隔离开关也是发电厂和变电站中常用的开关电器，它需与断路器配套使用。因其

Disconnector is also a commonly used switch electrical appliance in power plants and substations, it needs to be used in conjunction with circuit breakers. Because it has no arc extinguishing device, it cannot be used to switch on and off the load current and short-circuit current. <br>The working characteristic of the isolating switch is to open and close the circuit under the condition of voltage and no load current. Its main functions are: <br>(1). Isolation voltage: When overhauling electrical equipment, use the isolation switch to isolate the device under repair from the power supply voltage to ensure the safety of overhaul. <br>(2). Switch-off operation: when the standby bus or bypass bus is put in and the operation mode is changed, the isolating switch is usually used in conjunction with a short-circuiter to cooperate with the operation to complete <br>(3). Opening and closing of the small current: because the isolating switch has certain points, The ability to combine small currents and capacitor currents, so it can generally be used for the following operations: open and close surge arresters, voltage transformers and no-load bus; open and close transformers with open and closed excitation currents not exceeding 2A; closing capacitor currents not exceeding 5A No-load line. <br>Compared with the short circuit breaker, the selection items of rated voltage and rated current and the verification of short-circuit dynamic stability and thermal stability are the same. However, because the isolating switch is not used to connect and cut off the short-circuit current, there is no need to verify the breaking current.

The isolation switch is also a common switching appliance in power plants and substations, which needs to be used in conjunction with circuit breakers. Because of its non-arc-breaking device, it cannot be used to turn on and cut off load current and short-circuit current. <br>The working feature of the isolation switch is that in the case of voltage, no load current, the separation and integration circuit. Its main functions are: <br>(1) Isolation voltage: When overhauling electrical equipment, the isolation switch will be provided with the installation of the service and the supply voltage isolation to ensure the safety of the maintenance.<br>(2) Reverse operation: put into the backup bus or bypass bus and change the mode of operation, the common isolation switch with the short-circuiter, co-operation to complete<br>(3) Sub, joint small current: because the isolation switch has a certain degree of fraction, small current and capacitive current capacity capacity, it can generally be used to carry out the following operations: fraction, lightning arrester, voltage transformer and empty carrier bus; <br>Compared with the short-circuit erstal, the isolation switch is the same as the item of rated voltage, the choice of rated current and the short-circuit stabilization and thermal stability check. However, since the isolation switch is not used to turn on and cut short-circuit current, there is no need to verify the power-off flow.

Disconnectors are also commonly used in power plants and substations. They need to be used with circuit breakers. Because it has no arc extinguishing device, it can not be used to connect and cut off load current and short circuit current.<br>The operating characteristics of the disconnector is to open and close the circuit with voltage and no load current. Its main functions are:<br>(1) . isolation voltage: during the maintenance of electrical equipment, use the isolation switch to isolate the equipment under maintenance from the power supply voltage, so as to ensure the safety of maintenance.<br>(2) . switching operation: when the standby bus or bypass bus is put into operation and the operation mode is changed, the common isolating switch shall cooperate with the short circuit breaker to complete the operation<br>(3) . opening and closing small current: due to the ability of opening and closing small current and capacitor current, the disconnector can be used for the following operations: opening and closing arrester, voltage transformer and no-load bus; opening and closing no-load transformer with excitation current not more than 2A; closing no-load line with capacitance current not more than 5A.<br>Compared with the short circuit breaker, the selection of rated voltage and rated current of the disconnector and the verification items of short circuit dynamic stability and thermal stability are the same. However, the disconnector is not used to connect and cut off the short-circuit current, so it is not necessary to check the breaking current.<br>