cause a massive potential build up that may damage the transformer and
cause personal injury.
10.4 Connecting the 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 19.
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 grounded before testing.
IA
IB
IC
IN
VA
VB
VC
VN
IA
IB
IC
VA
IN (I4,I5)
TRIP A
TRIP B
TRIP C
T
e
s
t
e
q
u
i
p
m
e
n
t
I
E
D
ANSI09000652-1-en.vsd
VB
VC
VN
VN (U4,U5)
IEC 61850
ANSI09000652 V1 EN
Figure 19: Connection example of the test equipment to the IED when test
equipment is connected to the transformer input module
1MRK 504 165-UUS - Section 10
Testing IED operation
Transformer protection RET670 2.2 ANSI 93
Commissioning manual
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