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Ovens and Cooking

Electric oven is derived to ground

rober
rober
100
hace 5 años
hace 5 años
Hi everyone. I am repairing a longvie e1900 electric oven which is derived to mass. The client brought it to me because the differential circuit breaker jumped, annulled the earth and gave it current. Checking it in the workshop is like that, without land it is derived to the carcass. Test the resistors and they are not cut nor are they derived to mass. I disconnected them and the problem continued. Check wires, fan, lamp and thermostat. The fault occurs when I move the thermostat and select the temperature. by disconnecting the terminals of this it is no longer derived. The specific question is how do I test the thermostat and know if it is grounding or not? Thanks to anyone who can help me
Carlos Qu
Carlos Qu
304
hace 5 años

If it is the thermostat and you do not want to change it, you will have to disassemble it to see which internal part is touching the housing when you operate it.

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rober
rober
100
hace 5 años

First of all, thank you for your time. It's not that I don't want to change it, I would like to change everything, before I go crazy to get the replacement

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Carlos Qu
Carlos Qu
304
hace 5 años

Do you have a tester to measure it?

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rober
rober
100
hace 5 años

Yeah right. in fact I measure continuity and it varies as I select different temperatures. I assume that if I measure a terminal with the thermostat housing it should not have continuity but it is only a deduction

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flacovargas2006
hace 5 años

Hello you can place the tester in coninuedad or beep one tip in some metallic part of the thermostat and the other tip in some place of the oven where it has no paint and should not mark or whistle if mark is the thermostat that turns to change greetings.

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Carlos Qu
Carlos Qu
304
hace 5 años

It is a successful deduction, there does not have to be even resistance since that part is screwed to the carcass.

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rober
rober
100
hace 5 años

Test as described above and the thermostat has no continuity with the oven housing. Check everything again and I can't find the reason for the referral

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flacovargas2006
hace 5 años

Hello check the wires that enter and leave the thermostat one must be making dough may be peeled, reheated, a terminal making mass etc. greetings.

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rober
rober
100
hace 5 años

I have checked wires one by one, terminals, thermostat, lamp, continuity of resistances and shunts to the housing and nothing. I don't know what to look for anymore

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flacovargas2006
hace 5 años

Hello, take out the thermostat from the kitchen, leave it with the connections but do not touch anything metallic and try to regulate the temperature to see if the circuit breaker goes on something plastic so that it does not have contact with the housing greetings.

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rober
rober
100
hace 5 años

I already did the test to take out the thermostat and not touch any metal part even remove the inner bulb and also isolate it. The failure continues.
Here I pass the resistance measurements to see if the subject comes around.
1- resistance of 800w measurement 54.5 Amp
2- resistance of 1200w measurement 56.2 Amp
3- resistance of 1100w measurement 41.3 Amp
4- resistance of 1000w measurement 47.2 Amp

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rober
rober
100
hace 5 años

sorry resistance 1 of 800w the measurement is 38.4amp

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flacovargas2006
hace 5 años

Hello, with the tester, place a tip on one of the legs of the male token and with the other touch the housing where it has no paint and then you change the leg of the male token, did you already do it? Greetings .

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rober
rober
100
hace 5 años

if you refer to the legs of the resistors I have already done it and there is no continuity between leg and housing

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flacovargas2006
hace 5 años

Do not insert the cable you put into the wall outlet.

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rober
rober
100
hace 5 años

I put a direct ground discharge and measured the leak. While the oven is cold mark 5A and while it is heating it increases to a maximum of 18A. I put a circuit breaker exclusively for this device and it does not jump but by putting it in a line with other electrical devices if it does.

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Angel Huapalla
hace 5 años
hace 5 años
With tester you will not be able to deduce the fault, use a megometer to determine the fault, put it in the 500 volt range
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