
Universal Adapter
I-28
72A-1898 Rev. A 11/01
Monday
, November 26, 2001 1:09 pm
Open the close circuit knife blades and add the two clip-to-clip jumpers
as shown in Figure I.23 on page I-27. With the connection of the Close
initiate leads as shown, and the two additional clip-to-clip jumpers, the
test set now monitors and measures the current that flows in the closing
circuit without disabling any fusing or anti-pump protection.
The Close pulse length should be lengthened from the default value of
133.3 ms to approximately 300 ms to allow the close coil current to be
interrupted by the
X
relay contacts. This is done in the Command
Parameter portion of the Breaker Test Plan. If the same circuit is
employed for Trip-free, Reclose, or O-C-O tests, then their close pulses
should be lengthened accordingly.
The time from Close coil energization to Main Contact closure is
determined using the graphical results. The time from test initiation
(
X
relay energization) to Main Contact operation is tabulated and given in
the Test Results Report.
AN8: Simultaneous Energization of Two Sets of Trip Coils
in a Single Circuit Breaker
Many modern high voltage circuit breakers have two sets of trip coils that
may have independent sources of power. To energize both sets of trip
coils simultaneously from their respective power sources, without
electrically tying the battery banks together, proceed as follows:
1.
Connect the pair of trip leads to energize Trip Coil #1 and connect the
pair of close leads to energize Trip Coil #2. On the Breaker Test Plan,
Command Parameters, Trip-Free Parameters, select a Trip-Free Delay
of 0.0 msec.
2.
Close the circuit breaker. When the Trip-Free test is initiated, both the
Trip and the Close circuits are energized simultaneously.
3.
The Trip current for Trip Coil #1 is displayed as Trip Current on the
Breaker Performance Report and on the graphical results. Likewise,
the Trip Current for Trip Coil #2 is displayed as Close Current on the
Breaker Performance Report and on the graphical results.
If the circuit breaker opens, it has passed the test.
N
OTE
The Close Circuit current maximum range is 20 A.
Содержание TDR9000
Страница 26: ...xxii 72A 1898 Rev A 11 01 Monday November 26 2001 1 09 pm...
Страница 50: ...Step 5 Saving Test Results 1 24 72A 1898 Rev A 11 01 Monday November 26 2001 1 09 pm...
Страница 98: ...3 28 72A 1898 Rev A 11 01 Monday November 26 2001 1 09 pm...
Страница 200: ...Disconnecting After the Test 4 102 72A 1898 Rev A 11 01 Monday November 26 2001 1 09 pm...
Страница 362: ...B 34 72A 1898 Rev A 11 01 Monday November 26 2001 1 09 pm...
Страница 388: ...D 6 72A 1898 Rev A 11 01 Monday November 26 2001 1 09 pm...
Страница 392: ...E 4 72A 1898 Rev A 11 01 Monday November 26 2001 1 09 pm...
Страница 394: ...F 2 72A 1898 Rev A 11 01 Monday November 26 2001 1 09 pm...
Страница 442: ...I 32 72A 1898 Rev A 11 01 Monday November 26 2001 1 09 pm...
Страница 454: ...I 12 72A 1898 Rev A 11 01 Monday November 26 2001 1 09 pm...