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Type: Posts; User: Besoeker3

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1. ## Thread: Does 208V 100A 3ph input approx. equal 480V 30A 3ph output for a step-up transformer?

by Besoeker3
Replies
10\$\$
Views
277

### Actually, you don't need either.

Actually, you don't need either.
2. ## Thread: Does 208V 100A 3ph input approx. equal 480V 30A 3ph output for a step-up transformer?

by Besoeker3
Replies
10\$\$
Views
277

### VA, not W And all you need to do is multiply the...

VA, not W
And all you need to do is multiply the current by the voltage ratio.
That gives you the 43.3A
3. ## Thread: Harmonics and PF

by Besoeker3
Replies
3\$\$
Views
83

### Depends on what you call fairly low. With a good...

Depends on what you call fairly low. With a good sized DC choke and nearly level DC current, the current harmonics are roughly the reciprocal of the harmonic number.
For a six-pulse rectifier front...

by Besoeker3
Replies
5\$\$
Views
199

:p
5. ## Thread: how to measure amps on 4160V motor

by Besoeker3
Replies
11\$\$
Views
633

### No issues that I'm aware of. But being from UK we...

No issues that I'm aware of. But being from UK we don't work with the NEC.
6. ## Thread: how to measure amps on 4160V motor

by Besoeker3
Replies
11\$\$
Views
633

### Agreed. We Grossen Metrawatt power analysers in...

Agreed. We Grossen Metrawatt power analysers in our MV panels.
7. ## Thread: Student, have a few questions about breakers/ power in general

by Besoeker3
Replies
12\$\$
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668

### Why not just stick with kW? Power is power. For...

Why not just stick with kW?
Power is power.
For me, and most of the rest of the world, HP is a redundant unit.
8. ## Thread: Delta Wye Transformer Phase to Phase Fault

by Besoeker3
Replies
4\$\$
Views
254

### Could it be tripping on unbalanced phase voltages...

Could it be tripping on unbalanced phase voltages like phase loss?
9. ## Thread: 3 phase motor problem

by Besoeker3
Replies
15\$\$
Views
620

### Good point. I did the calcs and they don't equate...

Good point. I did the calcs and they don't equate to 5HP (3.7kW) motor.
10. ## Thread: 3 phase motor problem

by Besoeker3
Replies
15\$\$
Views
620

### Yes, that would be my starting point. That and...

Yes, that would be my starting point. That and the voltage. It could be a bad connection somewhere/anywhere on the supply side.
Or just a bad motor. How much would it cost to replace it? Probably...

by Besoeker3
Replies
17\$\$
Views
885

### Max breaker? I don't want to break Max.......:D...

Max breaker?
I don't want to break Max.......:D

Sorry mods...........:(
12. ## Thread: Can a wye generator run a delta system?

by Besoeker3
Replies
22\$\$
Views
926

### That would have been helpful information at the...

That would have been helpful information at the outset.
13. ## Thread: 3 phase voltage

by Besoeker3
Replies
18\$\$
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663

### The OP says it is ungrounded.

The OP says it is ungrounded.

by Besoeker3
Replies
20\$\$
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843

### Thank you, LF. My ignorant Brit brain is...

Thank you, LF.
My ignorant Brit brain is constantly being upgraded here.......:D

by Besoeker3
Replies
20\$\$
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843

SEWAG?

by Besoeker3
Replies
20\$\$
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843

How hot?

by Besoeker3
Replies
12\$\$
Views
715

### Good question. I'm with Junkhound on this. I...

Good question. I'm with Junkhound on this. I can't see a gate opener taking anything like 30A.
18. ## Thread: 150HP motor & pump issues ( Pump looses pressure )

by Besoeker3
Replies
16\$\$
Views
744

### I'll try not to get steamed up about...

I'll try not to get steamed up about it..............:p
19. ## Thread: 150HP motor & pump issues ( Pump looses pressure )

by Besoeker3
Replies
16\$\$
Views
744

### OK, pedant strikes again - and will probably get...

OK, pedant strikes again - and will probably get shot down for it again......:D

These are not metric units, they are SI (SystÃ¨me international).
You can't measure Watts by the metre.
20. ## Thread: 150HP motor & pump issues ( Pump looses pressure )

by Besoeker3
Replies
16\$\$
Views
744

### If the motor slowed down significantly, the...

If the motor slowed down significantly, the current rise, probably to tripping levels.
I'd be inclined to think it is a hydraulic issue.
21. ## Thread: Reducing electrical usage for fairgrounds

by Besoeker3
Replies
17\$\$
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1,076

### Can't these transformers turned off instead of...

Can't these transformers turned off instead of left energised? A simple isolator on the primary of each.

by Besoeker3
Replies
9\$\$
Views
479

### I agree. That's their purpose in life. Think...

I agree. That's their purpose in life. Think about what the U stands for.
23. ## Thread: Identify a relay?

by Besoeker3
Replies
21\$\$
Views
907

### That's a relay??

That's a relay??

by Besoeker3
Replies
20\$\$
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1,350

### Like your sense of humour - and, yes that's how...

Like your sense of humour - and, yes that's how we spell it........:)

A bigger challenge than altitude for us was ambient. Many of the switch rooms had aircon. But not the tin mining dredgers up...
25. ## Thread: Big Ass Fan disconnecting means

by Besoeker3
Replies
8\$\$
Views
531

### Are you talking about the input power to the VFD...

Are you talking about the input power to the VFD or the output from the VFD to the motor?
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