HLVA Series - Voltage Monitor

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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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.


Operation
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.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Output
Form
Termination TypeMounting MethodDimensionsWeight (lbs/g)HumidityInput AC Line Frequency (Hz)Insulation ResistanceIsolation Voltage (V)Output Load Rating (VA)Output TypePower ConsumptionPull-in Voltage (V)Repeat Accuracy (%)Stock
HLVA6I23Min RMS Voltage: 70 Vac; Max RMS Voltage: 264 VacIsolated SPDT0.25 in. (6.3 mm) male quick connect terminalsSurface mount with one #10 (M5 x 0.8) screw3 H x 2 W x 1.5 D in. (76.7 x 50.8 x 38.1 mm)0 Kg95% non-condensing50 / 60≥100≥1500 Vrms input to outputGeneral Purpose: SPDT-NO: 125/240 Vac 30 A; SPDT-NC 15 A; Resistive: SPDT-NO: 125/240 Vac 30 A; 28 Vdc 20 A; SPDT-NC: 125/240 Vac 15 A; 28 Vdc 10 A; Motor Load: SPDT-NO: 125 Vac 1 hp; 240 Vac 2 hp; SPDT-NC: 125 Vac 1/4 hp; 240 Vac 1 hpElectromechanical relay≤4 VA105% or trip point voltage±0.5% or 20 ms whichever is greaterCheck
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