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LV Active Filters PQF
Commissioning report
8.11.2 Inspection on site – verification of the active filter after installation
Ambient conditions
Check the ambient temperature (< 40°C/104°F) (if > 40°C/104°F, derating is required)
Check the installation altitude (< 1000m/3300ft) (if > 1000m/3300ft, derating is required)
Check the ventilation (room and enclosure)
Ensure that no sources of conductive dust are present
Upstream cabling and protection
Upstream protection installed
Check cross-section of power supply cables (L1-L2-L3) and neutral (if connected)
Check cross-section of protective conductors (PE) ( 16 mm²) connected to each enclosure.
Earth interconnection between the different units installed
Check the setting and operation of the protective apparatus
PQFS neutral current can be up to 3 times the PQFS phase current!
Check rated current of the power supply cable fuses (if applicable)
Check tightness of conductor fixations
The material of busbars, terminals and conductors must be compatible (corrosion)
(a)
Internal connections
Disconnect the filter from the supply (disconnection recommended by upstream protection)
If filter connected to the supply before, wait for 25 minutes to discharge DC capacitors
Remove the right side of the protective cover of the filter. Ensure that the left side of the
protective cover is in place. Disconnect PQF-Manager if required.
Open auxiliary circuit fuse protection box
DC capacitor voltage low enough to operate safely (DC voltage measurement)
Change auxiliary transformer primary tap setting to correspond to network nominal voltage
(b)
rating
Wiring of main and auxiliary circuit
Tightness of all electrical connections
Connectors properly plugged in
Fixation of components
Remove anti-corrosion capsules installed at the inside bottom of the filter (if still present)
Clearances
Address of each filter unit in a multi-unit system set to a different value and 'main' master has
(c)
the lowest address
CAN bus terminated properly on each unit of a multi-unit system
CAN bus communication cable between the different units properly installed
(a)
Installation
Check the cabling of the digital I/O (if present)
Check the voltage in accordance with the specification
Check the phase rotation order (with filter auxiliaries off) (clockwise)
For multi-unit filters, check that the same phases are connected to the same filter power
terminals for the individual units
Check visually the current transformers
-
Ratio
-
Installed at the right side (feeding-side of the active filter)
Project:
Issued by:
Date:
Manual Power Quality Filter PQFS Commissioning instructions 161
(c)
(c)
(b)
Page 2 of 7
OK/NOK
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Troubleshooting
