Still i feel there is some thing wrong with elcb(selection)
Was that suppose to make sense?
The problem is probably the air handler / blower motor, due to currents induced by the moving magnetic field, and capacitance between the windings and the frame or rotor. This is unavoidable.
Test : disconnect the motor so it cannot run, then turn on the heating equipment.
If the elcb does not trip, then you will have to connect the motor to its own circuit with its own elcb.
You don't describe how you measure "leakage" but a DC resistance test won't reveal AC currents caused by a running motor.
http://en.wikipedia.org/wiki/ELCB
You will probably have to get a master electrician or electrical engineer to solve this problem for you.
State the voltage and the phase number of your supply.
State the number of heaters and conductor size supplying them.
The circuit breaker is sized to protect the wiring.
The wiring is sized to supply the load.
Do not replace circuit breaker.
What is "leakage"?
What is the rate of breaker ?
How old was the breaker ?
Suggest to replace all the relative breakers with a new one and its rate should higher than 60KW.
You need a breaker that is a lot larger than 100 mA.
I changed new elcb (100mA)
Still i feel there is some thing wrong with elcb(selection)
