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7.1.5
No-Load Test
7.1.6
Starting Test
7.2
Cleaning
© Landis+Gyr
A test voltage U
of 1.15 U
p
according to IEC 62053-21 (e.g. U
Procedure:
1.
Disconnect the meter from the mains for at least 10 seconds.
2.
Switch on the test voltage U
active (circle) and the reactive (diamond) no-load indication must now
be permanently on. The energy direction indicators are off.
Procedure:
1.
Apply a load current of 0.1% of the base current I
of the reference current I
voltage U
(three-phase in each case). The meter must remain in no-
n
load.
2.
Increase the load current to 0.5% I
with I
= I
= 10 A). The energy direction arrow must appear within 10
b
ref
seconds and both no-load indications must disappear. The optical test
output for active energy must start to flash.
+P
Danger of short-circuits
Never clean soiled meters under running water or with high pressure
devices. Water penetration can cause short-circuits. To remove normal dirt
like dust a damp cloth is sufficient. If the meter is heavily soiled, it should be
dismantled, if necessary, and sent to an authorised service centre, so that a
new plastic viewing window can be fitted.
is used for the no-load test (creep test)
n
= 265 V with U
p
and wait approx. 10 seconds. Both the
p
L
L
L
k
h
1
2
3
, e.g. 10 mA with I
ref
L
L
L
k
h
1
2
3
(for MID: to 0.5% I
b
L
k
h
L
L
1
2
3
D000027979 en t – E350 Series 2, 3-Phase ZxF100Ax/Cx – User Manual
Maintenance
= 230 V).
n
or, for MID meters,
b
=I
=10 A, and the
b
ref
) (i.e. 50 mA
ref
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