Description

YEQ***3 type auto transfer switch(shorten as ATS) is suitable for dual power supply system of AC *0Hz, rated operational voltage **0V and below, can complete the switching over between normal source and standby power source through automatic or manual operation mode. The switch is mainly applicable to important places such as hospital, store, bank, chemical industry, metallurgy, high-rise building and military installations where power off is forbidden
 

 
 
Use of Operates and supports
 Whether main power or backup power with voltage or not, all can be by manual mode operated.Under manual, put the auto- manual button to  manual position, pull the handle by clockwise to end, Backup power implementation  circuit breaker Qr is OFF, implementation of MAIN power supply circuit breaker Qn ONg; When pull handle counterclockwise to the end, the implementation of  Backup power source Qr is ON, implementation of MAIN power supply circuit breaker Qn is OFF;Set the auto position, if the MAIN power is normally, ATS will transfer  to MAIN power working.  The MAIN POWER indiacation will bright on panel;If the MAIN power is unusually, ATS will transfer
to Backup Power ***** Backup indication will be bright on the panel.
   ATS  has 1A of two units  fuses and a electric connector, fuse as short-circuit protection in automatic *****  connecto as dry contact in  Indication light to panel of  controller box, voltage of **0V AC, l*0mA , the detail please reference to instruction. 
Fault Analysis and Removal
When ATS  under automatic control state, the POWER condition was changed, but  the operation mechanism no action. Such as MCB can`t closed-transition or open-transition, then should be checked:
(1) whether the power grid are failured;
(2) whether the wiring shedding;
(3) the fuse itself whether burning. If the front point of one circuit breaker with electricity, and the connection are botht wiring well, fuses are intact, but yet  can not closed-transition or open-transition.You should be asked to professionals or contact manufactory.