Mains, Motor, And Ground Connections - Danfoss VLT AutomationDrive FC 360 Quick Manual

Installation
•
Ground wire of at least 10 mm
•
2 separate ground wires both complying with the
dimensioning rules
See EN 60364-5-54 § 543.7 for further information.
Using RCDs
Where residual current devices (RCDs), also known as
ground leakage circuit breakers (ELCBs), are used, comply
with the following:
•
Use RCDs of type B only, which are capable of
detecting AC and DC currents
•
Use RCDs with an inrush delay to prevent faults
due to transient earth currents
•
Dimension RCDs according to the system configu-
ration and environmental considerations
4.2.3 Mains, Motor, and Ground
Connections
WARNING
INDUCED VOLTAGE!
Run output motor cables from multiple frequency
converters separately. Induced voltage from output
motor cables run together can charge equipment
capacitors even when the equipment is turned off and
locked out. Failure to run output motor cables separately
could result in death or serious injury.
Grouding clamps are provided for motor wiring (see
Illustration 4.4).
•
Do not install power factor correction capacitors
between the frequency converter and the motor
•
Do not wire a starting or pole-changing device
between the frequency converter and the motor
•
Follow motor manufacturer wiring requirements
•
All frequency converters may be used with an
isolated input source as well as with ground
reference power lines. When supplied from an
isolated mains source (IT mains or floating delta)
or TT/TN-S mains with a grounded leg (grounded
delta), set 14-50 RFI Filter to OFF (enclosure types
J6–J7) or remove the RFI screw (enclosure types
J1–J5). When off, the internal RFI filter capacitors
between the chassis and the intermediate circuit
are isolated to avoid damage to the intermediate
circuit and to reduce earth capacity currents in
accordance with IEC 61800-3.
•
Do not install a switch between the frequency
converter and the motor in IT mains.
MG06A502
Quick Guide
2
(copper wire)
Illustration 4.4 Mains, Motor and Ground Connections for
Enclosure Type J1–J5
Illustration 4.5 Mains, Motor, and Ground Connections for
Enclosure Type J7
Illustration 4.4 displays mains input, motor, and grounding
for enclosure types J1–J5. Illustration 4.5 displays mains
Danfoss A/S © Rev. 06/2014 All rights reserved.
4 4
19