Nidec Leroy-Somer Powerdrive MD Smart, Integration Manual

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CONNECTIONS - CABLING
Powerdrive MD Smart Integration Guide
5751 en - 2021.10 / e
CONNECTIONS
CABLING
4.1.2.3 - Cable routing
Sensitive cables should preferably be routed through a metal chute, separate from the power cables or remote control.
This can be simply a U-shaped support of the chassis (connected in several points to the enclosure’s grounding).
Shielded or sensitive cables must avoid running along power cables or bars or disruptive cables. However, a sensitive or shielded
cable may cross a disruptive cable at a right-angle.
In the enclosure, it is possible to place a ground bar, connected to the EP point of the enclosure (without specific request of the
specification of the case), on which it will be easier to make mass braid connections.
In case of parallel routing of sensitive cables and power cables or bar, a distance of 20 cm shall be respected.
Non-exhaustive list of sensitive signals:
Class or Group Type of signal
1
Very sensitive
- Low-level circuit, analogue input or output
- Measurement circuit, variable speed drive cabling, driver control panel, quick
link between control card, on-the-fly recovery cable, bus measurement cable,
etc...
2
Sensitive
- Digital circuit, field bus cable, CAN OPEN, Profibus, etc.
- All-or-nothing output circuit, encoder signals
- Low level continuous power supplies
3
Disruptive
- Inductive load control circuit (coils)
- Main power supplies connected to power devices
- Relaying
4
Very disruptive
- Switched power circuit (frequency variable speed drives, switched-mode
power supply)
- Power circuit
The following rules must be observed:
- Ensure an equipotentiality of low and high frequency masses between equipment (in particular between variable speed drive
chassis and RFI filters and between all chassis connected by shielded cables)
- Separate disruptive components from sensitive components in enclosures.
- Separate energy cables from low-level cables.
- Treat connections, ground connections, ground continuity.
- Equip all inductive loads with a pest control product.