Instructions For Connecting The Pqf-Manager To A Filter System; Checking The Insulation Of The Assembly - Earth Resistance - ABB PQFS Installation, Operation And Maintenance Instructions

disconnecting the mains power in order to discharge the capacitors. Always verify by
measurement that the capacitors have discharged. DC capacitors may be charged to
more than 800 Vdc.
The DC capacitors of PQFS units are automatically charged once the auxiliary circuit is
energized, regardless of whether the filter is switched off or not. Do not touch the DC
capacitor link when the auxiliary fuse box is closed.
The active filter control board carries dangerous voltages and shall not be touched once
the the auxiliary circuit is energized, regardless of whether the filter is switched off or
on. Once the auxiliary circuit is opened, high voltage levels can still be present on the
control board. Respect a delay of 25 minutes after disconnecting the mains power
before touching the control board.

6.2 Instructions for connecting the PQF-Manager to a filter system

PQFS filter master units are by default equipped with the PQF-Manager user interface.
In some cases however it may be needed to remove and reconnect the PQF-Manager to
the filter.
In order to successfully connect the PQF-Manager to a PQFS filter unit, it suffices to plug
the male connector attached to the PQF-Manager into the corresponding female
connector attached to the filter hardware. This is illustrated in
Figure 24: Connection of the PQF-Manager user interface to the PQFS filter hardware
The female connector associated with the filter hardware is situated at the top right side
of the control board and becomes visible after removing/lifting slightly the filter
protective cover.
Note that the connector incorporates the following signals:
−
The 230 V power supply connection
−
The internal CAN bus connection
6.3

Checking the insulation of the assembly - earth resistance

WARNING: Follow the procedure outlined below to check the insulation of the filter
assembly. Applying other methods may damage the filter.
Manual Power Quality Filter PQFS  Electrical design and installation 37
Figure 24.