Siemens siprotec 7SA6 User Manual page 526

Control During Operation
From the
Device Front
7-42
&%7(67 UXQQLQJ
&%767VWRS )/7
&%767VWRS 23(1
&%767VWRS 127U
&%767VWRS &/26
&%767 2.
The following diagram shows the test sequence in principal:
TRIP
CLOSE
T TRIP CMD.MIN.
Figure 7-41 TRIP-CLOSE test cycle
The initiation of the test is done via the keypad and display on the front of the device
or with a PC running DIGSI
diagnostics) is required.
DANGER!
A successful initiation of a test cycle may cause closure of the circuit breaker if
an external reclose device is available!
With the device ready for operation, first press the
Select the 7HVW'LDJQRVH option using the
',$*126( with the
key, the &% WHVW (21) is now marked and the test program is selected
With the
with the key.
A prompt for entry of password No. 4 (test and diagnostics) appears. After entry of the
password and confirmation with
the default response "Yes" (Figure 7-42). This must be confirmed by pressing the
key if the circuit breaker is definitely closed.
If circuit breaker auxiliary contacts are connected and marshalled, the device rejects
the test cycle when the auxiliary contacts indicate that the circuit breaker is not closed,
Circuit breaker test in progress
Circuit breaker test cannot be started as a system fault is
present
Circuit breaker test cannot be started as the circuit breaker
is not closed
Circuit breaker test cannot be started as the circuit breaker
is not ready
Circuit breaker test has been terminated as the CB is still
closed (prior to CB test reclosure)
Circuit breaker test cycle has been completed successfully
T PAUSE TEST
®
4. Entry of the password (password No. 4 for test and
key.
, the query "%UHDNHU FORVHG"" appears, with
ENTER
t
T CLS. CMD MAX.
key. The 0$,1 0(18 appears.
MENU
key and enter the sub-menu 7(67
C53000-G1176-C133-1
ENTER
7SA6 Manual