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Dummy load for up to 130KV power supply.

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i200yrs

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Hello all...i have a project to build or purchase a dummy load up to 130KV Vdc power supply....Any inputs are much appreciated....thanks
 

Hi,

What are the possible answers we can give? ... while we don't know details.

* Buy one resistor rated for 130kV
* Or buy several high voltage resistors in connect them in series.

We don't know about wiring, Amperes / power....size, cost....
We don't know why you ask...

Klaus
 

I am working in a company doing inhouse repair. One of the psu we received rated 130KV. We have done the repair (without lab test) and installed back in the machine. Now the machine works with this repaired psu. BUT my boss ask me a project or buy a dummy load for future repair.
 

A dummy load is a lab alternative to the real load seen in the field. It is to allow you to replicate (or nearly replicate) actual conditions when the unit is in normal use.
What you haven't told us is what the expected load would be. The type of dummy load would be highly dependent on the current drawn and how long it is drawn for, that's why we can't be more specific.

You question is like "What kind of vehicle should I get?" without specifying whether it should be a bicycle, supertanker or jet airplane.

Brian.
 

up to 130 kV DC

at what maximum current, or what maximum power?
how long do you want to run the test (minutes? hours? days? weeks?)
do you want/need to test with the output open? shorted?
how much monitoring do you want?need?
how much adjustability do you want/need?

it will be expensive, whether you buy it or build it
 

130 kV is X-Ray tube territory.

If this is indeed the case......

I agree that a dummy load should be used instead of a tube for troubleshooting. Operating an X-Ray tube outside its maximum limits is very dangerous.
 

Hello All...yesterday i been inside the fab to check the load structure....So the load of this psu in the machine as per equipment engr told me is "focus assembly" for the moment i dont know this thing. The machine they called implanter (semiconductor wafer fab machine). The power supply rated capacity is 130Vdc 5mA.
 

i200yrs said:
So the load of this psu in the machine as per equipment engr told me is "focus assembly" for the moment i dont know this thing. The machine they called implanter (semiconductor wafer fab machine). The power supply rated capacity is 130Vdc 5mA.
Click to expand...

Ok, the load is purely resistive. 130kV x5ma =650W is the load power and the load resistance is around 130kV/5mA =260 M. Give some margin and reduce the load resistance to about 250M.

Because of the high voltage, you need to setup the resistor assembly in a glass tube. Because of the high current (and power), you may have to use several units in parallel: say 5 units of 1250M in parallel, Or, if you want them in series, 5 units of 50M resistors in series.

Each unit should be enclosed in a glass tube and the tube filled with a insulating oil. Ensure each connection to be corona (not the virus type) resistant.

I guess one end of the PSU output is grounded. So you can safely connect one of the load ends to ground.

Take lots of safety precautions. Always stand off ground.
 

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    i200yrs

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i200yrs said:
Hello All...yesterday i been inside the fab to check the load structure....So the load of this psu in the machine as per equipment engr told me is "focus assembly" for the moment i dont know this thing. The machine they called implanter (semiconductor wafer fab machine). The power supply rated capacity is 130Vdc 5mA.
Click to expand...
If it's 130vdc at 5mA, you need a 26K ohm load that is for a watt. your load will be dumping 650mW. If you are series connecting the resistors with equal values the wattage will be divided by the number of resistors. Just hit your electronics supply web page and look for the combination that will give you 26K and one watt. Pick up some proto boards to solder them or get some clip leads.

If you are loading a 130KV supply get back to me and I can get you some photos of some working loads that are in the ball park of what you would need. No oil or glass tubes, just a bunch of resistors and an acrylic plastic frame.

I work for a company that made wafer implanting machines back in the eighties and have worked on some of the hardware along with testing and repairing the high voltage supplies.
 

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    i200yrs

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CarbonSpark said:
If it's 130vdc at 5mA, you need a 26K ohm load that is for a watt. your load will be dumping 650mW. If you are series connecting the resistors with equal values the wattage will be divided by the number of resistors. Just hit your electronics supply web page and look for the combination that will give you 26K and one watt. Pick up some proto boards to solder them or get some clip leads.

If you are loading a 130KV supply get back to me and I can get you some photos of some working loads that are in the ball park of what you would need. No oil or glass tubes, just a bunch of resistors and an acrylic plastic frame.

I work for a company that made wafer implanting machines back in the eighties and have worked on some of the hardware along with testing and repairing the high voltage supplies.
Click to expand...
Thanks...can you show me the photos and wiring diagram? thanks
 

i suggest you look at Caddock high voltage resistors
such as the MX500 series
MX585 is rated at 32kV (maximum continuous voltage) and a maximum resistance of 1000 Mohm and 10W
i suggest you arrange a series and parallel configuration to meet the resistance, voltage and power requirements

i expect they have a few application engineers who can help with details
 
wwfeldman said:
i suggest you look at Caddock high voltage resistors
such as the MX500 series
MX585 is rated at 32kV (maximum continuous voltage) and a maximum resistance of 1000 Mohm and 10W
i suggest you arrange a series and parallel configuration to meet the resistance, voltage and power requirements

i expect they have a few application engineers who can help with details
Click to expand...
Hi...do you think there's a "ready to use" electronic load or resistive load or any load method that i can purchase? let say cost is not a problem....thanks
 

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