TVM Series – Voltage Monitor Series - Littelfuse TVM Voltage Monitoring Relays Provide Superior Protection

Series: TVM 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 TVM series is a three-phase voltage monitor that provides protection for motors and other sensitive loads. It continuously measures the voltage of each of the three phases using a microcomputer circuit design that senses under and overvoltage, voltage unbalance, phase loss, and phase reversal. Protection is provided even when regenerated voltages are present. This monitor includes a trip delay to prevent nuisance tripping and a restart delay to prevent short cycling after a momentary power outage.

Operation
Upon application of line voltage, the restart delay begins, and the output relay is de-energized. Under normal conditions, the output energizes after restart delay. Undervoltage, overvoltage, and voltage unbalance must be sensed for a continuous trip delay period before the output is de-energized. The output will not de-energize if a fault is corrected during the trip delay. The restart delay begins as soon as the output relay de-energizes. If the restart delay is completed when the fault is corrected, the output relay will energize immediately. The output relay will not energize if a fault or phase reversal is sensed as three-phase input voltage is applied. Reset is automatic upon correction of a fault.

LED Operation
The LED flashes green during the restart delay, then glows green when the output energizes. It flashes red during the trip delay, then glows red when the output de-energizes. It flashes red/green if phase reversal is sensed.

Features

  • Proprietary microcontroller-based circuitry
  • Compact design measures 2 in. (50.8 mm) square
  • LED indication
  • Encapsulated

Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)		Termination TypeMounting MethodDimensionsWeight (lbs/g)Dielectric BreakdownHumidityInput AC Line Frequency (Hz)Input Phase SequenceInput TypeLifeOutput Load Rating (VA)Output TypeOvervoltage Reset Voltage (%)Overvoltage Trip Voltage (%)StockSamplesCompare
TVM460A41S5M460 Vac0.25 in. (6.3 mm) male quick connect terminalsSurface mount with one #8 (M5 x 0.8) screw2 H x 2 W x 1.25 D in. (50.8 x 50.8 x 31.8 mm)0 Kg≥2500 input to output terminals95% non-condensing50 - 100A; B; C3-phase delta or WYE with no connection to neutral10 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/3 hp @ 250 Vac; 277 Vac maxIsolated SPDT relay contacts≅-3% of the trip voltage109 - 113% of the adjusted line voltageCheckOrder
TVM460A75S2M460 Vac0.25 in. (6.3 mm) male quick connect terminalsSurface mount with one #8 (M5 x 0.8) screw2 H x 2 W x 1.25 D in. (50.8 x 50.8 x 31.8 mm)0 Kg≥2500 input to output terminals95% non-condensing50 - 100A; B; C3-phase delta or WYE with no connection to neutral10 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/3 hp @ 250 Vac; 277 Vac maxIsolated SPDT relay contacts≅-3% of the trip voltage109 - 113% of the adjusted line voltageCheckOrder
TVM480A100.5S3S480 Vac0.25 in. (6.3 mm) male quick connect terminalsSurface mount with one #8 (M5 x 0.8) screw2 H x 2 W x 1.25 D in. (50.8 x 50.8 x 31.8 mm)0 Kg≥2500 input to output terminals95% non-condensing50 - 100A; B; C3-phase delta or WYE with no connection to neutral10 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/3 hp @ 250 Vac; 277 Vac maxIsolated SPDT relay contacts≅-3% of the trip voltage109 - 113% of the adjusted line voltageCheckOrder
TVM480A45S5S480 Vac0.25 in. (6.3 mm) male quick connect terminalsSurface mount with one #8 (M5 x 0.8) screw2 H x 2 W x 1.25 D in. (50.8 x 50.8 x 31.8 mm)0 Kg≥2500 input to output terminals95% non-condensing50 - 100A; B; C3-phase delta or WYE with no connection to neutral10 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/3 hp @ 250 Vac; 277 Vac maxIsolated SPDT relay contacts≅-3% of the trip voltage109 - 113% of the adjusted line voltageCheckOrder
TVM208A100.5S3S
Obsolete: 2020 -10-07		208 Vac0.25 in. (6.3 mm) male quick connect terminalsSurface mount with one #8 (M5 x 0.8) screw2 H x 2 W x 1.25 D in. (50.8 x 50.8 x 31.8 mm)0 Kg≥1500 input to output terminals95% non-condensing50 - 100A; B; C3-phase delta or WYE with no connection to neutral10 A resistive @ 125 Vac; 5 A @ 250 Vac; 1/4 hp @ 125 VacIsolated SPDT relay contacts≅-3% of the trip voltage109 - 113% of the adjusted line voltageCheck
TVM230A101S1S
Obsolete: 2020 -10-05		230VAC0.25 in. (6.35mm) male quick connect terminalsSuface mount with one #8 (M5 x 0.8) screw2.00 x 2.00 x 1.25 in. (50.8 x 50.8 x 31.8mm)≅2.8oz (79g)≥1500V RMS input to output terminals95% relative non-condensingABC3-phase delta or wye with no connection to neutralMechanical - 1 x 106; Electrical - 1 x 10510A resistive @ 125VAC; 5A @ 250VAC; 1/4hp @ 125VACIsolated SPDT relay contacts≅-3% of the trip voltage109 - 113% of the adjusted line voltage
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