doble TDR9000, User Manual, Page: 63 / 454

TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01 2-13
Monday
, November 26, 2001 1:09 pm
Trip (O)
Figure 2.8 shows a simplified version of the test waveform generated for
the Trip/First Trip test.
Figure 2.8 Trip Command Pulse
Command
Parameter Trip Pulse This time setting determines the duration of the
Trip Pulse sent to operate the trip circuit of the
circuit breaker.
Recording Length This setting determines the recording length and
implicitly sets the sampling rate at which recording
is performed.
Table 2.2 Circuit Breaker Test Types
Test Initial State Intermediate Final State
State 1 State 2
Trip (O)/First Trip (O) Closed — — Open
Close (C)/First Close (C) Open — — Closed
Reclose (O-C) Closed Open Closed
Trip Free (C-O) Open Closed — Open
O-C-O Closed Open Closed Open
Slow Close (C) Open — — Closed
Continuity This test checks the continuity of contact connections. The circuit
breaker is not operated.
Capacitance This test checks the capacitance characteristics of the grading
capacitors connected across the Main Contact of a circuit breaker.
The circuit breaker must be open, but is not operated during the test.
Self-Diag. This test checks Instrument measurement channel operation by
performing test emulations. The circuit breaker does not operate.
66 msec
On
Off