Cooper Lighting M-LIB3 -

M-LIB3 Low Impedance Bus Differential Relay

6.11 TEST

Besides the normal "WATCHDOG" and "POWERFAIL" functions, a comprehensive program of self-test and

self-diagnostic provides :

q Diagnostic and functional test with checking of program routines and memory's content, run every time the

aux. power is switched-on: the display shows the type of relay and its version number and then switches

over to the default display.

q Dynamic functional test is run during normal operation every 10 minutes.

q Complete test activated by the keyboard or via the communication bus either with or without tripping of the

output relays.

6.12 KEYBOARD AND DISPLAY OPERATION

All controls can be operated from relay's front or via serial communication bus.

The keyboard includes five hand operable buttons (MODE) - (SELECT) - (+) - (-) - (ENTER/RESET)

plus one indirect operable key (PROG) (see synoptic table a fig.1):

a) -White key MODE :when operated it enters one of the following operation modes

indicated on the display :

MEASURES =Reading of all the parameters measured and of those recorded

in the memory

SET DISP =Reading of the settings and of the configuration of the output

relays as programmed.

PROG =Access to the programming of the settings and of the

configuration of output relays

TEST PROG =Access to the manual test routines.

b) -Green key SELECT :When operated it selects one of the menus available in the

actual operation MODE

c) -Red key “ + ” AND “ - “:When operated they allow to scroll the different information

available in the menu entered by the key SELECT and to

increase-decrease the settings.

d) -Yellow key

ENTER/RESET

:It allows:

- the validation of the programmed setting

- the actuation of test programs

- the reset of the default display indication

- the reset of signal LEDs.

e) -Indirect key •:Enables access to the programming.

ENTER/RESET

MODE SELECT +

PROG.