Three-phase digital voltage protective relay with phase sequence control (without neutral conductor), DGK-04F

Digital three-phase voltage protective relay, DIN rail mounted, "Tense"

The microprocessor protective relay "Tense DGK-04F" is designed to comprehensively protect sensitive industrial equipment and motors from dangers related to voltage fluctuations in three-phase networks. The device continuously monitors the overall voltage and provides highly accurate protection against overvoltage, earth voltage, and incorrect phase sequence. A feature of this model is connection without the need to connect a neutral wire (asymmetric/three-wire networks).

The relay is equipped with digital displays that immediately show the status of individual phases. The user can precisely set voltage threshold values and time delay to filter out short-term network peak fluctuations and avoid unwanted activation. The compact modular design ensures easy mounting on a standard 35 mm DIN rail.

Main functions and protections

• Overvoltage and undervoltage protection: automatically disconnects the output if the voltage exceeds or falls below set limits.

• Phase sequence control: prevents motors from running in reverse if phases are connected incorrectly.

• Without neutral wire (Non-Neutral): Ideal for systems without or not requiring an N wire.

Technical specifications

• Product type: Digital voltage protection relay

• Number of phases: 3 (three-phase connection without N)

• Rated operating voltage ($U_n$): 3× 380 V AC (50/60 Hz)

• Mounting method: 35 mm DIN mounting rail / mounting panel

• Output contact: 5 A / 250 V AC (reactive load)

Setting ranges

• High Voltage Protection: 400 – 460 V AC (adjustable)

• Low Voltage Protection: 230 – 360 V AC (adjustable)

• Error Waiting Time: 0.1 – 10 s (adjustable)