PLR120A - PLR Series – Voltage Monitor Series

Series: PLR 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 PLR Series provides a cost effective means of preventing 3-phase motor startup during adverse voltage conditions. Proper A-B-C sequence must occur in order for the PLR’s output contacts to energize. In addition, the relay will not energize when an undervoltage or phase loss condition is present. The PLR protects a motor against undervoltage operation. The adjustment knob sets the undervoltage trip point.


Operation
The output relay is energized and the LED glows when all voltages are acceptable and the phase sequence is correct. Undervoltage must be sensed for a continuous dropout delay period before the relay de-energizes. Reset is automatic upon correction of the fault condition. The output relay will not energize if a fault condition is sensed as power is applied.

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Product Literature

For Technical Questions

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

Property (Mouseover for details) Value
Input Voltage (V) 95 - 140 Vac
Input Voltage Maximum (V) 143
Input Type 3-phase delta or WYE with no connection to neutral
Input AC Line Frequency (Hz) 50 / 60
Input Phase Sequence A; B; C
Maximum Output Voltage (V) 250
Output Type Electromechanical relay energized when all voltages are acceptable
Output Form SPDT
Output Load Rating (VA) 5 A resistive @ 240 Vac; 1/4 hp @ 120 Vac
Undervoltage Trip Voltage 85- 130 Vac adjustable
Drop_out Response Time (ms) ≤100; Hysterisis: ≅2%
Pull-in Response Time (ms) ≤400; Hysterisis≅2%
Surge Protection IEEE C62.41-1991 Level B
Termination Type Octal 8-pin plug-in
Mounting Method Plug-in socket rated 600V
Operating Temperature 0° to 55°C (32° to 131°F)
Storage Temperature (F/C) -40° to 85°C (-40° to 185°F)
Dimensions 3.2 H x 2.39 W x 1.78 D in. (81.3 x 60.7 x 45.2 mm)
Weight (lbs/g) 0 Kg
Check Stock Yes

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