Meter case in the event of an accident before, usually there are unusual circumstances, we should at any time to monitor the operational status of the Meter case and check.
Run-time by the sound of the Meter case, vibration, odor, color, temperature, and phenomena such as changes in external conditions, to determine whether the abnormal, the cause of abnormal operation analysis, in order to take corresponding measures.
Normal operation of the Meter case should be continuous and uniform sound "buzzing" sound, if the non-uniform or belong to other sound anomalies. If you have a higher internal "buzzing" sound may be off-load operation, the situation can be identified according to the Meter case load and to strengthen surveillance. Within a short time, "wah-wah" sound may occur over-voltage grid, according to whether the ground signal, marking to determine whether the swing. If the Meter case discharge sound, may be casing or internal discharge phenomenon, which is a response to the Meter case for further testing or disabled. Meter case sound of water boiling, for the Meter case internal short-circuit fault or bad, should be immediately checked out. If the Meter case oil crackles, compared with an internal or surface Meter case insulation breakdown, this time should be checked out immediately.
