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I may still have a copy of this somewhere, but it is of no use to you without the special interface unit that plugs into the 9 pin port on the relay front. You then connect this to your computer using a standard rs232 lead. If you do not use this interface, then you will damage the relay (from...

Apparently, stressing across an open Vacuum Insulated Circuit Breaker with a DC voltage can produce X-Rays! Most manufacturers testing procedures give a minimum distance to maintain from the equipment under test. Don't think that this applies to AC pressure testing though.

Hi all, In our utility we use Alstom MVAJ type protection lockout relay, mainly for transformer protections eg bucholtz. Relay uses N/O contacts to trip CB, and N/C contacts to break the closing supply. These are hand reset relays, but do use a spare N/O contact to signal SCADA that protection...