TVM480A100.5S3S - TVM Series

Series: TVM Questions? Contact Littelfuse Support
Littelfuse Voltage Monitoring Relays
The TVM series provides protection for motors and other sensitive loads. ontinuously 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. Includes a trip delay to prevent nuisance tripping and a restart delay to prevent short cycling after a momentary power outage.

Upon application of line voltage, the restart delay begins. The output relay is de-energized during restart delay. Under normal conditions, the output energizes after restart delay. Undervoltage, overvoltage, and voltage unbalance must be sensed for 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 3-phase input voltage is applied.
Reset: Reset is automatic upon correction of a fault.

Property (Mouseover for details) Value
Input Voltage (V) 480VAC
Input Type 3-phase delta or wye with no connection to neutral
Input AC Line Frequency (Hz) 50-100Hz
Input Phase Sequence ABC
Output Type Isolated SPDT relay contacts
Output Load Rating (VA) 10A resistive @ 240VAC; 1/4hp @ 125VAC; 1/3hp @ 250VAC; max voltage 277VAC
Reset Time (ms) Automatic
Response Time (ms) Phase loss: ≤200ms; Phase reversal: ≤200ms
Restart Delay Range 3s fixed
Restart Delay Tolerance (%) ±15% or ±0.2s whichever is greater
Trip Delay Range 5s fixed
Trip Delay Tolerance (%) ±15% or ±0.1s whichever is greater
Trip Delay vs Temperature Trip variation: ≤±2%
Overvoltage Trip Voltage (%) 109 - 113% of the adjusted line voltage
Overvoltage Reset Voltage (%) ≅-3% of the trip voltage
Undervoltage Trip Voltage 88-92% of the adjusted line voltage
Undervoltage Reset Voltage (%) ≅+3% of the trip voltage
Voltage Unbalance Trip Point (%) 10% fixed
Voltage Unbalance Reset (%) ≅-0.7% unbalance
Phase Loss ≥25% unbalance
Power Consumption ≅3W
Dielectric Breakdown ≥2500V RMS input to output terminals
Surge Protection IEEE C62.41-1991 Level B
Type of Detection Voltage detection with delayed trip and automatic reset
Life Mechanical - 1 x 106; Electrical - 1 x 105
Termination Type 0.25 in. (6.35mm) male quick connect terminals
Mounting Method Suface mount with one #8 (M5 x 0.8) screw
Operating Temperature -40° to 55°C (-40°F to 131°F)
Storage Temperature (F/C) -40° to 85°C (-40°F to 185°F)
Humidity 95% relative non-condensing
Dimensions 2.00 x 2.00 x 1.25 in. (50.8 x 50.8 x 31.8mm)
Weight (lbs/g) ≅2.8oz (79g)