Design Guide | iC2-Micro Frequency Converters iC2-Micro Frequency Converters
3.6.6.3 Motor Protection Features
The drive provides various features to protect the motor and the application.
The output current measurement provides information to protect the motor. Overcurrent, short circuit, ground faults, and lost motor
phase connections can be detected and relevant protections initiated.
Monitoring of speed, current, and torque limits provides an additional protection of the motor and the application.
Locked rotor protection secures that the drive is not starting with a blocked rotor of the motor.
Motor thermal protection is provided either as a calculation of the motor temperature based on the actual load or by the means of
external temperature sensors, for example PTC.
3.6.6.4 Protection of Externally Connected Components
Externally connected options like brake resistors can be monitored.
Brake resistors are monitored for thermal overload, short circuit, and missing connection.
3.6.6.5 Automatic Derating
Automatic derating of the drive allows continued operation even if the nominal operation conditions are exceeded. Typical factors
affecting this are temperature, high DC-link voltage, high motor load, or operation close to 0 Hz. Derating is typically applied as a
reduction in switching frequency or change in switching pattern, resulting in lower thermal losses.
3.6.7 Monitoring Features
3.6.7.1 Monitoring Features Overview
The drive offers a wide range of monitoring features providing information of operation conditions, grid conditions, and drive historical
data. Access to this information helps out analyzing operational conditions and identification of faults.
3.6.7.2 Speed Monitoring
The motor speed can be monitored during operation. If the speed exceeds minimum and maximum limits, the user is notified and can
initiate appropriate actions.
3.6.7.3 Event Log and Operational Counters
An event log provides access the latest registered faults, providing relevant information for analysis of what occurred in the drive.
Operational counters offer information about the drive usage. Values like operation hours, running hours, kWh used, number of power-
ups, overvoltages, and overtemperatures are examples of the readouts available.
3.6.8 Software Tools
3.6.8.1 Software Tools Overview
Danfoss offers a suite of desktop software tools which have been designed to provide easy operation and the highest level of
customization of AC drives.
APIs and the Danfoss Device Interface enable integration of the tools into proprietary systems and business processes. The MyDrive®
tools support the entire life cycle of the drive, from system design to service. Some of the tools are available free of charge, and some
require a subscription.
For more information about the MyDrive® tools, see MyDrive documentation.
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