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Wittgen diode isolation rod 79364

Isolation diode: As the name suggests, it uses the principle of unidirectional conduction of diodes to isolate the conduction of voltage in a certain direction. Under normal circumstances, the forward conduction voltage of the isolation diode is between 0.6 and 0.8V (silicon diode).

Try to describe the fault phenomenon and treatment of isolating diode 260 and Varistor 269

Phenomena:

(1) Breakdown. The pressure reduction of the single brake pipe is slow, and only the sound of the balanced air cylinder exhaust is heard after the trailer, while the pressure does not decrease.

(2) Open circuit. There are no adverse phenomena.

Handling:

(1) Check that the reconnection electropneumatic valve 259 is powered on, and the isolation diode 260 can be removed to maintain operation.

(2) Can be left untreated for now, continue to operate and return to the depot for repair.

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