Datasheet

TDB404006en / Main catalogue part 4 – Residual current monitors, Residual current monitoring systems / 07.2010 41

4.2

Residual current monitor RCMA420

1 - Supply voltage U

see ordering information

(6 A fuse recommended)

2 - Connector for the external W20AB…W60AB series measuring

current transformer

3 - Alarm relay K1: I

Δn1

(prewarning)

4 - Alarm relay K2: alarm I

Δn2

(alarm)

5 - Combined test and reset button "T/R"

short-time pressing (< 1.5 s) = RESET

long-time pressing (> 1.5 s) = TEST

Do not route the PE conductor through the measuring current

transformer!

Operating and display elements Wiring diagram

1 - Power On LED "ON" (green); lights when supply voltage is applied

and flashes in the event of system fault alarm respectively in the

event of CT malfunction.

2 - Alarm LED "AL1" (yellow), prewarning; lights when the set re-

sponse value I

Δn1

is exceeded or flashes in the event of system

fault alarm respectively in the event of CT malfunction

3 - Alarm LED "AL2" (yellow), alarm; lights when the set response

value I

Δn2

is exceeded or flashes in the event of system fault

alarm respectively in the event of CT malfunction

4 - Multi functional LC display

5 - Test button "T": to call up the self test.

Arrow up button: parameter change, to move up in the menu

6 - Reset button "R": to delete saved alarms.

Down button: parameter change, to move down in the menu

7 - "MENU" button: to call up the menu system.

Enter button: to confirm parameter change.

Press ESC: press the button > 1.5 seconds.

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