202 SERIES

2019-05-23
The 202 Series is a 3-phase, auto-ranging, dual-range voltage

monitor that protects 190-480VAC, 50*/60Hz motors regardless

of size. The 202-RP (and the 202-575-RP for 475-600VAC)

monitors the phase rotation of 3-phase systems and trips on

reverse-phase only. Critical applications include fan motors,

scroll compressors, grinders, conveyor systems, elevators and

escalators. Both products provide a user selectable nominal

voltage setpoint and automatically select between the 200V and

400V range.

This unique microcontroller-based voltage and phase-sensing

device constantly monitors the 3-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 acceptable levels for a specified amount of

restart delay time (or a manual reset). The 202 Series includes

advanced single LED diagnostics. Five different light patterns

distinguish between faults and normal conditions. The status

light turns green and the relay is activated when rotation is

correct.

Littelfuse

202202-RP202-575-RP

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Part#

Voltage Monitoring Relays3-Phase Voltage/Phase Monitor

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Datasheet

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UL 、 UL(E68520) 、 UL508 、 UR

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Please see the document for details

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English Chinese Chinese and English Japanese

2016/11/23

Rev: 1-A-062116

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