Digital Circuit Breaker Analyzer CBT-6500

Easy to Use; Available with 3, 6, or 12 Dry-Contact Inputs

The CBT-6500 S2 is an inexpensive, easy to use, stand-alone, microprocessordriven EHV circuit-breaker analyzer. The CT-6500 S2 is available in models with either 3 (CBT-6500-3 S2), 6 (CBT-6500-6 S2), or 12 (CBT-6500-12 S2) drycontact inputs. The CT-6500 S2 can fully analyze a circuit-breaker's performance by testing the contact time, stroke, velocity, over-travel, and contact wipe. Contact-motion analysis can be performed for all breaker contact operations (Open, Close, Open – Close, Close – Open, and Open – Close – Open). The CBT-6500 S2's timing window is selectable between 1-second, 10-second, or 20- second periods. The 10-second and 20-second timing windows are ideal for timing long duration events such as circuit-switcher contact testing.

View an usage demostration

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.

Voltage Monitoring Inputs

One analog voltage input channel is dedicated to monitoring a circuit-breaker's DC power supply or coil voltage (0 – 255 volts, DC or peak AC). One digital voltage input channel is dedicated to detecting the voltage on/off status (presence or absence) of an A/B switch.

Trip/Close Current Monitoring

A built-in Hall-effect current sensor records the Trip/Close current level and duration. The breaker's operating-coil current waveform duration (effectively, a performance "fingerprint" or "current profile") can be used as a diagnostic tool for analyzing a breaker's performance.

Breaker Stroke and Velocity

Three digital travel transducer channels are available on the CBT-6500 S2 for measuring circuit-breaker velocity, stroke, over-travel, and bounceback. Unlike other transducer types, the digital transducer requires neither calibration nor setup.

"Slow-Close" Test

The "slow-close" test feature is a very useful tool for accurately measuring contact-travel during circuit maintenance, especially when the circuitbreaker contact motion is slowly jacked through the stroke by manual operation. A table of the "slow-close" test results can be printed on the built-in thermal printer.

Breaker Initiate Features

A built-in solid-state initiate device is used to operate a breaker from the CBT-6500 S2. The operational modes include Open, Close, Open – Close, Close – Open, and Open – Close – Open. Multiple operations, such as Open – Close and Open – Close – Open, can be initiated by using programmable delay time or by sensing a breaker's contact condition.

Internal Test Record Storage

The CBT-6500 S2 can store up to 200 test records in Flash EEPROM. Test records can be retrieved and printed on the built-in thermal printer, or they can be transferred to a PC via the unit's RS-232C or USB interface.

Computer Interface

The CBT-6500 S2 can be computer-controlled via its RS-232C or USB interface. A Windows® XP/Vista-based Breaker-Analysis software application is provided with each unit. Using this software, circuit-breakers can be timed from the PC. Test records can be retrieved from the CBT-6500 S2 and then stored on the PC for future analysis and report generation. Additionally, test records can be exported in Microsoft® Excel format for further analysis.

Diagnostic Capabilities

The CBT-6500 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.

User Interface

The CBT-6500 S2 features a back-lit LCD screen (20 characters by 4 lines) that is viewable in both bright sunlight and low-light levels. A rugged, 16- key, membrane keypad is used to control the unit.

Built-in Thermal Printer

The CBT-6500 S2's built-in 4.5-inch wide thermal printer can print the breaker contact analysis results in both tabular and graphic formats.