10.7 Testing the protection functionality...................................................................................... 84
10.8 Forcing of binary input/output signals for testing.................................................................84
10.8.1 Forcing concept.................................................................................................................84
10.8.2 How to enable forcing........................................................................................................85
10.8.2.1 Enable forcing by using LHMI...................................................................................... 85
10.8.2.2 Enable forcing using TESTMODE function block.........................................................85
10.8.3 How to change binary input/output signals using forcing.................................................. 85
10.8.3.1 Forcing by using LHMI................................................................................................. 85
10.8.3.2 Forcing by using PCM600............................................................................................87
10.8.4 How to undo forcing changes and return the IED to normal operation............................. 88
10.8.4.1 Undo forcing by using TESTMODE component...........................................................89
10.8.4.2 Undo forcing by using LHMI.........................................................................................89
10.8.4.3 Undo forcing by using PCM600................................................................................... 89
Section 11 Testing functionality by secondary injection............................................91
11.1 Testing disturbance report...................................................................................................91
11.1.1 Introduction........................................................................................................................91
11.1.2 Disturbance report settings............................................................................................... 91
11.1.3 Disturbance recorder (DR)................................................................................................ 91
11.1.4 Event recorder (ER) and Event list (EL)............................................................................92
11.2 Identifying the function to test in the technical reference manual .......................................92
11.3 Differential protection.......................................................................................................... 92
11.3.1 High impedance differential protection HZPDIF ...............................................................92
11.3.1.1 Verifying the settings.................................................................................................... 92
11.3.1.2 Completing the test...................................................................................................... 93
11.3.2 Restricted earth fault protection, low impedance REFPDIF .............................................93
11.3.2.1 Function revision history.............................................................................................. 93
11.3.2.2 Verifying the settings.................................................................................................... 93
11.3.2.3 Completing the test...................................................................................................... 94
11.3.3 Line differential protection L4CPDIF................................................................................. 94
11.3.3.1 Function revision history.............................................................................................. 95
11.3.3.2 Verifying the settings.................................................................................................... 95
11.3.3.3 Completing the test...................................................................................................... 96
11.3.4 Line differential protection L3CPDIF and L6CPDIF ..........................................................96
11.3.4.1 Verifying the settings.................................................................................................... 97
11.3.4.2 Completing the test...................................................................................................... 97
11.3.5 Additional security logic for differential protection LDRGFC ............................................ 97
11.3.5.1 Verifying the settings.................................................................................................... 97
11.3.5.2 Completing the test...................................................................................................... 99
11.4 Impedance protection..........................................................................................................99
11.4.1 Distance protection zones, quadrilateral characteristic ZMQPDIS ...................................99
11.4.1.1 Measuring the operating limit of set values................................................................102
11.4.1.2 Measuring the operating time of distance protection zones.......................................102
11.4.1.3 Completing the test.................................................................................................... 103
11.4.2 Phase selection, quad, fixed angle, load encroachment FDPSPDIS .............................103
11.4.2.1 Measuring the operating limit of set values................................................................105
1MRK 505 378-UEN Rev. K Table of contents
Line differential protection RED670 3
Commissioning manual
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