Top 12 Voltage Monitoring Relays

A monitoring relay is a guarding tool whose fundamental purpose is to take in input signals, check and deduce them, and deliver output as an alarm signal once it reaches the threshold. Monitoring relays check phase, current, voltage, temperature and analogue signals and determine malfunctions in the gadget by detecting values against warning signals.

Browse Best Voltage Monitoring Relays

ICStation 1CH DC 3V 3.3V Relay Power Switch Module with Optocoupler High Level ...

  • Brand Name: IS
  • Model Name: 1CH DC 3.3V Relay Switch Module
  • Size Options: 1CH DC 3.3V
  • Color Options: Black
  • Item Weight: 1.34 ounces
  • Satisfaction Score: 95%
  • Dimensions: 4.5 x 2.6 x 0.6 inches; 1.34 Ounces
  • Overall Score: 9.1
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SINOTIMER SVP-912 63A 110V 120V Manual Adjustable Voltage Relay DIN Rail Over ...

  • Brand Name: MCR
  • Model Name: SVP912-1-63A
  • Item Weight: 6.7 ounces
  • Satisfaction Score: 100%
  • Dimensions: 3.55 x 2.76 x 1.56 inches
  • Overall Score: 0
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Onyehn 1 Channel DC 3V Relay High Level Driver Module Optocoupler Relay Module ...

  • Brand Name: Onyehn
  • Satisfaction Score: 82%
  • Dimensions: 6.5 x 3.9 x 0.9 inches; 3.99 Ounces
  • Overall Score: 9.9
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TVR2000-9 480VAC Phase Sequence Protector, Overvoltage and Undervoltage Protector ...

  • Brand Name: Garosa
  • Model Name: Garosa9ga530fvq7
  • Item Weight: 3.53 ounces
  • Satisfaction Score: 100%
  • Overall Score: 9.9
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NTE Electronics R95-113 8 Pin Octal Socket with Pressure Clamp Screw, Panel/Surface ...

  • Brand Name: NTE Electronics
  • Model Name: R95-113
  • Size Options: One Size
  • Color Options: One Color
  • Satisfaction Score: 100%
  • Dimensions: 5.91 x 5.91 x 5.91 inches; 0.35 Ounces
  • Overall Score: 9.3
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Maxmartt Generator Battery Charger, 12V/24V 10A Diesel Generator Genset Intelligent ...

  • Brand Name: Maxmartt
  • Item Weight: 1.54 pounds
  • Satisfaction Score: 100%
  • Dimensions: 7.09 x 6.69 x 1.97 inches
  • Overall Score: 9.9
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Time Mark Corporation A257B Relay; SSR; Phase Monitor; SPDT; Cur-Rtg 10A; Ctrl-V ...

  • Brand Name: Time Mark
  • Model Name: D341019-A257B
  • Satisfaction Score: 100%
  • Dimensions: 6.5 x 4.63 x 4 inches; 5.08 Ounces
  • Overall Score: 9.9
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Warrick 26B1A0 Series 26 Low Water Cutoff- Standoff Mount

  • Brand Name: Warrick
  • Model Name: 26B1A0
  • Satisfaction Score: 100%
  • Dimensions: 3.8 x 2.6 x 1.7 inches; 8 Ounces
  • Overall Score: 9.9
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ICM Controls ICM401 Three-Phase Line Voltage Monitor Offering Protection Against ...

  • Brand Name: ICM
  • Model Name: ICM401
  • Color Options: Multicolor
  • Satisfaction Score: 78%
  • Dimensions: 6 x 6 x 6 inches; 4.8 Ounces
  • Overall Score: 8.7
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Diversitech DTP-3 Digital 3-Phase Motor Protector

  • Brand Name: Diversitech
  • Model Name: DTP-3
  • Item Weight: 12.3 ounces
  • Satisfaction Score: 100%
  • Dimensions: 7.65 x 7.65 x 1.2 inches; 12.35 Ounces
  • Overall Score: 9.5
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NTE Electronics R95-119 11 Pin Octal Socket with Solder Terminal Screw, Panel ...

  • Brand Name: NTE Electronics
  • Model Name: R95-119
  • Satisfaction Score: 100%
  • Dimensions: 5.51 x 2.99 x 1.1 inches; 0.32 Ounces
  • Overall Score: 8.7
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SymCom MotorSaver 3-Phase Voltage Monitor, Model 460-L, 190-480V, Fixed Unbalance ...

  • Brand Name: Symcom
  • Model Name: 460-L
  • Item Weight: 0.010 ounces
  • Satisfaction Score: 100%
  • Dimensions: 2.35 x 2.08 x 3.5 inches; 0.01 Ounces
  • Overall Score: 8.9
Store Website:

Voltage Monitoring Relays Buying Guide

Voltage monitoring relays be formulated for both Single-phase and triple-phase networks. The ones that are employed in triple-phase networks are termed Phase monitoring relays. When the voltage falls down the extreme value, power is reinstalled to the load as the relay be re-energized back and contact is lost.

VMR for single-phase AC/DC voltages

To monitor voltages under AC/DC supply in single-phase, ABB's CM consists of a broad choice of impactful and compacted equipment incorporating onl0.89-inch breadth. The range assimilates relays of over-voltage and under-voltage protection from 3V to 600V. The CM range added in the electrical structure contributes to the highest safety and reliability. The relays have 2 c/o connections, as one device adds up 4 measurement ranges: 3-30V, 6-60V, 30-300V, 60-600V.

Three-Phase Voltage monitoring relays

When in a three-phase system, over-voltage and under-voltage fall as the voltages in all the three phases, elevate and fall simultaneously. To detect whether there is an overvoltage or under-voltage condition, the relay checks the average voltage of all three lines and compares them with the set point of the voltage. If an inadequate sequence of phase or phase loss is found out, a signal is sent out to instruct the LPC.


 Voltage monitoring relays not only determine under-voltage or over-voltages but also decode issues such as phase imbalances, phase sequence or phase loss. Voltage monitoring relays with selective delay-off plus delay-on features propose a small gap between pull-in and drop-out voltages called hysteresis in other words. There is no auxiliary power supply mandatory for such relays. Also available with steady delays in time plus 1 LED is provided for indication of relay status of connections and activation of delay time.

Categories Simillar to Voltage Monitoring Relays

Categories Simillar to Voltage Monitoring Relays includes Electromechanical Relays, Solid State Relays and Electrical Relays