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  1. 1. Rapidly Ana Voltage Monitoring Inputs (V1 & V2) One analog voltage input channel (designated as V1) is dedicated to monitoring a circuit-breaker dc power supply or a coil voltage (0 to 255 volts, dc or peak ac). A second voltage input channel (designated as V2) is dedicated to detecting volt- age on/off status (presence or absence) of an A/B switch (an input range of 30- 300 V dc or peak ac). Trip/Close Current Monitoring A built-in Hall-effect current sensor records the Trip/Close current level and duration. The Trip/Close coil current waveform (effectively, a performance “fingerprint” or cur- rent profile) can be used as a diagnostic tool for analysis of a breaker’s performance. Breaker Stroke and VelocityCT-8000 Three digital travel transducer channels enable the CT-8000 to measure stroke, over- travel, and bounce-back. Unlike other types of travel transducers, the digital transduc- er requires no calibration or setup. A contact-velocity calculation is based on a contact’s travel distance over a period of time, which is defined by the breaker manufacturer’s TM specifications. A special feature lets users “slow-close” a breaker and produce a test- result report. Dynamic Contact Resistance One channel of Dynamic Contact Resistance test is also available. A built-in 200-ampere power supply provides the test current for this application. Resistance measurementThe Vanguard Instrument Company, Inc. Model CT-8000™ EHV Circuit-Breaker ranges from 1 micro-ohm to 1999 micro-ohms. The dynamic resistance test allows theAnalyzer is a fifth-generation design configuration. The Model CT-8000 is a stand- user to monitor contact resistance during circuit breaker operation. This feature allowsalone, microcomputer-controlled Circuit-Breaker Analyzer that is inexpensive and the user to detect circuit-breaker contact erosion, or contact problems that can not beeasy to use. It operates in either of two modes: As a traditional Time-vs-Travel ana- detected in static resistance test. The CT-8000 can be used as a 200-ampere, micro-ohmlyzer or as a Quick-Shot (on-line timing). The CT-8000 is available with either 3 meter to check circuit-breaker contact resistance, bus connection, or other applicationsdry contacts (CT-8000-3) or 6 dry contacts (CT-8000-6) configurations. Both where a low-resistance measurement is required.models are supplied with 3 digital travel transducer input channels.Quick Shot Mode Resistor Type Transducer Input ChannelIn the Quick-Shot mode, the CT-8000 captures the breaker’s trip or close time, the One resistor type input channel is also available with the CT-8000. This input channelTrip/close-coil current “fingerprint,” and the battery-supply voltage (while the allows the CT-8000 to interface directly with resistive type transducers. The transducerbreaker is still on-line and in service). Trip/close time is derived from the time of resistance ranges from 200 ohm to 10K Ohm.trip, or at the close-coil initiation, to the breaker’s bushing current-break or -make Timing Shot Storage Capabilities(detected by an ac clamp-on current-probe). The CT-8000 uses Flash Electrically Erasable PROMs (EEPROMs) to store timing data.With a simple connection, the Quick-Shot mode detects a breaker’s operating con- Unlike other storage media, EEPROMs are immune to shock, temperature, and humid-ditions with little or no down (out of service) time. The Quick-Shot mode captures ity. Stored timing shots can be recalled to re-analyze test data, print copies, or transferthe First-Trip Operation time of the breaker. When a breaker has been in service data to an IBM-PC database for record keeping. Up to 150 timing shots can be storedfor a long time (such as sitting in a closed position), the time of the breakers first in the EEPROMs.trip may be slow (e.g., due to a "sticky" mechanism). Traditional breaker timing Circuit-Breaker Test Planmay not detect this condition, since several operations may have occurred before Up to 99 breaker test plans can be stored in the CT-8000. Test plans comprise allthe first timing test is conducted. breaker specifications (stroke, velocity, contact time). By recalling a test plan, theConventional Time-versus-Travel Analyses Mode user can instantly test a breaker and view a pass/fail report (made by comparingIn the Time-Travel mode, the CT-8000 analyzes circuit-breaker performance, performance with specifications in the stored test plan). A user doesn’t need tonamely: contact time, stroke, velocity, over-travel, and wipe. A 200-ampere, built- look-up a breaker’s specifications to compare with test results to determine if thein, power supply allows the CT-8000 to perform contact dynamic-resistance tests. breaker passed performance tests or not. Test plans can be downloaded to the CT-Contact-motion analyses include: Open, Close, Open-Close, Close-Open, and Open- 8000 via an RS-232C serial port or via a USB port.Close-Open switching sequences. The timing window is selectable: 1-second, 10- Breaker Initiate Featuressecond, or 20-second periods. The 10-second and 20-second windows allow tim- A built-in, solid-state, initiate device allows users to remotely operate the breakering of long-duration events (e.g., circuit-switching contacts).Circuit Breaker Time-Travel Analy from the CT-8000. The operational mode includes: Open, Close, Open-Close,Breaker Contact Timing Inputs Close-Open, and Open-Close-Open. Multiple operation (e.g., Open-Close, Open-Contact timing uses dry-contact input channels. Each contact-input channel can detect Close-Open) can be initiated by using a programmable delay time or by sensing themain contact and insertion-resistor contact times (displayed in milliseconds & cycles). breaker’s contact condition.2
  2. 2. alyze Computer Interface OCB, Vacuum, and SF6 Circuit Breakers with Vanguard’s CT-8000 User Interface One RS-232C Interface port and one USB port allows the CT-8000 to be controlled An alpha-numeric keypad allows users to enter breaker ID and control functions. from an IBM-PC-compatible computer. From the PC, circuit breakers can be timed A 4-line by 20-character LCD readout displays user messages. The LCD is back and users can retrieve timing shots that have been saved in the CT-8000 flash EEP- lighted so messages can be viewed in low light levels. Display contrast is controlled ROM. Windows® XP-based Breaker-Analysis software lets users retrieve test-shot via the CT-8000 keypad. data stored in the computer’s hard-drive disk, re-analyze the stored data, and gen- erate reports in the office on an IBM-compatible computer. This PC software also Built-in Thermal Printer allows users generate customized test-result reports and to create a circuit-breaker A built-in thermal printer prints the breaker contact analysis results in both tab- database library. Additionally, users can create circuit-breaker test plans to be ular and graphic formats on 4.5-inch-wide thermal paper. downloaded to the CT-8000. Voltage Input Linear Channels Transducer Current Lead Contact Timing Connector Channels Sense Lead Travel Transducer Connector Connectors Power Receptacle USB Connector Module Resistor Transducer RS-232C Input Connector Breaker Initiate 4x20 Backlit Output LCD Display 4.5-inch Thermal Printer Rugged 16-Key Breaker Initiate Membrane Keyboard Arm Switch ABB AHMA-8yzer Mechanism Transducer Vanguard Instruments Company Reliability Through Instrumentation RV April 06
  3. 3. Microcomputer Accuracy in an Inexp Graphic and Tabulated Printouts M Built-in Thermal Printer Output EEPROM Stored Test Parameters M M Trip Time Using Quickshot Mode CT-8000Trip Time Using Bushing CT Trip Coil Current Profile PARTS ORDERING INFORMATION for the CT-8000 CIRCUIT BREAKER TIMER: All of the below listed replacement parts may be ordered from Vanguard Instruments Company, Inc. PC software and cables for CT-8000, 3 contact channels Part No: CT-8000-3 PC software and cables for CT-8000, 6 contact channels Part No: CT-8000-6 Carrying case for the CT-8000 Part No: CT-8000-CASE Printer paper, thermally sensitive Part No: Paper-TP4 CT-8000 TRAVEL TRANSDUCERS: 10 inch linear transducer: Part No: LT-10 25 inch linear transducer: Part No: LT-25 30 inch linear transducer: Part No: LT-30 Rotary transducer: Part No: RT 15 inch universal transducer: Part No: UT-15 ABB AHMA-8 Transducer Part No: ST-AHMA-8 ABB AHMB-8 Transducer Part No: ST-AHMB-8Circuit Breaker Time-Travel Analy Westinghouse SF/SFA transducer: Part No: ST-SF/SFA Linear transducer case Part No: LT-CASE
  4. 4. pensive Digital Circuit Breaker Tester • On-Line Timing/Capture First Trip Time FEATURES • Static & Dynamic Resistance Tests • Full Breaker Tabulated & Graphic Data Printout • Output Test Results to Built-in Thermal Printer • Digital Travel Transducer; No Setup or Calibration Required • Supports Resistance Type Transducers • Detect Main Contact and Insertion Resistor Contact on the Same Input Channel • On-Board Flash EEPROM Shot Storage/Test Plan Storage • Computer Interface (RS-232C or USB) SPECIFICATIONS TYPE Special purpose test equipment, portable circuit breaker analyzer PHYSICAL SPECIFICATIONS 16” W by 11” H by 14” D (40.6 cm x 29.9 cm x 35.6 cm); Weight; 25 lbs (11.3 kg) INPUT POWER 90-130 Vac or 200-240 Vac (selectable), 50/60Hz DRY-CONTACT INPUT 3 or 6 dry-input channels; Each channel detects Main and Insertion-Resistor Contacts TIMING WINDOWS Selectable: 1-second, 10-seconds or 20-seconds TIMING RESOLUTION 50 microseconds at 1-second duration; 0.5 milliseconds at 10-second duration; 1.00 milliseconds at 20-second duration TIMING ACCURACY 0.05% of reading, ±50 microseconds at 1-second duration CONTACT DETECTION RANGE Closed: <20 ohms, Open:> 5,000 ohms RESISTOR DETECTION RANGE 50 – 5,000 Ohms CT CURRENT SENSOR One, None Contacting, 0-150 Amp EXTERNAL TRIGGER INPUT Open/Close: 30-300V dc or peak ac VOLTAGE SENSING INPUT RANGE V1: analog input; 0–255 V, dc or peak ac, Sensitivity: ± 1 V; V2: voltage detector (present/absent) input; 30-300V, dc or peak ac BREAKER OPERATION Open, Close, Open-Close, Close-Open, Open-Close-Open BREAKER INITIATE CAPACITY 25 A/250 V ac/dc max (100A Inrush) INITIATE CURRENT READING RANGE One, Non-contact, Hall-Effect sensor, 0-20-amp range, dc to 5 kHz TRAVEL TRANSDUCER INPUT 3 digital travel transducer channels; Linear range, 0.0-30.0 in (±0.01 in); Rotary range 0-360° (±0.36°) CONTACT TRAVEL POINT DIFFERENCE Measures “Slow-Close” contact-point distances (hard copy printout) DYNAMIC/STATIC RESISTANCE RANGE 0.1 to 1,999 micro-ohm, Accuracy: ±2% of reading, ±5 micro-ohm RESISTANCE TEST CURRENT 200 Amperes Typical RESISTOR TYPE TRANSUCER CHANNEL 200 Ohm to 10 K Ohm DISPLAY 4 lines by 20 character back-lit LCD, sunlight viewable PRINTOUT Both graphic contact-travel waveforms & tabulated results are printed on a 4.5-inch thermal printer TEST RECORD STORAGE Store up to 150 timing records and 99 test plans COMPUTE INTERFACE RS-232C port, USB Port PC SOFTWARE Furnished Circuit breaker analysis software running under Windows XP; features graphic display, numerical reports, and data base utility for use at shop or office. SAFETY Designed to meet UL 6101A-1 Certification and CAN/CSA C22.2 No 1010.1-92 ENVIRONMENT Operating: -10°C to 50°C (+15°F to +122°F); Storage: -30°C to70°C (-22°F to +158°F) OPTIONS Hard case for shipping; available for both Travel Transducers and CT-8000yzer WARRANTY One-year warranty on parts and labor Note: The above specifications are valid at nominal voltage and ambient temperature of +25°C (+77°F). Specifications are subject to change without notice. Vanguard Instruments Company Reliability Through Instrumentation Reliability Through Instrumentation RV April 06
  5. 5. Instruments Designed and Developed by the Heartsand Minds of Utility Electricians Around the World You’ve seen a lot of utility test equipment in your time. You work with it routinely.Your facility relies upon it to ensure peak performance. Often times, your maintenancetasks are tedious, time-consuming and repetitive. But timely and accurate informationis the currency of maintaining maximum uptime and minimal repair, thus testing mustbe done. Your instruments must be up to the task. Vanguard Instruments is familiar with your problems and shares in your desire tomake transformer and breaker testing fast, reliable, and simple. These principlesare the basis for every Vanguard design. They also form the premise for our ongoingresearch and development as well as every innovative feature we introduce. How do we know what you’re looking for in utility test equipment? We’re there inthe trenches with you! Our Chief Engineer is frequently on-site at power utility sub-stations around the country and all over the world; working, listening and talkingwith electricians and technicians just like you. More than that, you’ve shown us thereal nitty-gritty of testing. We’ve taken that to heart and then back to the lab to solveyour problems. The results of your recommendations are embodied in utility testequipment that is easy to use, lightweight, rugged and dependable. The EZCT-2000TM,along with Vanguard’s full line of test equipment, leads the industry in accuracy andautomatically performs a range of tasks and calculations that were once the bane ofevery utility electrician. We hope that you will take a few moments to consider the technological innovationsthat are engineered into every Vanguard test instrument. Equally important, we want toknow that our past efforts make a present difference in your testing routines and on-lineuptime. We’re not done though. You can be confident we’re looking for new ways toimprove the results of your testing regimen. Thanks for choosing Vanguard Instruments. Vanguard Instruments Company, Inc. 1520 S Hellman Ave. • Ontario, Calilfornia 91761 USA Phone 909-923-9390 • Fax 909-923-9391 Website: