Design Guide | VLT® AutomationDrive FC 360
7 Electrical Installation Considerations
7.1 Safety Instructions
See the chapter 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.
l Run output motor cables separately or use shielded cables.
l 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. Failure to follow the
recommendation means that the RCD cannot provide the intended protection.
l When a residual current-operated protective device (RCD) is used for protection against electrical shock, only an RCD of Type
B is allowed on the supply side.
Overcurrent protection
l Extra protective equipment such as short circuit protection or motor thermal protection between drive and motor is required for
applications with multiple motors.
l 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 the chapter Fuses and Circuit Breakers.
Wire type and ratings
l All wiring must comply with local and national regulations regarding cross-section and ambient temperature requirements.
l Power connection wire recommendation: Minimum 75 °C (167 °F) rated copper wire.
See the chapter Cable Lengths and Cross-sections 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 © 2024.01 AJ435824192086en-000101 / 130R1295 | 49
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