202 - 202 Series – Three-Phase Voltage Monitor Relay Series

Series: 202 Series – Three-Phase Voltage Monitor Relay
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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 202-200-SP voltage monitor is designed to protect single-phase motors regardless of size. It can be used with 190V-240VAC, 50/60Hz motors to prevent damage caused by incoming power problems.

A unique microcontroller-based voltage-sensing circuit constantly monitors the voltage to detect harmful power line conditions. When a harmful condition is detected, the relay’s output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level and a specified amount of time has elapsed (restart delay). The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.

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Product Literature


Property (Mouseover for details) Value
Input Voltage (V) 190 - 480 Vac
Input Tolerance (%) ±10%
Maximum Input Power 5
Input AC Line Frequency (Hz) 50 / 60 (50 will increase all delay timers by 20%)
Input Phase Sequence A; B; C
Output Form SPDT
Output Load Rating (VA) Pilot Duty: 480 VA @ 240 Vac; General Purpose: 10 A @ 240 Vac
Restart Delay Range Manual; 2 - 300 s adjustable
Repeat Accuracy (%) ±0.5%
Trip Delay Range Under/Over Voltage: 4 s; Unbalance/Phase faults: 2 s
Trip Point Accuracy (%) ±1%
Overvoltage Trip Voltage (%) 110%
Overvoltage Reset Voltage (%) 107%
Undervoltage Trip Voltage 90%
Undervoltage Reset Voltage (%) 93%
Voltage Unbalance Trip Point (%) 6%
Voltage Unbalance Reset (%) 4.50%
Dielectric Breakdown ≥1960
Termination Type 0.25 in male quick connect
Mounting Method 1/4 in socket head cap screw (customer supplied)
Operating Temperature -40° to 70°C (-40° to 158°F)
Humidity 95% non-condensing
Dimensions 2.5 H x 2.5 W x 1.4 D in. (63.5 x 63.5 x 35.6 mm)
Weight (lbs/g) 0 Lb
Check Stock Yes

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