DOLD special-purpose measuring relays, available from ELTRON, are advanced devices designed for non-standard applications that require exceptional reliability and compliance with stringent standards. They are used, among others, in power generation systems, emergency power supply, medical infrastructure and renewable energy.

The ELTRON range includes, among others:

For power generators:

• RP 9800 / RP 9810 / RP 9811 – voltage and frequency control modules compliant with VDE-AR-N 4105 and international standards, with relay outputs and delay function,
• MK 9143N / MH 9143 – mains frequency control relays for single-phase and three-phase systems.

For medical applications:

• IP 9109 / IP 9110 / IP 9111 – voltage relays and current and temperature control modules compliant with DIN VDE 0100-710, designed for hospitals, operating theatres and IT systems,
• IN 5880 / IR 9112 – insulation monitoring and network status monitoring modules for medical systems,
• IK 9076 – compact module for fault detection in low-voltage medical circuits.

For battery systems and emergency power supply:

• BA 9054/331 and 332 – relays for monitoring voltage status, short circuits and battery sulphation – essential in UPSs and critical installations.

For renewable energy:

• BO 5877/011 – voltage relay designed specifically for monitoring motors in wind turbines.

Other special applications:

• AI 940 – safety relay that interrupts the circuit when the permissible current is exceeded, used in non-standard industrial applications.

DOLD relays for special applications, offered by ELTRON, meet the highest quality and safety standards. They enable flexible integration into existing infrastructure and effective protection of critical points in the installation.