Installation
Page 18 Single Phase MultiCube
3.2 CT Connections
The MultiCube is designed for use with an external current transformer (CT).
Recommended types should conform to Class 1 per IEC 60044-1. The secondary of
the CT should be specified to suit the input rating defined on the meter label. Cables
used for the current circuit should have a maximum conductor size of 4.0mm
2
and
should be kept as short as possible to reduce cable losses loading the CT secondary.
The CT Input to the meter is isolated from all other parts of the circuit.
WARNING :
NEVER
leave the secondary of a current transformer open circuit
while a primary current flows. In this condition dangerous voltages
may be produced at the secondary terminals.
3.3 Voltage Connections
Cables used for the voltage measurement circuit should be insulated to a minimum of
600V AC and have a minimum current rating of 250mA. The maximum conductor
size is 4.0mm
2
.
An external protection fuse is recommended for the voltage measurement input. This
should be rated at 160mA maximum, Type F, and should be able to withstand
voltages greater than the maximum input to the meter.
Summary of Contents for MultiCube Single Phase
Page 1: ...MultiCube Single Phase Multi Function Electricity Meter Installation and Operation ...
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