I want to know how does the 489 GE relay to detect Drawout Case to generate this alarm. We can not to fix that situation. Thanks.
Drawout case alarm in 489 relay
- Thread starter Jorge Munoz
- Start date
Jorge Munoz,
When did this alarm become active? After the relay was withdrawn from the case?
If my memory serves me correctly, there is a switch or some kind of sensor (non-contact) that checks to see if the relay has been properly inserted/re-inserted into the case after is has been removed (withdrawn). If the relay was not properly inserted/re-inserted into the case then this alarm warns to user that the relay has not been properly installed/re-installed and my result in non-operation or intermittent operation or failure of the relay.
So, it's best to check to make sure the relay has been inserted/re-inserted per the instruction in the manual. I note the manual says the relay and case are keyed, so that if someone tries to insert a relay other than the one which was removed it should not be possible to do so. If a non-matching relay was inserted into a case and the latching mechanism was unduly forced that may also be part of the problem.
Again, this is from memory and it's been many years since I worked on a 489 Multilin relay. I don't recall if the drawout mechanism uses an actual switch (or microswitch) or if it uses some kind of non-contact sensor (like a magnet or something similar) to detect if the relay was properly inserted. It may just be that the latching mechanism actuates a switch or sensor when it is fully engaged in the latched-in position.
Please write back to let us know what you found.
(P.S. I had a read of a couple of the 489 manuals available on the World Wide Web, and they had zero information on this particular alarm function. Typical GE documentation.... )
When did this alarm become active? After the relay was withdrawn from the case?
If my memory serves me correctly, there is a switch or some kind of sensor (non-contact) that checks to see if the relay has been properly inserted/re-inserted into the case after is has been removed (withdrawn). If the relay was not properly inserted/re-inserted into the case then this alarm warns to user that the relay has not been properly installed/re-installed and my result in non-operation or intermittent operation or failure of the relay.
So, it's best to check to make sure the relay has been inserted/re-inserted per the instruction in the manual. I note the manual says the relay and case are keyed, so that if someone tries to insert a relay other than the one which was removed it should not be possible to do so. If a non-matching relay was inserted into a case and the latching mechanism was unduly forced that may also be part of the problem.
Again, this is from memory and it's been many years since I worked on a 489 Multilin relay. I don't recall if the drawout mechanism uses an actual switch (or microswitch) or if it uses some kind of non-contact sensor (like a magnet or something similar) to detect if the relay was properly inserted. It may just be that the latching mechanism actuates a switch or sensor when it is fully engaged in the latched-in position.
Please write back to let us know what you found.
(P.S. I had a read of a couple of the 489 manuals available on the World Wide Web, and they had zero information on this particular alarm function. Typical GE documentation.... )
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