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Section 11
Testing functionality by secondary injection
1.
Set FunctionMode = Current or CB Pos.
2.
Apply input signal for CB closed to the relevant input or inputs CBCLDL1 (2 or 3).
3.
Apply the fault condition with input signal(s) for start of CCRBRF. The value of current should
be below the set value I>BlkCBPos.
4.
Verify that phase selection re-trip (if selected) and back-up trip are achieved after set times.
Failure to trip is simulated by keeping the signal(s) CB closed activated.
5.
Disconnect the input signal and the START signal(s). Keep the CB closed signal(s).
6.
Apply the fault and the start again. The value of current should be below the set value
I>BlkCBPos.
7.
Arrange disconnection of CB closed signal(s) well before set back-up trip time t2. It simulates a
correct CB tripping.
8.
Verify that back-up trip is not achieved. Re-trip can appear for example, due to selection
RetripMode = Always.
11.5.8.11
Verifying the external start signal has timed out
1.
Set StartMode = FollowStart.
2.
Set FunctionMode = Current.
3.
Use default value for tStartTimeout = 1.0 s.
4.
Use default value for time delay backup trip t2 = 0.150 s.
5.
Leave the inputs for CB close inactivated. These signals should not influence.
6.
Apply START signal, and after 1.5 s apply the current above the set IPh> value.
7.
Check that STALARM signal is set after 1.0 s and backup trip is blocked.
11.5.8.12
Verifying that backup signal is released when STALARM is reset
1.
Set StartMode = FollowStart.
2.
Set FunctionMode = Current.
3.
Use default value for tStartTimeout = 1.0 s.
4.
Use default value for time delay backup trip t2 = 0.150 s.
5.
Leave the inputs for CB close inactivated. These signals should not influence.
6.
Apply START signal at t=0s, and after 1.5 s apply the current above the set IPh> value.
7.
Check that STALARM signal is set after 1.0s and backup trip is blocked.
8.
Reset START signal after 3.5s, ensure that STALARM reset immediately.
9.
Set START after 3.6s, ensure that backup trip is set after t2 backup trip delay has expired
(3.750 s).
11.5.8.13
Test of FollowStart&Mode behaviour
1.
Set StartMode = FollowStart&Mode.
2.
Set FunctionMode = Current.
3.
Set RetripMode = UseFunctionMode.
4.
Use default value for tStartTimeout = 1.0 s.
5.
Use default value for time delay backup trip t2 = 0.150 s.
6.
Use default value for time delay re-trip t1 = 0.000 s.
7.
Leave the inputs for CB close inactivated. These signals should not influence.
8.
Apply START signal, and after 0.200 s apply the current above the set IPh> value.
9.
Check that STALARM does not come and that re-trip TRRET is instantly set at 0.200s while the
backup trip TRBU set only when t2 expires at 0.200 + 0.150s.
168
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1MRK 505 378-UEN Rev. K
GUID-754108D4-E440-4F8F-917B-04579EC1C2C7 v1
GUID-49CA34B6-5AE9-4E45-9F4E-33DA5F626209 v1
GUID-D68675FC-2533-4D6F-A26B-E1611FB7B32A v1
Line differential protection RED670
Commissioning manual
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