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Use |
"Protecting Device" - "Upstream Device" |
Scaling |
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Selecting Use Rule enables user to use the associated Scaling Factor, also referred to as the Coordination Rule Parameter. The value is used in the evaluation for the coordination of protecting device curves versus upstream device curves. The Coordination Rule Parameter scales the operational time of the protecting device curve that is compared against the upstream device curve. |
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The following protective - upstream device associations are available for use by the application:
Fuse Clearing - Fuse Melting - uses the input scaling value (i.e. 0.75 in dialog shown), which scales the operational time of the protecting Fuse Clearing Curve that is compared against the upstream Fuse Melting Curve. Coordination occurs when operational time of the protecting Fuse Clearing Curve is faster than the upstream Fuse Melting Curve.
Fuse Melting - Recloser Fast Curve - uses the scaling value (set at 1.0 in current version of application), which scales the operational time of the protecting Fuse Melting Curve that is compared against the upstream Recloser Fast Trip Curve. Coordination occurs when operational time of the upstream Recloser Fast Trip Curve is faster than the protecting Fuse Melting Curve. This Rule provides Fuse protection via upstream Recloser Fast Trip operations to clear momentary faults on the system.
Fuse Clearing - Recloser Delay Curve - uses the scaling value (set at 1.0 in current version of application), which scales the operational time of the protecting Fuse Clearing Curve that is compared against the upstream Recloser Delay Trip Curve. Coordination occurs when operational time of the protecting Fuse Clearing Curve is faster than the upstream Recloser Delay Trip Curve.
Fuse Melting - Ground Relay Curve - uses the scaling value (set at 1.0 in current version of application), which scales the operational time of the protecting Fuse Melting Curve that is compared against the upstream Ground Relay Curve. Coordination occurs when operational time of the upstream Ground Relay Curve is faster than the protecting Fuse Melting Curve. This rule provides fuse protection via upstream Ground Relay trip operations to clear momentary faults on the system.
Fuse Clearing - Phase Relay Curve - uses the scaling value (set at 1.0 in current version of application), which scales the operational time of the protecting Fuse Clearing Curve that is compared against the upstream Ground Relay Curve. Coordination occurs when operational time of the protecting Fuse Clearing Curve is faster than the upstream Phase Relay Curve.
Recloser Delay - Fuse Melting - uses the scaling value (set at 1.0 in current version of application), which scales the operational time of the protecting Recloser Delay Trip Curve that is compared against the upstream Fuse Clearing Curve. Coordination occurs when operational time of the protecting Recloser Delay Trip Curve is faster than the upstream Fuse Clearing Curve.
Recloser Fast - Recloser Fast Curves - uses the scaling value (set at 1.0 in current version of application), which scales the operational time of the protecting Recloser Fast Trip Curve that is compared against the upstream Recloser Fast Trip Curve. Coordination occurs when operational time of the protecting Recloser Fast Trip Curve is faster than the upstream Recloser Fast Trip Curve. Additional settings affecting operation of reclosers in series are input from the Advanced Setup Options command.
Recloser Delay - Recloser Delay Curves - uses the scaling value (set at 1.0 in current version of application), which scales the operational time of the protecting Recloser Delay Trip Curve that is compared against the upstream Recloser Delay Trip Curve. Coordination occurs when operational time of the protecting Recloser Delay Trip Curve is faster than the upstream Recloser Delay Trip Curve. Additional settings affecting operation of reclosers in series are input from the Advanced Setup Options command.
Recloser Delay - Phase Relay Curves - uses the scaling value (set at 1.0 in current version of application), which scales the operational time of the protecting Recloser Delay Trip Curve that is compared against the upstream Relay Curve. Coordination occurs when operational time of the protecting Recloser Delay Trip Curve is faster than the upstream Relay Phase Curve.
Run Power Flow - selecting option enables display and input of the Load Scaling Factor, which can be used to scale the calculated load currents by an anticipated load growth factor.
Load Scaling Factor [___] - when enabled, allows input of a multiplicative scaling factor for the load currents in the system. The value entered must be greater than or equal to 1.0 and results in the load currents obtained from Power Flow being multiplied by the entered value (e.g. 1.75).
Arcing
Impedance
R
[___] X
[___] - when active, allows user to enter the Resistance (R) and
Reactance (X) values of arcing impedance used during fault current calculations.
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Note! |
If the user has selected "Calculate MINIMUM Faults as Percentage of MAXIMUM Fault Amperes" in the Advanced User Options Settings dialog (via [Advanced Setup Options] command), then the Arcing Impedance fields are unused and inactive. |
Check MIN Fault Amps
- when selected, the Minimum
Fault Amperes will be included when doing coordination checks among device
pairs. Otherwise, only the maximum fault amps are
used for coordination checks.
Auto Extend Curve Ending Points - when selected, the application will Automatically extend the Maximum ending point of all Time-Current curves to the value specified in the following data entry field:
Extend
Curve MAX to [___] - specifies endpoint value used for auto-extension
of TCC
curves, when applicable.
Interactive
Design Mode - when selected, application runs on selected circuits,
allowing user to interactively select/check the protection device coordination
and circuit protection.
Generate Output Data Report - directs application to generate two output text reports during the analysis run. The first report is the Device Pair Coordination Failure Report (with default name of "ckt-id_CrdDevFailures.REP"), which provides results for the mis-coordinated devices. The second report is the Device Pair Coordination Report (with default name of "ckt-id_CrdDevInfo.REP"), which provides coordination results for all device pairs.
Assign Report Name - allows user to specify report name and directory where saved.
[Advanced Setup Options] - Clicking this command button launches the submenu shown below, which provides access to advanced setup options.
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Recloser : Recloser MIN Separation Time Settings:(The separation time prevents both Reclosers from simultaneously locking on for a permanent fault on the circuit in the protecting recloser’s zone)
Minimum Fault Amperes Sensitivity Calculated from Maximum Fault Amperes:
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(The separation time prevents both Reclosers from simultaneously locking on for a permanent fault on the circuit in the protecting recloser’s zone)
Small Hydraulic Types [___] - specifies the required separation time, in Cycles, used when similar reclosers (of Small Hydraulic Types) are located in series on a circuit. For example, dialog specifies the value used for Small Hydraulic Types separation to be 12 Cycles (i.e. 0.200 Seconds).
Large Hydraulic Types [___] - specifies the required separation time, in Cycles, used when similar reclosers (of Large Hydraulic Types) are located in series on a circuit. For example, dialog specifies the value used for Large Hydraulic Types separation to be 8 Cycles (i.e. 0.133 Seconds).
Electronic Types [___] - specifies the required separation time, in Cycles, used when similar reclosers (of Electronic Types) are located in series on a circuit. For example, dialog specifies the value used for Electronic Types separation to be 0 Cycles (i.e. 0.000 Seconds).
Include Minimum Separation Time Offset on Recloser:Recloser Plots - when selected, Recloser:Recloser Device pair combinations will be plotted with the Minimum Separation Time (in seconds) applied to the device curve plots.
Calculate Minimum Faults as Percentage of Maximum Fault Amperes - when selected, application sets the Minimum Fault Amperes at every component based on the percentage value specified in the following data entry field:
Percentage Maximum Fault Amperes to Use: [___] - specifies the percentage of maximum fault amps used in calculation of minimum fault current, when applicable.
[Run Plot Setup Options] - Clicking this command button launches the submenu shown below, which provides access to plotting setup options.
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Plot Type Selection:
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Standard TCC Scheme - select option to have plots incorporate the standard color scheme, which is as shown above, except locked on selections.
Custom TCC Plots - choosing option allows user to customize scheme for application plots, selecting:
Background Color to Use
Border Color to Use
Text Color to Use
Curve Line Thickness
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General functionality for common windows commands and features found on dialogs include: Display Window - When applicable, this read-only window typically appears just above the command button set and displays descriptive messages related to the last menu selection. [OK] - Command button to accept current selections as user input and exit dialog. [Cancel] - Command button that exits dialog and does not incorporate any changes made since last opened. [Reset] - Command button that immediately returns all items on the menu to their default settings. [Help] - Command button that launches Help application. [About] - Command button that displays version, copyright and proprietary information. |
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