Parker AC30V Series, Manual

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C-11
Compliance
AC30V series Variable Speed Drive
•
Use 360° screen terminations.
Figure C-1 360 Degree Screened Connection (Motor)
Some hazardous area installations may preclude direct earthing at both ends of the screen, in this case earth one end via a 1
µ
F 50Vac capacitor,
and the other as normal.
•
Keep unshielded cable as short as possible inside the cubicle.
•
Always maintain the integrity of the shield. If the cable is interrupted to insert contactors etc., re-connect the screen using the
shortest possible route. Some motor gland boxes and conduit glands are made of plastic, if this is the case, then braid must be
connected between the screen and the chassis. In addition at the motor end, ensure that the screen is electrically connected to
the motor frame since some terminal boxes are insulated from the frame by gasket/paint.
•
Keep the length of screen stripped-back as short as possible when making screen connections.