A.The isolating switch and the circuit breaker play the same role in the system

B.The circuit breaker mainly plays the dual role of isolation and protection in the system

C.The leakage protection circuit breaker is not recommended to be used in the front end of the UPS system

D.When selecting circuit breakers, do not consider redundancy

A.Remove and clean the water supply valve

B.Remove the drain and drain valve assembly

C.Disconnect the water supply valve drain valve wiring

D.Replace hard and brittle hoses and flush drains thoroughly

A.True

B.False

A.DO output dry contact

B.3G/4G antenna interface

C.RS485 port

D.RF_ZA wiring port

A.0.03

B.0.01

C.0.02

D.0.05