GEC Alstom Relay Settings

A simple telephone call to wherever it was purchased from would yield that help. A telephone call is interactive, fast, and one speaks to a real person. Highly recommended.

I'm assuming that the operators manual has been devoured by your canine?

As PWSlack suggested, the supplier will have "ANyone with experience on this particular relay", and they may respond to your request to, "please help out".

That is if you ever make a request.

Waiting here for, "ANyone with experience on this particular relay" may prove a futile effort.

If you are intimidated by the phone, an internet search may prove helpful, and then there's always snail mail.

No one should help you except someone well experienced in commissioning that device, if you pay them enough they may let you look over their shoulder.

Before you set the relay, you have to know your settings are correct, and that's the easy part. You also have to verify that all the instrumentation transformers are wired correctly and that their polarities were checked; you also need to know that the actual voltages across the breaker contacts are exactly the same as those reported to the terminals of the relay.

This is NOT a "plug and pray" device, any error is a threat to personnel and property. Better to be a thousand times cautious then one time dead...

What is the complete model & serial number of the relay?

We use a very broad spectrum of Alstom protective relays in our power generation and distribution systems so we may have the information you need.

Hopefully the protection settings you are attempting to enter were originated from a competent, experienced engineering source that is thoroughly familiar with the required protection scheme for the application and your site.

If not; It would be in your best interest to get in contact with the relay protection group at your site or if there is not one available, hire one of the many available consulting companies to analyze the application and provide the correct settings.

Alstom Relay

GEC MAVS Relay

MAVS02D1AB0751D

158128J

Many thanks for your assistance.

I do not have experience on this type relay but it sounds like check or permissive relay for a parallel connection of two supplies which come by different routes from the same ultimate source. The two supplies have the same frequency, but could have a phase or voltage difference because of the different loadings or tap settings on the two routes.

If the supplies were paralleled by a breaker, the voltage and phase difference will cause a current to flow which might be excessive and trip other relays or initiate an instability.

The settings of your relay should prevent such an event and cause the operators to take measures to reduce the mismatch.

Working out the acceptable maximum angle and voltage settings is a system analysis job, which needs a lot of knowledge of the system.

You need to ask the system designer, I do not think it is in your remit.

67model