Littelfuse SymCom 250A-MET MotorSaver Protection Relay.

Littelfuse SymCom 250A-MET MotorSaver Protection Relay is a unique microcontroller-based voltage and phase sensing circuit that constantly monitors the three phase voltages to detect harmful power line conditions. When a harmful condition is detected, the MotorSaver’s 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), unless the unit is in the manual reset mode. The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.

The Model 250A-MET has two Form C relays that operate independently of each other. The left-hand relay will energize when voltage conditions are good and de-energize when a fault condition is detected. The right-hand relay will only energize during a reverse-phase condition. No high voltage protection.

This unit was designed for use in applications with fire control panels, but may be used anywhere these features are required.

Protects 3-Phase Motors From:
• Loss of any phase (single-phasing)
• Low voltage
• Voltage unbalance
• Phase reversal

Standard Features:
• Manual - 2-300 seconds variable restart delay
• Advanced LED diagnostics
• Universal range from 190-480VAC 60/50Hz
• Transient protected to meet IC 1000-4-5:1995 Standards and stand up under tougher conditions
• DPDT relay provides two 10A @ 240VAC General Purpose Relays to switch heavier loads

Disclaimer Notice: 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.