2.2.3 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
•
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 sizes
J6–J7) or remove the RFI screw (enclosure sizes
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 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.
130BC501.10
01
02
03
04
05
Illustration 2.4 Mains, Motor and Ground Connections for
Enclosure Sizes J1–J5
130BD648.11
Illustration 2.5 Mains, Motor, and Ground Connections for
Enclosure Size J7
displays mains input, motor, and grounding
for enclosure sizes J1–J5.
displays mains
input, motor, and grounding for enclosure size J7. Actual
configurations vary with unit types and optional
equipment.
Product Overview
Design Guide
MG06B402
Danfoss A/S © 09/2014 All rights reserved.
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