Atec Vanguard-CT-7000 - Manual (Page 2)

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) dry-
contact 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 con-
tact testing.
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.
Breaker Stroke and Velocity
Three digital travel transducer channels are available
on the CT-7000 S2 for measuring circuit-breaker veloc-
ity, stroke, over-travel, and bounce-back. Unlike other
transducer types, the digital transducer requires neither
calibration nor setup. A breaker’s contact-velocity is cal-
culated based on the contact’s travel distance over a pe-
riod of time. A special feature is also available to “slow-
close” test a breaker and obtain a test result report.
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
ordering information
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 mo-
tion by directly interfacing with resistive type
transducers. The transducer resistance ranges
from 200 ohms to 10K Ohms.
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.
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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 break-
er’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 dura-
tion (effectively, a performance “fi ngerprint” or
“current profi le”) can be used as a diagnostic
tool for analyzing a breaker's performance.
Built-in Thermal Printer
The CT-7000 S2’s built-in 4.5-inch wide thermal
printer can print the breaker contact analysis re-
sults in both tabular and graphic formats.
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