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Type: Posts; User: Besoeker3

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1. ## Thread: If a motor runs on 230V at 47A, how many amps will it draw at 208V?

by Besoeker3
Replies
18\$\$
Views
305

### That's the current it runs at which may or may...

That's the current it runs at which may or may not be FLC.
2. ## Thread: If a motor runs on 230V at 47A, how many amps will it draw at 208V?

by Besoeker3
Replies
18\$\$
Views
305

### What is the FLC of the motor?

What is the FLC of the motor?
3. ## Thread: If a motor runs on 230V at 47A, how many amps will it draw at 208V?

by Besoeker3
Replies
18\$\$
Views
305

### Good questions. But there not likely to be a...

Good questions. But there not likely to be a significant drop in speed if the frequency doesn't change.

by Besoeker3
Replies
17\$\$
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390

### One timer and one changeover relay would provide...

One timer and one changeover relay would provide the necessary control circuitry.
5. ## Thread: Where do we use 1.73 when calculating 3 phase power

by Besoeker3
Replies
23\$\$
Views
1,160

### Go with SI. Much simpler.

Go with SI. Much simpler.
6. ## Thread: Where do we use 1.73 when calculating 3 phase power

by Besoeker3
Replies
23\$\$
Views
1,160

### It’s the ratio of VLL to VLN

It’s the ratio of VLL to VLN
7. ## Thread: An interesting story

by Besoeker3
Replies
17\$\$
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784

### Very droll............

Very droll............
8. ## Thread: An interesting story

by Besoeker3
Replies
17\$\$
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784

### Indeed. Quite a few in Scotland, a country with...

Indeed.
Quite a few in Scotland, a country with a tiny population.

https://www.theayelife.com/scottish-inventions/
9. ## Thread: Harmonics and PF

by Besoeker3
Replies
7\$\$
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556

### I know. That's why I said also.

I know.
That's why I said also.

by Besoeker3
Replies
17\$\$
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935

### The ones I'm come across were usually shunt...

The ones I'm come across were usually shunt wound.
I dealt with quite a few in the paper making industry. Many were 4-quadrant meaning they could motor or generate.
11. ## Thread: Harmonics and PF

by Besoeker3
Replies
7\$\$
Views
556

### Yes. AFE is also a good approach but, at nearly...

Yes. AFE is also a good approach but, at nearly the price of a standard VFD, rather expensive.
12. ## Thread: Does 208V 100A 3ph input approx. equal 480V 30A 3ph output for a step-up transformer?

by Besoeker3
Replies
10\$\$
Views
621

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

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

by Besoeker3
Replies
10\$\$
Views
621

### 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
14. ## Thread: Harmonics and PF

by Besoeker3
Replies
7\$\$
Views
556

### 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
7\$\$
Views
534

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

by Besoeker3
Replies
12\$\$
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983

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

by Besoeker3
Replies
12\$\$
Views
983

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

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

by Besoeker3
Replies
12\$\$
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839

### 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.
19. ## Thread: Delta Wye Transformer Phase to Phase Fault

by Besoeker3
Replies
4\$\$
Views
300

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

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

by Besoeker3
Replies
15\$\$
Views
704

### 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.
21. ## Thread: 3 phase motor problem

by Besoeker3
Replies
15\$\$
Views
704

### 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
956

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

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

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

by Besoeker3
Replies
22\$\$
Views
1,022

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

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

by Besoeker3
Replies
18\$\$
Views
738

### The OP says it is ungrounded.

The OP says it is ungrounded.