Electronic monitoring relays EMD
The EMD series monitoring relays fulfill a variety of monitoring tasks in process, plant and power engineering. The monitoring modules are available for monitoring currents (0 ... 10 A AC/DC), single-phase voltages (0 ... 300 V AC/DC) and three-phase voltages (230 V, 400 V, 500 V, 690 V).In addition, modules are available for effective power monitoring and phase monitoring such as phase sequence, phase failure and asymmetry as well as for monitoring the motor winding temperature (max. 6 PTCs) and the load (cos φ).
Current monitoring
Devices with input ranges of 0...100 mA to 0...10 A DC/AC are available for monitoring undercurrent/overcurrent or the window function. Parameters such as hysteresis, dropout delay or starting override can be set.
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Voltage monitoring
Devices for monitoring over-/undervoltage or window function in 1-/3-phase networks as well as phase parameters in 3-phase networks are available. Parameters such as hysteresis, droput delay or starting override can be set.
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Effective power monitoring.
Electronic monitoring relay for effective power monitoring in 1 and 3-phase networks, with integrated temperature monitoring of the motor winding. Two separate relay outputs can be used to set different threshold values for warning and message.
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Phase parameter monitoring
The phase sequence monitoring can monitor 400 V/230 V AC DC voltage (50/60 Hz, with or without N) for phase sequence, phase drop out and asymmetry.. A feedback detection has also been implemented.
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Thermistor monitoring
Upon delivery, the motor windings are equipped with temperature-dependent resistors for monitoring motor temperatures. The temperature-dependent resistance values can be evaluated via thermistor modules.
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Power factor monitoring
The power factor monitoring (cos φ) can monitor overload and underload in 1 or 3-phase networks.
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Filling level monitoring
Electronic monitoring relay for level monitoring of conductive liquids with "Pumping up" and "Pumping down" function.
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Power modules
In the Standard-Line (SL), the supply voltage is adapted using pluggable power modules The power module for the particular voltage supply is plugged into the SL basic module.
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