Bender RCMA420-D-2 B74043002 Scheda Tecnica

Operation and setting

21

An example is given here on how to change the alarm response value I1 (I

Δn1

). 

It is presumed that the option overcurrent (HI) has been selected in the SEt/I 
12 menu (factory setting). Proceed as follows:

1. Press the MENU/Enter key for more than 1.5 seconds. The flashing short 

symbol AL appears on the display.

2. Confirm with Enter. The parameter response value > I2 flashes, in addi-

tion the associated overcurrent value > 30 mA appears.

3. Use the Down key to select the parameter response value I1. The 

parameter > I1 flashes, in addition the associated percentage value for 
prewarning 50 % of I2 appears.

4. Confirm with Enter. The current value for prewarning appears on the 

flashing display.

5. Use the Up or Down key to set the appropriate prewarning value. Con-

firm with Enter.  I1 flashes.

6. You can exit the menu by:

–    pressing the Enter key for more than 1.5 seconds to reach the next 

higher level or

–    selecting the menu item ESC and confirming with Enter to reach the 

next higher level.

The operating mode can be changed in the SEt/I 12 menu using the parame-
ters HI, Lo and In. By default, overcurrent operation (HI) is set. Refer to page 27 
for a detailed description on how to change over to the window mode.