TVRMS2 digital link open with CB in Test Position (Epic MVT)

[SecondGen]

Came across an interesting scenario today while secondary injection testing some GE AKRU breakers using the TVRMS2. Has anyone ever got the error “digital link open” on the test kit while trying to test Epic MicroVeraTrips on draw-out breakers in the test position?

Seems to me like there is something wrong here and I had this happen on a couple different units. Once the breaker is in the disconnected position the error goes away and I can test with no problem. I wasn’t able to find anything in the TVRMS-2 user manual except for “Digital link open” means there is no trip unit connected (obviously).



The switchboard is equipped with the Field Programming Package which might be causing the problem. If I had to guess I would say there is a secondary pin somewhere with voltage on it that is opening the digital link.

Has anyone else come across something similar?

[Zog]

Came across an interesting scenario today while secondary injection testing some GE AKRU breakers using the TVRMS2. Has anyone ever got the error “digital link open” on the test kit while trying to test Epic MicroVeraTrips on draw-out breakers in the test position?

Seems to me like there is something wrong here and I had this happen on a couple different units. Once the breaker is in the disconnected position the error goes away and I can test with no problem. I wasn’t able to find anything in the TVRMS-2 user manual except for “Digital link open” means there is no trip unit connected (obviously).



The switchboard is equipped with the Field Programming Package which might be causing the problem. If I had to guess I would say there is a secondary pin somewhere with voltage on it that is opening the digital link.

Has anyone else come across something similar?

Usually that means a bad rating plug

[stevepieroski]

Came across an interesting scenario today while secondary injection testing some GE AKRU breakers using the TVRMS2. Has anyone ever got the error “digital link open” on the test kit while trying to test Epic MicroVeraTrips on draw-out breakers in the test position?

Seems to me like there is something wrong here and I had this happen on a couple different units. Once the breaker is in the disconnected position the error goes away and I can test with no problem. I wasn’t able to find anything in the TVRMS-2 user manual except for “Digital link open” means there is no trip unit connected (obviously).



The switchboard is equipped with the Field Programming Package which might be causing the problem. If I had to guess I would say there is a secondary pin somewhere with voltage on it that is opening the digital link.

Has anyone else come across something similar?

Ive had the same thing happen in a emergency call and then after further investigation i realized it was the cord causing the issue and ordered a replacement and haven't had an issue unless i use the bad cord.

[marvinray]

Ive had the same thing happen in a emergency call and then after further investigation i realized it was the cord causing the issue and ordered a replacement and haven't had an issue unless i use the bad cord.

If i'm not mistaken, this is just a standard male-to-male 1/8" stereo cord. Not sure what you paid but they can usually be found at any electronics store.

[stevepieroski]

If i'm not mistaken, this is just a standard male-to-male 1/8" stereo cord. Not sure what you paid but they can usually be found at any electronics store.

I got it from radio shack a few bucks nothing serious.

[SecondGen]

Ive had the same thing happen in a emergency call and then after further investigation i realized it was the cord causing the issue and ordered a replacement and haven't had an issue unless i use the bad cord.

Thanks, but I know the cord was good in this case because I was able to test many other breakers without a problem. For some reason when certain breakers were racked into test, I would get the error. This tells me it has to be something in the secondary wiring of the switchgear that is tied into the trip unit somehow.