Datasheet > 201A-9

201A-9

更新时间： 2024-11-26 14:54:31

品牌	Logo	应用领域
力特 - LITTELFUSE		/
页数	文件大小	规格书
4页	292K
描述
This unique microcontroller-based voltage and phase-sensing device constantly monitors the 3-phase

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Voltage Monitoring Relays

201A Series

3-Phase Voltage/Phase Monitor

Description

The 201A series is a three-phase, auto-ranging, dual-range voltage monitor that protects 190–480 V ac, 50*/60 Hz motors

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

between the 200 V and 400 V range. It includes advanced, single LED diagnostics where color and light patterns distinguish

between faults and normal conditions. This unique microcontroller-based voltage and phase-sensing unit 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 for a specified restart delay time.

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

Features & Beneﬁts

FEATURES

BENEFITS

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

phase reversal, power line conditions – high-voltage monitoring

is optional

Proprietary microcontroller-based circuitry

Automatically senses system voltage between 190–480 V ac.

Saves setup time

Auto-sensing wide voltage range

LED indications include: normal operation, power-up restart delay,

reverse-phase trip, unbalance/single-phase trip, high/low voltage trip

Advanced LED diagnostics

Compact design for 8-pin; DIN-rail or surface mount

Allows flexibility in panel installation

Applications

• Fan motors

• Air conditioners

• Compressors

• Heat, well, and sump pumps

• Small conveyer motors

Littelfuse.com/201A

Speciﬁcations are subject to change without notice.

1 of 4

Revised: 07/06/2023

12 3 4

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201A-AU	LITTELFUSE	获取价格	This unique microcontroller-based voltage and phase-sensing device constantly monitors the
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20-1B06IPB010RC02-L815A49	VINCOTECH	获取价格	Optimised collector emitter saturation voltage and forward voltage for low conduction loss
20-1B06IPB010RC03-P955A65	VINCOTECH	获取价格	Optimised collector emitter saturation voltage and forward voltage for low conduction loss
20-1B06IPB010RC-P955A4	VINCOTECH	获取价格	Optimised collector emitter saturation voltage and forward voltage for low conduction loss

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