460-400HZ - 460 Series – Three-Phase Voltage Monitor Series

Series: 460 Series – Three-Phase 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 460 is a 3-phase voltage monitor that protects 190-480VAC or 475-600V, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage set point and the voltage monitor automatically senses line voltage.

This unique microcontroller-based voltage and phase-sensing device constantly monitors the 3-phase voltages to detect harmful power line conditions such as low, high, and unbalanced voltage, loss of any phase, and phase reversal. When a harmful condition is detected, the 460 output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level for a specified amount of time (restart delay). The trip and restart delays prevent nuisance tripping due to rapidly fluctuating power line conditions.

All 460 models feature adjustable 1-30 second trip delay, 1-500 second restart delay, 2-8% voltage unbalance trip point, and one form C contact except where noted.

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Product Literature

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

Property (Mouseover for details) Value
Input Voltage (V) 190 - 480 Vac
Maximum Input Power 6
Input AC Line Frequency (Hz) 400
Output Form Form C
Output Load Rating (VA) Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac
Restart Delay Range 1 - 500 s adjustable
Trip Delay Range Under/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults (>25%UB): 1 s fixed
Trip Point Accuracy (%) ±1%
Overvoltage Trip Voltage (%) 110%
Overvoltage Reset Voltage (%) 107%
Undervoltage Trip Voltage 90%
Undervoltage Reset Voltage (%) 93%
Voltage Unbalance Trip Point (%) 2 - 8% adjustable
Voltage Unbalance Reset (%) Trip setting minus 1% (5 - 8%); Trip setting minute 0.5% (2 - 4%)
Protection Class IP20; NEMA 1 (finger safe)
Termination Type Torque: 6 in-lbs; Wire: Stranded or solid 12 - 20 AWG one per terminal
Mounting Method 35mm DIN rail or Surface Mount (#6 or #8 screws)
Operating Temperature -20° to 70°C (-4° to 158°F)
Storage Temperature (F/C) -40° to 80°C (-40° to 176°F)
Humidity 10 - 95% non-condensing per IEC 68-2-3
Dimensions 3.5 H x 2.08 W x 2.35 D in. (88.9 x 52.9 x 59.7 mm)
Weight (lbs/g) 0 Kg
Check Stock Yes

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