Interested to Buy Any Domain ? << Click Here >> for more details...
I am an electrical power engineer and arranged power system
for a data center, I installed MCB, ELCB and erthing system
TN-C-S.
But some times several ELCBs Disconnect circuits at the
same time! what may be the reason? (the ELCBs are 25A ,30mA)
- 9 Answers
- 12876 Views
- I also Faced
- E-Mail Answers
Answer Posted / 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.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Describe Non I.S. Earth System and why is it used?
If two Transformers are connected in parallel having impedance of 50KA in both transformers will the impedance increase or decrease after connecting transformers in parallel?
what is the differebt between ac and dc fuse?
TRANSFORMERS WITH DC SUPPLY
advantage of motor design on higher power factor . normally motors are designed for .8 power factor. what is advantage of designing at .88 power factor
A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?
What are steps to be taken while designing of DYN11 distribution transformer to achieve magnetising balance?
how can we change the phase angle b/w two phase?
List out the different frequency domain specifications?
briefly explain the main blocks found in a microprocessor based system
what is difference between speed mode and torque mode in motor?? explain in simple words please.
The 3 phase 400 hp 440 volt slip ring induction motor do not take one phase amps why ? The motor is running good condition
what is the condition for YnD11
What is the end effect of linear induction motor ??
what parameters are should nessary for control technic dc drive(in rolling mills)?
