Danfoss iC2-Micro Series - Power Cable; Power Cable Considerations

The control unit may attempt to correct the ramp if possible (parameter P 2.3.1 Overvoltage Controller Enable). The drive turns off to
protect the transistors and the DC-link capacitors when a certain voltage level is reached.
To select the method used for controlling the DC-link voltage level, see parameter P 2.3.1 Overvoltage Controller Enable, parameter P
3.2.1 Enable Brake Chopper, and parameter P 4.4.2.1 Enable AC-Brake.
Mains drop-out
During a mains drop-out, the drive keeps running until the DC-link voltage drops below the minimum stop level, which is:
l 180 V for 1x100–120 V.
l 180V for 1x200–240V.
l 202 V for 3x200–240 V.
l 314V for 3x380–480V.
The mains voltage before the drop-out and the motor load determines how long it takes for the inverter to coast.
Static overload in VVC+ mode
When the drive is overloaded, the torque limit in parameter P 5.10.1 Motor Torque Limit/parameter P 5.10.2 Regenerative Torque Limit is
reached, the control unit reduces the output frequency to reduce the load.
If the overload is excessive, an overcurrent which makes the drive cut out after approximately 5–10s may occur.
Operation within the torque limit is limited in time (0–60s) in parameter P 5.10.6 Trip Delay at Torque Limit.
Torque limit
The torque limit protects the motor from being overloaded independent of the speed. Torque limit is controlled in parameter P 5.10.1
Motor Torque Limit and parameter P 5.10.2 Regenerative Torque Limit. Parameter P 5.10.6 Trip Delay at Torque Limit controls the time
before the torque limit warning trips.
Current limit
Parameter P 2.7.1 Output Current Limit %controls the current limit, and parameter P 2.7.5 Trip Delay at Current Limit controls the time
before the current limit warning trips.
Minimum speed limit
Parameter P 5.8.3 Motor Speed Low Limit [Hz] sets the minimum output speed that the drive can provide.
Maximum speed limit
Parameter P 5.8.2 Motor Speed High Limit [Hz] or parameter P 2.3.14 Max Output Frequency sets the maximum output speed that the
drive can provide.
7.9 Power Cable
7.9.1 Power Cable Considerations
When selecting power cables, consider:
l All wiring must comply with local and national regulations regarding cross-section and ambient temperature requirements.
l Drives are designed for use with 70 °C (158 °F) rated copper cables. Unless otherwise stated, the ambient temperature of the drive
matches the cable rating.
l Aluminum conductors are not recommended. When using aluminum conductors, ensure that the conductor surface is clean and the
oxidation is removed and sealed by a neutral acid-free grease before connecting the conductor. Retighten the terminal screw after 2
days due to the softness of aluminum. It is crucial to keep the connection a gas-tight joint, otherwise the aluminum surface oxidizes
again.
88 | Danfoss A/S © 2024.08 AJ402315027937en-000401 / 130R1239
Design Guide | iC2-Micro Frequency Converters Electrical Installation Considerations