Vanguard Instruments Company CT-6500 2 Series, Operating Instructions Manual

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CT-6500 Series 2 Operating Instructions
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9.2.1 Tabulated Results Interpretation
1. Timing Record is time and date stamped by the CT-6500.
2. Timing record header information (Company, Substation name, Circuit, etc) is also saved
with test record.
3. Timing test type (OPEN, CLOSE, O-C, C-O, O-C-O) is identified. A CLOSE timing shot is
shown in Figure12.0.
4. Contact channel #1 time is shown in both milliseconds and cycles. From Figure 12.0,
contact channel #1 time was 184.85 ms or 11.09 cycles.
5. Contact channel #1 bounce duration was 19.80 ms.
6. Contact channel #1 wipe was measured as 0.93 inches.
7. The slowest contact and fastest contact differential time is shown as contact delta, 1.15 ms.
8. Breaker contact stroke was measured as 7.08inches.
9. Contact velocity calculation was 8.18 feet per second.
10. Contact over-travel distance was measured as 0.33 inches.
11. Contact bounce-back distance was measured 0.24 inches.
12. Contact velocity calculation was from the two analysis points:
Analysis point # 1 was 1.00 inch from the fully closed position.
Analysis point # 2 was 2.00 inches from the fully closed position.
13. The DC power supply was monitored during the test. The nominal voltage was 55 Volts
and the minimum voltage was 50 Volts.
14. Initiate current was 6.2 Amperes.
15. Timing shot duration was one second.
16. Trigger mode was internal therefore the timing window starts at the same time when the
CT-6500 energized the circuit breaker.
17. There was no insertion resistor in the test, thus no insertion resistor time was measured.