winding open will cause a massive potential build up that may
damage the transformer and injure humans.
5.4
Connecting test equipment to the IED
Connect the test equipment according to the IED specific connection diagram and
the needed input and output signals for the function under test. An example of a
connection is shown in figure
Connect the current and voltage terminals. Pay attention to the current polarity.
Make sure that the connection of input and output current terminals and the
connection of the residual current conductor is correct. Check that the input and
output logical signals in the logic diagram for the function under test are connected
to the corresponding binary inputs and outputs of the IED under test.
To ensure correct results, make sure that the IED as well as the test
equipment are properly earthed before testing.
IL1
IL2
IL3
IN
UL1
UL2
UL3
N
IL1
IL2
IL3
UL1
IN
TRIP
T
es
t e
qu
ip
m
en
t
IE
D
UL2
UL3
N
UN
IEC 61850
IEC09000643-1-en.vsd
IEC09000643 V1 EN
Figure 8:
Connection example of the test equipment to the IED when test
equipment is connected to the transformer input module
Section 5
1MRK 511 248-UEN -
Testing IED operation
34
Commissioning Manual
