Monitoring relays

A Monitoring Relay is a protective control device. The basic functions are to receive input signals, monitor and determine them, and output an alarm signal if a set value (threshold) is reached. Monitoring Relays monitor power supplies (voltage, current, power, phase), temperatures, and other analog signals and detects abnormalities in machines and equipment by determining values against alarm thresholds.

Time Chart

Monitoring Relays Time Chart Voltage monitoring relay with optional delay-on and delay-off timer function offers a very small hysteresis (difference between pull-in and drop-out voltage). The relay is equipped with a LED which indicates the status of the relay contacts and activation of the time delay.
  • CMP relay – Current monitoring AC input

    Current monitoring railway relay with two change-over contacts. Suitable for AC currents (16-60 Hz) and no auxiliary power supply necessary. The pull-in current is adjustable with a lockable knob. The contacts are weld-no-transfer contacts: they are mechanically forced in the same position. The construction of the relay and choice of materials makes the CMP relay suitable to withstand corrosive atmospheres, low and high temperatures, shock & vibrating and dry to…
  • CU/CP-U900-D relay – Current monitoring

    Miniature current monitoring railway relay with one change-over and one normally open contact. Suitable for AC currents. The contacts are weld-no-transfer contacts: they are mechanically forced in the same position. Very sensitive and high insulation between coil and contact. Relay for plug-in mounting (CU version) or for PCB mounting (CP version). The construction of the relay and choice of materials makes the CU/CP-U900-D relay suitable to withstand corrosive atmospheres, low…
  • CU/CP-U900-I relay – Current monitoring

    Miniature current monitoring railway relay with one change-over contact. Suitable for AC or DC currents. Very sensitive and high insulation between coil and contact. Relay for plug-in mounting (CU version) or for PCB mounting (CP version). The construction of the relay and choice of materials makes the CU/CP-U900-I relay suitable to withstand corrosive atmospheres, low and high temperatures, shock & vibrating and dry to very humid environments. With a very…
  • DI-U900 relay – Current monitoring

    Plug-in current monitoring railway relay with two change-over contacts. Suitable for AC or DC currents. Proven reliable operation in switching high DC voltage / inductive loads and low currents. Standard equipped with magnetic arc blow-out for high breaking capacity and long contact life. No external retaining clip needed as integrated ‘snap-lock’ will hold relay into socket under all circumstances and mounting directions. The construction of the relay and choice of…
  • IB 200 relay – Current monitoring

    This current sensor feeds a 2 changeover relay contacts for a measured current from 16 A to 24 A. A potentiometer allows the setting of the relay pick up from 15 A to 25 A. The maximal admissible current of the shunt is 50 A, other versions are available. An 110 VDC auxiliary power supply is needed for the measure and the relay command. The electronic device is put in…
  • MTDV4-U200 relay – Voltage monitoring, timer delay-on /-off, 4 pole

    Plug-in electronic voltage monitoring relay with optional delay-on and delay-off timer function and four change-over contacts. The delay time is adjustable with a lockable knob (either delay-on or delay-off, the other delay is fixed). The relay can also be supplied with fixed time delays (no knob). The pull-in voltage and drop-out voltage are both adjustable via internal screws. The relay can also be supplied with a fixed pull-in and drop-out…
  • RC-19A relay – Current monitoring

    Current monitoring railway relay with one change-over contact. Suitable for AC currents. The input consists of a ring core saturation transformer: place the wire with current to monitor simply through the transformer. Ease of installation and high continuous overcurrent possible. Protection against short circuit and low impedance. The relay is also suitable for earthfault protection. Adjusting the pull-in current for lower values by multiple threading through the transformer. The construction…
  • UB 001 relay – 1 level load shedding

    The voltage monitoring relay UB 001 opens auxiliary loads circuits when battery voltage becomes too low and puts them back in service when battery voltage recovers. A time delay of 20 seconds engages before opening a load circuit and a time delay of 2 seconds before putting back in service a load. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need to be disconnected…
  • UB 002 relay – 2 Level load shedding

    The voltage monitoring relay UB 002 opens auxiliary loads circuits when battery voltage becomes too low and puts them back in service when battery voltage recovers. A time delay of 20 seconds engages before opening a load circuit and a time delay of 2 seconds before putting back in service a load. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need to be disconnected…
  • UB 003 relay – 3 Level load shedding

    The voltage monitoring relay UB 003 opens auxiliary loads circuits when battery voltage becomes too low and puts them back in service when battery voltage recovers. A time delay of 20 seconds engages before opening a load circuit and a time delay of 2 seconds before putting back in service a load. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need to be disconnected…
  • UB 200 relay – Voltage monitoring

    The voltage monitoring relay UB 200 opens auxiliary loads circuits when battery voltage becomes too low and puts them back in service when battery voltage recovers. A time delay of several seconds (to be defined) engages before opening a load circuit and a time delay of several seconds (to be defined) before putting back in service a load. The plug-in design offers secure locking feature for maximum ease of maintenance…
  • UB A400 relay – Voltage monitoring

    The voltage monitoring relay UB A400 opens auxiliary loads circuits when battery voltage becomes too low and puts them back in service when battery voltage recovers. A time delay of 20 seconds engages before opening a load circuit and a time delay of 2 seconds before putting back in service a load. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need to be disconnected…
  • UB C200 relay – Voltage monitoring

    The voltage monitoring relay UB C200 opens auxiliary loads circuits when battery voltage becomes too low and puts them back in service when battery voltage recovers. A time delay of several seconds (to be defined) engages before opening a load circuit and a time delay of several seconds (to be defined) before putting back in service a load. The plug-in design offers secure locking feature for maximum ease of maintenance…
  • UMD-U300 relay – Voltage monitoring, AC input

    Plug-in electronic voltage monitoring relay with one change-over contact and one normally open contact, suitable for AC voltages with a frequency of 50/60 Hz. The pull-in voltage is adjustable with a lockable knob. The relay can also be supplied with a fixed pull-in voltage (no knob). The UMD-U300 offers a very small hysteresis (difference between pull-in and drop-out voltage) and does not need an auxiliary supply. The relay is equipped…
  • UTC relay – Voltage monitoring & off delay

    The time delay relay UTC incorporates also a voltage control function. The time delay is initiated by an impulse on the relay command which also closes the contact. The time delay relay can be initiated if the input voltage d0 is higher than the voltage control threshold. If the input voltage d0 is lower than the voltage control threshold, then the time delay is reset to 0, the contact is…