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6 - 31
Siemens AG ⋅ January 1999
Before the line is energized, all secondary testing
equipment must be removed. The preparations for
putting the device into service as described in section
5.2 must be completed. The line must be energized
for the primary tests.
Warning
Primary tests may only be performed
by qualified personnel who are familiar
with the commissioning of protection
systems, operation of the network and
the safety rules and regulations (switĆ
ching, earthing, etc.).
Rapid commissioning without instrumentation is posĆ
sible using the integrated measuring functions and
commissioning tools in the device.
The line is initially open and earthed at both ends at
the beginning of the measurements for the commisĆ
sioning.
Initially, the differential protection is switched to
(addr. 10DIFPRO)or the trip command is interĆ
rupted; the pilot wire monitoring (if available) is switĆ
ched (addr. 11PW.MON). The function tripping by
remote station (addr. 13OFF.R.) is also initially switĆ
ched off.
The differential protection can generally be activated
in two ways.
D Protective function The protective funcĆ
tion operates and outputs indications. The trip
command is blocked however.
D Protective function : The protective function
operates and outputs indications. The trip comĆ
mand goes to the trip relay which has been marsĆ
halled with the protective function according to
section 5.5.5. No tripping takes place if the protecĆ
tive function is not marshalled to any trip relay.
6.7.1 Checking the switching states
of the binary inputs/outputs
The differential protection 7SD600 contains a test
program with which the switching states of all binary
inputs and outputs can be polled and shown in the
display.
Tests are available from block 40. The ADDITIONAL
FUNCTIONS block can be reached from the initial poĆ
sition of a device in service by pressing the B key
three times. The DATE/TIME block can be reached by
changing to the next level with ". The Tests block
can be reached with B.
When operating via a PC and the operating program
DIGSI
R
the test addresses are identified by a four-diĆ
git address number. This is indicated in square brakĆ
kets with the explanation text in the following examĆ
ples.
Y
T E S T –
I N A C C
"
[4000]
Start of the block "Tests"
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