GE electromechanical relays - prone to dropping flag from vibration
GE electromechanical relays - prone to dropping flag from vibration
(OP)
For Westinghouse electromechanical relays, the flag drops easily due to vibration.
Can the same thing happen for GE electromechanical relays?
Can the same thing happen for GE electromechanical relays?
=====================================
(2B)+(2B)' ?






RE: GE electromechanical relays - prone to dropping flag from vibration
RE: GE electromechanical relays - prone to dropping flag from vibration
I looked at one and had a hard time understanding how that could happen. Unlike the Westinghouse where flag moves down, the GE flag must move up.... and the only thing that pushes it up is the contact arm. Contact arm I believe is balanced in such a manner as to be not susceptible to vibration (to avoid sensitivity to spurious trip). I was unable to cause flag the contact arm to move, much less flag to drop during my attempts at mechanical agitation with relay on the bench.
=====================================
(2B)+(2B)' ?
RE: GE electromechanical relays - prone to dropping flag from vibration
should've been:
=====================================
(2B)+(2B)' ?
RE: GE electromechanical relays - prone to dropping flag from vibration
RE: GE electromechanical relays - prone to dropping flag from vibration
RE: GE electromechanical relays - prone to dropping flag from vibration
I've experienced this on a large MV Fan Motor starter where the fan
was located adjacent to the MCC room.
During startup, as the fan accelerated through its critical speed, the panel vibrated in sympathy causing the relay to unlatch.
Problem was solved by mounting the relay housing on rubber pads.
It was a vintage GEC electromechanical motor protection relay.
RE: GE electromechanical relays - prone to dropping flag from vibration