Function
10
TGH1442en/06.2012
remain in the alarm state and the LEDs light until the reset button is pressed
or until the supply voltage is interrupted. The device function can be tested
using the test button. The parameterisation of the device can be carried out
via the LC display and the control keys integrated in the front plate and can be
password-protected.
3.2.1 Connection monitoring
The CT connections are continuously monitored. In the event of a fault, the
alarm relays K1 / K2 switch without delay, the alarm LEDs AL1 / AL2 / ON flash
(Error Code E.01). After eliminating the fault, the alarm relays automatically re-
turn to their initial position, provided that the fault memory M is deactivated.
With the fault memory activated, K1/K2 return to their initial position by press-
ing the reset button R. A second cascaded measuring current transformer will
not be monitored.
3.2.2 Fast response value query
With the display in standard mode, the currently measured response values
I
Δn1
and I
Δn2
can be queried pressing the Up and Down keys ( < 1.5 s). Switch-
over to the Menu mode is not required. If you want to exit the fast response
value query, press the enter key.
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 func-
tional faults will be detected and appear in form of an error code on the dis-
play. The alarm relays are not checked during this test.
3.2.4 Manual self test
After pressing the test button for > 1.5 s, the device carries out a self test. Dur-
ing this test, internal functional faults are detected and will be displayed in
form of an error code. The alarm relays are not checked during this test.
While the test button T is pressed and held down, all device-related display el-
ements appear on the display.
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