85
16.
16.
16.
16. Maintenance
Maintenance
Maintenance
Maintenance and
and
and
and Trouble
Trouble
Trouble
Trouble Shooting
Shooting
Shooting
Shooting
Possible
Possible
Possible
Possible problem
problem
problem
problem
Possible
Possible
Possible
Possible cause
cause
cause
cause
Possible
Possible
Possible
Possible solution
solution
solution
solution
The meter has no
indication after the
control power supply
is imposed.
The power supply
fails to be imposed
on the meter.
Check if the correct working voltage has
been imposed on the L/+ and N/-
terminals of the meter.
Check if the fuse for the control power
supply has been burnt down.
The measured value
is not correct or does
not conform to the
expectation.
The voltage
measurement is not
correct.
Check if the neutral point has been
connected reliably.
Check if the measured voltage matches
the rated parameter of the meter.
Check if PT ratio has been set correctly.
The current
measurement is not
correct.
Check if the measured current matches
the rated parameter of the meter.
Check if CT ratio has been set correctly.
HRW Limited
Ph +852 2546 7402 - Fax +852 2546 7403 - [email protected] - www.hrw.hk