Exit isolation switch
When a disconnecting switch is in a position, the contact between the contact is met with the required insulation distance and a marked disconnection mark; In a closed position, the current under the normal circuit condition and the switching device of the current under the specified time, such as a short circuit.
The high voltage isolation switch is different according to the way it is installed, it can be divided into outdoor high voltage isolation switch and indoor high voltage isolator switch. Outdoor high voltage isolator is the ability to withstand the effects of wind, rain, snow, dirt, condensation, ice and thick frost, suitable for the high voltage disconnecting switch installed on the patio. According to its different insulation support structure can be divided into single column type isolating switch (single - column disconnector), double column type isolating switch (double - column disconnector), three column type isolating switch (three - column disconnector). Below the trolley bus directly to the breaker of single-column vertical space used for electrical insulation of the fracture, therefore, has the obvious advantages, is to save area, reduce the lead wire, at the same time points switching state particularly clear. In the case of ultrahigh voltage transmission, the effect of saving land area is more remarkable after the single-column type of blade switch is adopted by the transformer.
When an electrical equipment is repaired, an electrical interval is provided, and a visible break point is provided to ensure the safety of the maintenance personnel.
2. Isolating switch can't load operation: can't take the rated load and large load operation, not points, load current and short-circuit current, but have the arcing chamber can be operated with small load and no load circuit.
General electric transmission operation: first, the disconnecting switch, the rear circuit breaker or the load class switch. Power failure operation: first disconnecting the circuit breaker or load class switch, then disconnecting switch.
4. When it is no different and other electrical equipment, all is the rated voltage, rated current, dynamic stability and thermal stability of current and so on all have to conform to use needs. The function of isolating switch is disconnected no-load current, circuit. Make the maintenance of equipment and power supply is an obvious disconnect point, to ensure the safety of maintenance personnel, there is no specific arc extinguishing device isolating switch can't cut off the load current and short circuit current, so you have to disconnect the circuit in the circuit on the circuit breaker can operate under the condition of isolating switch.