Anyone heard of self reset-ing ELCB ?

Am curious on how this resetting ELCB works. The ELCB is supposed to trip when there is a fault in the circuit. Auto resetting without establishing the fault first, would that be dangerous?

can be bought but they only reset three times before a manual reset is required. they are meant for unammned outstation places. if you want self resetting safe the money and just remove the existing one. safety wise its (almost) the same

Maybe u try playing around with the little MCB switches and try to narrow down which circuit is causing the trip during lightning?

is there a device that we can use to check and find out the problems ???

Yes, someone already mention it before.

Better check on your house earthing ... if trip during lightning ... Or you can try changing your RCCB to those like Hager RCCBs that is designed with an anti-nuisance tripping feature, which do not unnecessarily tripped unless there is a genuine earth fault.

This post has been edited by Zestune: Nov 11 2011, 01:36 AM

There is also electronic selectable sensitivity to adjuct from 0.1A to 1A cut off.

Anyway having it trip during lightning isn't good as it try block surge from entering your electrical appliances.

Btw MCB is meant for overload cut off. It trips whenever the load (amperage) goes beyond the rated. Usually it trips when Live wire shorted to Neutral. ELCB trips whenever there is leakage on Neutral. For example, Live or Neutral wire is leak to the earth, it trips.

To test how good is your electrical grounding, get a MEGA tester or insulation tester. Calculation based on OHM.

OHM = ??

nvm found out its also ohm / resistance calculation

This post has been edited by JinXXX: Nov 11 2011, 03:06 PM

MCB detects overcurrent. Say, a 2.5HP aircon connected to 10A MCB, MCB will trip.
ELCB detects if any current running in the Earth conductor
RCCB detects residue current between L&N.

Earth Resistivity (Electrical Grounding) test using Earth Tester. Calculated in Ohm, the lower the ohm the better it is.

Insulation Tester (Mega Tester) is test the insulation capability of the cables. Measured in MOhm. The higher it is, the better.

Both Earth tester and insulation tester are not cheap at hundreds.

+1

Hi,
As mention the ELCB for 100mA will trip frequently during storms is a norm. Its prove that your ELCB working. If the ELCB never trip at all, you are in trouble. ELCB is a safety device used in electrical installations with high earth impedance to prevent SHOCK and to protect your SENSITIVE equipment/home appliances.

The ELCB rating should be as low as possible to prevent shock; do you think that 100mA is safe enough for human and equipment? NO. IEC 60479 stated that human cannot take in more than 7mA of leakage current. More than that are critical level and may cause to DEATH. Unfortunately, the current ELCB lowest rating is 10mA whereby still a risk to human against SHOCK. If you choose to use 30mA at your main, you will complain that it trip more frequent as compare to your assisting one (100mA).

I have the solution where comply to IEC 60479 and eliminate nuisance trip…

100ma is complusary for main switchboard.cant use more than that according to regulation.nuisance tripping occured during lightning strike due to current imbalance between live and neutral.so its pretty normal.lightning wave travel frm tnb cables to ur house.its not about the lightning is far...

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Added on October 27, 2012, 5:17 pmiec stated min is 30ma to prevent frm direct contact.not 7ma.100ma is for domestic application as per regulation.30ma is for final circuit or special location

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Added on October 27, 2012, 5:23 pmelcb and rccb serve same purpose..elcb is old term and has been raplaced with rccb


This post has been edited by jack~daniel: Oct 27 2012, 05:23 PM

My house also get nuisance trip during thunder storm, I plan to change the TBC 100mA RCCB to Hager 100mA RCCB, would it help? and where to get the Hager RCCB?

if your earth is good it *might* help. do note that in my personal opinion you dont need an ELCB at all if you decide to go higher than 30mA. Its no use. The ELCB is meant to save a humans life if they get into the circuit. If your cutoff level is already deadly why even bother with it? Either you do it properly or no need to do at all. If nobody gets inside the circuit you're pretty safe without an ELCB.

If using 30mA then I expect the nuisance trip will even worst!

Actually the 100mA is good enough, it trip yesterday when the aircon installer accidentally touch the wire.

I think most house in Malaysia use 100mA by default.

Not true. I been using 30mA for many many yrs. Last time I always have this nuisance tripping. Go to electrical shop and ask for the solution from the bos. Told me to change to a better 1 and abit expensive. Brand hager and cost rm120. Change it and now less trip.

Use a better way to solve the problem and not downgrade the safety. You still have a solution like earthing and surge protector.

Thanks for the advice, I will give it a try, Where can I get Hager brand in Klang Valley area? Can I get it at Jalan Pasar?

Find the root cause of the problem. Keep increasing the tolerance must as well bypass ELCB run without safety.

The original RCCB from the house developer is 100mA. Trip like hell. Change it to better brand Hager 30mA. Less trip.

So it doesn't logic to me that 100mA give less problem. And compromise the safety.

You can get it at any electrical shop. It is not branded item now.