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Contactors and Relays
Measurement and monitoring relay EMR4
 
Phase monitoring relay EMR4-W
Klockner Moeller EMR4-W
The phase monitoring relay EMR4-W monitors as well as the field rotation also the voltage height. That means protection against destruction or damage of single system parts. Here the minimum low voltage and also the maximum over voltage can be easily set, within a defined range, to the required voltage.

Also a delayed on or a delayed off can be set. In the delayed on position short voltage breaks can be bridged. The delayed off position allows for a failure storage for the set time. The delay time can be set between 0.1 und 10 s.

The relay activates with the correct rotation and voltage. After drop-out the device reactivates when a the voltage exceeds a 5 % hysteresis.
 
 
 

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