• dry-contact inputs: 3 channels (9021-UC) or 6 channels (9100-UC)
• timing windows: 1 second, 10 seconds, or 20 seconds
• timing resolutions ±50 micro-seconds @ 1 sec. duration, ±500 micro-seconds @ 10 sec. duration, ±1.0 milli-seconds @ 20 sec. duration
• breaker operations: Initiate Open, Close, Open-Close, Close-Open, Open-Close-Open
• Fully analyze circuit breaker's performance
• measuring main contact and resistor contact time, stroke, velocity, over-travel, bounce back and contact wipes
• USB computer interface
• USB Flash drive interface (Flash drive not included)
• Store up to 200 test records and 100 test plans internally
• Initiate Breaker Operation
• Built-in 4.5" wide Thermal Printer
• Rugged "QWERTY" style membrane keypad
• Optional "On-line" Timing Mode
• Optional dual ground testing mode
• Optional Bluetooth wireless computer interface

The CT-7000 S3 is Vanguard's fourth generation EHV circuit breaker analyzer. The CT-7000 S3 is available with 3 (part number 9021-UC) or 6 contact timing channels (part number 9100-UC). The CT-7000 S3 can fully analyze a circuit breaker's performance by measuring the main contact and resistor contact time, stroke, velocity, over-travel, bounce back and contact wipes. Both contact and motion analysis can be performed on all circuit breaker operations (OPEN, CLOSE, OPEN-CLOSE, CLOSE-OPEN, and OPEN CLOSE-OPEN).

Contact Timing Input Channels

The CT-7000 S3's dry contact timing channels (up to 6 channels) are used to time the circuit breaker main

contacts. Each main contact timing channel is capable of detecting the main contact and insertion resistor contact time. Timing results are displayed in milliseconds and cycles.

Breaker Stroke and Velocity

Three dedicated digital travel transducer channels are available on the CT-7000 S3 for measuring circuitbreaker contact stroke, velocity, over-travel, and bounce back. With the use of the Vanguard digital travel transducers, neither calibration nor setting is required. Circuit breaker contact velocity is calculated based on contact’s travel distance over a period of time. Special formulas to calculate velocity is also accommodated by the CT-7000 S3. Special feature is also available to “Slow-Close” test the circuit breaker and obtain a test result report.

Resistor Type Transducer Inputs

The CT-7000 S3 offers 3 resistor type transducer input channels. These input channels are used to interface

with any resistor-type transducers to monitor the circuit breaker motion. Transducer resistance ranges from 200Ohms to 10K Ohms.

Voltage Monitoring Channels

The CT-7000 S3 features three voltage monitoring input channels (V1, V2, and V3). The V1 voltage

channel is dedicated to monitoring the substation DC supply or coil voltage (0-255 V, DC or peak AC). The nominal and minimum DC supply voltage levels are recorded and printed on the tabulated report. An analog waveform showing the DC power supply is plotted on the graphical report. The two digital voltage input channels, V2 and V3, are dedicated to monitoring voltage on/off status presence or absence of the circuit

breaker auxiliary switches. Digital waveforms showing V2 and V3 activity are plotted on the

graphical report. Three timing events of the V2 and V3 activities are recorded and printed on the

tabulated report.

Breaker Initiate Features

A built-in solid-state initiate device is used to

operate a breaker from the CT-7000 S3. Operational

modes include OPEN, CLOSE, OPENCLOSE,

CLOSE-OPEN, and OPEN-CLOSE-OPEN.

Multiple operation like OPEN-CLOSE, CLOSEOPEN,

and OPEN-CLOSE-OPEN can be initiated

by using a programmable delay time (in

milliseconds) or by sensing a specifi c breaker

Computer Interface

The CT-7000 S3 can be computer-controlled

via the USB or optional Bluetooth interface.

Windows-based Circuit Breaker Analysis

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 S3 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 S3. Additionally, test

records can be automatically exported in Excel,

OPEN/CLOSE Coil Current Monitoring

One built-in, hall-effect sensor records the

OPEN/CLOSE coil current amplitude and

waveform. The circuit breaker’s coil current

waveform, effectively, a coil performance “fi ngerprint”

or “current profi le”, can be used as a

diagnostic tool for analyzing the circuit breaker’s

Built-in Thermal Printer

The CT-7000 S3's built-in 4.5" wide thermal

printer can print the breaker contact analysis

ordering information

Part number 9021-UC CT-7000 S3 with 3 contact channels, cables, and PC software

Part number 9100-UC CT-7000 S3 with 6 contact channels, cables, and PC software

Part number 9021-SC CT-7000 S3 shipping case

Part number TP4-CS TP4 thermal printer paper (24 rolls)

Part number 9021-DG CT-7000 S3 Dual Ground Option

Part number 9021-OT CT-7000 S3 Online Timing Option

Part number 9021-BT CT-7000 S3 Bluetooth Option