POWERCIAT LX ST/HE/XE EN-54
13.9 - Precautions for connecting the
compressor power supply bus bar
This note applies to units using power supply bus bars with
riveted contact block at the level of the connection cages in the
control box. During re-connection it is imperative to:
- Engage each bus bar in the cage up to the stop
- Ensure visually that the bus bars have good contact
at the connection areas: There must not be any free
movement between the bus bar and the connection area
created by the fixing rivet of the contact block.
Connection of the contactor or
current transformer
2
2
1 Power supply bus bar with riveted contact block
2 Contactor or current transformer connection zone
13.10 - Checking the power factor
correction capacitors
The verication consists in measuring input current of each
capacitor bank. Check shall be done using a true RMS meter
reading:
Check that the input current absorbed by the capacitor is between
0.8 and 1.3 × Ir. A higher value may indicate heavy presence of
harmonics.
Absence of current despite capacitor is energized is an indication
that there is a defect. Conrmation shall be done by removing
the capacitors and checking the underside.
Incorrect
Correct
13 - STANDARD MAINTENANCE
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