Circutor RGU-10 - TROUBLESHOOTING OR REASONS FOR TRIPPING; POOR TOROID CONNECTION TRIP; PRE-ALARM TRIP

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RGU-10, RGU-10C
Instruction Manual
The RGU-10/ RG5-10C allow the display and setting of all required parameters to complete the
earth leakage protection adjustment with pre-alarm and communications.
Table 10: Adjustment parameters�
Parameter Units
Programmed pre-alarm trip delay ms / s
Sensitivityofpre-alarmin%I∆N %
Pre-alarm relay contact status
+ (contact 6-5 NO) / nothing (contact 6 - 5 NC)
+ (contact 4-5 NC) / nothing (contact 4 - 5 NO)
Operating frequency
(1)
Hz
Peripheral No
(1)
-
Baud rate
(1)
Bauds
Type of parity
(1)
-
(1)
RGU-10C only.
4.7.- TROUBLESHOOTING OR REASONS FOR TRIPPING
4�7�1�- POOR TOROID CONNECTION TRIP
After a certain time the device will carry out a test to detect the presence of the sensor or asso-
ciated earth leakage transformer.
Also the “ERRt” error message will permanently appear on the RGU-10 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 ensured 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 18: Trip by poor toroid connection�
4�7�2�- PRE-ALARM TRIP
In the event of the defaults current exceeding the programmed pre-alarm threshold, the yellow
LED will come on, the green backlit LCD will show the leakage level and the pre-alarm output
relay will be activated.
In automatic mode (REC) when the pre-alarm situation is removed, normal status is resumed
(LED and signal relay).
In manual mode, the device has to be RESET to unblock the pre-alarm.