Operating instructions7SV512
V1
99C53000---G1176---C91
6.6 Testing and commissioning
6.6.1 General
Prerequisite for commissioning is the completion of
the preparation procedures detailed in Chapter 5.
Hazardous voltages are present in this
electrical equipment during operation.
Non-observance ofthe safety rules canre-
sult in severe personal injury or property
damage.
Only qualified personnel shall workon and
around this equipment after becoming
thoroughly familiar with all warnings and
safety notices ofthis manual aswell aswith
the applicable safety regulations.
Particular attention must be drawn to the
following:
" The earthing screw of the device must
be connected solidly to the protective
earth conductor before any other con-
nection is made.
" Hazardous voltages canbe present on
all circuits and components con-
nected to the supply voltage or to the
measuring and test quantities.
" Hazardous voltages can be present in
the device even after disconnection of
the supply voltage (storage capaci-
tors!).
" The limit values given in the Technical
data (Section3.1)must not beexceed-
ed at all, not even during testing and
commissioning.
!
Warning
When testing the unitwith asecondary injection test
set, it must be ensured that no other measured val-
ues are connected and that the tripping leads to the
circuit breaker trip-coils have been interrupted.
Secondary connections of the current
transformers must be short-circuited
before the current leads to the relay are
interrupted!
If a test switch is installed which automati-
cally short-circuits the current transformer
secondary leads, it is sufficient to set this
switch tothe ”Test” position. The short-cir-
cuit switch must be checked beforehand
(refer Section 5.2.5).
DANGER!
It is recommended that the actual settings for the
relay be used for the testing procedure. If these val-
ues are not (yet) available, test the relay with thefac-
tory settings. In the following description of the test
sequence the preset settings are assumed.
For the functional tests a three-phase symmetrical
current source with individually adjustable currents
should be available. Forchecking the pick-upvalues
asingle-phase current source issufficient, but this is
not adequate for a correct functional check of the
measured value monitoring systems.
If unsymmetrical currents occur during the tests it is
likely that the asymmetry monitoring will frequently
operate. Thisisofnoconcernbecause thecondition
of steady-state measured values is monitored and,
under normal operating conditions, these are sym-
metrical; under short circuit conditions these moni-
toring systems are not effective.
NOTE! The accuracy which can be achieved during
testing depends on the accuracy of the testing
equipment. The accuracy values specified in the
Technical data can only be reproduced under the
reference conditions set down in IEC 60255 resp.
VDE 0435/part 303 and with the use of precision
measuring instruments. Thetests are therefore tobe
looked upon purely as functional tests.
During all the tests it is important to ensure that the
correct command (trip) contacts close, that the
proper indications appear at the LEDs and the out-
put relays for remote signalling. If the relay is con-
nected to a central memory device via the serial in-
terface, correct communication between the relay
and the master station must be checked.
After tests which cause LED indications to appear,
these should be reset, at least once by each of the
possible methods: the reset button onthe frontplate
and via the remote reset relay (see connection dia-
grams, Appendix A). Ifthe reset functions havebeen
tested, resetting the stored indications is no more
necessary as they are erased automatically with
each new pick-up of the relay and replaced by the
new annunciations.
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