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DRAFT, not reviewed. No reference was checked and no study spec was given: the agent chose the scope, boundary and what can fail itself (see Assumptions). Have an engineer review it before use.

r_20261029_184008_ff3d

done
drawing
Sample1.png
reference
none
at
2026-10-29T18:40:08Z

Review

If these are right, every cut set is right: the cut sets are computed from the paths and what can fail.

1 · Power reaches the load by these paths

Click a path to light it up on the drawing. Is every part on that route boxed, and nothing extra?

2 · Parts not on the drawing

3 · Assumptions

Send review

Opens your email with what you ticked, what you didn't, and your note.

Summary

Single points of failure

1 component: if any one of these fails on its own, the supply is lost.

Pairs

26 pairs: the supply is lost only if both components of a pair fail together.

Click a set to highlight its components on the drawing and in the block diagram; click it again to clear.

Drawing and graph

block (can fail)perfect connectorin a cut-set difference

Hover a box to see its own connections.

735kV LINES (source), confidence 0.95735kV LINESBUS 735 (busbar), confidence 0.95BUS 735DS-735-11A (disconnector), confidence 0.95DS-735-11ACB-735-11 (breaker), confidence 0.95CB-735-11CT-735-11 (ct), confidence 0.95CT-735-11DS-735-11B (disconnector), confidence 0.95DS-735-11BTR-01 (transformer), confidence 0.95TR-01DS-735-12A (disconnector), confidence 0.95DS-735-12ACB-735-12 (breaker), confidence 0.95CB-735-12CT-735-12 (ct), confidence 0.95CT-735-12DS-735-12B (disconnector), confidence 0.95DS-735-12BTR-02 (transformer), confidence 0.95TR-02DS-315-111A (disconnector), confidence 0.95DS-315-111ACB-315-111 (breaker), confidence 0.95CB-315-111CT-315-111 (ct), confidence 0.95CT-315-111DS-315-111B (disconnector), confidence 0.95DS-315-111BDS-315-112A (disconnector), confidence 0.95DS-315-112ACB-315-112 (breaker), confidence 0.95CB-315-112CT-315-112 (ct), confidence 0.95CT-315-112DS-315-112B (disconnector), confidence 0.95DS-315-112BDS-315-121A (disconnector), confidence 0.95DS-315-121ACB-315-121 (breaker), confidence 0.95CB-315-121CT-315-121 (ct), confidence 0.95CT-315-121DS-315-121B (disconnector), confidence 0.95DS-315-121BDS-315-122A (disconnector), confidence 0.95DS-315-122ACB-315-122 (breaker), confidence 0.95CB-315-122CT-315-122 (ct), confidence 0.95CT-315-122DS-315-122B (disconnector), confidence 0.95DS-315-122BBUS 315-A (busbar), confidence 0.95BUS 315-ABUS 315-B (busbar), confidence 0.95BUS 315-B315kV NETWORK (sink), confidence 0.8315kV NETWORK
Page 1

Cut sets

Reference: none

No verdict: nothing was compared with a reference. These are the model's own cut sets.

This model

Minimal cut sets up to order 3. Click an order to show or hide it.

Order 1 (1)
  • {BUS 735}
Order 2 (26)
  • {BUS 315-A, BUS 315-B}
  • {CB-735-11, CB-735-12}
  • {CB-735-11, CT-735-12}
  • {CB-735-11, DS-735-12A}
  • {CB-735-11, DS-735-12B}
  • {CB-735-11, TR-02}
  • {CB-735-12, CT-735-11}
  • {CB-735-12, DS-735-11A}
  • {CB-735-12, DS-735-11B}
  • {CB-735-12, TR-01}
  • {CT-735-11, CT-735-12}
  • {CT-735-11, DS-735-12A}
  • {CT-735-11, DS-735-12B}
  • {CT-735-11, TR-02}
  • {CT-735-12, DS-735-11A}
  • {CT-735-12, DS-735-11B}
  • {CT-735-12, TR-01}
  • {DS-735-11A, DS-735-12A}
  • {DS-735-11A, DS-735-12B}
  • {DS-735-11A, TR-02}
  • {DS-735-11B, DS-735-12A}
  • {DS-735-11B, DS-735-12B}
  • {DS-735-11B, TR-02}
  • {DS-735-12A, TR-01}
  • {DS-735-12B, TR-01}
  • {TR-01, TR-02}
Order 3 (272)
  • {BUS 315-A, CB-315-112, CB-315-122}
  • {BUS 315-A, CB-315-112, CB-735-12}
  • {BUS 315-A, CB-315-112, CT-315-122}
  • {BUS 315-A, CB-315-112, CT-735-12}
  • {BUS 315-A, CB-315-112, DS-315-122A}
  • {BUS 315-A, CB-315-112, DS-315-122B}
  • {BUS 315-A, CB-315-112, DS-735-12A}
  • {BUS 315-A, CB-315-112, DS-735-12B}
  • {BUS 315-A, CB-315-112, TR-02}
  • {BUS 315-A, CB-315-122, CB-735-11}
  • {BUS 315-A, CB-315-122, CT-315-112}
  • {BUS 315-A, CB-315-122, CT-735-11}
  • {BUS 315-A, CB-315-122, DS-315-112A}
  • {BUS 315-A, CB-315-122, DS-315-112B}
  • {BUS 315-A, CB-315-122, DS-735-11A}
  • {BUS 315-A, CB-315-122, DS-735-11B}
  • {BUS 315-A, CB-315-122, TR-01}
  • {BUS 315-A, CB-735-11, CT-315-122}
  • {BUS 315-A, CB-735-11, DS-315-122A}
  • {BUS 315-A, CB-735-11, DS-315-122B}
  • {BUS 315-A, CB-735-12, CT-315-112}
  • {BUS 315-A, CB-735-12, DS-315-112A}
  • {BUS 315-A, CB-735-12, DS-315-112B}
  • {BUS 315-A, CT-315-112, CT-315-122}
  • {BUS 315-A, CT-315-112, CT-735-12}
  • {BUS 315-A, CT-315-112, DS-315-122A}
  • {BUS 315-A, CT-315-112, DS-315-122B}
  • {BUS 315-A, CT-315-112, DS-735-12A}
  • {BUS 315-A, CT-315-112, DS-735-12B}
  • {BUS 315-A, CT-315-112, TR-02}
  • {BUS 315-A, CT-315-122, CT-735-11}
  • {BUS 315-A, CT-315-122, DS-315-112A}
  • {BUS 315-A, CT-315-122, DS-315-112B}
  • {BUS 315-A, CT-315-122, DS-735-11A}
  • {BUS 315-A, CT-315-122, DS-735-11B}
  • {BUS 315-A, CT-315-122, TR-01}
  • {BUS 315-A, CT-735-11, DS-315-122A}
  • {BUS 315-A, CT-735-11, DS-315-122B}
  • {BUS 315-A, CT-735-12, DS-315-112A}
  • {BUS 315-A, CT-735-12, DS-315-112B}
  • {BUS 315-A, DS-315-112A, DS-315-122A}
  • {BUS 315-A, DS-315-112A, DS-315-122B}
  • {BUS 315-A, DS-315-112A, DS-735-12A}
  • {BUS 315-A, DS-315-112A, DS-735-12B}
  • {BUS 315-A, DS-315-112A, TR-02}
  • {BUS 315-A, DS-315-112B, DS-315-122A}
  • {BUS 315-A, DS-315-112B, DS-315-122B}
  • {BUS 315-A, DS-315-112B, DS-735-12A}
  • {BUS 315-A, DS-315-112B, DS-735-12B}
  • {BUS 315-A, DS-315-112B, TR-02}
  • {BUS 315-A, DS-315-122A, DS-735-11A}
  • {BUS 315-A, DS-315-122A, DS-735-11B}
  • {BUS 315-A, DS-315-122A, TR-01}
  • {BUS 315-A, DS-315-122B, DS-735-11A}
  • {BUS 315-A, DS-315-122B, DS-735-11B}
  • {BUS 315-A, DS-315-122B, TR-01}
  • {BUS 315-B, CB-315-111, CB-315-121}
  • {BUS 315-B, CB-315-111, CB-735-12}
  • {BUS 315-B, CB-315-111, CT-315-121}
  • {BUS 315-B, CB-315-111, CT-735-12}
  • {BUS 315-B, CB-315-111, DS-315-121A}
  • {BUS 315-B, CB-315-111, DS-315-121B}
  • {BUS 315-B, CB-315-111, DS-735-12A}
  • {BUS 315-B, CB-315-111, DS-735-12B}
  • {BUS 315-B, CB-315-111, TR-02}
  • {BUS 315-B, CB-315-121, CB-735-11}
  • {BUS 315-B, CB-315-121, CT-315-111}
  • {BUS 315-B, CB-315-121, CT-735-11}
  • {BUS 315-B, CB-315-121, DS-315-111A}
  • {BUS 315-B, CB-315-121, DS-315-111B}
  • {BUS 315-B, CB-315-121, DS-735-11A}
  • {BUS 315-B, CB-315-121, DS-735-11B}
  • {BUS 315-B, CB-315-121, TR-01}
  • {BUS 315-B, CB-735-11, CT-315-121}
  • {BUS 315-B, CB-735-11, DS-315-121A}
  • {BUS 315-B, CB-735-11, DS-315-121B}
  • {BUS 315-B, CB-735-12, CT-315-111}
  • {BUS 315-B, CB-735-12, DS-315-111A}
  • {BUS 315-B, CB-735-12, DS-315-111B}
  • {BUS 315-B, CT-315-111, CT-315-121}
  • {BUS 315-B, CT-315-111, CT-735-12}
  • {BUS 315-B, CT-315-111, DS-315-121A}
  • {BUS 315-B, CT-315-111, DS-315-121B}
  • {BUS 315-B, CT-315-111, DS-735-12A}
  • {BUS 315-B, CT-315-111, DS-735-12B}
  • {BUS 315-B, CT-315-111, TR-02}
  • {BUS 315-B, CT-315-121, CT-735-11}
  • {BUS 315-B, CT-315-121, DS-315-111A}
  • {BUS 315-B, CT-315-121, DS-315-111B}
  • {BUS 315-B, CT-315-121, DS-735-11A}
  • {BUS 315-B, CT-315-121, DS-735-11B}
  • {BUS 315-B, CT-315-121, TR-01}
  • {BUS 315-B, CT-735-11, DS-315-121A}
  • {BUS 315-B, CT-735-11, DS-315-121B}
  • {BUS 315-B, CT-735-12, DS-315-111A}
  • {BUS 315-B, CT-735-12, DS-315-111B}
  • {BUS 315-B, DS-315-111A, DS-315-121A}
  • {BUS 315-B, DS-315-111A, DS-315-121B}
  • {BUS 315-B, DS-315-111A, DS-735-12A}
  • {BUS 315-B, DS-315-111A, DS-735-12B}
  • {BUS 315-B, DS-315-111A, TR-02}
  • {BUS 315-B, DS-315-111B, DS-315-121A}
  • {BUS 315-B, DS-315-111B, DS-315-121B}
  • {BUS 315-B, DS-315-111B, DS-735-12A}
  • {BUS 315-B, DS-315-111B, DS-735-12B}
  • {BUS 315-B, DS-315-111B, TR-02}
  • {BUS 315-B, DS-315-121A, DS-735-11A}
  • {BUS 315-B, DS-315-121A, DS-735-11B}
  • {BUS 315-B, DS-315-121A, TR-01}
  • {BUS 315-B, DS-315-121B, DS-735-11A}
  • {BUS 315-B, DS-315-121B, DS-735-11B}
  • {BUS 315-B, DS-315-121B, TR-01}
  • {CB-315-111, CB-315-112, CB-735-12}
  • {CB-315-111, CB-315-112, CT-735-12}
  • {CB-315-111, CB-315-112, DS-735-12A}
  • {CB-315-111, CB-315-112, DS-735-12B}
  • {CB-315-111, CB-315-112, TR-02}
  • {CB-315-111, CB-735-12, CT-315-112}
  • {CB-315-111, CB-735-12, DS-315-112A}
  • {CB-315-111, CB-735-12, DS-315-112B}
  • {CB-315-111, CT-315-112, CT-735-12}
  • {CB-315-111, CT-315-112, DS-735-12A}
  • {CB-315-111, CT-315-112, DS-735-12B}
  • {CB-315-111, CT-315-112, TR-02}
  • {CB-315-111, CT-735-12, DS-315-112A}
  • {CB-315-111, CT-735-12, DS-315-112B}
  • {CB-315-111, DS-315-112A, DS-735-12A}
  • {CB-315-111, DS-315-112A, DS-735-12B}
  • {CB-315-111, DS-315-112A, TR-02}
  • {CB-315-111, DS-315-112B, DS-735-12A}
  • {CB-315-111, DS-315-112B, DS-735-12B}
  • {CB-315-111, DS-315-112B, TR-02}
  • {CB-315-112, CB-735-12, CT-315-111}
  • {CB-315-112, CB-735-12, DS-315-111A}
  • {CB-315-112, CB-735-12, DS-315-111B}
  • {CB-315-112, CT-315-111, CT-735-12}
  • {CB-315-112, CT-315-111, DS-735-12A}
  • {CB-315-112, CT-315-111, DS-735-12B}
  • {CB-315-112, CT-315-111, TR-02}
  • {CB-315-112, CT-735-12, DS-315-111A}
  • {CB-315-112, CT-735-12, DS-315-111B}
  • {CB-315-112, DS-315-111A, DS-735-12A}
  • {CB-315-112, DS-315-111A, DS-735-12B}
  • {CB-315-112, DS-315-111A, TR-02}
  • {CB-315-112, DS-315-111B, DS-735-12A}
  • {CB-315-112, DS-315-111B, DS-735-12B}
  • {CB-315-112, DS-315-111B, TR-02}
  • {CB-315-121, CB-315-122, CB-735-11}
  • {CB-315-121, CB-315-122, CT-735-11}
  • {CB-315-121, CB-315-122, DS-735-11A}
  • {CB-315-121, CB-315-122, DS-735-11B}
  • {CB-315-121, CB-315-122, TR-01}
  • {CB-315-121, CB-735-11, CT-315-122}
  • {CB-315-121, CB-735-11, DS-315-122A}
  • {CB-315-121, CB-735-11, DS-315-122B}
  • {CB-315-121, CT-315-122, CT-735-11}
  • {CB-315-121, CT-315-122, DS-735-11A}
  • {CB-315-121, CT-315-122, DS-735-11B}
  • {CB-315-121, CT-315-122, TR-01}
  • {CB-315-121, CT-735-11, DS-315-122A}
  • {CB-315-121, CT-735-11, DS-315-122B}
  • {CB-315-121, DS-315-122A, DS-735-11A}
  • {CB-315-121, DS-315-122A, DS-735-11B}
  • {CB-315-121, DS-315-122A, TR-01}
  • {CB-315-121, DS-315-122B, DS-735-11A}
  • {CB-315-121, DS-315-122B, DS-735-11B}
  • {CB-315-121, DS-315-122B, TR-01}
  • {CB-315-122, CB-735-11, CT-315-121}
  • {CB-315-122, CB-735-11, DS-315-121A}
  • {CB-315-122, CB-735-11, DS-315-121B}
  • {CB-315-122, CT-315-121, CT-735-11}
  • {CB-315-122, CT-315-121, DS-735-11A}
  • {CB-315-122, CT-315-121, DS-735-11B}
  • {CB-315-122, CT-315-121, TR-01}
  • {CB-315-122, CT-735-11, DS-315-121A}
  • {CB-315-122, CT-735-11, DS-315-121B}
  • {CB-315-122, DS-315-121A, DS-735-11A}
  • {CB-315-122, DS-315-121A, DS-735-11B}
  • {CB-315-122, DS-315-121A, TR-01}
  • {CB-315-122, DS-315-121B, DS-735-11A}
  • {CB-315-122, DS-315-121B, DS-735-11B}
  • {CB-315-122, DS-315-121B, TR-01}
  • {CB-735-11, CT-315-121, CT-315-122}
  • {CB-735-11, CT-315-121, DS-315-122A}
  • {CB-735-11, CT-315-121, DS-315-122B}
  • {CB-735-11, CT-315-122, DS-315-121A}
  • {CB-735-11, CT-315-122, DS-315-121B}
  • {CB-735-11, DS-315-121A, DS-315-122A}
  • {CB-735-11, DS-315-121A, DS-315-122B}
  • {CB-735-11, DS-315-121B, DS-315-122A}
  • {CB-735-11, DS-315-121B, DS-315-122B}
  • {CB-735-12, CT-315-111, CT-315-112}
  • {CB-735-12, CT-315-111, DS-315-112A}
  • {CB-735-12, CT-315-111, DS-315-112B}
  • {CB-735-12, CT-315-112, DS-315-111A}
  • {CB-735-12, CT-315-112, DS-315-111B}
  • {CB-735-12, DS-315-111A, DS-315-112A}
  • {CB-735-12, DS-315-111A, DS-315-112B}
  • {CB-735-12, DS-315-111B, DS-315-112A}
  • {CB-735-12, DS-315-111B, DS-315-112B}
  • {CT-315-111, CT-315-112, CT-735-12}
  • {CT-315-111, CT-315-112, DS-735-12A}
  • {CT-315-111, CT-315-112, DS-735-12B}
  • {CT-315-111, CT-315-112, TR-02}
  • {CT-315-111, CT-735-12, DS-315-112A}
  • {CT-315-111, CT-735-12, DS-315-112B}
  • {CT-315-111, DS-315-112A, DS-735-12A}
  • {CT-315-111, DS-315-112A, DS-735-12B}
  • {CT-315-111, DS-315-112A, TR-02}
  • {CT-315-111, DS-315-112B, DS-735-12A}
  • {CT-315-111, DS-315-112B, DS-735-12B}
  • {CT-315-111, DS-315-112B, TR-02}
  • {CT-315-112, CT-735-12, DS-315-111A}
  • {CT-315-112, CT-735-12, DS-315-111B}
  • {CT-315-112, DS-315-111A, DS-735-12A}
  • {CT-315-112, DS-315-111A, DS-735-12B}
  • {CT-315-112, DS-315-111A, TR-02}
  • {CT-315-112, DS-315-111B, DS-735-12A}
  • {CT-315-112, DS-315-111B, DS-735-12B}
  • {CT-315-112, DS-315-111B, TR-02}
  • {CT-315-121, CT-315-122, CT-735-11}
  • {CT-315-121, CT-315-122, DS-735-11A}
  • {CT-315-121, CT-315-122, DS-735-11B}
  • {CT-315-121, CT-315-122, TR-01}
  • {CT-315-121, CT-735-11, DS-315-122A}
  • {CT-315-121, CT-735-11, DS-315-122B}
  • {CT-315-121, DS-315-122A, DS-735-11A}
  • {CT-315-121, DS-315-122A, DS-735-11B}
  • {CT-315-121, DS-315-122A, TR-01}
  • {CT-315-121, DS-315-122B, DS-735-11A}
  • {CT-315-121, DS-315-122B, DS-735-11B}
  • {CT-315-121, DS-315-122B, TR-01}
  • {CT-315-122, CT-735-11, DS-315-121A}
  • {CT-315-122, CT-735-11, DS-315-121B}
  • {CT-315-122, DS-315-121A, DS-735-11A}
  • {CT-315-122, DS-315-121A, DS-735-11B}
  • {CT-315-122, DS-315-121A, TR-01}
  • {CT-315-122, DS-315-121B, DS-735-11A}
  • {CT-315-122, DS-315-121B, DS-735-11B}
  • {CT-315-122, DS-315-121B, TR-01}
  • {CT-735-11, DS-315-121A, DS-315-122A}
  • {CT-735-11, DS-315-121A, DS-315-122B}
  • {CT-735-11, DS-315-121B, DS-315-122A}
  • {CT-735-11, DS-315-121B, DS-315-122B}
  • {CT-735-12, DS-315-111A, DS-315-112A}
  • {CT-735-12, DS-315-111A, DS-315-112B}
  • {CT-735-12, DS-315-111B, DS-315-112A}
  • {CT-735-12, DS-315-111B, DS-315-112B}
  • {DS-315-111A, DS-315-112A, DS-735-12A}
  • {DS-315-111A, DS-315-112A, DS-735-12B}
  • {DS-315-111A, DS-315-112A, TR-02}
  • {DS-315-111A, DS-315-112B, DS-735-12A}
  • {DS-315-111A, DS-315-112B, DS-735-12B}
  • {DS-315-111A, DS-315-112B, TR-02}
  • {DS-315-111B, DS-315-112A, DS-735-12A}
  • {DS-315-111B, DS-315-112A, DS-735-12B}
  • {DS-315-111B, DS-315-112A, TR-02}
  • {DS-315-111B, DS-315-112B, DS-735-12A}
  • {DS-315-111B, DS-315-112B, DS-735-12B}
  • {DS-315-111B, DS-315-112B, TR-02}
  • {DS-315-121A, DS-315-122A, DS-735-11A}
  • {DS-315-121A, DS-315-122A, DS-735-11B}
  • {DS-315-121A, DS-315-122A, TR-01}
  • {DS-315-121A, DS-315-122B, DS-735-11A}
  • {DS-315-121A, DS-315-122B, DS-735-11B}
  • {DS-315-121A, DS-315-122B, TR-01}
  • {DS-315-121B, DS-315-122A, DS-735-11A}
  • {DS-315-121B, DS-315-122A, DS-735-11B}
  • {DS-315-121B, DS-315-122A, TR-01}
  • {DS-315-121B, DS-315-122B, DS-735-11A}
  • {DS-315-121B, DS-315-122B, DS-735-11B}
  • {DS-315-121B, DS-315-122B, TR-01}

Gaps

  • 315kV NETWORK (sink) The drawing shows two separate exports to the 315 kV network (BUS 315-A and BUS 315-B). I assumed that supplying either bus is enough. If the study needs both buses energised, or one particular bus, the sink and success rule have to change and the cut sets will differ.
  • BUS 735 / 735kV LINES The single source arrow lands on BUS 735 ('735 kV LINES', plural), but the drawing gives no line count and no 735 kV line bays. The incoming lines are treated as one perfect source, so BUS 735 is a single point of failure.

Assumptions

Scope: 735/315 kV transformation inside the dashed study boundary: BUS 735, two transformer bays (DS/CB/CT/DS + TR-01, TR-02), four 315 kV bays, BUS 315-A and BUS 315-B. All switches normally closed (Note 1).. The drawing's boundary note says items outside the box are out of scope.

Boundary: Source = 735 kV incoming lines feeding BUS 735; sink = the 315 kV network fed by both BUS 315-A and BUS 315-B (one virtual sink node joined to both buses).. These are the boundary crossings of the study box. Both 315 kV buses export to the same network, so a single combined sink is used.

Can fail: breaker, disconnector, ct, transformer, busbar. All in-boundary primary equipment can fail. The 735 kV lines source and the 315 kV network sink are outside the study boundary (dashed red box), so they are treated as perfect terminals.

Success: any_path. The station succeeds if power can get from the 735 kV lines to the 315 kV network through either BUS 315-A or BUS 315-B. Both buses feed the network, and capacity limits are not modelled (one 1650 MVA transformer is assumed enough).

Not modelled:

  • Capacity, loading and N-1 thermal limits: Connectivity-only model; any_path does not check whether one transformer can carry the full load.
  • Protection, control and auxiliary systems: Note 4 says these are not shown on the drawing.
  • Common-cause failures, maintenance outages, switching/repair times: Not shown on the SLD; outside a basic minimal-cut-set structural model.
  • Breaker failure to clear faults (fault propagation to buses): Only open-circuit (series) failures are modelled; active failures spreading through protection are not shown.