DOLD MK9300N Multifunction Measuring Relay

04-03-2026

Replace nine single-function relays with one intelligent device.

The MK9300N Multifunction Measuring Relay from the VARIMETER® PRO series combines extensive electrical monitoring functions within a compact 22.5mm wide unit. By replacing multiple individual measuring relays, it reduces component count, frees valuable DIN-rail space and minimises wiring effort.

Designed for automation, industrial plant and building services applications, the MK9300N simultaneously monitors up to nine electrical parameters in single- and three-phase networks:

• Overvoltage and undervoltage

• Voltage asymmetry

• Overcurrent and under current

• Cos φ (power factor)

• Active, apparent and reactive power

• Frequency

• Phase sequence

This consolidated approach improves system visibility while supporting high operational reliability and availability.

For detailed technical information, review our MK9300N datasheets

Designed for Fast Fault Diagnosis When faults occur, rapid diagnosis is critical. The MK9300N features: A clear, integrated display A multicoloured LED status indicator Intuitive menu-guided operation Structured menu system allows simple and user-friendly configuration Response values for all monitoring functions can be easily adjusted to suit the specific application without complex setup.

Typical Applications:

The MK9300N is ideally suited for a wide range of monitoring and protection tasks, including:

Monitoring of single and three-phase loads

• Emergency power supply systems

• Voltage-dependent switching for under- and overvoltage conditions

• Voltage monitoring of portable equipment

• Motor protection in the event of phase failure

• Transformer protection against asymmetric loads

• Frequency monitoring on inverter outputs

Its multifunction capability makes it ideal where panel space is limited, or several electrical parameters must be monitored within one system.

Key Benefits at a Glance:

• Monitoring of up to nine electrical parameters in one device

• Replacement of multiple single-function relays

• Reduced wiring and panel space requirements

• Clear diagnostics via display and LED indication

• Simple, menu-driven configuration

• One configurable output relay

• Proven VARIMETER® PRO reliability

Have a specific enquiry or project in mind?

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