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Weller WRS1000 soldering station 240v to 120v

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neazoi

neazoi

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Hello I have a Weller WRS1000 soldering station purchased from US and requires 120v.
The back side at the fuse writes, 120v 1.6A and inside the station there are already transformers to transform 120v to 24v and 12v.
So I think that I need a 200W transformer to bring it down from 240v to 120v.
In my area there are autotransformers available but they do not have a gnd connection. They connect with 2 wires to the plug and they output two wires to the station. Since the station has a ground cable which is connected to it's chassis, can I use a non grounded autotransformer and connect the mains gnd directly to the station?
Would that be better if I also connect the mains gnd to the transformer metal enclosure too?
 

The essential point is to connect the protective earth of the soldering station, whatever transformer you are using. Grounding the transformer case is a good idea as well.
 
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    neazoi

    neazoi

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If it was set for 120:24 then using 240 you want 120:12 perhaps, to get same 24 out, otherwise 48 pfft.

The manual should be clear.

normally tip is floating with respect to AC and with 1M resistance to ground lead to tip. So you could make it ESD type with external 1M if not connected on variac.
 

SunnySkyguy said:
If it was set for 120:24 then using 240 you want 120:12 perhaps, to get same 24 out, otherwise 48 pfft.

The manual should be clear.

normally tip is floating with respect to AC and with 1M resistance to ground lead to tip. So you could make it ESD type with external 1M if not connected on variac.
Click to expand...

Thank you all, I finally found that the transformer I have bought was an isolated type.
I am sorry about this. However the discussion was helpfull.
 

2:1 isolation is ok.

email cooper or Weller to ask if internal jumper allows 240 use.


Then check for 24V AC voltage on socket and for heater pins and <1 Ohm for 50? Or
75W heater?

I forgot thermistors dont run that high so it is likely thermocouple sensor low R.

if heater is burnt out u may be out of luck unless you can repair nichrome wire.
 

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