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

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.

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  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…
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  CMVD4-U200N – voltage monitoring relay with 4 C/O contacts

  Plug-in electronic customizable voltage monitoring relay with optional delay-on and delay-off timer function and four change-over contacts. Fully customizable according to customer’s requirements concerning voltage monitoring type and timing diagram. CMVD4 can provide multiple voltage thresholds (adjustable) for both pull-in and drop-out voltages with different timing delays. The relay can also be supplied with a fixed pull-in and drop-out voltage. The delay times are also adjustable (either delay-on or delay-off,…
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  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…
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  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…
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  DI-U900N Plug-in railway relay with 2 contacts

  The DI-U900N is the improved version of the DI-U900 2-pole current monitoring relay. The dimensions, pinning and specifications are identical but it is much more reliable switching very low currents (1 mA @ 5 VDC). It is therefore the perfect relay to switch mixed loads. The built-in magnetic arc blow-out ensures adequate DC breaking capacity resulting in long contact life and the now integrated contact separation prevents cross pollution of…
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  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…
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  MTDV4-U200N relay – Voltage monitoring, timer delay-on /-off, 4 pole

  Plug-in electronic railway voltage monitoring relay withfour change-over contacts for reliable switching of very lowcurrents (1 mA @ 5 VDC) up to currents of 10A @ 110VDC. The relay has optionally a delay on pull-in and/or on dropout.The delay time is adjustable with a lockable knob(either delay-on or delay-off, the other delay is fixed). Therelay can also be supplied with fixed time delays (no knob).The pull-in voltage (Uon) and drop-out…
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  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…
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  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…
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  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…
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  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…
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  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…