Applications of Latched type VCs
Applications of Latched type VCs
(OP)
Where are the latched type VC's are used? Are latched type Vacuum Contactors with fuses are equivalent to VCB's? In reactor starter motor feeder, one manufacturer has used latched type VC's? Is there any disadvantage of latched type as opposed to the electrically holding type Vacuum contactor in the reactor starter?






RE: Applications of Latched type VCs
Latched type contactors generally used in combination with the fuse, is a cheaper alternative to the fully equipped circuit breaker. It can be used for the lower current rating applications as generally available rating is 400A. Of late few manufactures started to supply up to 800A. But I personally prefer to go for a circuit breaker above 400A application.
RE: Applications of Latched type VCs
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Applications of Latched type VCs
A feed to a transformer does not create issues like a motor starter if it doesn't trip open during an outage.
RE: Applications of Latched type VCs
There is at least one manufacturer that makes a magnetically latched contactor. It basically uses an electromagnet to create enough force to close it and then the electromagnet is reversed to force it back open. The force to hold the contactor closed comes from a permanent magnet vs a low energy electromagnet circuit like most large contactors use. You might have run into these, and since the contactor design means they always latch, it's the way they have to be.