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Make external connections as shown in figure 3-10. Check<br />
after wiring to make sure all connections are correct. (Do<br />
not use the control circuit buzzer to check connections)<br />
(A) Main circuit must be separated from other high voltage<br />
or high current power line to avoid noise interference. Refer<br />
to following figures:<br />
• A noise filter in the output of the main circuit can suppress<br />
conductive noise. To prevent radiative noise, the<br />
wires should be put in a ferromagnetic metal pipe and<br />
separated from all other signal lines by at least 1ft.<br />
MCCB Metal box<br />
Metal pipe<br />
Power supply<br />
Noise<br />
Noise<br />
~ filter Filter VSC23/48<br />
M<br />
filter Filter<br />
above<br />
Signal wire<br />
Controller<br />
Fig. 6<br />
Installation examples with adjacent signal conductors<br />
• The power supply and output PE terminals must be<br />
both connected to ground to increase noise immunity of<br />
the built-in Filter.<br />
Shielded wire<br />
Protective jacket<br />
L1 L3 PE<br />
To ground terminal<br />
(refer to instructions<br />
of filter wiring)<br />
Wrapped with insulation<br />
Do not connect this end<br />
Fig. 8<br />
Processing the ends of twisted pair cables<br />
Fig. 7<br />
M<br />
T1 T2 T3<br />
Grounding filtered units<br />
(A)The control circuit wiring and main circuit wire/ other<br />
high voltage/current power wiring should be separated to<br />
avoid noise interruption.<br />
• In order to prevent noise interference which could cause<br />
VSD faults, the control circuit signal should be shielded<br />
and twisted. Please refer to fig. 8. The wiring distance<br />
should be less than 150ft (50m).<br />
PE<br />
Ground<br />
(B) Connect ground terminals as follows: (200 V class<br />
ground
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