Circutor RGU-10 B RCM, Instruction Manual

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19
Instruction Manual
RGU-10 B, RGU-10 B RCM
4�7�- TROUBLESHOOTING OR REASONS FOR TRIPPING
4�7�1�- POOR TOROID CONNECTION ALARM
After a certain time the device will carry out a test to detect the presence of the sensor or associated
earth leakage transformer.
Also the “
ERRt”
error message will permanently appear on the
RGU-10 B
display.
A short-circuit in the transformer secondary will also be detected as an error.
When this error is detected, the correct connection with the earth leakage transformer has to be en-
sured and a
RESET
made to re-establish proper working. If the transformer is detected again, normal
status is returned and the error message disappears.
Figure 12: Alarm by poor toroid connection�
4�7�2�- PREALARM TRIP
In the event of the defaults current exceeding the programmed prealarm threshold, the yellow LED
will come on, the green backlit LCD will show the leakage level and the prealarm output relay will be
activated.
In automatic mode ( REC ) when the prealarm situation is removed, normal status is resumed (LED and
signal relay).
In manual mode, the device has to be
RESET
to unblock the prealarm.
4�7�3�- TRIP BY LEAKAGE CURRENT
When the leakage current exceeds the value programmed in the trip relay, the red and yellow LEDs
remain on and the LCD backlit in red with the message ALARM. To reconnect press
RESET
to return to
the initial status.
4�7�4�- REMOTE TRIP
When a trip is forced (input terminals 1-2 , by applying 230 Vac ) the device is tripped and disabled and
an “
EXT
” message is shown on the display in red and also the LED is on. It has to remain permanently
in this situation until the change in status no longer exists. It is not possible to manually reset or reset
using communications.