LXCVR AC Voltage Monitoring Relay

  • Under and Over voltage monitoring (Window)
  • Monitors own supply
  • Adjustable Trip levels
  • Adjustable Time delay
  • SPDT Relay output
  • 17.5mm wide, DIN Rail mount
  • UL Listed

When power is applied, the output relay will energise provided the monitored supply voltage is above the set Under voltage trip level and below the set Over voltage trip level.

Under voltage:
If the voltage decreases below the set Under voltage trip level, the relay will de-energise. The voltage must increase above the trip level plus the set hysteresis setting before the relay will re-energise.

Over voltage:
If the voltage increases above the set Over voltage trip level, the relay will de-energise. The voltage must decrease below the trip level minus the set hysteresis setting before the relay will re-energise.

  • Monitoring function: Under/Over voltage
  • Trip level: Under: 75 – 95%/Over: 105 – 125%
  • Hysteresis: ≈2%
  • Time delay: 0.2 – 10s
  • Output: SPDT 8A @ 250V (AC1)
  • Dimensions(mm): W:17.5 x H:89 x D:66.5

Monitored supply voltage options*:
115V AC (Order Code: 99-3006)
230V AC (Order Code: 99-3007)

* To be specified when ordering

Distributors Stock Code Link
RS Components 8505395 (230VAC) Go to product
RS Components 8505398 (115VAC) Go to product
Farnell 2520636 (230VAC) Go to product
Farnell 2677809 (115VAC) Go to product

Typical applications include:

  • Single-phase machinery panels
  • HVAC and refrigeration systems
  • Building services supply panels
  • Single-phase pump installations

Key benefits:

  • Helps inhibit operation on unsuitable voltage — The relay de-energises when sustained undervoltage or overvoltage is detected, allowing an external contactor or control input to stop equipment.
  • Matches equipment requirements — Adjustable lower and upper thresholds allow the voltage window to be selected for the monitored single-phase AC supply.
  • Reduces unnecessary trips — The adjustable trip delay helps accommodate brief supply variations before a normal threshold fault changes the output.
  • Simplifies panel installation — Own-supply monitoring and a compact DIN-rail housing allow voltage supervision without a separate auxiliary supply.

Alternative product:

Icon: switch product
LCVR/2 AC Voltage Monitoring Relay
  • Under and Over voltage monitoring
  • Monitors own supply
  • Selectable nominal voltages
  • Adjustable Trip levels
  • Adjustable Time delay
  • 2 x SPDT Relay output
  • 17.5mm wide, DIN Rail mount
  • UL Listed
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VIDEO HERE
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