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Star Sequence-of-Operation evaluates, verifies, and confirms the operation and selectivity of the protective devices for various types of faults for any location directly from the one-line diagram and via normalized TCC curve views.
Sequence-of-Operation provides a system wide solution for an accurate and realistic operating time and state of protective devices, such as relay, fuse, circuit breaker, trip devices, contactor, etc. The operation time is calculated for each protective device based on its settings, time current characteristic, and interlocks for a specified fault location and type. |
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Star Protective Device Sequence-of-Operation |
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- User-definable fault insertion location
- View device operation sequence graphically
- Device failure & backup operation
- Detailed relay actions (27, 49, 50, 51, 51V,
59, 67, 79, 87)
- Sequence of event viewer
- Normalized (shifted) TCC curves
- Phase & Ground faults (symmetrical & asymmetrical)
- Flashing protective device via the one-line diagram
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- Phase & ground faults
- Display fault currents on the one-line diagram
- Illustrate system wide coordination
- Tabulate operating times via an event viewer
- Customizable report
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Drag and Drop Faults |
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Graphical Animation of Protective Device Operation |
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- Graphically place a fault anywhere on the one-line diagram
- Automatically calculate & display the fault current
contributions on the one-line diagram
- Evaluate the operating time & state of devices based on the actual fault current contribution flowing through each individual device
- Graphical animation of protective device operation
- Globally view post fault actions & associated operating time via a tabulated event viewer
- Examine the operation of protective devices via the one-line diagram
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| Normalized (Shifted) TCC mode is an analysis feature in ETAP Star View which is based on Sequence-of-Operation calculation. This analysis mode provides a graphical view of the operation times of protective devices based on their corresponding settings and characteristics for specified fault location and type. Normalized TCC mode graphically displays the TCC curves of protective devices in relation to one and another for a given fault. |
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Normalized Time Current Characteristic Curve |
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| The sequence of operation of protective devices are automatically calculated and listed in an Event Viewer, which is dynamically linked with the one-line diagram. This one-step concept utilizes the intelligent one-line diagram and performs a complete set of actions to determine the operation of all protective devices. This includes internal shifting (normalizing) of each TCC curve based on the individual fault contribution level. |
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