Parker AC890PX Series, Руководство по эксплуатации продукта

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C-15
Certification
AC890PX AC Drive

Keep electrically noisy and sensitive parallel cable runs to a minimum. Separate parallel cable runs by at least 0.25
metres. For runs longer than 10 metres, separation should be increased proportionally. For example if the parallel runs
were 50m, then the separation would be (50/10) x 0.25m = 1.25m.

Sensitive cables should cross noisy cables at 90

.

Never run sensitive cables close or parallel to the motor, dc link and braking chopper circuit for any distance.

Never run supply, dc link or motor cables in the same bundle as the signal/control and feedback cables, even if they
are screened.

Ensure EMC filter input and output cables are separately routed and do not couple across the filter.
Increasing Motor Cable Length
Because cable capacitance and hence conducted emissions increase with motor cable length, conformance to EMC limits is
only guaranteed with the specified ac supply filter option up to a maximum cable length as specified in Appendix E:
“Technical Specifications".
This maximum cable length can be improved using the specified external input or output filters.
Screened/armoured cable has significant capacitance between the conductors and screen, which increases linearly with cable
length (typically 200pF/m but varies with cable type and current rating).
Long cable lengths may have the following undesirable effects:

Tripping on `overcurrent’ as the cable capacitance is charged and discharged at the switching frequency.

Producing increased conducted emissions that degrade the performance of the EMC filter due to saturation.

Causing RCDs (Residual Current Devices) to trip due to increased high frequency earth current.

Producing increased heating inside the EMC ac supply filter from the increased conducted emissions.
These effects can be overcome by adding chokes or output filters at the output of the VSD.