Schneider Electric and 6.0A, 3.0A Display, Ammeter Measurements, Accessing Information, 16-EN

Micrologic™ 2.0A, 3.0A, 5.0A, and 6.0A Electronic Trip Units	48049-136-05
Section 2—Ammeter	Rev. 01, 07/2012

Section 2—Ammeter

ENGLISH

Display

A.Alphanumeric screen: Displays ammeter information

B.Bar graph: Displays currents using an LED bar graph

C.Menu button: Used to navigate between the various menus

D.Scroll button: Used to scroll to the next screen in the menus

The default display is the current value of the phase at the highest load.

If no information is displayed, contact the local field office.

NOTE: The ammeter display will function only if the trip unit is powered. The trip unit is powered by the circuit breaker carrying more than 0.20 x In of load current, by being connected to a 24 Vdc external power supply, or by having the Full-Function Test Kit or Hand-Held Test Kit connected and on. Even with external power supplied, current through the circuit breaker must exceed 0.20 x In for the ammeter reading to be accurate to within 1.5%.

Figure 14:	Ammeter
06133245	A
100 %	B
40 %
	C
menu	D

Ammeter Measurements

Micrologic A trip units measure the true RMS value of currents. They provide continuous current measurement from 0.2 to 20 x In with an accuracy of 1.5% (including sensors). No auxiliary source is needed where I > 0.2 x In. The optional external power supply (24 Vdc) makes it possible to display currents where

I < 0.2 x In and to store values of the interrupted current.

A digital LCD screen continuously displays the most heavily loaded phases (Imax) or displays the Ia, Ib, Ic, Ig, and (on 4-pole circuit breakers only) In stored current and setting values by successively pressing the navigation button.

Accessing Information

Three different menus can be accessed:

A.Current measurements

B.Stored peak current measurements

C.Switch settings

In addition, the ammeter can be used to address the circuit breaker communication module (BCM) in circuit breakers which have the optional circuit breaker communication module installed.

Figure 15: Menus

	A–Currents							B–Peak Currents
06133354						06133355
									Max
		A								A
					1.125 x Ir
	100 %		1 x Ir				100 %
					0.8 x Ir
				0.6 x Ir
	40 %		0.4 x Ir				40 %

C–Switch Settings

06133353
Ir=	A

100 %

40 %

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