Manual Power Quality Filter PQFM
Electrical design and installation 43
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 an IP00 filter
system
In order to successfully connect the PQF-Manager to an IP00 filter system, two
connections have to be made.
−
The 230 V power supply connection
−
The internal CAN bus connection
These two connections are already made on the PQF-Manager side. Once the
PQF-Manager is fixed into the cubicle (Cf.
Section 5.5
), roll out the cable connected to it
and route it to the main controller board.
Further adhere to the guidelines given below:
The 230 V and internal CAN bus connection are integrated in one connector. This
connector has to be plugged into the P4 socket of the main controller board.
After having plugged in the connector, fix the cable properly along the filter frame.
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.
Every filter has been tested for insulation between the main circuit and the
chassis/frame at the factory. Therefore, do not make any voltage tolerance or insulation
resistance tests (e.g. hi-pot or megger) on the inverter units. Check the insulation of the
assembly by measuring the insulation resistance of the filter between the Protective
Earth (PE) and all 3 phases shorted together, with MCB shorted, and auxiliary circuit open
(auxiliary fuses removed). Remove P2 and P3 plugs from the control board.
WARNING: Making the test with the auxiliary circuit closed may damage the filter.
Use a measuring voltage of 500 Vdc. The insulation resistance must be higher than
500 k
Ω
per enclosure.
6.4 EMC considerations
The CE version of active filter complies in its standard version with the following EMC
guidelines:
−
EN/IEC 61000-6-2: Immunity standard for industrial environments, Industrial
level.
−
EN/IEC 61000-6-4: Emission standard for industrial environments, Class A.