action principle, that is, the front angle of the main shaft transmission The displacement is the closing angle. It is used to drive the contact knife to move from the breaking limit position to the closing limit position. The back angle displacement of the main shaft drive is the contact angle. It is used for locking mechanism action and drives the connecting rod to move through the slider. As a result, the ejector pins on both sides are pushed out, and the magnetic lock plate acts as a lever, amplifying the thrust of the ejector pin and pressing it against the contact knife to form contact pressure.
The conversion of the two-step action, the positioning mechanism composed of the rocker lock box, ensures that after the contact knife is closed and in place, the rocker is pushed by the block to the position shown in the picture and then switches to the locking movement , so that the switch can accurately and flexibly switch from the first step of closing to the second step to form contact pressure to complete the entire closing operation.
The action process of the opening operation is opposite to the above-mentioned closing process.
Four specifications and main technical parameters
Rated voltage
Rated current
Rated peak withstand
Current
Rated short-time withstand
Current< br/> Rated short-circuit duration
Weight
Five isolation switch spacing technical requirements
Spacing
/Spacing
Six installation and debugging
Installation should be carried out before installation Inventory the products and accessories, carefully wipe the dirt off the switch, inspect the contact surfaces and terminals, and apply a layer of industrial Vaseline.
The product can be installed in horizontal, vertical and inclined positions.
No matter what kind of operating machine is used, it is necessary to ensure that the magnetic lock plate is pushed out by the push rod at the end of the operation, the spindle is driven to the extreme position, and the stop is in contact with the chassis.
During installation, the grounding point should be wiped clean and coated with industrial Vaseline, and properly grounded with the grounding bolt provided on the switch.
The product has been accurately adjusted before leaving the factory, and users generally do not need to make any further adjustments. If necessary, follow the steps below to adjust the set screw on the slide block and pull out the pin connecting the rocker arm and the tie rod. You can turn the adjusting lever to adjust the three phases to be no greater than the distance between the three phases and the fracture.
When the switch is in the closing state, the first step is completed. When the second step is about to begin, adjust the adjusting screw on the rocker so that the slope of the rocker contacts the ejector pin. This ensures that the two-step action and three poles can be converted at the same time.
By tightening the bolts on the transmission side and the disconnecting magnetic lock plate, the contact pressure and maximum operating torque can be adjusted, and a small and reasonable gap between the contacts and blades can be ensured, so that there is a certain amount of clearance during the closing and opening processes. friction. Generally, it only needs to be adjusted until the switch is about to start the second step of locking, so that the distance between the magnetic lock plate and the end of the ejector rod can be measured with a feeler gauge, and the above three can all be in the best range at the same time.