Answer / chandra

Mr. Mehdi, Do check the neutral of all circuits wether they
are connected to same ELCB group. If one neutral from one
group is connected to other group this problem will occur.
Even though all neutral is common at final point, each
neutral will have to pass through the ELCB in order to
monitor the return cuurent.

Answer / prashant

that means tgat u wer using those 30 mA ELCB to feed ur ac/
power sockets or some other heavier load

Answer / k.p.sharma

Mr.chandra & mehndi is right and the normally mA of ELCB
used IS AS BELOW:-

1. FOR DOMESTIC = 30MA
2. FOR COMMERCIAL BUILDINGS ETC = 100MA
3. FOR INDUSTRIES = 300MA

Answer / nageshwaran.n

Hi boss, check the connections properly.
Check for:
1. Total Load on MCB's. It should not exceed the market
rating.
2. For ELCB's, check the circuit for the leads interchange.

Answer / mehdi

there wasn't any Falctuation in cicuits. it is strange that
if any problem occured in one circuit others may not be
failed!
I solved my problem by replacing those ELCB with 300 mA
Type!

Answer / x man

TRY 100ma

Answer / pillay

the choice of 30 ma is correct,
or in fact we should be able to
decide what ma rating we want
to choose where.
It could be the fault current was
quite big but fault current could
not be grounded fast enough resulting
in the current floating into other
neighbouring cct resulting in triggering
of the elcb,s.The other solution would
be checking the grounding connections from
the earth pit to upwards and also the actual
earth resistance measurements.

Answer / prakash veer singh

Dear Mahdi
Some Current is leakege in earth form circuit and
equepment . so your ELCB was trip.so frist check the all
circuit .
you are using TN-C-S earthing .in this common earth use
for nutral and grounding .
I suggested you for use TN-S type earthing .

Answer / shriram.....

ELCBs Disconnect circuits at the power fluctuation time or
any other reason????

What is the difference between Zero Current Transformer and Core Balance CT ?

1 Answers  

If the positive terminal of batteries in 125 v dc system is connected to earth what will happen ?

4 Answers  

why we do occ & scc test in transformer ?how we can do it ?

2 Answers  

What is earth?

0 Answers   CLG,

What is the role of Dedicated earthing in UPS System?

0 Answers   HCL, MSPL,

Mr. mohh sahid m not satisfied for ur answer to the que weather the size of transformer increases or decreases withchange in fr for more detail go to the answer given by me

0 Answers   Sail,

sir please send me previous year questions of jspl through which i could prepare myself fpr the test.

64 Answers   FGH, HFT, Jindal, Jindal Steel and Power, JSP, JSW, Lin Engineering,

sometime battery charged and then automatically charged when rectifier ON conition, is there any chances please clarify the same.

0 Answers  

I have 500A load (WHICH IS SEPARATE MDP PANEL),an MCC panel with 4000A Breaker.Already I have 2500A load.Can I connect this load directly to the Busbar since I have PROTECTION IN MY MDP Panel ?

4 Answers  

why the efficiency of generator is more than the motor in case of swinburne's test????

1 Answers  

What are the advantages and disadvantages of the ac motors?

0 Answers  

Motor also having losses, we call KW rating. In transformer and generator having losses but we call KVA Rating why?

9 Answers