Vanguard CT-8000 S3 - Manual (Page 130)

CT-8000 S3 USER’S MANUAL REV 1
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4.5 Troubleshooting Guide
PROBLEM DESCRIPTION Suggested Solution
CT-8000 S3 will neither trip nor
close the breaker. • Make sure you hold down the [ARM] switch during each test.
• Check the OPEN or CLOSE fuses.
• Check the initiate leads.
o
For a “Positive Trip” circuit, one CLOSE lead and one OPEN
lead should be connected to the positive side of the power
supply.
o
For a “Negative Trip” circuit, one CLOSE lead and one OPEN
lead should be connected to the negative side of the power
supply.
Getting following message when
using external trigger: • Trigger voltage was not detected by the CT-8000 S3.
• Check the external trigger input to the CT-8000 S3.
• Make sure the external trigger signal is present when the CT-8000
S3 displays the “AWAITING TRIGGER” message on the screen.
Missing timing or transducer
channels on report and graphic
output. • Timing or transducer channels were not turned on. See section
3.2.7 for instructions on how to turn on the contact and
transducer channels.
No contact time (0 ms) in Trip or
CLOSE test. • Make sure only one side of the breaker is grounded.
• Make sure the breaker operates on the OPEN or CLOSE test only.
A dual operation OPEN-CLOSE or CLOSE-OPEN will result in a 0ms
reading.
• The CT-8000 S3 contact channels may be damaged or the cables
may be bad. Try the “Check Hook-UP” test (see section 4.3).
No contact time (0 ms) in CLOSE-
OPEN test. • Make sure the breaker contacts complete the transition from the
OPEN (initial state) to the CLOSE state, then to the OPEN (final
state). You can see the transition by looking at the timing chart.
• Make sure the contact CLOSE state is longer than 10ms. The CT-
8000 S3 has a 10ms de-bounce time so any contact state less than
or equal to 10ms is invalid.
• Try the CLOSE-OPEN test using contact channel #1.
TRIGGER FAULT
NO TRIGGER