Vanguard CT-7500 - Manual (Page 9)

MODEL CT-7500 OPERATING INSTRUCTIONS
Rev 2 Jan 2001
3
(e.g., Open-Close, Close-Open, Open-Close-Open) can be initiated with a programmable delay
time or by sensing the breaker's contact state.
Because solid-state switching is used in the initiate circuitry, the CT-7500 can switch a
breaker's ac or dc control circuit. Each trip and close circuit is protected by a 3-ampere fuse. The
initiate circuit is also protected by an interlock "ARM" switch.
2.2.7 Built-in Thermal Printer
A 4.5-inch wide thermal printer prints the breaker's contact analysis results in both tabular and
graphic formats.
2.2.8 Printer Port
A parallel printer port can drive a H-P color ink-jet printer, from which a color graphic of timing
charts and tabulated results can be printed on 8½-11-inch paper.
An Ink-Jet printer is supplied with each CT-7500.
2.2.9 Computer Interface Capabilities
A built-in RS-232C port lets timing shots stored in CT-7500 EEPROMs to be down-loaded to an
IBM-compatible PC. Windows-based (Windows 95, Windows 98, Windows Me, Windows 2000,
and Windows NT) Breaker Analysis Software is supplied with the CT-7500. This software allows
the user to:
„ Time Circuit breakers from a PC.
„ Retrieve timing shots stored in CT-7500.
„ Recall timing shots from a hard drive for re-analysis (at an office PC).
„ Create breaker test plans on a PC and load into the CT-7500.
2.2.10 Timing Shots Storage Capabilities
The CT-7500 uses Electrical Erasable PROMs (EEPROM) to store timing-shot data. Unlike
other media, EEPROMs are immune to temperature, shock, and humidity. Stored shots can be
recalled to reanalyze test data, to re-print test reports, or transfer data to an IBM compatible PC
for record keeping. Up to 200 timing shots can be stored in the EEPROMs. The number of shots
stored in EEPROMs can vary, depending on the size of the shot records.
2.2.11 Breaker Test Plan Storage Abilities
Up to 45 breaker’s test plans can be stored in the CT-7500. Test plans comprise breaker
specifications (i.e., stroke, velocity, contact time). By recalling and using a test plan, operators
can immediately test breakers and view a pass/fail report (made by comparing test performance
with specifications in the test plan). Breaker specifications need not be referenced to compare
test results to determine if a breaker passed.
A breaker test plan can be created by using the Breaker Analysis Software (supplied with each
CT-7500). The test plan is then loaded into the CT-7500 via an RS-232C serial port.
2.2.12 Diagnostic Capabilities
The CT-7500 can run diagnostics on its own electronics. Self-testing of contact cable hook-ups
and transducers lets users checkout CT-7500 accessories whenever verification is required.