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Multifunction monitors


DOLD multifunction relays, available from ELTRON, combine measurement, diagnostic and protective functions in a single device, simplifying the design and operation of single-phase and three-phase installations. They are ideal solutions for systems requiring compact and versatile protection – both in industry and building automation.

Depending on the model, these relays enable:

  • Simultaneous monitoring of voltage, asymmetry, sequence and phase failure, as in the MK 9300N model, which supports systems up to 690 V and allows adjustment of the response time,
  • Monitoring of phases with thermal motor protection – e.g. IL 9086 – which increases the protection of three-phase motors against overheating and power supply faults,
  • Voltage monitoring with detection of too low and too high values, as in IL 9077, available in versions with two or four relay outputs,
  • Integrated transformer protection, current and temperature monitoring – model IP 9111/107 is a comprehensive protection solution used, for example, in medical power supply systems.

Selected devices, such as the BD 9080 and IL 9087, offer extended phase diagnostics, including asymmetry, overvoltage and undervoltage detection, while maintaining compact dimensions (from 22.5 mm).

Multifunctional DOLD relays, available from ELTRON, significantly reduce the number of components in switchgear, shortening installation time and simplifying configuration. These are proven solutions for machine manufacturers, HVAC system installers, automation and maintenance departments.

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Table of available multifunctional relays

TypeDescriptionDesigned for systemsMeasuring rangeMaximum measuring rangeSwitching outputsResponse delay adjustmentRequired supply voltageEnclosure width (mm)Data Sheet
MK 9300N, MH 9300multifunctional measuring relay1- / 3-phase3 AC, 24 ... 690 V...690 V1 C/O, 2 x 1 C/O++22.5, 45
MK9300N, MH9300.pdf
BD 9080phase monitor3-phase3 AC 400 V690 V2 C/O++45
BD9080.pdf
IL 9086, SL9086phase monitor with thermistor motor protection3-phase3/N AC 400/230 V400 V2 C/O35
IL9086, SL9086.pdf
IL 9087, SL 9087phase monitor3-phase3/N AC400 V1 C/O;35
IL9087, SL9087.pdf
IP 9111/107transformer protection module, current and temperature control1-phase5 … 50 A;50 A2 x 2 C/O+70
IP9111_107.pdf
IL 9077, IP 9077, SL 9077, SP 9077undervoltage/overvoltage monitor3-phaseAC 400 V480 V2 C/O, 4 C/O+35, 70
IL9077, IP9077, SL9077, SP9077.pdf

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E-mail: kontakt@eltron.pl

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Address:
ELTRON Spółka z ograniczoną
odpowiedzialnością Sp. k.
ul. Brodzka 10B
54-103 Wrocław

Customer Service:
Telefon: +48 71 343 97 55
E-mail: kontakt@eltron.pl

Find us elsewhere: