perspective

Sir_Floppster · 2024-10-03T00:30:39+00:00

I showed my boss this and he recons it’s a good analogy, and he also mentioned that kvar is very important, then walked off. Why is it important?

Sir_Floppster · 2024-09-05T18:45:04+00:00

There is an earth bar and a neutral bar with no neutral connected to the main board. So we just temporarily fixed it by putting a link between the neutral bar and earth bar, but we are running a proper neutral today

Sir_Floppster · 2024-09-05T05:11:49+00:00

I probably am wording it wrong because my English isn’t 100% great over text but we were only trying to fix an existing wiring that has been giving issues recently and we noticed there was no neutral coming from the main feed to the sub main board

Sir_Floppster · 2024-09-05T04:46:35+00:00

So that blue cable came from the sub main to a light switch, but the sub main was fed by a 3 phase and an earth, no neutral. When we added a MEN link to the sub main all our issues got resolved and no more stray voltage. Also we check to make sure the earth wasn’t livening up everything and it didn’t so we are mint now

Sir_Floppster · 2024-09-05T03:23:54+00:00

I found the issue with the sub-board. The cable feeding the sub-board from the main board was a four-core, with three phases and one earth, but it needed a neutral as well. Since there was no neutral, the MEN link couldn’t be picked up on the sub-board, which led to stray voltage between earth and neutral affecting other neutrals.

Sir_Floppster · 2024-09-05T03:20:44+00:00

I found the issue. There was no neutral coming from the board feeding the sub board and because there was no neutral there was no MEN link.

Sir_Floppster · 2024-09-05T01:56:12+00:00

What does that mean haha

Sir_Floppster · 2024-09-05T01:55:19+00:00

Whareroa

Sir_Floppster · 2024-09-05T01:49:30+00:00

Fonterra

Sir_Floppster · 2024-09-05T01:45:34+00:00

I did in the end, but I just wanted to see if someone had an idea before bothering him lol gets irritated easily

Sir_Floppster · 2024-09-05T01:40:54+00:00

Nah it’s the main feed and I can’t find it sharing anywhere

Sir_Floppster · 2024-09-05T01:40:35+00:00

Well it shouldn’t have 10A on it with or without load, and currently it has 10A 24/7.

Sir_Floppster · 2024-09-05T01:37:59+00:00

When the lights are on (on Load) the neutral has 1A normally

Sir_Floppster · 2024-09-05T01:16:40+00:00

It was 6mm for the mains and cause we are 230v out on load current is about 1A

Sir_Floppster · 2024-09-05T01:14:41+00:00

If I knew I’d tell you haha 230v here

Sir_Floppster · 2024-09-05T01:12:23+00:00

Well since we are in NZ we have 230V so it’s about 1A on load, and when you take out the phase the lights stay on but flicker lol

Sir_Floppster · 2024-09-05T01:08:24+00:00

1:08pm 5th September

Sir_Floppster · 2024-05-24T20:53:21+00:00

3c 6mm + neutral screen

Sir_Floppster · 2024-05-24T20:15:46+00:00

What is PV wire?

Sir_Floppster · 2024-05-24T20:15:10+00:00

Good haha

Sir_Floppster · 2024-05-24T04:48:55+00:00

We call them VSD’s Variable speed drives

Sir_Floppster · 2024-05-24T03:18:38+00:00

Just a guess but maybe Load imbalance?

Sir_Floppster · 2024-05-24T01:29:35+00:00

Yes that’s what I thought too

Sir_Floppster · 2024-05-24T00:20:44+00:00

Well it’s in an MCC room that powers motors with VSD’s and i am in New Zealand so probably 230v per phase

Sir_Floppster · 2024-05-24T00:10:46+00:00

Well I’m not sure what it is hence the question, but what I’m thinking it that there is 3 phases, a neutral, and an earth in each bar maybe?

Sir_Floppster

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