K&R GT600-4T132G, User Manual

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3. Electrical Installation
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Conductive surface
3.2.2 Main Circuit Cable Recommendations
■
Main Circuit Cable Selection
K&R recommends symmetrical shielded cable as main circuit cable, which can reduce
electromagnetic radiation of entire conductive system compared with four- conductor
cable
For more details, see descriptions in section .
■
Power Input
●
There are no phase sequence requirements for three-phase cable connections.
●
Specification and installation of all external power cables must comply with local
safety regulations and relevant IEC standards.
●
Install filter close to power input side of the AC drive with cable shorter than 30 cm.
Connect the ground terminal of filter and the ground terminal of the drive together to
the cabinet main grounding terminal.
■
DC Bus Terminals
WARNING
3
●
DC bus terminals, labeled (+) and (-), are terminals that carry a residual
voltage for a period after the drive has been switched off.
●
To avoid risk of equipment damage or fire, when you select an external
braking unit for use with an AC drive of 90 kW and above, DO NOT
reverse the poles (+) and (
–)
.
●
Use a cable not exceeding10 m to connect DC bus terminals to external
MDBUN braking unit. Use twisted pair wires or close pair wires for this
connection.
●
Fire risk! Do not connect braking resistor directly to DC bus.