Installation and connection
11
3-phase measuring
All 3 phase conductors (
L1 - L3
) are connected to voltage terminals
L1-L3
and the neutral conductor
to the
N
terminal. The 3 external hinged current transformers are connected to terminals
I1 – I3
in
the correct sequence and folded over the wires to be measured.
For
single
measurements, it is possible to set the
"Phase simulation"
parameter in the
General set-
tings
to "
Yes
". In this case, the values (voltage / cos phi / output) for
L2
and
L3
are simulated inter-
nally using
L1
.
This results in
less precise
measuring.
1-phase measuring
Only the phase conductor (to voltage terminal L1) and the neutral conductor N are connected. An ex-
ternal hinged current transformer is connected to terminal
I1
and folded over the wire to be meas-
ured.
The
"Phase simulation"
parameter is irrelevant for this.
External hinged current transformers
Ensure that the current transformers are assigned correctly (
I1
to
L1
,
I2
to
L2
and
I3
to
L3
) and that the energy direction is observed.
PLEASE NOTE:
Before snapping the current transformer onto the
phase conductors, they must already be connected to the CAN-EZ3A.
Otherwise the current transformers can be damaged.
Each external current transformer is labelled with "
K
L
", whereby
the
energy direction must be from K to L
for positive metering.
Each current transformer must be closed carefully by clicking the snap fastener securely into place.
If the energy direction is changed, the energy meter counts in the negative.
