Connecting The Test Equipment To The Ied - ABB Relion 670 Series REL670 Commissioning Manual

1MRK 506 355-UEN A
9.4
Line distance protection REL670 2.1 IEC
Commissioning manual
released, the handle can be completely withdrawn from the test switch, restoring the
trip circuits to the protection IED.
If a test switch is not used, perform measurement according to the provided circuit
diagrams.
Never disconnect the secondary connection of a current transformer
circuit without first short-circuiting the transformer's secondary
winding. Operating a current transformer with the secondary winding
open will cause a massive potential build up that may damage the
transformer and cause personal injury.

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 10.
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.
The MU test equipment must be connected to the CD port on the OEM
module when process bus IEC61850-9-2LE communication is used.
To ensure correct results, make sure that the IED as well as the test
equipment are properly earthed before testing.
Section 9
Testing IED operation
73