HLVA6I23 - HLV Series

Series: HLV Questions? Contact Littelfuse Support
Littelfuse Voltage Monitoring Relays
The HLV Series is a single-phase undervoltage monitor designed to protect sensitive equipment from brownout or undervoltage conditions. Time delays are included to prevent nuisance tripping and short cycling. The 30A, 1hp rated, SPDT relay contacts allow direct control of motors, solenoids and valves. The output relay can be ordered with isolated SPDT contact to allow monitoring of one voltage and switching a separate voltage. Two undervoltage trip point ranges allow monitoring of 110 to 120VAC or 208 to 240VAC systems.

Upon application of input voltage the output relay remains de-energized. When the input voltage value is above the pull-in voltage, the restart delay begins. At the end of the restart delay, the output relay energizes. When the input voltage falls below the trip point, the trip delay begins. If the input voltage remains below the pull-in voltage for the entire trip delay the relay deenergizes. If the input voltage returns to a value above the pull-in voltage, during the trip delay, the trip delay is reset and the relay remains energized. If the input voltage falls below the trip point voltage during the restart delay, the delay is reset and the relay remains de-energized. Reset is automatic upon correction of an undervoltage fault.
Reset: Removing input voltage resets the output relay and the time delays.

Property (Mouseover for details) Value
Input Voltage (V) Min RMS Voltage: 70VAC; Max RMS Voltage: 264VAC
Input AC Line Frequency (Hz) 50/60Hz
Output Type Electromechanical relay
Output Form Isolated SPDT
Output Load Rating (VA) General Purpose: SPDT-NO: 125/240VAC ≅ 30A; SPDT-NC≅15A; Resistive: SPDT-NO≅30A for 125/240VAC 20A for 28VDC; SPDT-NC≅15A for 125/240VAC 10A for 28VDC; Motor Load: SPDT-NO≅1 hp for 125VAC 2hp for 240VAC; SPDT-NC≅1/4hp for 125VAC 1hp for 240VAC
Time Delay Tolerance (%) ≤±5%
Reset Time (ms) ≤150ms
Restart Delay Range 3-300s adjustable
Repeat Accuracy (%) ±0.5% or 20ms whichever is greater
Trip Delay Range 3s
Trip Point Accuracy (%) ±3% of trip point
Undervoltage Sensing Range (V) Peak voltage sensing; 170 to 220VAC
Setpoint vs Ambient Temperature and Operating Voltage (%) ≤±10%
Power Consumption ≤4VA
Pull-in Voltage (V) 105% or trip point voltage
Insulation Resistance ≥100 MΩ
Isolation Voltage (V) ≥1500V RMS input to output
Surge Protection IEEE C62.41-1991 Level A
Circuitry Encapsulated
Life Mechanical - 1 x 106; Electrical - 1 x 105 3 x 104 for 1hp 6 000 for 1/4hp 1hp and 2hp
Termination Type 0.25 in. (6.35mm) male quick connect terminals
Mounting Method Surface mount with one #10 (M5 x 0.8) screw
Operating Temperature -40° to 60°C (-40°F to 140°F)
Storage Temperature (F/C) -40° to 85°C (-40°F to 185°F)
Humidity 95% relative non-condensing
Dimensions 3.00 x 2.00 x 1.50 in. (76.7 x 50.8 x 38.1mm)
Weight (lbs/g) ≅3.9oz (111g)