Datasheet > 102A3

102A3

更新时间： 2023-12-06 20:00:46

品牌	Logo	应用领域
力特 - LITTELFUSE		/
页数	文件大小	规格书
3页	292K
描述
A unique microcontroller-based voltage and phase-sensing circuit constantly monitors the 3-phase v

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102A3 数据手册

Voltage Monitoring Relays

102A Series

3-Phase Voltage/Phase Monitor

Description

The 102A series is a three-phase, auto-ranging, dual-range voltage monitor that protects 190–600 V ac, 50*/60 Hz motors

regardless of size. This monitor provides a user-selectable nominal voltage setpoint and will automatically select between

the 200 V and 400 V range. A unique microcontroller-based voltage and phase-sensing circuit constantly monitors the

three-phase voltages to detect harmful power line conditions. When a harmful condition is detected, the output relay is

deactivated after a specified trip delay. The output relay reactivates after power line conditions return to acceptable levels.

The 102A monitor includes advanced, single LED diagnostics with five different light patterns that distinguish between

faults and normal conditions. LED indications include normal operation, power-up restart delay, reverse-phase trip,

unbalance/single-phase trip, and high- or low-voltage trip.

*Note: 50 Hz will increase all delay times by 20%.

Features & Beneﬁts

FEATURES

BENEFITS

Constant monitoring of single-phase, low-voltage, high-voltage

(102A-9), voltage unbalance, phase reversal, harmful power

line conditions

Proprietary microcontroller-based circuitry

Automatically senses system voltage between 190–480 V ac. Saves

setup time

Auto-sensing wide voltage range

Advanced LED diagnostics

Quick visual indicator for cause of trip

Prevents nuisance tripping due to rapidly fluctuating power

line conditions

Adjustable trip delay (102A2)

Applications

• Fan motors

• Air conditioners

• Compressors

• Heat, well, and sump pumps

• Small conveyer motors

Littelfuse.com/102A

Speciﬁcations are subject to change without notice.

1 of 3

Revised: 07/13/2023

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