CoordinaideTM

The S&C Protection and Coordination Assistant

 

 

 

Instructions for use

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table of Contents:

 

 

 

 

Introduction

3

Conditions of Use

3

The General Information Screen

4

Device Screens

8

Results Screen

46

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Introduction

 

Coordinaide - The S&C Protection and Coordination Assistant lets you quickly and easily select the optimal S&C protective device (e.g., fuses, TripSaverTM Dropout Reclosers, Vista® Underground Distribution Switchgear, or IntelliRupter® PulseClosers) to:

 

  • Protect transformers against damaging overcurrents and coordinate with primary- and secondary-side protective devices.  See how S&C's novel Transformer Protection Index (TPI) can be used to determine if the primary fuse will protect against certain types of secondary-side faults, including arcing phase-to-ground secondary-side faults.
  • Protect capacitor units against case rupture.
  • Protect underground cables from insulation damage due to excessive temperatures.
  • Protect overhead conductors from damage due to annealing.
  • Confirm the proper operation of protective devices against incident-arc energy curves for various Personal Protective Equipment (PPE) levels.
  • Selectively coordinate two or more devices in series to minimize service interruptions.

 

Conditions of Use

S&C Electric Company does not accept responsibility for, nor warrant the proper application of non-S&C protective devices, or the accuracy of their respective time-current characteristic curves. Moreover, S&C is not responsible for any errors, mistakes, miscalculations, or mis-coordination that may occur through use of the Coordinaide application. Results should be reviewed and approved by a consultant or end user who is familiar with the principles of selective coordination and system and equipment protection.

 

This program is the property of S&C Electric Company, Chicago, IL and may not be sold. Nor may any part of the program source code be used to produce a commercial, marketable product.


The General Information Screen

 

Upon launching the program, the first screen that appears is the General Information screen. See below:

 

 

There are five main areas on this screen:

 

  • Navigation Bar
  • General/System Information
  • TCC Graph
  • Reloading Exported Data
  • Summary

Navigation Bar:

 

At the very top of the screen is the navigation bar with six options:

 

  • General Information – The screen you are presently on.
  • Device #1 – Selection criteria for the first device.
  • Device #2 – Selection criteria for the second device.
  • Device #3 – Selection criteria for the third device.
  • Device #4 – Selection criteria for the fourth device.
  • Results – Displays the results and provides additional options.

 

 Use the navigation bar to move between the different screens.

 

General/System Information:

 

The first section of this screen asks for the general information, viz. a name for the analysis, the date and the name of the person conducting the analysis. The date is automatically taken from the computer system. These three fields are optional.

 

The next section asks for the system information. The fields are:

 

Frequency:

Select the system frequency (50 or 60 Hz)

 

Voltage kV (Three-Phase):

Enter the three-phase system voltage in kilovolts (kV). The default value is 12.47 kV, however, any desired voltage may be entered. To enter a system voltage less than 1kV, use a decimal (e.g. 0.48 kV for 480 volts).

 

Available Fault Current

(RMS Sym. Amperes):

Enter the maximum system available fault current in RMS symmetrical amperes. The default value is 40,000 amperes.

 

Device #1 (Source-Side):

Select any device from the drop-down menu.

Note: Device # 1 is the most source-side device.

 

Device #2:

Select any device from the drop-down menu.

 

Device #3:

Select any device from the drop-down menu.

 

Device #4 (Load-Side):

Select any device from the drop-down menu.

Note: Device # 4 is the most load-side device.

 

There are three buttons that follow the entry fields and are present on most of the screens. They are:

 

Clear All Fields:

At any point in the analysis, you can navigate back to the general information screen, use this option to clear all of the entries that were made, and start over.

 

Draw/Redraw Graph:

Displays the TCC curve of the selected device on the graph on the right-side of the screen. If any changes are made to the ratings or settings of a device, click this button to display those changes without moving to the next device.

 

Continue:

Takes you to the next screen (i.e. to the next device or to the ‘Results’ screen).

 

 

Next is the Import Application function. This feature can be used to import an application that has been exported and saved earlier. Open the saved text file, copy (Ctrl+C) all of the text from the file and paste (Ctrl+V) it into the text box provided. Next, click ‘Import’. All of the ratings and settings from the saved case will be applied and you will be automatically directed to the ‘Results’ screen.

TCC Graph:

 

On the right-hand side of the screen is the graph on which TCC curves for various devices will be plotted. This is a log-log graph with current (in Amperes) on the x-axis and time (in Seconds) on the y-axis with the following default values:

 

  • X-axis – 5 amperes to 100,000 amperes.
  • Y-axis – 0.01 second to 1000 seconds.

 

When changes are made to the ratings and settings of a particular device, they will not appear on the TCC graph immediately. Make all of the required changes to the device and then click on Draw/Redraw Graph to display those changes. Then click Continue to move to the next screen.

 

The current scale for the graph can be changed on the Results screen.

 

Reloading Exported Data:

 

Coordinaide gives you the ability to save and reload recallable settings files.  Once you’ve saved a settings file (see section on Results Page), use this to load the settings back into Coordinaide by clicking “Browse,” selecting the file, and then clicking “Import Selected Settings File.”

 

Summary:

 

The summary consists of three main sections:

 

  • One-line diagram
  • General Information
  • Device Information

 

The summary appears at the bottom of every screen and it is updated when any of the devices are changed.

 

The one-line diagram is very helpful; as devices are added, the symbol for that device appears instead of the default empty box. The one-line diagram can also be used to navigate between the various devices. A sample one-line diagram is shown on the following page.

 

Example One-Line Diagram

 

Device#1

Device#2

Device#3

Device#4

 

This example shows a relayed circuit breaker, a fuse link, a transformer and a recloser.

 

The General Information section displays the same information that was entered on the General Information screen.

 

Below the one-line diagram is the device information area containing four numbered bullets – one for each device. Each bullet displays the specifics for that device, i.e. the device name, manufacturer, type, voltage rating, etc. Each bullet also has a color associated with it. All of the information that pertains to that device is shown in that color. On the TCC graph, the curve(s) for a given device will also appear in the same color. Device 1 is red, Device 2 is blue, Device 3 is yellow and Device 4 is green.


Device Screens

 

Coordinaide can display TCC curves for a maximum of four devices. Each of these devices has a separate selection screen. These screens are similar to the General Information screen. There is the navigation bar, the data-entry fields, the TCC graph, and the summary. However, for every device, the data-entry fields are different, with specific selection options pertaining only to that particular device. Devices available in Coordinaide are:

 

  1. S&C Fault Fiter® Electronic Power Fuse…………………………………………………Page 9
  2. S&C Fault Tamer® Fuse Limiter………………………………………………………....Page 10
  3. S&C Fusistor® Fuse………………………………………………………………………Page 11
  4. S&C IntelliRupter® PulseCloser………………………………………………………….Page 12
  5. S&C TripSaver™ Dropout Recloser………………………………………………………Page 20
  6. S&C Vista® Sw.Gear (Standard Curves) ………………………………………………...Page 21
  7. S&C Vista® Sw.Gear (IEC & US Relays)………………………………………………..Page 22
  8. Capacitor Unit (Case-Rupture Curve) ……………………………………………………..Page 24
  9. Current-Limiting Fuse……………………………………………………………………...Page 25
  10. Fuse Link…………………………………………………………………………………...Page 26
  11. Incident-Arc Energy Curve………………………………………………………………...Page 27
  12. Motor (Generic Starting Curve) …………………………………………………………...Page 29
  13. OH Conductor (Damage Curve) …………………………………………………………..Page 30
  14. Power Fuse…………………………………………………………………………………Page 31
  15. Recloser Point-Based (Hydraulic, Elec Controls) …………………………………………Page 32
  16. Recloser Equation-Based (MicroProcessor Control) ……………………………………...Page 34
  17. Relayed Circuit Breaker……………………………………………………………………Page 36
  18. R-Rated Motor-Starter Fuse………………………………………………………………..Page 38
  19. Transformer (Damage Curve) ……………………………………………………………..Page 39
  20. Low-Voltage Circuit Breaker*……………………………………………………………..Page 40
  21. Low-Voltage Fuse*………………………………………………………………………...Page 41
  22. UG Cable (Damage Curve) ………………………………………………………………..Page 42
  23. Bay-O-Net (Weak-Link) Fuse……………………………………………………………...Page 43
  24. User Provided (Import Data Points) ……………………………………………………….Page 44

 

Selection criteria for these devices will be described in the following sections.

 

* Low-voltage circuit breakers and low-voltage fuses appear in the device selection menu only if the previous device is a transformer. These are low-voltage devices (typically 0.48kV) and can only be connected to the secondary of a transformer.


S&C Fault Fiter® Electronic Power Fuse:

 

S&C Fault Fiter Electronic Power Fuses represent a major advancement in circuit-interruption technology through integration of state-of-the-art electronics with an advanced-design high-current fuse. Fault Fiter Electronic Power Fuses are ideal for protecting medium-voltage service-entrances, feeders, transformers, and underground distribution subloops. The data-entry fields for Fault Fiter vary depending on the type of control module selected.

 

 

The example shown above is for an Subloop-Type Fault Fiter control module. The number of selection fields varies based on the type; this example shows the most possible fields. They are:

 

1. Type:  Select the type of TCC curve.

2. Minimum PickUp:  Enter the minimum pickup current in Amperes.

3. Instantaneous PickUp:  Enter the instantaneous pickup current in Amperes.  Coordinaide may automatically select a value based on the minimum pickup you select.

4. Short-Time Delay:  Enter the short-time delay in seconds.  Coordinaide may automatically select a value based on the minimum pickup you select.

5. Short-Time PickUp:  Enter the short-time pickup current in Amperes.  Coordinaide may automatically select a value based on the minimum pickup you select.

 

Once the desired parameters have been selected, click Continue to move to the next device.


S&C Fault Tamer® Fuse Limiter:

 

The S&C Fault Tamer Fuse Limiter is specifically designed for protecting single- and three-phase transformers on overhead distribution circuits. Fault Tamer provides these features and benefits over traditional fuse cutouts, or cutouts used in combination with backup current-limiting fuses. They combine the functions of a conventional fuse cutout and a backup current-limiting fuse in one unit. The data-entry fields for Fault Tamer Fuse Limiters are shown on the next page.

 

 

There are four data-entry fields for Fault Tamer Fuse Limiters. They are:

 

  1. Speed: Select the desired speed (TCC) characteristic.
  2. Ampere Rating: Select the desired ampere rating.
  3. Preload Amps: This field allows you to account for the reduction in the Fault Tamer’s minimum-melting time due to the pre-fault load current. Enter the load on the fuse expressed as a percent of the Fault Tamer’s ampere rating. The default value is 0 amperes. See Note 2.
  4. Ambient Temperature Adjustment: This field allows you to account for the increase or decrease in Fault Tamer’s minimum-melting time due to high or low ambient temperatures. Enter the desired ambient temperature in degree Celsius. The default value is 25ºC (77ºF).

 

Note 1: When coordinating a Fault Tamer Fuse Limiter with a recloser, the adjustment for preload for the fault tamer is made when the recloser is selected. In this case, fields 3 and 4 will not appear. Once the desired parameters have been selected, click Continue to move to the next device.

Note 2: S&C Fault Tamer Fuse Limiters should not be loaded to currents in excess of their published continuous peak-load capabilities. Refer to S&C Data Bulletin 450-190.

 

Once the desired parameters have been selected, click Continue to move to the next device.


S&C Fusistor® Fuse:

 

The S&C Fusistor is an indoor power fuse that provides full-fault-spectrum protection for voltage, control-power and auxiliary-power transformers. The data-entry fields for Fusistor Fuses are shown below:

 

 

 

The Fusistor Fuse has only one data-entry field. Simply select the Ampere Rating from the list of available ratings.

 

Once the desired ampere rating has been selected, click Continue to move to the next screen.


S&C IntelliRupter® PulseCloser:

 

The S&C IntelliRupter PulseCloser is an overhead distribution protective device that is similar to a recloser.  It uses S&C’s evolutionary PulseClosing Technology to find and isolate faults without the disruptive effects associated with conventional reclosing.  Pulseclosing reduces stresses on your system and improves reliability.

 

IntelliRupter can be applied as a standalone fault interrupter . . . it can be applied in non-communicating loop restoration schemes . . . or it can be applied in advanced multiple-source communications-based automatic restoration systems.  A wide range of communications options let IntelliRupter interface with virtually any SCADA system.

 

IntelliRupter provides outstanding protection on both 50- and 60-Hz distribution systems.  It has a generous continuous-current rating of 800 amperes (with a 2-ft per second wind), and a fault-interrupting rating of 12,500 amperes symmetrical.  IntelliRupter is available with and without an integrated, interlocked disconnect for visible air-gap isolation.

 

IntelliRupter TCCs:  Unlike a fuse, which has a single TCC curve pair (minimum melt and total clear) or a relayed circuit breaker, which has two curve pairs (minimum trip and total clear for both the phase and ground elements), IntelliRupter can have up to 25 individual curve pairs (minimum trip and total clear) for a given protection profile and direction of current flow.  This means that you not only specify the parameters that define an individual TCC curve, you must also assign that TCC curve to a specific location in the array of TCC curves that make up a profile and direction.  For example, an Initial Trip (base curve), Phase Element TCC curve is distinctly different from a Test #3 Ground Element TCC curve, even though these two curves may have identical TCC curve parameters (minimum-trip currents, time multipliers, etc.).  The assignment of a TCC curve to a specific “location” in the profile and direction array in Coordinaide is done under the “General” section at the top of the IntelliRupter screen.  As a point of information, the profile and direction array is referred to as the “IntelliRupter PulseCloser SetPoints Group”.  It’s analogous to a library.

 

Once you have specified your first IntelliRupter TCC curve, you will click the “Draw/Redraw Graph” button or the “SAVE SetPoints,” button at which point Coordinaide will write the specified TCC curve data to the SetPoints Group.  Next, you can either view the SetPoints Group by clicking the “VIEW/LOAD SetPoints” button, or specify another IntelliRupter TCC curve by returning to the “General” section at the top of the IntelliRupter screen.  Note:  It is assumed that the second and additional IntelliRupter TCC curves are in the same protection profile and direction as the first TCC curve specified.  Accordingly, the selection fields for Profile and Direction are “grayed” out.  If you want to specify IntelliRupter TCC curves for a different profile and/or direction, you must either click the “Reset Profile and Clear SetPoints” button and start over, or load in a previously saved SetPoints Group.  When you do the latter, the profile and direction fields are available once again; in this way, you can copy TCC curves from one profile and direction to a different profile and direction.

 

An IntelliRupter TCC curve is defined by 22 unique parameters, even though some of the parameters do not affect the TCC curve.  You will be required to enter some of these parameters when specifying an IntelliRupter TCC curve; other parameters are stored in memory and do not have to be entered directly. 

 

S&C IntelliRupter® PulseCloser: — continued

 

The IntelliRupter PulseCloser SetPoints Group is readable by (e.g., uploaded to) the IntelliRupter control at the protection profile and direction level.  Accordingly, all parameters that make up a specific IntelliRupter TCC curve must be present.

 

Process for Specifying a Family of IntelliRupter TCC Curves:

 

  1. Specify the first TCC curve based on the desired Protection Profile, Direction, Initial Trip / Test Operation, etc.

 

  1. When finished, click the “Draw/Redraw Graph” button or the “SAVE SetPoints” button.  You can also click the “VIEW/LOAD SetPoints” button to see how the data is written to the SetPoints Group.  Click the “RETURN to TCC Page” button when you are ready.

 

  1. Specify the next IntelliRupter TCC curve for a different Initial Trip / Test operation for the same profile and direction.

 

  1. When finished, click the “SAVE SetPoints” button.  Repeat Steps 3 and 4 until all TCC curves have been specified.

 

  1. After you have specified the final IntelliRupter TCC curve, on the SetPoints Group Page, click the “Save SetPoints Group File (*.XDT)” button.  This file can be reloaded into Coordinaide at a later date and time for additional editing.

 

The various data entry fields for IntelliRupter are shown below.  There is a screen shot for each section, followed by a listing of the data-entry fields.

 

TCC Page

 

GENERAL

 

 


S&C IntelliRupter® PulseCloser: — continued

 

There is one “button” and five data-entry fields for the General section.  They are:

 

  • Reset Profile and Clear Settings Group:  “Clicking” this button will clear the protection profile and all specified IntelliRupter TCC curves.
  • Profile Name:   Enter Profile name (e.g., Winter, Storm).  Default is date and time.
  • Profile:  Select from List (e.g., General Profile #1).
  • Direction:  Select from List (e.g., Direction 1).
  • Initial Trip/Test Operation:  Select from List (e.g., Base or IFS).
  • Trip Element:  Select from List ( e.g., phase or ground).

 

Rules Specific to Intelligent Fuse Saving (IFS) Operations

1.   You must have an initial trip base curve (phase or ground) if you have an initial trip IFS curve (phase or ground).

2.   Initial trip IFS and initial trip Sequence Coordination operations are mutually exclusive.

3.   IFS phase and ground settings (ratings) must be the same.

 

INVERSE SEGMENT

 

 

There are eight data-entry fields for the Inverse Segment section.  They are:

 

  • Manufacturer:  Select from List (e.g., Cooper or SEL).
  • Inverse Curve Name:  Select from List (e.g., IEEE Very Inverse).
  • Minimum Trip Current, Amperes:  Enter value in amperes.
  • Low-Current Cutoff, Amperes:  Enter value in amperes.  The Low-Current Cutoff must be equal to or greater than the minimum trip current.
  • Time Multiplier:  Enter value  Note:  This is analogous to time dial.
  • Time Adder, Seconds:  Enter value in seconds.
  • Minimum Inverse Response Time, Seconds:  Enter value  Note:  Value must be greater than the computed time value of the inverse curve segment at 50 times the Minimum-Trip Current.

S&C IntelliRupter® PulseCloser: — continued

 

DEFINITE TIME

 

 

There are four data-entry fields for the Definite Time section.  They are:

 

  • Definite Time #1 Current, Amperes:  Enter value in amperes.
  • Definite Time #1 Time, Seconds:  Enter value in seconds.
  • Definite Time #2 Current, Amperes:  Enter value in amperes.  Note:  The Definite Time #2 Current must be greater than or equal to the Definite Time #1 Current.
  • Definite Time #2 Time, Seconds:  Enter value in seconds.  Note:  The Definite Time #2 Time must be less than or equal to Definite Time  #1 Time.

 

HIGH-CURRENT RESPONSE

 

 

There are two data-entry fields for the High Current Response section.  They are:

 

  • High-Current Lockout, Amperes:  (Check Box)  Note:  If enabled, IntelliRupter will operate “One Shot to Lockout” for currents at or above the specified current level.  The High-Current Lockout setting does not affect IntelliRupter’s TCC curve.
  • High-Current Cutoff, Amperes:  Not a user selectable parameter.  The High-Current Cutoff is fixed at 12,500 amperes for Base Curves; for IFS curves it varies based on the ampere rating and speed of the IFS curve.

 

RESET CHARACTERISTIC

 

 

There are two data-entry fields for the Reset Characteristics section.  They are:

 

 

S&C IntelliRupter® PulseCloser: — continued

 

  • Reset Response Type:  Select “Electro-Mechanical” or “Definite Time,” as desired.
  • Reset Time:  Enter value in seconds.

 

NOTE: The default reset type and time for each inverse curve segment is shown.

 

 

PLOT OPTIONS

 

 

There is only one data-entry field for the Plot Options section.  It is:

 

  • Modify Inverse Curve Segment?  Yes / No  Note:  If you select “Yes”, you will be given an opportunity to enter your own inverse curve segment parameters (A, B, C, p, and K).

 

GRAPH / SETPOINTS COMMANDS (beneath Plot Options)

 

 

  • CONTINUE:  Clicking this button directs you to the next device.

 

  • DRAW/REDRAW Graph:  Clicking this button writes the specified IntelliRupter TCC curve data to the SetPoints Group and draws the TCC curve.  It will not direct you to the next device.

 

  • SAVE SetPoints:  Clicking this button writes the specified IntelliRupter TCC curve data to the SetPoints Group and draws the TCC curve.  Note:  Coordinaide can save up to 25 unique TCC curves for a single protection profile and direction.

 

  • VIEW/LOAD SetPoints:  Clicking this button directs you the SetPoints Group Page.  It does not write the specified IntelliRupter TCC curve data to the SetPoints Group or draw the TCC curve.

 


S&C IntelliRupter® PulseCloser: — continued

 

Settings Group File Page

 

Top and Center of Page

 

 

  • Return to TCC (Page):  “Clicking” this button will direct you back to the TCC Page.

 

  • Go to Page Bottom:  “Clicking” this button will bring you to the bottom of the page.

 

For each specific IntelliRupter TCC curve (of the 20 possible curves for the specified protection profile and direction), there are two buttons and two check boxes that let you control the individual TCC curves, as follows:

 

  • Edit:  “Clicking” the “Edit” button loads selection parameters for the desired IntelliRupter TCC curve into the appropriate fields on the TCC Page.  Click on the “RETURN to TCC” to edit the TCC curve.

 

  • Delete:  “Clicking” the “Clear” button erases all of the selection parameters for the specified IntelliRupter TCC curve.

 

  • Active:  (Check Box)  Note:  It is assumed that the IntelliRupter TCC curve is instantiated (active) since it has been written to the SetPoints Group.  “Clicking” this check box is a quick way to deselect or inactivate a specified IntelliRupter TCC curve.

 

  • Plot:  (Check Box)  Note:  If more than just a few IntelliRupter TCC curves are plotted at the same time, the TCC plot will quickly become difficult to read.  “Clicking” this check box is a quick way to remove certain TCC curves from the TCC plot.  Typically you would plot all of the phase element TCC curves together to check coordination.  Then you would plot all of the ground element TCC curves together to check coordination.  Other combinations are equally useful, for example, you might want to plot all of the initial trip curves together followed by the various test curves.

 

Bottom of Page

 

One check box and two radio buttons allow you to control groups of TCC curves.  These are:

 

 

 

  • Plot All TCCs (Check ALL):  (Radio Button)  When this radio button is selected, all “active” TCC curves will be plotted.  It is used to manage large numbers of TCC curves, in essence you would use this feature to re-plot TCC curves that had been deselected previously.

 

  • Clear All TCCs (Uncheck ALL):  (Radio Button)  When this radio button is selected, all “active” TCC curve plots will be suppressed.  It is used to manage large numbers of TCC curves, in essence you would use this feature to suppress all of the TCC curves that had been plotted previously, and then you would individually select only certain TCC curves to plot.

 

The four command buttons at the bottom of the IntelliRupter PulseCloser SetPoints Group page are described as follows:

 


 

  • RETURN to TCC (Page):  “Clicking” this button will direct you back to the TCC Page.

 

  • Go to Page Top:  “Clicking” this buttom will direct you to the top of the page.

 

  • SAVE SetPoints Group File (*.XDT):  “Clicking” this button allows you to save the IntelliRupter PulseCloser SetPoints Group to a file that can be loaded into the IntelliRupter control.  It can also be loaded into Coordinaide at a later date and time for additional editing.

 

  • SAVE as Table (*.TSV):  “Clicking” this button allows you to save the IntelliRupter PulseCloser SetPoints Group to a “tab-separated-variable” file that can be opened in EXCEL.

 

  • LOAD SetPoints Group File (*.XDT):  “Clicking” this button allows you to load into Coordinaide an IntelliRupter PulseCloser SetPoints Group file that has been previously saved.  Use the “Browse . . . “ button to locate the appropriate file first.  Then click the LOAD SetPoints Group File (*.XDT) button.  If the SetPoints Group file contains TCC curve data for more than one profile/direction, a drop down list will appear.  Select the desired profile/direction you wish to edit in Coordinaide and it will load automatically.

 

Once the desired parameters have been selected, click Continue to move to the next device.


S&C TripSaver™ Dropout Recloser:

 

The S&C TripSaver Dropout Recloser is a unique new product for protecting overhead lateral circuits. Used in lieu of a fuse cutout, it improves system reliability by eliminating permanent outages that result when lateral fuses respond to temporary faults. It is ideally suited for protection of laterals that experience frequent momentary faults. This self-powered, electronically-controlled, single-phase vacuum fault interrupter is available for installation in new or existing cutout mountings. The data-entry fields for TripSaver Dropout Reclosers are shown below:

 

 

 

 

The TripSaver Dropout Recloser has only one data-entry field, with six available options:

 

  1. 30K (60Hz)
  2. 30K (50Hz)
  3. 50K (60Hz)
  4. 50K (50Hz)
  5. 100K (60Hz)
  6. 100K (50Hz)

 

Once the desired ampere rating has been selected, click Continue to move to the next screen.


S&C Vista® Switchgear (Standard Curves):

 

Vista Underground Distribution Switchgear is available in manual, remote supervisory, and source-transfer models. All models feature load-interrupter switches and re-settable, vacuum fault interrupters or arc spinners in series with disconnect switches, elbow-connected and enclosed in a submersible, SF6-insulated, welded steel tank. Vista UDS is available with up to six “ways,” in ratings through 38 kV and 25 kA symmetrical short-circuit. Large windows in the tank provide a clear view of the open gap, ground position, and ground bus. In Coordinaide, Vista TCC curves are available in two categories – standard curves and IEC & US relay curves. The data-entry fields for Vista Switchgear (Standard Curves) are shown below.

 

 

There are five data-entry fields for the Vista Switchgear Standard Curves. They are:

 

  1. Curve Family: Select one of the four available families.
  2. Curve Attributes: Select among Instantaneous, Definite Time, Instantaneous and Definite Time, or none.
  3. Definite Time Delay: Select the desired definite-time delay, in cycles.
  4. Instantaneous Trip: Select the desired instantaneous-tripping current in kilo-amperes.
  5. Rating: Select the minimum-pickup.

 

Once the desired ratings and settings have been selected, click Continue to move to the next device.


S&C Vista® Switchgear (IEC & US Relays):

 

The Vista Switchgear has the IEC and US curves built into it. These are generated with the following formula:

 

 

where:

A, B, C, and p are essentially curve-fitting constants (not user settable)

I = fault current

I_min_trip = minimum trip current

TM = time multiplier (time dial setting)

TA = time adder

 

The data-entry field for Vista Switchgear (IEC & US Curves) are shown below.

 

 

 

 

 

S&C Vista® Switchgear (IEC & US Relays): — continued

 

The selection options for Phase Trip and Ground Trip elements are identical. There are seven data-entry fields for Vista Switchgear (IEC and US curves). They are:

 

  1. Phase/Ground Relay: Select the desired relay curve family (C1-C5 or U1-U5).
  2. Relay Type: Select the desired relay type (C3 Extremely Inverse, etc).
  3. Minimum-Pickup Current, Amperes: Enter the minimum-pickup current value in amperes.
  4. Instantaneous-Pickup Current, Amperes: Enter the desired instantaneous-pickup current, or leave blank.
  5. Phase Time-Dial Setting: Enter the time-dial multiplier for the relay curve. Coordinaide will automatically interpolate between defined curves to plot intermediate time-dials.
  6. Breaker Clearing Time in Seconds: Enter the clearing time for the circuit breaker. Default range is 0 to 1000 seconds. Leave blank if you are doing load-side coordination.
  7. Current Tolerances: This field allows you to specify current tolerances in terms of percent of current.  Tolerances vary among manufacturers.
  8. Time Tolerances: This field allows you to specify time tolerances in terms of either percent of time or a fixed time value.  For Fixed Time (CTI), enter a positive value to create negative tolerance.

 

 

Once the desired ratings and settings have been selected, click Continue to move to the next device.


Capacitor Unit (Case-Rupture Curves):

 

The data-entry fields for capacitor units are shown below:

 

 

 

There are three data-entry fields for capacitor units. They are:

 

  1. Manufacturer: Select the desired manufacturer.
  2. Dielectric: Select the desired dielectric material.
  3. Rating: Select the desired kVAR rating of the capacitor unit.

 

Once the desired parameters have been selected, click Continue to move to the next device.


Current-Limiting Fuse:

 

A current-limiting fuse is a special type of fuse that, when it operates, introduces a high resistance into the circuit to limit the energy “let through” into the equipment during the fault. The data-entry fields for current-limiting fuses are shown below:

 

 

There are five data-entry fields for current-limiting fuses. They are:

 

  1. Manufacturer: Select the desired manufacturer.
  2. Type: Select the type of fuse.
  3. kV Range: Select the appropriate kV range.
  4. Ampere Rating: Select the desired ampere rating.
  5. Include 25% Setback Allowance?: This field allows you to apply a 25% setback allowance, in terms of time, to the minimum-melting curve.

 

Once the desired parameters have been selected, click Continue to move to the next device.


Fuse Link:

 

Distribution fuse links are used in overhead distribution fuse cutouts, and are available in a wide variety of speed characteristics designed to optimize both device protection and coordination. The data-entry fields for fuse links are shown on the following page:

 

 

There are five data-entry fields for fuse links. They are:

 

  1. Manufacturer: Select the desired manufacturer.
  2. Speed: Select the desired speed (TCC) characteristic.
  3. Ampere Rating: Select the desired ampere rating.
  4. Preload Amps: This field allows you to account for the reduction in the fuse link’s minimum-melting time due to the pre-fault load current. Enter the load on the fuse expressed as a percent of the fuse link’s ampere rating. The default value is 0 amperes.
  5. Ambient Temperature Adjustment: This field allows you to account for the increase or decrease in fuse link’s minimum-melting time due to high or low ambient temperatures. Enter the desired ambient temperature in degree Celsius. The default value is 25ºC (77ºF).

 

Once the desired parameters have been selected, click Continue to move to the next device.

 

Note 1: Specific preload and ambient-temperature adjustments apply only to S&C Positrol Fuse Links. For other fuse links you have the opportunity to apply a 25% setback allowance, in terms of time, to the minimum-melting curve.

Note 2: S&C Positrol Fuse Links should not be loaded to currents in excess of their published continuous peak-load capabilities. Refer to S&C Data Bulletin 350-190.

 


Incident-Arc Energy Curve:

 

When this device is selected, Coordinaide will develop incident-arc-energy curves for various PPE levels (from 1 – 4) using either the empirical (1 < kV < 15) or theoretical (kV > 15) methods found in Annex D to NFPA–70E (Electrical Safety in the Workplace).  Both methodologies are described below.

 

Empirical Method Equations

 

0 < kV ≤ 1

1 < kV ≤ 15

Arcing Current

lg Ia = K + 0.662(lg Ibf) + 0.0966V + 0.000526G + 0.5588V(lg Ibf) – 0.00304G (lg Ibf)

Normalized Incident Energy

Time

 

Theoretical Method Equation

 

Time:   


where:

 

Cf = 1.0 for voltages above 1 kV; 1.5 for voltages at or below 1 kV

System Voltage (kV)

Type of Equipment

Typical Conductor Gap (mm)

Distance X-Factor

0.208-1

Open-air

10-40

2.000

Switchgear

32

1.473

MCCs and panels

25

1.641

Cables

13

2.000

>1-5

Open-air

102

2.000

Switchgear

13-102

0.973

Cables

13

2.000

>5-15

Open-air

13-153

2.000

Switchgear

153

0.973

Cables

13

2.000

D = working distance (mm) from the arc to the person

E = incident energy (based on PPE level)

En = incident energy normalized for time

and distance

G = conductor gap in mm (see table to right)

Ia = arcing current in kA


Ibf = bolted three-phase available fault current

in kA

K = -0.153 for open air arcs; -0.097 for arcs-in-a-box (i.e., for Switchgear)

k1 = -0.792 for open air arcs; -0.555 for arcs-in-a-box (i.e., for Switchgear)

k2 = 0 for ungrounded and high resistance systems; -0.113 for grounded systems

t = arcing time in seconds

V = system voltage in kV

X = distance exponent (see table to right)

 

 

 

 

 

 

 

 


Incident-Arc Energy Curve: — continued

 

The data-entry fields for incident-arc energy curves are shown below.

 

 

There are seven data-entry fields for incident-arc energy curves. They are:

 

  1. System Voltage: Select the desired system voltage.
  2. Type of Equipment: Select the type of equipment under consideration.
  3. System Grounding: Select whether the system is grounded or ungrounded.
  4. Method: Select the desired calculation method.
  5. Conductor Gap (inches): Enter the conductor phase spacing in inches.
  6. Working Distance (inches): Enter the working distance, also in inches.
  7. PPE Level: Select the desired PPE Level for the arc-energy curve.

 

Once the desired parameters have been selected, click Continue to move to the next device.


Motor (Generic Starting Curve):

 

When this device is selected, Coordinaide will develop a generic motor-starting curve based on the specifications of the motor. The data entry fields for a generic motor starting curve are shown below:

 

Based upon the parameters selected, Coordinaide will develop a generic motor-starting curve. The default values are for a 2500 hP motor, with a locked-rotor multiplier of 6, and a 6-second acceleration time.

 

Once the desired parameters have been selected, click Continue to move to the next device.


Overhead (OH) Conductor (Damage Curve):

 

When this device is selected, Coordinaide will develop an industry recognized conductor damage curve based on the material and the size of the conductor selected.  Coordinaide utilizes three different methods of determining damage curves, all of which are shown in the table below.

 

O/H Conductor Damage Curve Equations

Curve Type

Soares Annealing Curve Using 1 Ampere per 30 Circular Mils for 5 Seconds (for Copper conductors only)

Onderdonk Melting Curve (for Copper conductors only)

Aluminum Association Method (for Aluminum and A.C.S.R. conductors)

Equation

Source

Grounding Electrical Systems for Safety, Eustice Soares

Standard Handbook for Electrical Engineers

Aluminum Electrical Conductor Handbook

 

where:

CM = conductor area in Circular Mils

I = fault current

t = time of fault current

To = rated insulation operating temperature limit

Tf  = rated maximum insulation short circuit temperature limit

 

The data-entry fields for an overhead conductor are shown below.

 

 

 

There are two data-entry fields for Overhead Conductor Damage Curves. They are:

 

  1. Conductor Type: This field allows you to select the conductor material.
  2. Size: This field allows you to select the size of the conductor.

 

Once the desired parameters have been selected, click Continue to move to the next device.

Power Fuse:

 

Power Fuses provide reliable and economical full-fault-spectrum protection for transformers and capacitor banks in utility and industrial substations. They are one of the most widely deployed devices in the electric power industry. The data-entry fields for power fuses are shown below:

 

 

 

There are seven data-entry fields for power fuses. They are:

 

  1. Manufacturer: Select the desired manufacturer.
  2. Type: Select the desired type of fuse.
  3. Speed: Select the desired speed (TCC) characteristic.
  4. kV Range: Select the desired voltage range of the fuse.
  5. Ampere Rating: Select the desired ampere rating.
  6. Preload Amps: This field allows you to account for the reduction in the power fuse’s minimum-melting time due to the pre-fault load current. Enter the load on the fuse expressed as a percent of the fuse’s ampere rating. The default value is 0 amperes.
  7. Ambient Temperature Adjustment: This field allows you to account for the increase or decrease in power fuse’s minimum-melting time due to high or low ambient temperatures. Enter the desired ambient temperature in degree Celsius. The default value is 25ºC (77ºF).

 

Note 1: Specific preload and ambient temperature adjustments apply only to S&C Power Fuses. For other power fuses you have the opportunity to apply a 25% setback allowance, in terms of time, to the minimum-melting curve.

Note 2: S&C power fuses should not be loaded to currents in excess of their published continuous peak-load capabilities. Refer to the following S&C data bulletins:

 

·        210-190 (SMD Power Fuses)

·        240-190 (SM, SML, SMD-20 and SMD-40 Power Fuses)

 

 

Recloser Point-Based (Hydraulic, Elec Controls):

 

A recloser is a specialized device designed to clear a temporary fault through its various trip operations without causing other permanent damage, but can electrically ‘open’ a part of the system in case of a permanent fault, thereby keeping the outage to the shortest possible time.  The term “Point-Based” means that these recloser curves come from point-to-point data rather than a formula.  The data entry fields for point-based reclosers are shown below:

 

 

 

The data entry fields for Phase and Ground are identical.  “Manufacturer” and “Type” must be the same for Phase and Ground; therefore, once you have selected a “Type” for one trip element (either phase and ground), these data entry fields become “grayed out” for the other trip element.

 

The fields are explained below:

 

  1. Manufacturer: Select the manufacturer of the recloser you wish to coordinate.
  2. Type: Select the specific type of recloser from the manufacturer chosen.
  3. Fast Curve: This field allows you to select the “fast” operation. This field is organized in the following manner: [Name- (Number)]. In certain cases, there may be more than one curve with the same name. In these cases the curve number will be different.
  4. Recloser Clearing Time:  This field allows you to account for recloser clearing time.  Curves are plotted as a band: this fixed time is added to the max curve.
  5. Current Tolerances: This field allows you to specify current tolerances in terms of percent of current.  Tolerances vary among manufacturers.
  6. Time Tolerances: This field allows you to specify time tolerances in terms of either percent of time or a fixed time value.  For Fixed Time (CTI), enter a positive value to create negative tolerance.
  7. Slow Curve: This field allows you to select the “slow” operation.
  8. Min. Trip Amps (or Coil Rating):  Enter the minimum trip current (for electronically controlled reclosers) or the coil rating (hydraulic controls).

 

Note: After any Coordinaide analysis that involves a recloser, you should clear all the fields using the ‘Clear All Fields’ option on the General Information Screen.

 

Once the desired ratings and settings have been selected, click Continue to move to the next device.

 

Recloser Equation-Based (Microprocessor Control):

 

A recloser is a specialized device designed to clear a temporary fault through its various trip operations without causing other permanent damage, but can electrically ‘open’ a part of the system in case of a permanent fault, thereby keeping the outage to the shortest possible time.  These reclosers utilize a microprocessor control, which means curves are based on a formula rather than point-to-point data.

 

The data entry fields for equation-based controllers are shown below.

 

 


The data entry fields for phase and ground are identical.  The manufacturer must be the same for both phase and ground trip elements; therefore, once you have selected a manufacturer for a particular trip element, the manufacturer field will be “grayed out” for the opposite trip element.  The fields are explained below:

 

  1. Manufacturer: Select the manufacturer of the recloser you wish to coordinate.
  2. Min. Trip Current: Enter the minimum trip current.
  3. Fast Curve: This field allows you to select the “fast” operation. This field is organized in the following manner: [Name- (Number)]. In certain cases, there may be more than one curve with the same name. In these cases the curve number will be different.
  4. Time Multiplier:  Enter the time-dial multiplier for the selected curve.  Coordinaide will automatically interpolate between defined curves to plot intermediate time-dials.
  5. Time Adder:  Enter time in seconds.
  6. Min. Response Time:  Enter the minimum response time.  If left blank, Coordinaide will populate this field with an appropriate default value upon plotting.
  7. High Current Trip:  Enter a high current cutoff point at which the recloser will trip no matter what.
  8. Recloser Clearing Time:  This field allows you to account for recloser clearing time.  Curves are plotted with +/- tolerances: this fixed time is added to the max curve.  Default value is .04167 seconds.
  9. Current Tolerances: This field allows you to specify current tolerances in terms of percent of current.  Tolerances vary among manufacturers.
  10. Time Tolerances: This field allows you to specify time tolerances in terms of either percent of time or a fixed time value.  For Fixed Time (CTI) tolerance, enter a positive value to create negative tolerance.
  11. Slow Curve: This field allows you to select the “slow” operation.

 

Note: After any Coordinaide analysis that involves a recloser, you should clear all the fields using the ‘Clear All Fields’ option on the General Information Screen.

 

Once the desired ratings and settings have been selected, click Continue to move to the next device.

 

Relayed Circuit Breaker:

 

 

The Coordinaide database contains TCC curves for a large variety of relay manufacturers; from legacy Westinghouse ‘CO’ and GE ‘IFC’ curves to the new microprocessor based ‘IEC’ and ‘US’ curves.  Some Relayed Circuit Breaker TCC curves have been digitized, while others are generated using the following formula:

 

where:

A, B, C, p, and K are essentially curve-fitting constants (not user settable)

I = fault current

I_min_trip = minimum trip current

TM = time multiplier (time dial setting)

TA = time adder

 

The data-entry fields for relayed circuit breakers are shown below:

 

 

 

 

 

 

Relayed Circuit Breaker: — continued

 

The selection options for Phase Relay and Ground Relay elements are identical. There are nine data-entry fields for relayed circuit breakers. They are:

 

  1. Manufacturer: Select the desired manufacturer.
  2. Relay Type: Select the desired relay characteristic. (e.g. Inverse, Very Inverse).
  3. Minimum-Pickup Current, Amperes: Enter the desired minimum-pickup current value in amperes.
  4. Instantaneous-Pickup Current: Enter the desired instantaneous-pickup current, or leave blank.
  5. Phase Time-Dial Setting: Enter the time-dial multiplier for the relay curve. Coordinaide will automatically interpolate between defined curves to plot intermediate time-dials. Although the time-dial historically ranged from 0.5 – 11, some of the newer electronic relays can have time-dial ranges from 0 – 99 (Basler) of from .05 – 1.1 (IEC).
  6. Breaker Clearing Time: Enter the clearing time for the circuit breaker. Default range is 0 to 1000 seconds. Leave blank if you are doing load-side coordination.
  7. Current Tolerances: This field allows you to specify current tolerances in terms of percent of current.  Tolerances vary among manufacturers.
  8. Time Tolerances: This field allows you to specify time tolerances in terms of either percent of time or a fixed time value.  For Fixed Time (CTI), enter a positive value to create negative tolerance.

 

 

Once the desired ratings and settings have been selected, click Continue to move to the next device.


R-Rated Motor-Starter Fuse:

 

An R-rated motor starter fuse is a partial range current-limiting fuse used in Class E-2 Industrial Control Equipment (i.e. fused motor starters). The data entry fields for R-rated motor starter fuses are shown below:

 

There are five data-entry fields for R-rated motor-starter fuses. They are:

 

  1. Manufacturer: Select the desired manufacturer.
  2. Speed: The default speed is R.
  3. kV Range: Select the desired voltage range.
  4. Ampere Rating: Select the desired ampere rating.
  5. Include 25% Setback Allowance?: This field allows you to apply a 25% setback allowance in terms of time to the minimum-melting curve.

 

Once the desired parameters have been selected, click Continue to move to the next device.


Transformer (Damage Curve):

 

When this device is selected, Coordinaide will develop a generic damage curve for a transformer based up on the primary and secondary voltages, kVA rating, percent impedance, and the connection. The data-entry fields for transformer damage curves are shown below:

 

 

There are seven data-entry fields for transformer damage curves. They are:

 

  1. 3-Phase Primary kV: This is the primary-side voltage of the transformer. The default value is the system voltage entered on the General Information screen.
  2. 3-Phase Secondary kV: This is the secondary-side voltage. Note that the secondary voltage is also expressed in kilovolts (kV). To enter a voltage smaller than 1kV, use a decimal (i.e., 480 volts = 0.48 kV).
  3. 3-Phase Rating kVA: Enter the power rating (kVA) of the transformer.
  4. Impedance: Enter the transformer’s impedance in percent.
  5. Fault Current: Coordinaide defaults to the available fault current entered on the General Information screen.
  6. Display magnetizing-inrush points?: This field allows you to choose whether or not to show the industry ‘rule-of-thumb’ magnetizing inrush points.
  7. Connection: Select the desired transformer connection (e.g. Delta-Gnd.Y, Delta-Delta, Gnd.Y-Gnd.Y).

 

Once the desired parameters have been selected, click Continue to move to the next device.


Low-Voltage Circuit Breaker:

 

The low-voltage circuit-breaker only appears in the device list if the previous device is a transformer. The data-entry fields for low-voltage circuit breakers are shown below:

 

 

The selection options for a feeder circuit breaker and a main circuit breaker are identical. There are four data-entry fields for low-voltage circuit breakers. They are:

 

1.      Manufacturer: Select the desired manufacturer.

2.      Minimum-Pickup Current: Enter the desired minimum-pickup current expressed as a percent of the primary full-load current. The primary full-load current is displayed in parenthesis.

3.      Short-Time Pickup Multiplier: Select the desired short-time pickup multiplier.

4.      Short-Time Delay Band: Select the desired short-time delay band.

 

Once the desired parameters have been selected, click Continue to move to the next device.

 

 


Low-Voltage Fuse:

The low-voltage fuse only appears in the device list if the previous device is a transformer. The data-entry fields for low-voltage fuses are shown below:

 

 

The selection options for a feeder fuse and a main fuse are identical. There are three data-entry fields for low-voltage fuses. They are:

 

  1. Manufacturer: Select the desired manufacturer.
  2. Type: Select the desired fuse type (e.g. KTU, KRP-C).
  3. Ampere Rating: Select the desired ampere rating.

 

Once the desired parameters have been selected, click Continue to move to the next device.


Underground (UG) Cable (Damage Curve):

 

When this device is selected, Coordinaide will develop a cable damage curve based on the conductor type, the insulation material and the size. The formulas used are from IEEE Std. 242 and are shown here:

 

Cable Damage Curve Formulas

Copper

Aluminum

 

where:

CM = conductor area in Circular Mils

To = rated insulation operating temperature limit

I = fault current

Tf = rated maximum insulation short circuit temperature limit

tFac = time of short circuit

 

 

The data-entry fields for underground cable damage curves are shown below:

 

 

There are three data-entry fields for Underground Cable Damage Curves. They are:

 

  1. Conductor Type: Select the conductor material. Available options are aluminum and copper.
  2. Insulation: Select the insulation material and the corresponding minimum and maximum temperature ranges.
  3. Size: Select the size of the conductor.

 

Once the desired parameters have been selected, click Continue to move to the next device.


Bay-O-Net (Weak Link) Fuse:

 

A Bay-O-Net fuse (also known as the ‘weak-link’ fuse) is a special type of under-oil fuse that is used in pad mounted transformers. The data-entry fields for Bay-O-Net weak-link fuses are shown below:

 

 

There are four data-entry fields for Bay-O-Net (weak-link) fuses. They are:

 

  1. Manufacturer: Select the desired manufacturer.
  2. Speed: Select the desired speed (TCC) characteristics.
  3. Ampere Rating: Select the desired ampere rating for the fuse.
  4. Include 25% Setback Allowance?: This field allows you to apply a 25% setback allowance, in terms of time, to the minimum-melting curve.

 

Once the desired parameters have been selected, click Continue to move to the next device.


User Provided (Import Data Points):

 

This screen allows you to plot a TCC curve from a set of time-current data points that are not available in Coordinaide’s database. The data-entry fields for the User Provided Data Points option are shown below:

 

The three fields on this screen perform the following operations:

 

  1. Description: Use this field to enter information about the curve, viz., the device, manufacturer, ratings, etc.
  2. Min. Melt Curve: Copy and paste the data points for the minimum-melting curve into this field. The data should be arranged in the format [amps, seconds]. It is best suited that the data be first arranged in a comma-separated variable (*.csv) or an EXCEL (*.xls) file and then copied and pasted into the box above. It is also important to arrange the data such that when reading from the top down, the current values decrease and the time values increase.
  3. Tot. Clear Curve: Copy and paste the data points for the total-clearing curve in this field. The data should be arranged in the format [amps, seconds]. It is best suited that the data be first arranged in a comma separated variable (*.csv) or an EXCEL (*.xls) file and then copied and pasted into the box above. It is also important to arrange the data such that going top down, the current values decrease, and the time values increase.
  4. Dot Plot Option:  If this box is checked, Coordinaide will plot a square dot at each data point, instead of a curve.

 

 

 

 

 

User Provided (Import Data Points): — continued

 

Helpful tips for this screen:

 

·        Use the Clear “XXXXXXX” Data button below each text box to make sure that all previously entered data points have been properly deleted.

·        If there is only one curve or data point (i.e. no separate minimum-melt and total-clearing curves), paste the same data in both data-entry fields. Do not leave either one of the two fields blank.

 

Once all of the required information has been provided, click Continue to move to the next device.


Results Screen

 

The Results Screen is shown below:

 

 

 

The ‘Results’ screen is divided into four parts:

 

·        Navigation Bar

·        Plot/Export Options

·        TCC Graph

·        Summary

 

Navigation Bar

 

At the very top of the screen is the navigation bar with six options:

 

General Information

Screen to enter the general information for the analysis.

Device #1

Selection criteria for the first device.

Device #2

Selection criteria for the second device.

Device #3

Selection criteria for the third device.

Device #4

Selection criteria for the fourth device.

Results

The screen you are currently on.

 

Use the Navigation Bar to move between the different screens.

 

Plot/Export Options:

 

The entry fields on the Results screen allow you to change how the TCC graph is displayed, to export data points, or to export and save the entire analysis. The fields are:

 

  1. SCALE: The scale option allows you to change the current scale (X-axis) of the graph to 0.5 – 10,000 amperes from the default scale which is 5 – 100,000 amperes. To change the scale, select the second radio button, labeled ‘0.5 to 10,000’, and then click on Draw/Redraw Graph. The graph will be re-plotted with the new scale. If a different scale is desired for the X or the Y axes, use the ZOOM function.

 

  1. VIEW: This option allows you to maintain or remove the ‘hash’ fill between the curves. It is often helpful to remove the hash fill in cases where the precise intersection point between two curves needs to be observed. Simply check or uncheck the box and click Draw/Redraw Graph.

 

  1. ZOOM: This feature allows you to zoom into or out of the TCC graph. It can also be used to assign a custom scale to the graph. Enter the starting and ending currents and starting and ending times and click Draw/Redraw Graph to plot the TCC graph with the new scale.

 

  1. DIRECT DATA READOUT: To identify a specific point on the TCC graph, place the cursor over that point and single click your mouse. The time and current values at the cursor’s position will appear on the right, just below the ‘Results’ tab on the navigation bar.

 

 

  1. EXPORT DATA POINTS: Use this function to extract the data points for any curve plotted on the TCC graph and save them to a *.tsv (tab-separated value) file, which you can open in EXCEL. Use the drop-down menu to select the device number for which you want the data points and then click ‘SAVE Data Points File (*.TSV)’.

 

For Fuses, the column headings are defined as follows:

 

1

2

3

4

Minimum Melt

Total Clear

Current

Time

Current

Time

 

However, if the device has a single curve (e.g., capacitor unit), then the TCC data in the first two columns will be repeated in the third and fourth column.

 

For Reclosers, the column headings are defined as follows:

 

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Phase Trip Element

Ground Trip Element

Fast Curve

Slow Curve

Fast Curve

Slow Curve

Tot. Clear

Min. Trip

Tot. Clear

Min. Trip

Tot. Clear

Min. Trip

Tot. Clear

Min. Trip

I

T

I

T

I

T

I

T

I

T

I

T

I

T

I

T

 

 

For Relayed Circuit Breakers, the column headings are defined as follows:

 

1

2

3

4

5

6

7

8

Phase Trip

Ground Trip

Minimum Trip

Total Clear

Minimum Trip

Total Clear

I

T

I

T

I

T

I

T

 

 

The TCC data file can be saved, and used later to import the same curve using the ‘User Provided’ device screen.

 

 

  1. EXPORT APPLICATION: This feature allows you to export all of the ratings and settings for a given analysis. The same information can then be used in the ‘Import Selected Settings File’ feature available on the General Information screen and Coordinaide will reconstruct the same set of devices with the same ratings and settings. To export an application, click on ‘Save Recallable Settings File (*.APP)’.

 

  1. PRINTER FRIENDLY GRAPH: This will bring up an 8 ½” X 11” image of the TCC graph, suitable for printing. Use the browser’s print function to print the graph. To go back to the Results screen, use the browser’s back button or the navigation bar.

 

  1. PRINTER FRIENDLY SUMMARY: This selection button will bring up a display with settings for the devices on a separate 8 ½” X 11” sheet. Use the browser’s print function to print the graph. To go back to the Results screen, click on Results on the navigation bar.

 

  1. RETURN TO GENERAL INFO: This button is simply a shortcut back to the General Information screen.

TCC Graph:

All the curves for the device(s) should appear on the graph in different colors for the different devices. Click on any point on the graph to read out the current and time values at that point.

 

Summary:

The initial three sections of the Summary are similar in to those described on the General Information screen. In addition, the summary on the Results screen has links to the S&C products.

 

S&C Product Links: If any of the selected devices are manufactured by S&C Electric Company, a link to that product on the S&C website (www.sandc.com) will appear in this section. To view information on a particular product, click on the link and a new window will open.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S&C ELECTIC COMPANY

6601 North Ridge Boulevard
ChicagoIllinois  60626-3997