ANSI 25 Synchro-check Problem.

[rayas91]

Hi guys,

I was trying to synhronize two lines. Voltage difference-frequency difference and angle difference is almost 0. Values are always within limits. But relay inconsistenly gives Synchron OK.
Sometimes it gives "OK", sometimes NOT. And there s no specific time for giving Synchron OK signal. I used another relay and it was same.
I m so confused. Dont know what to do.
Do you have any idea about that ?

Thank you for all.

 

[davidbeach]

Ask the relay, not us. It knows. Set it to trigger an event report when it changes state from one to the other and see what's going on.

 

[dpc]

Modern digital synch-check functions have a lot of confusing options regarding other variables that the relay can compute. I'd take a long look at the configuration file and make sure you understand all the settings. As David said, the relay can probably tell you what it's unhappy about if you ask the right question.