Four Step Non-Directional Earth Fault Protection; Completing The Test; Thermal Overload Protection, One Time Constant, Celsius/Fahrenheit Lcpttr/Lfpttr; Measuring The Operate And Time Limit Of Set Values - ABB Relion 650 Series Commissioning Manual

1MRK 505 395-UEN C
4. Decrease the current slowly and note the reset value.
5. If the test has been performed by injection of current in phase L1, repeat the test,
injecting current into terminals L2 and L3 with a polarizing voltage connected to
terminals L2, respectively L3.
6. Block lower set steps when testing higher set steps according to the instructions that
follow.
7. Connect a trip output contact to a timer.
8. Set the injected current to 200% of the operate level of the tested step, switch on the
current and check the time delay.
For inverse time curves, check the operate time at a current equal to 110% of the operate
current for
9. Check that all operate and start contacts operate according to the configuration (signal
matrixes)
10. Reverse the direction of the injected current and check that the step does not operate.
11. Check that the protection does not operate when the polarizing voltage is zero.
12. Repeat the above described tests for the higher set steps.
13. Finally, check that start and trip information is stored in the event menu.
9.5.4.2

Four step non-directional earth fault protection

1. Do as described in
any polarizing voltage.
9.5.4.3

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
9.5.5 Thermal overload protection, one time constant, Celsius/
Fahrenheit LCPTTR/LFPTTR
Prepare the IED for verification of settings as outlined in section
section
Check that the input logical signal BLOCK is logical zero and that on the local HMI, the logical
signal TRIP, START and ALARM are equal to logical zero.
9.5.5.1

Measuring the operate and time limit of set values

Testing the protection without external temperature compensation (NonComp)
1. Quickly set the measured current (fault current) in one phase to about 300% of
minimise the trip time), and switch the current off.
2. Reset the thermal memory on the local HMI under Main menu/Reset/Reset
temperature/ThermalOverload1TimeConst(PTTR,26)/LFPTTR:x, Main menu/Reset/
Reset temperature/ThermalOverload1TimeConst(PTTR,26)/LCPTTR:x,
3. Switch the fault current on and take note of the temperature, available on the local HMI
under Main menu/Test/Function status/Current protection/
ThermOverLoad1TimeConst(PTTR,26)/LFPTTR:x/TEMP, Main menu/Test/Function
status/Current protection/ThermOverLoad1TimeConst(PTTR,26)/LCPTTR:x/TEMP,
4. Check the time until the actual temperature TEMP has reached the
during injection.
Line differential protection RED650
Commissioning manual
txMin .
"Four step directional earth fault
"Preparing for test" in this chapter.
© Copyright 2017 ABB. All rights reserved
Testing functionality by secondary injection
protection", but without applying
TESTMODE setting to Off .
"Requirements"
AlarmTemp level
Section 9
SEMOD53296-202 v4
SEMOD53296-122 v4
M14950-2 v7
and
M14950-8 v3
M14950-10 v10
IRef (to
79