Protective Device Coordination Software


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Sequence-of-Operation

Protective Device Coordination Sequence of Operation - Device Coordination Protection
Star Protective Device Sequence-of-Operation
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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 Time Current Characteristic 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.

Sequence of Operation Key Features

  • 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
  • Current summation
  • Normalized (shifted) Time Current Characteristic Curves
  • Phase & Ground faults (symmetrical & asymmetrical)
  • Flashing protective device via the one-line diagram
Protective Device Coordination Sequence of Operation - Drag and Drop Faults
Drag & Drop Faults

Drag & Drop a Fault

  • Phase & ground faults
  • Display fault currents on the one-line diagram
  • Illustrate system wide coordination
  • Tabulate operating times via an event viewer
  • Customizable report

Protective Device Coordination Sequence of Operation - Graphical Animation of Protective Device Operation
Graphical Animation of Protective Device Options
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Coordination via One-Line Diagram

  • 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

Normalized Time Current Characteristic Curve

Normalized (Shifted) Time Current Characteristic Curve 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 Time Current Characteristic Curve mode graphically displays the Time Current Characteristic Curves of protective devices in relation to one and another for a given fault.

Protective Device Coordination Sequence of Operation - Normalized Time Current Characteristics Curve
Normalized Time Current Characteristic Curve
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Sequence of Event Viewer

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 Time Current Characteristic Curve based on the individual fault contribution level.