切换电流是指继电器在开路和闭合触点时能可靠处理的最大电流。
Switched current is the maximum current that can be handled reliably while opening and closing contacts.
当采用冷切换时，触点的寿命要长许多。
作为技术指标，如果在最大信号电平下采用冷切换而非热切换，那么触点寿命将会从105次开关次数延长至108次开关次数。
As the specifications state, if cold switching is used instead of hot switching at maximum signal levels, contact life is extended from 105 closures to 108 closures.
对于相对较大的继电器，为了确保触点良好闭合，也可能必须采用热切换。
With relatively large relays, it is even possible that hot switching must be used to ensure good contact closure.
若切换小于最大信号电平的信号，触点寿命将介于105到108之间。
Switching at less than the maximum signal levels yields a contact life between 105 and 108 closures.
对五种典型的变压器分接开关用真空触点切换开关电路进行了分析。指出了各种电路的适用范围和最佳电路。
Five typical circuits for the vacuum contact diverter switch used in transformer tap - changer are analyzed. The optimum circuit and application range of every circuit are presented.
对五种典型的变压器分接开关用真空触点切换开关电路进行了分析。
Five typical circuits for the vacuum contact diverter switch used in transformer tap - changer are analyzed.
电压软切换通过软件智能识别、选择工作母线，完成母线电压快速无触点切换。
Soft switch of voltage can identify and select working bus intelligently by software, and switch the bus voltage immediately without any contact.
设计了一种新型模拟电压可切换无触点开关电路。
A new analog voltage contact-less switch circuit is designed.
在实际工程中，同期电压的取法采用的是“近区电压优先原则”，并使用相关的隔离开关和断路器的辅助触点来实现电压的切换。
In engineering application, the selection of the synchronism voltage is usually according to the principle that the nearest voltages are prior.
冷切换可以延长触点寿命，最大时可将触点寿命提高10 ~ 100倍。
Cold switching is desired to extend contact life. It can increase contact life by 10-1000 times over switching at maximum levels.
冷切换可以延长触点寿命，最大时可将触点寿命提高10 ~ 100倍。
Cold switching is desired to extend contact life. It can increase contact life by 10-1000 times over switching at maximum levels.
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