OPERATING INSTRUCTIONS for the CT-7000 Digital Circuit Breaker Analyzer Vanguard Instruments Company 1710 Grevillea Court Ontario, California 91761 TEL: (909) 923-9390 FAX: (909) 923-9391 October 2003 Rev 3
CT-7000 Operating Instructions SAFETY WARNINGS AND CAUTIONS Only trained operators shall use the device. All circuit breakers under test shall be off line and fully isolated. DO NOT SERVICE OR TEST ALONE Do not perform test procedures or service unless another person is also present who is capable of rendering aid and resuscitation.
CT-7000 Operating Instructions Table of Contents 1.0 Introduction .................................................................................................................................1 2.0 CT-7000 Description ..................................................................................................................1 2.1 Contact Timing Channels ..............................................................................................2 2.2 Analog Voltage Monitoring Channel..............
CT-7000 Operating Instructions 9.2 Get Tabulated Timing Results Using the Thermal Printer ...........................................25 9.2.1 Tabulated Results Interpretation ...............................................................................27 9.3 Get Graphic Timing Results Using the Thermal Printer ..............................................29 9.4 Save Timing Shots in the EEPROM............................................................................36 9.
CT-7000 Operating Instructions List of Figures Figure 1.0 CT-7000 Control Panel ..................................................................................................6 Figure 2.0 Contact Cable Connection...........................................................................................12 Figure 3.0 Series Contact Cable Connection ...............................................................................13 Figure 4.0 DC Trip and DC Close, Initiate Circuit Cable Hook-Up ..............
CT-7000 Operating Instructions List of Tables Table 1.0 CT-7000 Controls and Displays ......................................................................................7 Table 2.0 CT-7000 Cable set ..........................................................................................................9 Table 3.0 Voltage Selection Jumper Setting .................................................................................10 Table 4.0 Open Operation With No Insertion Resistors ......................
CT-7000 Operating Instructions Appendix APPENDIX A APPENDIX B APPENDIX C APPENDIX D APPENDIX E APPENDIX F APPENDIX G APPENDIX H APPENDIX I ITE Circuit Breaker model 14.4K Timing Chart .....................................................66 CLOSE-OPEN Timing Chart for ITE Circuit Breaker Model 14.4K.......................67 CLOSE-OPEN Tabulated Report for ITE Circuit Breaker Model 14.4K................68 OPEN-CLOSE Timing Chart for ITE Circuit Breaker Model 14.4K.......................
CT-7000 Operating Instructions 1.0 Introduction The CT-7000 is a microprocessor-based, digital time travel, circuit breaker analyzer. The CT7000 can fully analyze a utility circuit breaker’s performance by measuring: the contact time, stroke, velocity, over-travel, bounce-back and contact wipe. The contact motion analysis includes: Open, Close, Open-Close, Close-Open and OpenClose-Open operations. A timing window is selectable between one second, ten second and twenty second periods.
CT-7000 Operating Instructions The CT-7000 can also store up to 100 breaker timing test records and 99 breaker test-plans into the FLASH EEPROM. Stored timing records can be recalled, printed or transferred to a personal computer. Using the breaker test plan with a timing test, the users do not have to set the velocity calculating points. The test report will also print “PASS” and “FAIL” results. 2.1 Contact Timing Channels A breaker's interruption of contacts is timed with the dry-contact input channels.
CT-7000 Operating Instructions personal computer. A Windows-based Breaker Analysis Software is supplied with each CT-7000. The software is compatible with Windows 95, 98, Me, 2000, NT and XP. The software allows the user to: n Remotely time circuit breakers from a personal computer. n Retrieve timing shots stored in the CT-7000. n Down-loading circuit-breaker test plans to CT-7000. n Recall timing shots from a hard drive for reanalysis at an office PC. 2.
CT-7000 Operating Instructions 3.0 Test Result Tabulation 3.1 Electrical Measurement Results Under the Time Travel Mode, each CT-7000 contact channel provides the following test results: n Contact Close time n Contact Open time n Insertion Resistor Contact Open and Close times n Contact Bounce time n Resistor On time n Contact Spread time NOTE The CT-7000 can detect insertion resistors ranging from 10 to 7,000 Ohms. Resistances over 7,000 Ohms are detected as an open contact. 3.
CT-7000 Operating Instructions 3.4 Digital Voltage Input Results The digital voltage, input channel, “V2” monitors the voltage status as “ON” or “OFF” conditions and graphs the result. A voltage level above 30 Vdc is considered as the “ON” state. The input channel is dedicated to monitor the breaker’s auxiliary switch action during a breaker operation. NOTE Input voltage ranges from 1 to 300 Vac/dc. 3.
CT-7000 Operating Instructions 5.0 CT-7000 Controls and Display Before using the CT-7000, users should become familiar with all of the controls and display indications. The keypad and display are used to operate the CT-7000. Figure 1.0 represents the control panel and the numbered lines pointing to each control and indicator refer to Table 1.0, which describes the function of each control and indicator. Figure 1.
CT-7000 Operating Instructions Table 1.0 CT-7000 Controls and Displays Fig. 1.0 Index no. PANEL MARKING 1 CONTACT INPUT 2 (1 –12) 30-300V V1 & V2 VOLTAGE INPUT 3 30-300V TRIGGER VOLTAGE INPUT 4 120/240Vac, 2A, 50-60Hz Fuse: 250Vac, 3A Fast-Blow FUNCTIONAL DESCRIPTION Female connectors for the contact channels. 3-pin connectors. Each input is a voltage detector for the timing voltages of the trip or close coil switching during the active period.
CT-7000 Operating Instructions 6.0 CT-7000 Analyzer Specifications CONTACT TIMING Open, Close, Open-Close, Close-Open, and Open-Close-Open. SIZE & WEIGHT 16d by 14w by 11h (inches), less than 32 pounds. OPERATING POWER 2 Ampere, 90-120 Vac / 200-240 Vac 50/60 Hz. TIMING WINDOW Selectable between: 1, 10, or 20 second. RESOLUTION ±100 microseconds at 1 second duration. ±1.0 millisecond at 10 second duration. ±2.0 millisecond at 20 second duration. DRY-CONTACT INPUT 3 or 6 or 12 contact channels.
CT-7000 Operating Instructions 7.0 CT-7000 Special Features 7.1 CT-7000 Supplied Cables Table 2.
CT-7000 Operating Instructions 7.2 CT-7000 Operating Voltages The CT-7000 operating voltage is selectable between 110/120 Vac, 50/60 Hz or 220/240 Vac, 50/60 Hz. Voltage selection is set by the JP1 connector on the Power Supply board and the JP3 connector on the Initiate board of the CT-7000. The jumper settings for the connectors are shown in Table 3.0. Table 3.
CT-7000 Operating Instructions 7.5 CT-7000 Printer Paper Control To advance the paper from the printer, press and release the “↑ PAPER LCD” button. retract the thermal paper from the printer, press and release the “↓ PAPER LCD” button. To 7.6 Replacing CT-7000 Thermal Paper The roll of thermal paper resides inside a pocket underneath the printer cover. To replace the paper, follow the steps below: n Remove the printer cover. n Remove the leftover thermal paper roll from the paper holder.
CT-7000 Operating Instructions 8.0 Test Hook-up Connections 8.1 Contact Cable Hookup A typical, contact cable connection to a circuit breaker is shown in Figure 2.0. Red clips are connected to phase A, B and C of the breaker’s bushings. The black clips are connected on the grounded or common, side of the bushings. For circuit breakers with series contacts, connect the contact cables as shown in Figure 3.0. NOTE It is advisable to ground one side of the contacts for most testing purposes.
CT-7000 Operating Instructions Figure 3.
CT-7000 Operating Instructions 8.2 Initiate Cable Hookup The CT-7000 will trip or close breakers through a solid-state device, which will operate on any AC or DC control voltage ranging from 10 to 300 Volts. Both the trip and close circuits are protected by 5 Ampere fuses. A typical DC trip and DC close, control circuit test hookup is shown in Figure 4.0. A typical DC trip and AC close, control circuit test hookup is shown in Figure 5.0. Figure 4.
CT-7000 Operating Instructions 8.3 Analog Voltage Monitor Hookup The analog, voltage input, “V1” permits the user to monitor a breaker's DC control voltage during an operation. The analog, voltage input will record the nominal DC voltage at no load and the minimum DC voltage while the Trip or Close coil is energized. The nominal and minimal voltage readings will be printed on a tabulated report. Analog waveforms will also be plotted in a graphical format.
CT-7000 Operating Instructions 8.5 External Trigger Input The External Trigger Mode enables the user to start recording data when the CT-7000 senses a voltage. A typical application for the External Trigger Mode is to time a circuit breaker in a close operation and to start timing only when the close coil is energized, thus bypassing the 52X relay delay time.
CT-7000 Operating Instructions 8.6 Transducer Connection A typical transducer connection is shown on Figure 8.0. See Appendix I for more transducer connections. Figure 8.
CT-7000 Operating Instructions 9.0 Operating Procedures The main steps to time a circuit breaker are listed in Figure 9.0. . HOOKUP CT-7000 1. GROUND THE CT-7000 (See NOTE) 2. CONNECT CT-7000 CABLES TO BREAKER 3. INSTALL TRANSDUCER WITH CABLE APPLY POWER 1. TURN THE CT-7000 ON 2. PERFORM SELF TESTS: HOOK-UP TEST, CABLE TEST, IF NECESSARY TIMER BREAKER 1. SELECT THE CT-7000 TEST 2. OPERATE THE BREAKER GET RESULTS 1. READ OR PRINT THE TABULATED RESULTS 2. PRINT THE GRAPHICAL RESULTS 3.
CT-7000 Operating Instructions 9.1 Timing a Circuit Breaker The CT-7000 will initiate the breaker operation and do a timing test on the following operations: n OPEN n CLOSE n OPEN-CLOSE n CLOSE-OPEN n OPEN-CLOSE-OPEN NOTE 1. The CT-7000 can start the OPEN-CLOSE operations without a delay or by using a programmable delay between the OPEN and CLOSE commands. 2. The CLOSE-OPEN can be started by the CT-7000, using several options.
CT-7000 Operating Instructions 9.1.1 Timing an OPEN Operation With No Insertion Resistors Table 4.0 Open Operation With No Insertion Resistors STEP ACTION OPERATION DISPLAY 1 READY TIMER FOR BREAKER OPERATION. PRESS #1 KEY. INSERTION RESISTOR? 1.NO 2.YES 2 SELECT NO INSERTION RESISTOR. PRESS #1 KEY. TIMING WINDOWS: 1.WINDOW = 1 SEC 2.WINDOW = 10 SEC 3. WINDOW = 20 SEC 3 SELECT 1-SECOND TIMING WINDOW. PRESS #1 KEY. TRIGGER MODE: 1. Internal Trigger 2.
CT-7000 Operating Instructions 9.1.2 Timing an OPEN Operation With Insertion Resistors The CT-7000 can time breakers with insertion resistors. The insertion resistor can range from 10 to 7,000 Ohms. Any insertion resistor more than 7,000 Ohms is detected as an open circuit. The timing window results will show the main contact time and the insertion resistor contact time. Graphic reports will show the main contact and the resistor contact activities on each of the channels. Table 5.
CT-7000 Operating Instructions 9.1.3 Timing CLOSE-OPEN Operation Using Contact Channel #1 The CLOSE-OPEN operation of the breaker simulates a condition where a breaker is closed on a fault. There are 3 choices for the user to setup the CLOSE-OPEN operation: 1. Contact #1 CLOSE Open operation is initiated after contact channel # 1 is closed. Refer to Table 6.0 on the next page. 2. Set DELAY The user can set a delay from 10 to 500 ms between a CLOSE command to the OPEN command. 3.
CT-7000 Operating Instructions Table 6.0 Close-Open Operation Using Contact Channel #1 STEP OPERATION ACTION DISPLAY 1 READY TIMER FOR BREAKER OPERATION. PRESS #1 KEY. INSERTION RESISTOR? 1.NO 2.YES 2 SELECT NO INSERTION RESISTOR. PRESS #1 KEY. TIMING WINDOWS: 1.WINDOW = 1 SEC 2.WINDOW = 10 SEC 3.WINDOW = 20 SEC 3 SELECT 1-SECOND WINDOW. PRESS #1 KEY. TRIGGER MODE: 1.Internal Trigger 2.External Trigger 4 SELECT INTERNAL TRIGGER. PRESS #1 KEY. TIMING MODE: 1. OPEN 2. CLOSE 3. O-C 4. C-O 5.
CT-7000 Operating Instructions 9.1.4 Timing OPEN-CLOSE-OPEN Operation The OPEN-CLOSE-OPEN operation requires the user to enter two time-delays between the circuit breaker operations. The time delays are in millisecond intervals. The first delay is from the first OPEN command to the CLOSE command. The second delay is from the CLOSE command to the second OPEN command. Refer to Table 7.0 for setting up the OPEN-CLOSE-OPEN operation. Table 7.
CT-7000 Operating Instructions 9.2 Get Tabulated Timing Results Using the Thermal Printer The circuit breaker timing results can be printed on the thermal printer by using the steps listed in Table 8.0. A typical circuit breaker timing result printed on thermal printer is shown in Figure 10.0. A typical circuit breaker timing result printed on ink-jet printer is shown in Figure 11.0. Table 8.0 Get Tabulated Results STEP OPERATION ACTION DISPLAY 1 GET TIMING RESULTS. PRESS #2 KEY. 1.
CT-7000 Operating Instructions 1 2 3 5 6 4 7 8 9 12 10 9 11 13 14 17 16 15 Figure 10.
CT-7000 Operating Instructions 9.2.1 Tabulated Results Interpretation 1. Timing Record is time and date stamped by the CT-7000. 2. Timing record header information (Company, Substation name, Circuit, etc) is also saved with test record. 3. Timing test type (OPEN, CLOSE, O-C, C-O, O-C-O) is identified. An OPEN timing shot is shown in figure 10.0. 4. Contact channel #1 time is shown in both milliseconds and cycles. From Figure 10.0, contact channel #1 time was 34.20 ms or 2.05 cycles. 5.
CT-7000 Operating Instructions Figure 11.
CT-7000 Operating Instructions 9.3 Get Graphic Timing Results Using the Thermal Printer Selecting the “PLOT FULL CHART” command will plot the timing chart as follows: • Timing chart from 0 to 1000 ms with one second window and 50 ms time markers. • Timing chart from 0 to 10 seconds with 10 second window and 500 ms time markers. • Timing chart from 0 to 20 seconds with 20 second window and one second time markers. Table 9.
Analog Voltage Channel V1 Digital Voltage Channel V2 Initiate Current Travel Trace Contact Trace CT-7000 Operating Instructions Figure 12.
CT-7000 Operating Instructions Figure 13.
Analysis Point #1 Analysis Point #2 CT-7000 Operating Instructions Figure 14.0 Expansion Graph From 0 to 200ms From the Thermal Printer NOTE Analysis point # 1 and point #2 are shown on chart.
CT-7000 Operating Instructions Figure 15.
CT-7000 Operating Instructions Figure 16.0 Graphical Interpretation of an Open Timing Shot Figure 17.
CT-7000 Operating Instructions Figure 18.
CT-7000 Operating Instructions 9.4 Save Timing Shots in the EEPROM Use the steps in Table 10.0 to save a timing shot in the FLASH EEPROM. Table 10.0 Save Timing Shot In EEPROM STEP OPERATION ACTION DISPLAY 1 SELECT SETUP MENU. PRESS #3 KEY. 1. ANALYSIS POINTS 2. MEASUREMENT UNITS 3. SAVE / RESTORE 4. NEXT PAGE 2 SELECT SAVE MENU. PRESS #3 KEY. 1. SAVE SHOT 2. RECALL SHOT 3. SHOT DIRECTORY 4. ERASE SHOT 3 SELECT SAVE SHOT. PRESS #1 KEY.
CT-7000 Operating Instructions 9.5 Printing Timing Shot Directory Stored in the EEPROM The user can obtain a timing-shot directory that was stored in the CT-7000’s FLASH EEPROM by using the following steps in Table 11.0. Table 11.0 Print Timing Shot Directory STEP OPERATION ACTION DISPLAY 1 SELECT SETUP MENU. PRESS #3 KEY. 1. ANALYSIS POINT 2. MEASUREMENT UNITS 3. SAVE / RESTORE 4. NEXT PAGE 2 SELECT SAVE/RESTORE MENU. PRESS #3 KEY. 1. SAVE SHOT 2. RESTORE SHOT 3. SHOT DIRECTORY 4.
CT-7000 Operating Instructions Figure 19.
CT-7000 Operating Instructions 9.6 Recalling a Timing Shot The following steps in Table 12.0 are used to recall a timing shot stored in the EEPROM to the working memory. Once a timing shot is recalled, the user can ask for a printout of the test results from the thermal printer. Table 12.0 Recalling a Timing Shot STEP OPERATION ACTION DISPLAY 1 SELECT SETUP MENU. PRESS #3 KEY. 1. ANALYSIS POINT 2. MEASUREMENT UNITS 3. SAVE / RESTORE 4. NEXT PAGE 2 SELECT SAVE/RESTORE SHOT. PRESS # 3 KEY. 1.
CT-7000 Operating Instructions 9.7 Deleting a Timing Shot Users can delete a specific timing shot or all of the timing shots from the CT-7000’s EEPROM by using the steps described in Table 13.0. Table 13.0 Deleting a Timing Shot STEP OPERATION ACTION DISPLAY 1 SELECT SET UP MENU. PRESS # 3 KEY. 1. ANALYSIS POINTS 2. MEASUREMENT UNITS 3. SAVE / RESTORE 4. NEXT PAGE 2 SELECT SAVE / RESTORE MENU. PRESS # 3 KEY. 1. SAVE SHOT 2. RESTORE SHOT 3. SHOT DIRECTORY 4. ERASE SHOT 3 SELECT ERASE SHOT.
CT-7000 Operating Instructions 9.8 Shot Description The CT-7000 has the capability for users to enter the breaker and other identification information. The data usually consists of the names of the company, station, circuit and manufacturer. Other information could be the breaker's model, serial number and the operator's name. The identification data will print out on the header section of the tabulated report.
CT-7000 Operating Instructions Table 14.0 Entering Shot Identification Header (Continued) STEP OPERATION ACTION DISPLAY 8 ENTER BREAKER MODEL. PRESS KEYS 0-9 AND PRESS THE "ENTER" KEY TO CONFIRM. ENTER SERIAL NUMBER XXXX "ENTER" TO CONFIRM 9 ENTER SERIAL NUMBER. PRESS KEYS 0-9 AND PRESS THE "ENTER" KEY TO CONFIRM. ENTER SERIAL NUMBER XXXX "ENTER" TO CONFIRM 10 ENTER OPERATOR NAME. PRESS KEYS 0-9 AND PRESS THE "ENTER" KEY TO CONFIRM.
CT-7000 Operating Instructions 9.9 Computer Interface Each CT-7000 has an RS-232C port, where the Breaker Analysis Software package provided with each CT-7000, enables an IBM-compatible personal computer to communicate with the unit. The software operating under Windows 95, 98, Me, 2000, NT and XP environments allow the user to upload timing shots stored in the EEPROM into the computer.
CT-7000 Operating Instructions 9.10 Breaker Travel Analysis The CT-7000’s travel analysis includes the breaker’s stroke, over-travel, bounce-back, contact-wipe distances and contact velocity calculations. 9.10.1 Breaker Stroke The CT-7000 uses a digital transducer to measure a breaker's contact stroke, over-travel and bounce-back. The digital transducer output are 200 counts per linear inch of travel, therefore the resolution is accurate to about 1/200 inch. The output resolution is ±0.
CT-7000 Operating Instructions 9.10.7 Analysis Point No.1 (AP1) Three selections are available to the user for setting analysis point No. 1: 1. PERCENTAGE OF STRK 2. DISTANCE FROM CLOSE 3. CONTACT #1 a. Percentage of Stroke Percentage of stroke is the distance based upon the percentage of the total breaker’s stroke distance. The distance is always measured from the starting point at the fully closed position of the breaker contacts. See appendix A for more detail. b.
CT-7000 Operating Instructions NOTES 1. Average velocity through the arc zone is calculated by using the following formula: Vave = Distance ÷ Time 2. The breaker contact velocity can be recalculated based upon the data stored inside the memory after any new analysis points were selected.
CT-7000 Operating Instructions 9.11 Set-Up Open Analysis Points Table 16.0 Setting Up "OPEN" Analysis Points Using Distance STEP OPERATION ACTION DISPLAY 1 SELECT SET UP MENU. PRESS # 3 KEY. 1. ANALYSIS POINT 2. MEASUREMENT UNITS 3. SAVE / RESTORE 4. NEXT PAGE 2 SELECT ANALYSIS POINT. PRESS # 1 KEY. 1. OPEN TIMING 2. CLOSE TIMING 3. PRINT SETTING 4. TEST PLAN 3 SELECT OPEN TIMING. PRESS # 1 KEY. OPEN ANALYSIS PT 1 1. PERCENT OF STROKE 2. DISTANCE FROM CLOSE 3.
CT-7000 Operating Instructions NOTES 1. If an entry is not correct, re-enter the digits until the screen shows the desired numbers, then press the “ENTER” key. 2. Analysis Point #1 is 1.00 inch from the fully closed position. 3. Analysis Point #2 is 2.00 inches from the fully closed position.
CT-7000 Operating Instructions 9.12 Circuit Breaker Test Plan A circuit breaker test plan contains breaker maximum/minimum operating parameters. A typical list of operating parameters is show as follows: • Max/Min Contact/Resistor Trip Time. • Max/Min Contact/Resistor Close Time. • Max Contact Spread Time. • Max Resistor Contact Spread Time. • Max/min Contact Close-Open Time. • Max/min Contact Open-Close Time. • Max/min Resistor Close-Open Time. • Max/min Resistor Open-Close Time. • Max/Min Breaker Stroke.
CT-7000 Operating Instructions STEP OPERATION ACTION DISPLAY 4 SELECT LOAD TEST PLAN. PRESS # 1 KEY. LOAD TEST PLAN “ ∧ ” “ ∨ ” TO SCROLL "ENTER" TO SELECT 5 VIEW TEST PLAN HEADER. PRESS “UP” or “DOWN” KEY TO SCROLL. DISPLAY TEST PLAN HEADER 6 CONFIRM TEST PLAN TO BE LOADED. PRESS THE "ENTER" KEY. 1.TIME BRKR 2.GET RSLT 3.SET UP 4.DIAGNOSTICS Figure 20.
CT-7000 Operating Instructions 9.14 Print a Breaker Test Plan The user can print a breaker test plan stored in the CT-7000 EEPROM. Table 18.0 Print a Test Plan STEP OPERATION ACTION DISPLAY 1 SELECT SET UP MENU. PRESS # 3 KEY. 1. ANALYSIS POINT 2. MEASUREMENT UNITS 3. SAVE / RESTORE 4. NEXT PAGE 2 SELECT ANALYSIS POINT. PRESS # 1 KEY. 1. OPEN TIMING 2. CLOSE TIMING 3. PRINT SETTING 4. TEST PLAN 3 SELECT TEST PLAN. PRESS # 4 KEY. 1. LOAD TEST PLAN 2. PRINT TEST PLAN 3.
CT-7000 Operating Instructions Velocity Calculation Formula Figure 21.
CT-7000 Operating Instructions Figure 22.
CT-7000 Operating Instructions Figure 23.
CT-7000 Operating Instructions 9.15 Print a Breaker Test Plan Directory The CT-7000 breaker test plan directory stored in the CT-7000 EEPROM using the steps in table below: Table 19.0 Print a Breaker Test Plan Directory STEP OPERATION ACTION DISPLAY 1 SELECT SET UP MENU. PRESS # 3 KEY. 1. ANALYSIS POINT 2. MEASUREMENT UNITS 3. SAVE / RESTORE 4. NEXT PAGE 2 SELECT ANALYSIS POINT. PRESS # 1 KEY. 1. OPEN TIMING 2. CLOSE TIMING 3. PRINT SETTING 4. TEST PLAN 3 SELECT TEST PLAN. PRESS # 4 KEY. 1.
CT-7000 Operating Instructions 9.16 English/Metric or Rotary Transducer Selection The CT-7000 supports and displays both English and Metric calculations from the breaker's travel parameters such as the stroke, velocity and other parameters. The user can switch from one system to the other by following the steps in Table 20.0. Rotary transducer requires the user to enter the defined linear distance in millimeters or inches, per one degree of rotary motion as seen in Table 21. Table 20.
CT-7000 Operating Instructions 9.17 Set CT-7000 Internal Clock The CT-7000 has an internal clock with a lithium battery. The clock's time and date is displayed on the LCD screen. When a timing shot is stored in the EEPROM, the time and date are also stored along with the shot. To set the clock, perform the steps in the following Table 22.0. Table 22.0 Setting the Clock and Calendar STEP OPERATION ACTION DISPLAY 1 SELECT SET UP MENU. PRESS # 3 KEY. 1. ANALYSIS POINT 2. MEASUREMENT UNITS 3.
CT-7000 Operating Instructions 9.18 Slow-Close Test The CT-7000 offers a unique feature called a "Slow-Close" test. The test permits users to measure the distance of a breaker's contact travel from the fully opened position to the contact or "touch" position, to the contact wipe, or penetration distance. The test requires the operator to manually jack the breaker's contact from the fully open position to the fully closed position.
CT-7000 Operating Instructions Figure 25.0 Typical Slow-Close Test Report NOTE By adding the contact touch and the contact wipe distance, the total is the breaker’ stroke. 9.19 Transducer Self-Test The operator can check the transducer electronics by connecting the transducer to the CT7000 and running a “Test Transducer” diagnostics. Table 24.0 Performing a Transducer Self Test STEP OPERATION ACTION DISPLAY 1 SELECT DIAGNOSTIC. PRESS # 4 KEY. 1. SLOW-CLOSE TEST 2. PRINT DATA 3. TEST TRANSDUCER 4.
CT-7000 Operating Instructions 9.20 Check Cable Hookup Table 25.0 Checking the Cable Hookup STEP OPERATION ACTION DISPLAY 1 SELECT DIAGNOSTIC. PRESS # 4 KEY. 1. SLOW-CLOSE TEST 2. PRINT DATA 3. TEST TRANSDUCER 4. CHECK HOOKUP 2 SELECT CHECK HOOK UP. PRESS # 4 KEY. MAKE SURE BREAKER IS IN CLOSE POSITION, THEN PRESS "START" 3 INITIATE TEST. PRESS THE "START" KEY. 123 C--- 4 RETURN TO MAIN MENU. PRESS THE "STOP" KEY. 1. TIME BREAKER 2. GET RESULT 3. SET UP 4. DIAGNOSTIC NOTES 1.
CT-7000 Operating Instructions 9.21 Automatic Print Setting The CT-7000 can be set to print graphs and tabulated results automatically after each timing shot. To turn on the “Auto Print Results” mode, follow the steps in Table 26.0. Table 26.0 Automatic Print Setting STEP OPERATION ACTION DISPLAY 1 SELECT SET UP MENU. PRESS # 3 KEY. 1. ANALYSIS POINT 2. MEASUREMENT UNITS 3. SAVE / RESTORE 4. NEXT PAGE 2 SELECT NEXT PAGE. PRESS # 4 KEY. 1. SHOT DESCRIPTION 2. COMPUTER ITF 3. SET CLOCK 4.
CT-7000 Operating Instructions 9.22 CT-7000 Channel Configuration The CT-7000 is available with 3-, 6-, or 12- contact inputs. Under most common timing conditions, the user needs to use only 3 contact timing channels and one travel transducer. There is no need to print more than 3 timing channels and one transducer channel on the graphic and tabulated report.
CT-7000 Operating Instructions 9.23 Running CT-7000 in Tandem For timing application requiring more than 12 timing contact channels, the user can use two or more CT-7000s to time a circuit breaker. A typical application is to use a CT-7000-12 and a CT7000-6 to time a 18-contact ATB. To time this circuit breaker, the user can use the following steps: n Connect the CT-7000-12 to phase A and B of the circuit breaker. n Connect the CT-7000-6 to phase C of the circuit breaker.
CT-7000 Operating Instructions 10.0 CT-7000 Trouble Shooting Guide Problems Suggestion n Make sure you hold the “ARM” switch down during each test. n Check the OPEN or CLOSE fuses. 1. CT-7000 will not trip nor close the breaker. n Check the initiate leads. For a “Positive Trip” circuit, one Close lead and one Open lead should be connected to the Positive side of the power supply. n Check the initiate leads.
CT-7000 Operating Instructions Problems Suggestion n Go to SETUP (Press key #3). n Select Analysis (Press key #1). 9. How does one review the current analysis setting? n Select PRINT SETTING (Press key #3). The CT-7000 will print out the current AP1 & AP2 settings. n Make sure the CT-7000 is under computer control mode. n Make sure your PC communication port is selected correctly. 10. The CT-7000 will not communicate with the PC. n Make sure your serial cable is connected properly. 11.
CT-7000 Operating Instructions APPENDIX A ITE Circuit Breaker model 14.4K Timing Chart AP1= 1.5” Bounce Back AP2= 3.
CT-7000 Operating Instructions APPENDIX B CLOSE-OPEN Timing Chart for ITE Circuit Breaker Model 14.
CT-7000 Operating Instructions APPENDIX C CLOSE-OPEN Tabulated Report for ITE Circuit Breaker Model 14.
CT-7000 Operating Instructions APPENDIX D OPEN-CLOSE Timing Chart for ITE Circuit Breaker Model 14.
CT-7000 Operating Instructions APPENDIX E OPEN-CLOSE Tabulated Report for ITE Circuit Breaker Model 14.
CT-7000 Operating Instructions APPENDIX F SIEMENS TCP Breaker Velocity Calculation 71
CT-7000 Operating Instructions APPENDIX G SIEMENS SPS2 Breaker Velocity Calculation 72
CT-7000 Operating Instructions APPENDIX H CT-7000 SIEMENS SPS2 Test Plan 73
CT-7000 Operating Instructions APPENDIX I CT-7000 Transducer Illustration Linear Transducer on an OCB Rotary Transducer on Alstom HE 1014 Circuit Breaker 74
CT-7000 Operating Instructions Rotary Transducer on ABB HMB Mech String Transducer on ABB 72PM Circuit Breaker 75
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