32KW XRAY GENERATOR

[Therealcrt]

Can anyone tell me what the amperage of this xray generator is, the client gave me this info,picture below.

 

[Shaneyj]

Is this a trick question?
It lists all the momentary current draws at the different voltages.
Steady state is less than 5 amps.


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[roger]

Tell the client to give you all the information. This is like asking what size tire should I use with no more information.

 

[Therealcrt]

Is this a trick question?
It lists all the momentary current draws at the different voltages.
Steady state is less than 5 amps.


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It’s not a trick.. if the nominal current is only 5 amps what does the momentary Amps

 

[Therealcrt]

Tell the client to give you all the information. This is like asking what size tire should I use.

This is all the information

 

[roger]

This is all the information

Well it's not enough.

 

[Therealcrt]

Well it's not enough.

Then why is Shaneyj so confident..? which one of you are right

 

[Therealcrt]

I’m not gonna run 200amps if it only draws 5 amps so what the momentary current mean

 

[Shaneyj]

It’s not a trick.. if the nominal current is only 5 amps what does the momentary Amps

The momentary is just what it sounds like. And I would guess they give you that info because you need to size your circuit accordingly to avoid nuisance tripping. You need an installation and operations manual.
And you also need to know what the service type is, I.e. single or 3 phase, 208, 230, etc.


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[Therealcrt]

The momentary is just what it sounds like. And I would guess they give you that info because you need to size your circuit accordingly to avoid nuisance tripping. You need an installation and operations manual.
And you also need to know what the service type is, I.e. single or 3 phase, 208, 230, etc.


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I’m tapping off a panel that’s near by but I was planning on the single phase 208 but I can’t install a 200amp breaker in a 100amp panel that’s dumb also that size wire for only a 5amp current draw? This is what confused me about all of it

 

[Shaneyj]

Then why is Shaneyj so confident..? which one of you are right

Roger is right. You need more information before you can design a circuit/infrastructure.
Get real information from the manufacturer if you want to confirm you won’t have to do it more than once.


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[roger]

I’m not gonna run 200amps if it only draws 5 amps so what the momentary current mean

Neither would I and after years of doing medical installations I would not design a circuit without the manufactures information.

 

[winnie]

You need to know the duration/duty cycle of the system.

Xray equipment operates at very high power for short periods of time, typically a fraction of a second per 'shot'. The peak vs average power is so vastly different that code has an entire article devoted just to Xray equipment. The unit you are looking at will really draw 220A at 208V, but for perhaps 0.1 second.

For sizing conductors, code let's you consider the short duration of operation, but you also need to ensure low enough impedance during the high current operation.

Without the operation duration and duty cycle, I don't think you have enough information to size the circuit. I doubt you want to supply this unit from a 100A panel, unless you don't care about the effects on other loads in the panel.