Strange Metering Problem

[Manator]

A couple of months ago I installed a sub main and new board in an industrial unit, this was to be sub let by the landlord.

Today I received a call asking if I could go and have a look as the meter was not recording properly and it showed a fault " Low Line Voltage". When I arrived the meter just showed a load of X's across the top line and equal amount of squares or 0's along the second line. I have tested the 100/5 CT's and they are working properly, the fuses are fine and all connections OK.

Has anyone seen this problem before? I am totally confused. I just said that thee meter must be faulty, but as I fit the CT's they think its down to something I have done.

 

[Essex1]

Did you test the voltage?

 

[Manator]

Yes I did a full diagnostic range of tests, all as expected and nothing unusual.

 

[kerching]

Cts wrong way around...possibly even just one of them?

does meter need 'telling' that it is in CT mode?

just thinking

 

[Manator]

All the CT's are fine, the meter was working as far as I know up to this last week when the low line voltage was seen as an error. It is now showing no error other than the screen just shows xxxxxxxxxxx

                                                             00000000

Not seen it before.

 

[Essex1]

Sounds like you were correct then. Dodgy meter. 

 

[Tony S]

So the meter worked fine until this morning.

It’s Sunday, who checks the meter on a Sunday? The landlord.

Who reported the fault? The landlord.

Twiddling fingers on an interactive meter = bo**oxs output. Reset to factory default and start again.

 

[Manator]

@Tony S I got the call on Friday and was out with family on Saturday so could only get there on Sunday.

The landlord is blaming me for not connecting the CT's properly though they worked before.

 

[binky]

some of the 3 phase meters have all sorts of options for being set-up via button on the front, would be worth checking the manual for the meter

 

[Manator]

He called me today, the Landlord saying he was getting another electrician out today. If he found any faults he would pass the cost onto me.

I told him to do his best and goodbye.

Its the meter, and I told him. I would love to find out what happened, but I doubt he will call me again.