Activating Test Mode; Connecting Test Equipment To The Ied - ABB Relion 670 Series Installation And Commissioning Manual

Section 15
Verifying settings by secondary injection
15.2.3
15.2.4
150
are given a chance to decay before the trip circuits are restored. When the latches
are released, the handle can be completely withdrawn from the test switch,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, take measures according to provided circuit diagrams.
Never disconnect the secondary connection of a current transformer
circuit without 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 injure humans.

Activating test mode

Put the IED into the test mode before testing. The test mode blocks all functions in
the IED, and the individual functions to be tested can be unblocked to prevent
unwanted operation caused by other functions. In this way, it is possible to test
slower back-up measuring functions without the interference from faster measuring
functions. Test mode is indicated when the yellow StartLED flashes.
Procedure
1. Browse to the TestMode menu and press E.
The TestMode menu is found on the local HMI under Main menu/Test/IED
test mode/TestMode
2. Use the up and down arrows to choose On and press E.
3. Press the left arrow to exit the menu.
The dialog box Save changes appears.
4. Choose Yes, press E and exit the menu.
The yellow startLED above the LCD will start flashing when the IED is in
test mode.

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 87.
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.
1MRK 502 029-UEN A
Installation and commissioning manual