Bender RCMA420-D-2 B74043002 Hoja De Datos

Function

11

ice.

If faults occur only temporarily, but recurrently, in the system being moni-
tored, with the fault memory M deactivated, the alarm relays would switch 
synchronously to the error status.
RL in the out menu can be used to limit the number of these changeover proc-
esses. As soon as the preset number of switching cycles is exceeded, the fault 
memory will come on and an activated alarm remains stored.

The alarm categories device error, residual current I

Δn1

, residual current I

Δn2

 or 

alarm by device test can be assigned to the alarm relays via the "out" menu.

The times t, t

on

 and t

off, 

described below, delay the output of alarms via LEDs 

and relays.

After connection to the supply voltage, the alarm indication is delayed by the 
preset time t (0...10 s).

If the residual current increases above or falls below the response value the re-
sponse time t

an

 expires. After the expiry of the response time an alarm is sig-

nalled. A set response delay t

on1/2

 (0...10 s) adds up to the device-related 

operating time t

ae

 and delays alarm signalling (total delay time t

an

 = t

ae

 + t

on

).

If the residual current fault changes from a value above the response value to 
a value below the response value, an alarm will not be signalled.

When no alarm exists after deactivating the fault memory, the alarm LEDs go 
out and the alarm relays switch back to their initial position. After activating 
the delay on release (0...99 s), the alarm state is continuously maintained for 
the selected period.