EHV Circuit Breaker Analyzer – Available On Request, Prices in Dollars

Description EHV Circuit Breaker Analyzer The Vanguard DIGITMR S2 is an inexpensive, easy to use digital circuit breaker analyzer. The DIGITMR S2 can be operated stand-alone or can be computer-controlled. It can fully analyze a circuit-breaker’s performance by testing the contact time, stroke, velocity, over-travel, and contact wipe. Contact and motion analysis can be performed for all breaker contact operations (Open, Close, Open – Close, Close – Open, and Open – Close – Open). Timing results are recorded and displayed on the 240 x 128 pixels back-lit LCD screen and can also be printed on the built-in 4.5″ wide thermal printer.  Stand-alone, microcomputer-driven EHV Circuit Breaker Analyzer Analyzes contact time, stroke, velocity, over-travel, and contact wipe USB PC interface USB Flash drive interface Can store up to 200 test records and 100 test plans Built-in thermal printer On-line Timing Mode In addition to the conventional off-line timing mode, the DIGITMR S2 also offers an optional “on-line” timing mode. In this mode, the DIGITMR S2 captures the breaker’s trip or close time, the trip/close coil current “fingerprint,” and the battery supply voltage while the breaker is still in service. The trip/close time is derived from the time of trip, or close coil initiation, to the breaker’s bush­ing current breaker-make as detected by an AC clamp-on current sensing probe. The “on-line” timing mode can detect a breaker’s operating conditions with little or no down time. In this mode, the first trip operation time of the breaker is captured. If a breaker has been in ser­vice for a long period of time and sitting in close position, the first trip time of the breaker may be slow possibly due to a sticky mechanism. The “on-line” mode is very useful in such cases because traditional breaker timing may not detect this con­dition since several operations may have occurred before the first timing test is conducted. Diagnostic Capabilities The DIGITMR S2 can perform diagnostics on its in­ternal electronics. Diagnostics can be performed to verify contact cable connections and to test the travel transducer’s electronics. Open/Close Coil Current Monitoring A built-in Hall-Effect current sensor records the circuit breaker’s operating coil current amplitude and duration. The circuit breakers’ operating-coil waveforms (effectively, a performance “fin­gerprint” or “current profile”) can be used as a diagnostic tool for analyzing a circuit breaker’s performance. Voltage Monitoring Input One analog input channel, designated as (V1), is dedicated to monitoring the substation DC supply or coil voltage (0-255 Volts, DC or peak AC). A second voltage input channel, designated as V2, is dedicated to detecting voltage On/Off status (presence or absence). This input can be used to monitor the status of an A/B switch. Internal Test Record and Test Plan Storage The DIGITMR S2 can store up to 200 test records and 100 circuit breaker test plans in Flash EEPROM. A test plan comprises of all circuit breaker performance specifica­tions (Stroke, Velocity, and Contact Time). When a test plan is used, the DIGITMR S2 compares the test results for the circuit breaker against its performance to gener­ate a “Pass/Fail” report. Test plans are generated using the included Windows®-based Circuit Breaker Analysis application. Test plans can be transferred to the DIGITMR S2 via the USB or optional Bluetooth interface, or by using an external USB Flash drive. Up to 999 test records and 999 test plans can be stored on an external USB Flash drive.  Contact Timing Inputs Dry-contact input channels are used for timing circuit-breaker contacts. Each contact input channel can detect main contact and insertion-resistor contact times in milli-seconds and cycles. Three contact timing channels are available on the DIGITMR S2. Breaker Stroke and Velocity One digital transducer input channel is available to mea­sure circuit breaker contact stroke, velocity, over-travel, and bounce-back. With the use of a Vanguard digital travel transducer, no set-up calibration is required be­fore testing. A special feature is also available to “Slow-Close” test a circuit breaker and obtain test results. An optional Resistor Transducer Adapter Device can be used to interface with any resistor transducer. CT Input One non-contact AC current sensor is used to monitor circuit breaker on-line current for the “on-line” timing mode. Circuit Breaker Initiate Feature A built-in solid-state initiate device is used to operate the circuit breaker from the DIGITMR S2. Operational modes include Open, Close, Open-Close, Close-Open, and Open-Close-Open. Multiple operations such as Open-Close, Close-Open, and Open-Close-Open can be initiated using a programmable delay or by sensing the circuit breaker’s contact condition. The circuit breaker coil current amplitudes and waveforms are recorded and can be printed on the thermal printer. User Interface The DIGITMR features a back-lit (256 x 128 pixels) graphic LCD screen to display menus and test results. A convenient, rugged, 44-key QWERTY-style keypad is used to control the unit and enter data. Computer Interface One USB interface port and one optional Bluetooth in­terface is available for computer-control. Vanguard’s Windows®- based Circuit Breaker Analyzer application is included with each DIGITMR S2. The software can be used to control the unit, review test records, and create circuit breaker test plans. Test records can be exported to PDF, Excel, and XML format. All future software up­dates can be downloaded from the Vanguard web site at no additional charge. Built-in Thermal Printer The DIGITMR S2 features a built-in 4.5” wide thermal printer that can print test results in both tabulated and graphic format. SPECIFICATIONS  TYPE portable digital circuit breaker analyzer  PHYSICAL SPECIFICATIONS 18.5”W x 14”H x 7”D (47.0 cm x 35.7 cm x 17.6 cm); Weight: 20 lbs (9.1 kg)  INPUT POWER 3 Amps, 100 – 240 Vac, 50/60 Hz  DRY-CONTACT INPUTS 3 dry-contact channels; each channel detects main contact and insertion resistor contact  TIMING WINDOWS 1-second, 10-seconds, or 20-seconds  TIMING RESOLUTIONS ±50 micro-seconds @ 1-second duration, ±500 micro-seconds @ 10-second duration, ±1.00 milli-second @ 20-second duration  TIMING ACCURACY 0.05% of reading ±0.1 ms @ 1-second duration CONTACT DETECTION RANGE Closed: less than 20 ohms; Open: greater than 5,000 ohm  RESISTOR DETECTION RANGE 50 – 5,000 ohms  TRIGGER INPUT VOLTAGE Open/Close: 30 – 300V, DC or peak AC  VOLTAGE SENSING INPUT RANGE V1: analog input; 0 – 255V, DC or peak AC; Sensitivity: ±1V V2: voltage presence/absence detector input; 30 – 300V, DC or peak AC  BREAKER OPERATIONS Initiate Open, Close, Open – Close, Close – Open, Open – Close – Open  BREAKER INITIATE CAPACITY 30A, 250 Vac/dc max  INITIATE CURRENT READING RANGE One, non-contact, Hall-effect sensor, 0 – 20 amp range, dc to 5Khz  TRAVEL TRANSDUCER INPUT 1 digital travel transducer channel; Linear range: 0.0 – 60.0 in (±0.005 in.); Rotary range: 0 – 360 degrees (±0.006 degrees)  CONTACT TRAVEL POINT DIFFERENCE Measures “slow-close” contact-point distances; results can be printed CT CURRENT SENSOR One, non-contact, 0 – 100A  DISPLAY Back-lit LCD screen (240 x 128 pixels); viewable in bright sunlight and low light levels PRINTER Built-in 4.5-inch wide thermal printer can print both graphic contact travel waveforms and tabulated test results INTERNAL TEST RECORD STORAGE Stores up to 200 test records and 100 test plans  COMPUTER INTERFACES One USB port, optional Bluetooth interface  PC SOFTWARE Windows®-based Vanguard Circuit Breaker Analysis (VCBA S2) software is included with purchase price. Software updates available at no additional charge.  SAFETY Designed to meet UL/IEC 61010 and CAN/CSA C22.2 No. 1010.1-92 standards  ENVIRONMENT Operating: -10°C to 50° C (15°F to +122° F); Storage: -30° C to 70° C (-22°F to +158° F)  OPTIONS Transportation case (available for the DigiTMR S2 and the travel transducers)  WARRANTY One year on parts and labor Specifications are valid at nominal voltage and ambient temperature of +25˚C (+77˚F).