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Siemens AG ⋅ January 1999
Figures
Figure 1.1 Line differential protection 7SD600 for operation with two pilot wires, block diagram 1 - 1..
Figure 2.1 Dimensioned drawing of 7XP20 for panel surface mounting with terminals on the sides
(dimensions in mm) 2 - 2...........................................................
Figure 2.2 Dimensioned drawing of 7XP20 for panel surface mounting with terminals at top and bottom
2-3.............................................................................
Figure 2.3 Dimensioned drawing of 7XP20 for panel flush mounting or cubicle mounting
(dimensions in mm) 2 - 4...........................................................
Figure 2.4 Dimensioned drawing of the 4AM4930 2 - 5..........................................
Figure 3.1 Stabilization characteristic of the differential protection (shown for pre-settings) 3 - 7......
Figure 3.2 Summation transformer 4AM4930 3 - 9..............................................
Figure 4.1 Hardware structure of the line differential protection 7SD600 4 - 1.......................
Figure 4.2 Standard connection of summation transformer 4AM4930 4 - 3.........................
Figure 4.3 Connection of summation transformer 4AM4930 to 2-current transformers
in isolated-neutral systems or systems which are not effectively earthed. 4 - 4............
Figure 4.4 Basic principle of differential protection 4 - 5..........................................
Figure 4.5 Differential protection with two pilot wires - flow chart 4 - 6............................
Figure 4.6 Stabilization characteristic of the differential protection 4 - 7............................
Figure 4.7 Simplified logic diagram of the differential protection 4 - 10..............................
Figure 4.8 Coupling of pilot wire monitoring 4 - 12................................................
Figure 4.9 Logic diagram of the functions related to the pilot wire monitoring 4 - 14..................
Figure 5.1 Check set nominal voltage of the integrated power supply 5 - 4.........................
Figure 5.2 Check of selected control voltages of binary inputs 1 to 3 on the p.c.b. 5 - 5..............
Figure 5.3 Standard connection L1ā-āL3ā-āE 5 - 7.................................................
Figure 5.4 Connection L1ā-āL2ā-āL3 with reduced earth-fault sensitivity 5 - 7.........................
Figure 5.5 Connection L1ā-āL3ā-āE with increased earth-fault sensitivity 5 - 7.........................
Figure 5.6 Matching unequal primary currents 5 - 8..............................................
Figure 5.7 Two-phase connection L1ā-āL3 5 - 8..................................................
Figure 5.8 Connection of isolating transformer 7XR9513 5 - 10.....................................
Figure 5.9 Excerpt from the menu tree: Selection of configuration blocks 5 - 13......................
Figure 5.10 Excerpt from the menu tree: Selecting configuration block for the protective functions 5 - 18
Figure 5.11 Excerpt from the menu tree: Example for selecting marshalling of binary inputs 5 - 21.......
Figure 6.1 Front view of 7SD600 with control panel and displays 6 - 3.............................
Figure 6.2 Selection of parameters for the system and station data 6 - 4...........................
Figure 6.3 Trip characteristic of the 7SD600 6 - 11................................................
Figure 6.4 Selection of the event blocks 6 - 18...................................................
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