Data center migration: how to choose dual power automatic switch?

Data center migration: dual power automatic switch is delayed when switching standby power supply. This delay is mainly used to switch from main power supply to standby power supply. However, some electrical equipment has strict requirements on the switching time of dual power automatic switch. Therefore, the switching time of the power equipment must be optimistic when selecting the switch mode of double power supply. The following is the introduction of some electrical equipment on the switch of double power automatic switching time requirements.
(1) double power automatic switch with automatic recovery function, when the main power to restore normal power supply, dual power automatic switch by delay after switching back to the main power supply.

(2) double power automatic switch is generally not allowed large motor or high inductance load switch, this type of load switch in operation, power supply phase difference is large, the motor will have great mechanical stress. At the same time, the overcurrent caused by the back EMF produced by the motor will cause the fuse to fuse or the circuit breaker trip. Therefore, when the double power automatic switch with large electric motor or high inductive load transfer, two groups of moving contacts before the conversion should be added to a delay time, which should be used in delay conversion type double power automatic switch, delay time as the load is determined.
(3) when the generator set is used as the emergency lighting power source, the whole time of generator startup and power conversion should not be greater than 15s., and the automatic switching switch of double power supply should choose the special type of "city electric generator conversion".
(4) when the low voltage power distribution system of substation is single bus section running, and the master switch is set, the total operation time of dual power automatic switching switch should be coordinated with the setting time of the setting switch of the transformer room, which should be greater than the contact switch operation time of 0.5- seconds. The operation time of the master switch in transformer room is mostly 2.5s, and the total operation time of double power automatic switch should be more than 3s.
ATSC dual power automatic transfer switch in engineering has been widely used, correct reasonable choice ATSE can ensure the reliable power supply of important load, ATSE is an indispensable and important link in the important load power supply system, ATSE is currently in China has experienced four development stages, namely, two type contactor two circuit breakers, excitation type special-purpose change-over switch and special electric switch.
(1) two contact type switch for the first generation, is China's first production of dual power switch, it is a simple power supply consists of two contactors lap together, this device because of disadvantages of mechanical interlocking unreliable, large power consumption, so it is more and more less used in engineering.
(2) two circuit breaker type switch for the second generation, is also mentioned in the Chinese national standard and IEC standard CB ATSE, which is composed of two circuit breaker into a mechanical interlock device with short circuit or over current protection function, but not a reliable mechanical interlock.
(3) the excitation type special conversion switch is the third generation. It is an integral device made up of excitation contactor and external controller. The mechanical interlock is reliable, and the switch is driven by the electromagnetic coil to drive the switch. The speed is fast. Electric special switch is the fourth generation, is PC class ATSE, its main body is in line with the isolation switch, for the mechanical and electrical integration of switching equipment, the conversion is driven by the motor, stable and fast conversion, and has 0 bit function.
The trend of ATSE mainly includes two aspects: one is the main switch, with anti impact current ability is very high, and frequent conversion; with reliable mechanical interlocking, ensure that any state power supply not parallel operation; don't allow a fuse or jump off device, to prevent the dual power switch caused by the output end no phenomena due to overload; has 0 functions, and isolation distance, so as to be able to withstand the impact of higher voltage (8KV) above; four level switch with N first and then the function to prevent ATSE when switching, N line potential drift in different systems, the current trend is not consistent or shunt that caused by the residual current protection device malfunction.