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

Series: TVW 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 TVW 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. The output is de-energized during restart delay. Under normal conditions, the output energizes after the restart delay. Undervoltage, overvoltage, and voltage unbalance must be sensed for the complete trip delay period before the output de-energizes. The restart delay begins as soon as the output de-energizes. If the restart delay is completed when a fault is corrected, the output energizes immediately. The output will not energize if a fault is sensed as the input voltage is applied. If the voltage selector is set between two voltage marks (between 220 and 230 V), the LED will flash red rapidly. The TVW provides fault protection at the lower of the two line voltages (220 V). 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. If the voltage selector knob is between settings, it rapidly flashes red.

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 Tolerance (%)Input TypeLifeOutput Load Rating (VA)Output TypeOvervoltage Reset Voltage (%)StockSamplesCompare
TVW5103S5S208 - 240 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; C-0.53-phase delta or WYE with no connection to neutral10 A resistive @ 125 Vac; 5 A @ 250 Vac; 1/4 hp @ 125 VacIsolated SPDT≅-3% of the trip voltageCheckOrder
TVW575S1M208 - 240 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; C-0.53-phase delta or WYE with no connection to neutral10 A resistive @ 125 Vac; 5 A @ 250 Vac; 1/4 hp @ 125 VacIsolated SPDT≅-3% of the trip voltageCheckOrder
TVW6510S0.4S208; 220; 230; 240 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; C-0.53-phase delta or WYE with no connection to neutral10 A resistive @ 125 Vac; 5 A @ 250 Vac; 1/4 hp @ 125 VacIsolated SPDT≅-3% of the trip voltageCheckOrder
TVW9510S0.4S430; 440; 460; 480 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; C-0.53-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≅-3% of the trip voltageCheckOrder
TVW8510S0.4S
Obsolete: 2020 -10-05		380 400 and 415VAC0.25 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)≥2500V RMS input to output terminals95% relative non-condensingABC-0.53-phase delta or wye with no connection to neutralMechanical - 1 x 106; Electrical - 1 x 10510A resistive @ 240VAC; 1/4hp @ 125VAC; 1/3hp @ 250VAC; max voltage 277VACIsolated SPDT≅-3% of the trip voltage
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