Function
10
TGH1410en/03.2012
tion can be tested using the test button T. The parameterization of the device
can be carried out via the LC display and the function 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 Additional cascaded measuring current transformer
For applications where residual currents higher than 10 A occur, a second ex-
ternal transformer can be cascaded. The transformer's transmission ratio can
be adapted using the correction factor n
RCM
in the SEt menu. Refer to page 15
and page 30.
3.2.3 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.
3.2.4 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.
3.2.5 Manual self test
After pressing the test button for > 1.5 s, the device carries out a self test.
During 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.
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