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AC Current

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Selection Guide

M200-A1U Single phase under current
M200-A1O Single phase over current
M200-A1C Single phase combined current
M200-A3U 3 phase under current
M200-A3O 3 phase over current

Typical Applications

The M200 AC current relays provide current monitoring and protection in both single and 3 phase systems. Used in applications such as motor protection, load detection and generator control. Under, over and combined under/over units are available. The relay operates when the adjustable trip point is reached. An externally adjustable time delay is provided to prevent nuisance tripping. As is common with all the M200 relays, on over relays the unit energises when the input signal exceeds the trip point. On under units the relay de-energises when the input signal goes beyond the trip point. A red LED indicates the condition of the power supply.

Technical Specification

INPUT  
Rated value In 1A or 5A from C.T. 0.2 to 10 Amp direct connected
Frequency 50/60/400Hz
Burden <0.5VA per phase
Overload 2 x In continuous 10 x In for 3 seconds
SETPOINT  
Range Over Adjustable 40% to 120% In
Range Under Adjustable 0% to 80% In
Repeatability Better than 0.5% of span
Differential Fixed 5%
Time Delay Adjustable 200mS to 10 seconds
AUXILIARY  
AC Voltage 115 / 230 / 400V
  (±25%/45-65Hz/<2VA)
DC Voltage 24 volt(±20% / galvanically isolated)<3 watt
WEIGHT&CASE  
Single Units Approx 0.4kg 55mm case
Combined Units Approx 0.6kg 100mm case

Ordering Information

Product Code Input Freq Aux
M200-A30 5A 50Hz 230V

Options

1 Adjustable time delay max 30 seconds
2 AC Auxiliary in range 57.7 to 480 volts
3 Calibration at nominal Hz
4 Calibration at temperature other than 23șC.

Connection Diagrams

Data Sheet in PDF Format Available here

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