at the time of start motor is like short circuited transformer when you close the breaker heavy current flows thru rotor. during start rotor conductor temp rises , in order to limit permissible rotor bar temp no. of starts limited.
is there any control scheme such that synchro-check relay gets disconnected when it's operation is over .
either relay may remaining in serivce continously that may leading to damage to the relay.
kindly confirm
5p10 CT
rating indicates accuracy limit factor of CT
P indicates CT should used for protection purpose (i.e. for feeding protective relays.
digits 5 & 10 indicate -- error in secondary o/p will within 5 % evenif current flowing through primary is 10 times rated current
hopr this will satisfy...