doble TDR9000 - Trip;Close Fuses; Figure B.19 Trip;Close Fuses

Trip/Close Fuses
B-28 72A-1898 Rev. A 11/01
Monday, November 26, 2001 1:09 pm
Trip/Close Fuses
Fuses for the Trip and Close coil currents are located on the TDR9000
Physical Front Panel, as shown in Figure B.19. The status of a Trip/Close
fuse is determined using the procedure for testing the Trip/Close function
given in ”Trip/Close Function Test” below.
Figure B.19 Trip/Close Fuses
Trip/Close Function
Tes t
The TDR9000 Trip/Close module is monitored during every test. If there
is an internal electronics problem, a run-time error is reported. These
run-time tests cannot test the cables, fuses, or the final high current stage
of the module.
N
OTE
Before running this test, run the Continuity test on the EHV or OCB
cables.
If a test is run and no errors are reported, and the circuit breaker does not
operate, this procedure isolates the cause of the failure to the Trip/Close
fuses or to the Breaker Control cable responsible for the Trip/Close
function or the Trip/Close module, unless the circuit breaker is defective.
Fuses can be checked by inspection. The cable can be checked with a
meter, but this is difficult if the pinout pattern is not known. This makes
the following procedure the quickest troubleshooting solution:
1. Connect the alligator clips of the Breaker (Trip/Close) Control cable
across the test clamps of an activated OCB or EHV cable.
Trip Fuse
Close Fuse