Littelfuse HLVA6I23, HLVA Series, Voltage Sensing AC 100 ~ 240VAC, SPDT (1 Form C)
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The HLVA6I23 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.
Features
. 30A, SPDT, NO output contacts
. 100 to 240VAC input voltage
. 70 to 220VAC adjustable undervoltage trip point in 2 ranges
. Restart delays from 3 - 300s
. Trip delay 1 - 20s fixed
. Isolated or non-isolated relay contacts
Specifications
| Input | |
| Min & Max RMS Voltage | 70 to 264VAC |
| AC Line Frequency | 50/60 Hz |
| Power Consumption | AC ≤ 4VA |
| Undervoltage Sensing | |
| Type | Peak voltage sensing |
| Ranges |
(4) 70 to 120VAC (6) 170 to 220VAC |
| Pull-In Voltage | 105% or trip point voltage |
| Trip Point Accuracy | ± 3% of trip point |
| Time Delay | |
| Restart Delays | 3 - 300s adjustable |
| Trip Delay | 1 - 20s fixed in 1s increments |
| Repeat Accuracy | ±0.5% or 20ms, whichever is greater |
| Tolerance (Factory Calibration) | ±5% |
| Reset Time | ≤ 150ms |
| Time Delay vs. Temp. & Voltage | ≤ ±10% |
| Output | |
| Type | Electromechanical relay |
| Form | SPDT |
| Ratings | SPDT-NO SPDT-NC |
| General Purpose | 125/240VAC 30A 15A |
| Resistive |
125/240VAC 30A 15A 28VDC 20A 10A |
| Motor Load |
125VAC 1 hp* 1/4 hp** 240VAC 2 hp** 1 hp** |
| Life |
Mechanical - 1 x 10⁶ Electrical - 1 x 10⁵, *3 x10⁴, **6,000 |
| Protection | |
| Surge | IEEE C62.41-1991 Level A |
| Circuitry | Encapsulated |
| Isolation Voltage | ≥ 1500V RMS input to output; isolated units |
| Insulation Resistance | ≥ 100 MΩ |
| Mechanical | |
| Mounting | Surface mount with one #10 (M5 x 0.8) screw |
| Dimensions |
H 76.7 mm (3”) W 51.3 mm (2”) D 38.1 mm (1.5”) |
| Termination | 0.25 in. (6.35 mm) male quick connects |
| Environmental | |
| Operating/Storage Temperature | -40° to 60°C / -40° to 85°C |
| Humidity | 95% relative, non-condensing |
| Weight | ≅ 3.9 oz (111 g) |