Bender LINETRAXX RCM420 - Advanced Functionality; Window discriminator mode; Password protection and factory settings; History memory and test;reset button

Function
If the residual current increases above or falls below the response value the response time t
an
expires. After the
expiry of the response time an alarm is signalled. 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.
Delay on release t
off
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.
2.3.9 Residual current monitoring in window discriminator mode
Change the measuring principle by selecting the window mode (SEt / In). In the window discriminator mode,
the threshold values I1 and I2 represent the upper and the lower value. If the measured value is not within this
area, an alarm is initiated by the device.
2.3.10 Password protection (on, OFF)
When the password protection is activated (on), settings are only possible after entering the correct password
(0…999).
2.3.11 Factory setting FAC
After activating the factory setting, all settings previously changed are reset to delivery status.
2.3.12 Erasable history memory
The first alarm value that occurs will be saved in this memory. The memory can be cleared via the menu HiS.
2.3.13 External, combined test/reset button T/R
Reset = Pressing the external button < 1.5 s
Test = Pressing the external button > 1.5 s
2.3.14 Fault memory
The fault memory can be activated, deactivated or set to continuous mode (con). If the fault memory is set to
‘con’ mode, the alarm parameters remain stored even on failure of the supply voltage. Stored alarms can be
reset by means of the reset button R.
2.3.15 Additional cascaded measuring current transformer
Für Anwendungen, in denen Differenzströme von mehr als 10 A auftreten, kann ein zweiter externer Wandler
kaskadiert werden. Dessen Übersetzungsverhältnis kann im Menü SEt mit dem Korrekturfaktor n
RCM
angepasst
werden.
For applications where residual currents higher than 10 A occur, a second external transformer can be
cascaded. The transformer's transmission ratio can be adapted using the correction factor n
RCM
in the SEt
menu.
10 RCM420_D00057_06_M_XXEN/12.2023