Atec CT-7000 User Manual
CT-7000 S2
digital circuit breaker analyzer
Vanguard Instruments Company, Inc.
www.vanguard-instruments.com
CT-7000 S2
digital circuit breaker analyzer
The CT-7000 S2 is Vanguard’s third generation, stand-alone, microprocessor-driven
EHV circuit-breaker analyzer. This inexpensive and easy to use analyzer is available
in models with either 3 (CT-7000-3 S2), 6 (CT-7000-6 S2), or 12 (CT-7000-12 S2) drycontact inputs. The CT-7000 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 circuit breaker operations (Open, Close, Open – Close,
Close – Open, and Open – Close – Open). The CT-7000 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.
1
Contact Timing Inputs
The CT-7000 S2 is available in models with either 3
(CT-7000-3 S2), 6 (CT-7000-6 S2), or 12 (CT-7000-12
S2) dry-contact inputs. Each contact input channel can
detect main contact and insertion-resistor contact times
in milli-seconds and cycles.
2
Breaker Stroke and Velocity
Three digital travel transducer channels are available
on the CT-7000 S2 for measuring circuit-breaker velocity, stroke, over-travel, and bounce-back. Unlike other
transducer types, the digital transducer requires neither
calibration nor setup. A breaker’s contact-velocity is calculated based on the contact’s travel distance over a period of time. A special feature is also available to “slowclose” test a breaker and obtain a test result report.
3
Resistor Type Transducer
Input
One optional resistor type input channel is also
available on the CT-7000 S2. This input channel
allows the unit to measure circuit-breaker motion by directly interfacing with resistive type
transducers. The transducer resistance ranges
from 200 ohms to 10K Ohms.
4
Voltage Monitoring
Inputs
One analog voltage input channel, designated as
V1, is dedicated to monitoring a circuit-breaker’s
DC power supply or coil voltage (0 – 255 volts,
DC or peak AC). A second voltage input channel,
designated as V2, is dedicated to detecting the
voltage on/off status (presence or absence) of
an A/B switch.
5
Breaker Initiate Features
A built-in solid-state initiate device is used to
operate a breaker from the CT-7000 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.
A built-in Hall-effect current sensor records
the Trip/Close current level and duration. The
breaker's operate-coil current waveform duration (effectively, a performance “fi ngerprint” or
“current profi le”) can be used as a diagnostic
tool for analyzing a breaker's performance.
6
Built-in Thermal Printer
The CT-7000 S2’s built-in 4.5-inch wide thermal
printer can print the breaker contact analysis results in both tabular and graphic formats.
ordering information
Part number CT-7000-3 S2 CT-7000 S2 with 3 contact channels, cables, and PC software
Part number CT-7000-6 S2 CT-7000 S2 with 6 contact channels, cables, and PC software
Part number CT-7000-12 S2 CT-7000 S2 with 12 contact channels, cables, and PC software
Part number CT-7000-CASE CT-7000 S2 shipping case
Part number Paper-TP4 Thermal printer paper
2
CT-7000 S2 Controls & Indicators
1
Contact Timing Channels
RS-232C PC Interface
7
USB PC Interface
Back-lit LCD Screen
(20 characters by 4 lines)
8
Rugged 16-key membrane
7
keypad
Voltage Input Channels
Trigger Input Connector
Resistor Type Transducer Connector
Digital Transducer Connectors
Breaker Initiate Output
4.5" Wide Thermal Printer
Breaker Initiate Arm Switch
4
2
5
6
3
Computer Interface
The CT-7000 S2 can be computer-controlled via
its RS232C or USB interface. Windows® based
BreakerAnalysis software is provided with each
unit. Using this software, circuit-breakers can
be timed from the PC. Test records can be retrieved from the CT-7000 S2 and then stored on
the PC for future analysis and report generation.
Circuit-breaker test plans can also be created on
the PC and transferred to the CT-7000 S2. Additionally, test records can be exported in Excel,
PDF, and XML formats for further analysis.
8
User Interface
The CT-7000 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.
Internal Test Record and
Test Plan Storage
Up to 150 test records can be stored 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 RS232C or USB
interface.
Up to 99 circuit breaker test plans can be stored
in Flash EEPROM. Test plans are comprised of
all circuit-breaker performance specifi cations
(stroke, velocity, and contact time). A test plan
can be used to immediately test a circuit-breaker. A pass/fail report is then generated by comparing actual performance with the specifi cations in the stored test plan. Test plans can also
be generated on a PC and transferred to the CT7000 S2 via the unit’s RS232C or USB interface.
Diagnostic Capabilities
The CT-7000 S2 can perform diagnostics on its
internal electronics. Diagnostics can also be performed to verify contact cable connections and
to test the travel transducer’s electronics.
outstanding features
• Prints breaker analysis results in both tabular
and graphic formats
• Built-in 4.5" wide thermal printer
• Initiate breaker operation
• Digital travel transducer requires no setup or
calibration
• Detects main contact and insertion contact on
the same input channel
• Stores up to 150 test records and 99 test plans
• RS-232C and USB computer interfaces
• Supports resistor type transducer
3
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