EKRM-3 controller

At indirect connection via current transformers the controller can be used in lines on any tension.

Protective shutdown is carried out by short-term (100 mS) switchings of the operating contact influencing executive body: electromagnet of the contactor or actuator, electromagnet of the trigger mechanism of the automatic switch (rastsepitel).

The operating contact of the controller switches a chain of direct or alternating current to 20 A at a voltage up to 240 V and works for short circuit or disconnection of a chain of management at an emergency shutdown.

The controller provides four-level adjustable protection on current on three phases of a network:

• on the level of current of the minimum loading Imin - with an adjustable delay of operation of Tmin;
• on Inom overload current level - with an adjustable delay of operation of Tnom;
• on the level of current of the maximum protection Imax - with an adjustable delay of operation of Tmax;
• on Iots overcurrent level - with an unregulated delay of operation.

The controller is manufactured eight face values on the range of controlled currents from 0.4 to 6250 And. At connection via current transformers the range of controlled currents can be expanded to 100 KA.

The controller provide registration of date, time, controlled currents and a cause of accident at the time of an emergency shutdown.

The controller keeps in memory parameters of eight last on time of emergency shutdowns.