4 Electrical Installation
4.1 Safety Instructions
See chapter 2 Safety for general safety instructions.
WARNING
INDUCED VOLTAGE
Induced voltage from output motor cables that run
together can charge equipment capacitors even with the
equipment turned o and locked out. Failure to run
output motor cables separately or use shielded cables or
metal conduits could result in death or serious injury.
•
run output motor cables separately, or
•
use shielded cables or metal conduits
CAUTION
SHOCK HAZARD
The adjustable frequency drive can cause a DC current in
the PE conductor. Failure to follow the recommendation
means that the RCD may not provide the intended
protection.
•
When a residual current-operated protective
device (RCD) is used for protection against
electrical shock, only an RCD of Type B is
permitted on the supply side.
NOTICE!
The adjustable frequency drive is supplied with Class 20
motor overload protection.
Overcurrent protection
•
Extra protective equipment, such as short-circuit
protection or motor thermal protection between
adjustable frequency drive and motor, is required
for applications with multiple motors.
•
Input fusing is required to provide short circuit
and overcurrent protection. If not factory-
supplied, the installer must provide fuses. See
maximum fuse ratings in chapter 8.4 Fuses.
Wire type and ratings
•
All wiring must comply with local and national
regulations regarding cross-section and ambient
temperature requirements.
•
Power connection wire recommendation:
minimum 167 °F [75 °C] rated copper wire.
See and chapter 8.3 General Technical Data - Adjustable
Frequency Drive for recommended wire sizes and types.
4.2
Electromagnetic Compatability (EMC)
To obtain an EMC-compliant installation, follow the
instructions provided in chapter 4.4 Grounding,
chapter 4.3 Power Connections, chapter 4.8 Control Wiring,
and chapter 4.6 Motor Connection.
Electrical Installation Installation Manual
MG37A322 Danfoss A/S © Rev. 04/2015 All rights reserved. 35
4 4
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