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Household Electricity

RBC Sitel protective buzzer

RicardoD7i
hace 5 años
hace 5 años
Install a sitel RBC protector (single phase) and a while ago when activated from the switch it brings makes a loud hum. Next to it has a 25 A schneider contactor who told me it was necessary for it to work well. Do you have any idea if it is a fault of the high and low protector or is it normal? This is the protector: And this is the contactor:
RicardoD7i
hace 5 años

Just take it apart and what is generating a lot of noise is the Schneider 25 Amper contactor, do you know if this noise is normal?

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carlos_caballito
hace 5 años
hace 5 años
Hi, I wouldn't have to buzz. Check that the terminals that feed the coil are tight, otherwise change the contactor since its internal coil must have a problem. Regards.
RicardoD7i
hace 5 años

Thank you very much for the reply. I tell you that I have a 25 amp contactor through which all the electricity in the house passes, that is to say that I have
first general thermal
segund circuit breaker
3rd RBC sitel high and low protector
fourth 25 amper schneider contactor
From there I go to the thermals of each circuit.
Do you decide that with those 25 amper the contactor is enough to power the entire house?

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carlos_caballito
hace 5 años

Check the total consumption of the property, since the contactor must support the load of the circuits that start from it. The approach to distribution, General Thermal, Circuit Breaker, Protector that feeds the contactor coil, and the contactor feeds the terminal circuits is fine.

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RicardoD7i
hace 5 años

Very good clarification Carlos! How can I calculate the total consumption of the house?
From the contactor I have 5 circuits that come out: two of 16amper (plugs throughout the house, divided into 2), one of 10 amper for the lights, one of 20 amper for the air conditioning and another of 25 amper that goes to another box with thermal for the laundry

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elektomaq
elektomaq
62.202
hace 5 años

How many amper is the general thermal?

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RicardoD7i
hace 5 años

The general thermal and circuit breaker, both are 40 amper

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elektomaq
elektomaq
62.202
hace 5 años

40A is not very common in single-phase installations. The driver who arrives to the board and joins all its components must be a minimum of 10 mm², if it is smaller, it should be corrected (comments)

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RicardoD7i
hace 5 años

Yes ... I know, it has a 10mm cable from the meter to the main key, it is quite high compared to the standard 32 amper, but I don't think it's a problem (correct me if I'm wrong, I'm not a professional on the subject )

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elektomaq
elektomaq
62.202
hace 5 años

If all the connections are made with 10 mm², it would be fine, but the protector requires protection, just as the general thermal is armed, it should not exceed 25A but it is sure that it is insufficient so that a special connection must be made incorporating another thermal

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RicardoD7i
hace 5 años

The last thing is not clear to me. Do you decide to remove the contactor and replace it with a 25 amper termination before the protector? I read that a contactor was needed for the RBC sitel protectors

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elektomaq
elektomaq
62.202
hace 5 años

No ... the contactor is something else and if the simultaneous load exceeds 25A, if or if you have to put it
What I said is that the protector comes for 25A and a 25A contactor makes no sense. The contactor is used when the maximum capacity of the protector is exceeded. In your case you should use it but it should be 40 or more

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elektomaq
elektomaq
62.202
hace 5 años

The thermal is separate from the contactor and has to do with assigning a suitable protection to the device (voltage protector) since it is protected by a general thermal of much more amperage than what the protector supports by design

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elektomaq
elektomaq
62.202
hace 5 años

Look at the scheme in my main answer

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RicardoD7i
hace 5 años

very good scheme! I already have a 10amper end for the light circuit, under the contactor. Could you use that to protect the RBC sitel protector? What risk is there that does not have thermal protection?

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elektomaq
elektomaq
62.202
hace 5 años

No. It would have to be a therma independent of other circuits
The risk is internal damage to the protector or the board that can range from the uselessness of the device to fire

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RicardoD7i
hace 5 años

Great! it occurred to me that perhaps it would be good to put a high and low protector with more amperage, such as a Gralt brand, which has a maximum current of 63 amper (https://articulo.mercadolibre.com.ar/MLA-701055323-protector- de-voltage-high-and-low-63a-voltimetro-monophasic-_JM # D [S: ADV, L: VIPCORE_RECOMMENDED, V: 4, I: 1kaXNwYXRjaGVyLTIxOHwtNDIxNjc1ODkwMDc1NzA4MTAzMw == high =), C = 0.00 a00 high =) low that exceeds 40 amper of the general thermal, so you would not need the dedicated thermal protector, right?

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elektomaq
elektomaq
62.202
hace 5 años

There would be no problems. What if ... I don't know the quality of this protector

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RicardoD7i
hace 5 años

Thank you so much everyone! They really are geniuses! I admire the exchange we always have, which leads to the best solutions

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elektomaq
elektomaq
62.202
hace 5 años

For nothing .. it was a pleasure to have collaborated, anything do not hesitate to consult
Greetings and luck

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elektomaq
elektomaq
62.202
hace 5 años
hace 5 años
Hello RBC Sitel protectors are 25A. The 25A contactor does not make much sense but the biggest problem is that it does not have adequate protection I recommend a 40A contactor but there are several points to correct as to how everything is installed for what certain information is required the buzz is usually generated by inadequate coil tension, internal society (cleaning) or false contacts comment for more details Here I leave you an outline. Sorry, I dodged it, I did it freehand ... the protector in the scheme is protected by a small thermal of 10A (it can also be 6A). It only takes a sample of the voltage and its only load is the contactor coil. Open and / or close the contactor by enabling or disabling the power supply of the whole house or of the important circuits to be protected. any questions here we are regards
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