Current Transformers/Control Cables Selection - ABB PQFA Instruction Manual

If single core cables are used an alloy gland plate is recommended.
Cable terminals dimensions are shown hereafter.
Note for top cable entry PQFA: if you filter is fitted with an additional cubicle
for top cable entry, you only need one set of 3 power cables to be connected
to the busbar installed in the connection cubicle. Those cables shall be sized
as described at the beginning of this paragraph.
6.3.

Current transformers/control cables selection

Three CT' s are needed since the PQFA monitors the three phases of the
network.
The proper operation of the PQFA does not require any special CT' s. The
requirements are minimum:
In case the CT' s are shared with other loads, the VA burden shall be adapted
and the connection of the different loads (including the PQFA) must be in
series.
Twin 2.5 mm² control cable is the most suitable for this application.
In order to determine the suitable CT' s for your application, please refer to the
following chart.
? ? 5A of secondary
? ? 15 VA minimum for up to 30 meters of 2.5 mm² cable
? ? Class 1 accuracy or better
? ? Ratio limit above maximum line current
Asea Brown Boveri Jumet S.A.
PQFA Instructions Manual
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