Traction transformer fault and processing method of the abnormal sound of the
One, the phenomenon of:
Transformer abnormal sound
Two, reason:
A) over voltage, over load, or large capacity electric locomotive start.
B) in the outer parts of traction transformer, loose resonance noise.
C) the abnormal sound caused by the external discharge.
D) or poor contact traction transformer internal insulation breakdown discharge.
E) electroacoustic put climate impact.
F) inter turn short circuit.
G) tap switch bad contact.
Three, treatment:
A) normal operation of traction transformer is uniform hum, observe the meter overload overcurrent
Pressure condition, indeed the over voltage or load, as the overload condition according to manufacturer or regulations overload allows time operation, at the same time, check the oil temperature cooling device is normal. Or to the electrically adjustable application load reduction. But still buzzing, just larger than the original, no noise. But it may also change sharply with load, show "cut cut cut, cut cut cut gap sound" assault. The sound with the transformer instrument (voltage meter, ammeter pointer to act at the same time).
B) screw clamping core caused by loose, abnormal sound of the causes of present amazing "hammer" and "wind" sound. Such as "Ding Ding Dang" and "call...... Call...... Voa. But the indicating instrument were normal, oil, oil temperature, oil level is normal.
C) transformer shell and other objects by impact. This is because the vibration of traction internal iron core transformer caused by other components, so that the contact of mutual impact. Such as the transformer is arranged on the control line shell or radiator hose and impact, showing the "falling" sound, continuous long gap characteristics, each department does not appear abnormal phenomenon of transformer. Then to find the sound source, on one side of the crime ring by hand or stick hold hear voice what changes, to determine the
D) discharge sound caused by external climate impact. As the fog, snow, snow caused the casing at the corona or glow discharge, showing "hissing", the voice of "Chi Chi", visible at night the little blue spark.
E) core fault cause. As the core grounding disconnect produce such as discharge of thunder, "core fire" will result in abnormal Wu sound
Inter turn short circuit caused by. Because of the short severe local fever, local boiling will usually purr. This kind of voice should pay special attention to.
F) switch fault. Because the tap switch bad contact, local heating will cause the sound like the inter turn short circuit caused by.
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