Introduction of automatic transfer switch

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Introduction of automatic transfer switch
09 09 , 2022
Category:Application

Automatic Transfer Switching Equipment ATSE (Automatic Transfer Switching Equipment) consists of one (or several) transfer switch appliances and other necessary electrical appliances to monitor power circuits (loss of voltage, overvoltage, undervoltage, phase loss, frequency offset, etc. .) and automatically switch one or several load circuits from one source to another. In the electrical industry, we also call it “Dual Power Automatic Transfer Switch” or “Dual Power Switch”. ATSE is widely used in hospitals, banks, power plants, chemical industry, metallurgy, airports, docks, office buildings, hotels, shopping malls, gymnasiums, military facilities and other occasions.
Classification: ATSE can be divided into two levels, PC level and CB level.
PC ATSE grade: only completes the automatic conversion function of dual power supply, and does not have the function of breaking short-circuit current (only connecting and carrying);
CB ATSE level: not only completes the automatic conversion function of dual power supply, but also has the function of short-circuit current protection (can be switched on or off).
ATSE is mainly used for primary loads and secondary loads, that is, to ensure the power supply of important loads;
Primary load and secondary load mostly exist in the case of grid-grid and grid-generator coexistence.
ATSE working mode is self-switching, self-switching (or mutual backup), which can be selected according to user needs.
Automatic switching: when it is detected that there is a deviation in the public power supply (loss of voltage, overvoltage, undervoltage, phase loss, frequency deviation, etc.). ), ATSE automatically switches the load from the common power source to the backup (or emergency) power source; if the public power source returns to normal, the load will automatically return to the public power source.
Self-switching (or mutual backup): When detecting the deviation of the common power supply, the ATSE will automatically switch the load from the common power supply to the standby (or emergency) power supply; if the common power supply returns to normal, the ATSE cannot automatically return to the common power supply, only in the The ATSE can only return to normal power after backup (or emergency) power failure or manual intervention.

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