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Multifunctional measuring relay

Now also approved for use on ships


Multifunctional measuring relay MK 9300N

With the MK 9300N of the VARIMETER PRO series, DOLD combines up to nine monitoring functions in a housing only 22.5 mm wide. This universal measuring and monitoring relay thus offers a functional diversity unparalleled so far at this minimal unit width.


Troublefree and economic operation of machines and systems is guaranteed only by the reliable and continuous monitoring of three-phase systems. Depending on the need, the VARIMETER PRO therefore monitors the three-phase system simultaneously for overvoltage/ undervoltage, voltage asymmetry, overcurrent/undercurrent, cos phi, active power, apparent power and reactive power, frequency and phase sequence. Employment in single-phase systems is also possible.


To facilitate simple fault diagnostics, this all-rounder features a display and a multicoloured LED. The user-friendly device configuration permits optimal adjustment to the application. For example, the response values for all monitoring functions can be easily set. The space-saving multifunctional measuring relay is optionally equipped with one or two output relays, independently configurable.


The device offers a wide scope of applications with the large measuring voltage range from 3 AC 24...400/690 V and the auxiliary voltage ranges from DC 24 V or AC/DC 110...400 V. The MK 9300N is used in pumps, ventilators, crushers, signal systems as well as mobile systems such as refrigeration containers. In addition, a DNV GL certificate predestines the multifunctional measuring relay for use in shipbuilding and marine technology.