Electrical Installation Considerations; Safety Instructions - Danfoss VLT AutomationDrive FC 302 Design Manual

Electrical Installation Con...

10 Electrical Installation Considerations

10.1 Safety Instructions

See chapter 2 Safety for general safety instructions.
WARNING
INDUCED VOLTAGE
Induced voltage from output motor cables from different
drives that are run together can charge equipment
capacitors even with the equipment turned off and
locked out. Failure to run output motor cables separately
or use shielded cables could result in death or serious
injury.
•
Run output motor cables separately or use
shielded cables.
•
Simultaneously lock out all the drives.
WARNING
SHOCK HAZARD
The drive can cause a DC current in the ground
conductor and thus result in death or serious injury.
•
When a residual current-operated protective
10 10
device (RCD) is used for protection against
electrical shock, only an RCD of Type B is
allowed on the supply side.
Failure to follow the recommendation means that the
RCD cannot provide the intended protection.
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VLT® AutomationDrive FC 302
Overcurrent protection
•
•
Wire type and ratings
•
•
See chapter 7.6 Cable Specifications for recommended wire
sizes and types.
CAUTION
PROPERTY DAMAGE
Protection against motor overload is not included in the
default setting. To add this function, set
parameter 1-90 Motor Thermal Protection to [ETR trip] or
[ETR warning]. For the North American market, the ETR
function provides class 20 motor overload protection in
accordance with NEC. Failure to set parameter 1-90 Motor
Thermal Protection to [ETR trip] or [ETR warning] means
that motor overload protection is not provided and, if
the motor overheats, property damage can occur.
Danfoss A/S © 01/2018 All rights reserved.
Extra protective equipment such as short-circuit
protection or motor thermal protection between
drive and motor is required for applications with
multiple motors.
Input fusing is required to provide short circuit
and overcurrent protection. If fuses are not
factory-supplied, the installer must provide them.
See maximum fuse ratings in chapter 10.5 Fuses
and Circuit Breakers.
All wiring must comply with local and national
regulations regarding cross-section and ambient
temperature requirements.
Power connection wire recommendation:
Minimum 75 °C (167 °F) rated copper wire.
MG38C202