Can the intermediate relay contact be engaged for a long time?
Any relay, contactor are allowed to engage for a long time.
Generally according to the needs of the work, can be long-term pull
Any relay, contactor are allowed to engage for a long time, but need to consider the contact can withstand the size of the current, temperature and other factors.
Certainly can be a long time to pull, why he called the relay, he is just a protective device that requires the circuit to work properly.
