Function
16
RCMA423-DM_D00064_03_M_XXEN/06.2017
The device function can be tested using the test button T. Parameters are as-
signed to the device via the LCD and the control buttons on the front panel;
this function can be password-protected.
3.2.1 Connection monitoring
The connections to the measuring current transformer are constantly monito-
red. In the event of a fault, the alarm LEDs AL1/AL2/ON flash (Error Code E.01).
3.2.2 Quick query of the response values
When the display is in standard mode, the current response values I
n1
and
I
n2
can be queried by using the arrow-up and arrow-down button (< 1.5 s).
Switching over to the menu mode is not necessary. Press the enter button to
exit the quick query.
3.2.3 Automatic self test
The device automatically carries out a self test after connecting to the system
to be monitored and later every 24 hours. During the self test internal functio-
nal faults will be detected and appear in form of an error code on the display.
3.2.4 Manual self test
While holding down the test button T, all device-relevant display elements ap-
pear on the display.
The device runs a self test when the test button is pressed > 1.5 s. Any internal
malfunctions detected during this test are shown on the display as error
codes.
In addition, a test current ins injected via connection T of the measuring cur-
rent transformer. It exceeds the response value set on the RCMA. As long as no
malfunctions are detected during the self test, all three LEDs stay lit. After the
test has been completed successfully, the yellow LEDs go out. If the test cur-
rent does not exceed the set response value, the yellow LEDs flash and the er-
ror code E.02 appears in the display.
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