Universal Motor Controller Block UMC100_NC

Protection Functions
•The UMC provides comprehensive motor protection including phase failure detection, adjustable motor protection for stalled motors during startup or normal operation, configurable current limits to generate trips or warnings and many more.
•Overload classes 5E, 10E, 20E, 30E and 40E
•Thermistor motor protection (PTC)
•Earth fault detection (e.g. when used in IT networks)
•Power and voltage based protection functions
•Supervision of the network quality (Total Harmonic Distortion)
•One device type covers the whole current range starting from 0.24 up to 63 A. For higher currents up to 850 A additional current transformers are available.

Fieldbus Communication
•The UMC100 can be integrated into different fieldbus networks such as PROFIBUS DP , DeviceNet, MODBUS and CANopen via the FieldBusPlug interface. All measured data, status signals and parameters can be accessed via fieldbus.
• It is also possible to use the UMC100 as a stand-alone device without the Fieldbus Plug communication.
•The motor protection and motor management is fully functional in the event of a bus failure.
•The fieldbus interface and the UMC can be separated. This offers many benefits in MCC applications especially for withdrawable systems.
•Parameterisation of the protection and control functions can be carried out with the device description files as defined by the different fieldbuses (e.g. GSD for PROFIBUS). In addition a Device Type Manager (DTM) offering a very convenient device configuration via a laptop or within a control system is also available.

The upper main block contains the protection-related functions. Signals from different signal sources are evaluated from the trip unit. Depending on the configuration either a trip or a warning can be created. The motor protection always has priority regarding control of the relay outputs. In case of a protection trip the relevant contacts are opened and thereafter the motor is stopped. If the device fails, the watchdog opens the relay outputs automatically for safety reasons. There is no possibility to bypass this watchdog. The main inputs for motor protection are the current measurement and the thermistor sensor. The current measurement provides information about the actual motor current in the three phases. An advanced motor model uses the current information and calculates the corresponding motor temperature. At a certain level it will trigger an overload trip. The thermistor input measures the PTC resistance. Based on the resistance the cold and hot state of the motor can be distinguished. Also short-circuit or wire break conditions can be detected. The lower main block contains the control-related functions. Incoming commands from the panel, the digital inputs or the fieldbus are ranked from the control place selection block according to the user settings and then forwarded to the active starter function. The starter function block controls the relay outputs depending on its input signals and the actual state. Additionally monitoring signals are prepared for the LCD display, the UMC100 signalling LEDs and the fieldbus monitoring and diagnosis telegrams.
All these blocks run in the so-called logic engine. It is possible to change the application which is running there but usually the predefined applications will be sufficient. Further information about the creation of custom applications can be found in the Custom Application Editor manual.