Greetings! Low insulation 440V has appeared, but this time it is difficult to detect because insulation appears for a short time and disappears. After two days of observations, it turned out that low insulation comes out twice a day, usually at lunchtime and at night.
We also noticed that when low insulation 440V comes out, the temperature of the meat refrigeration (freezer) chamber goes to INHIB in the alarm monitoring system in the ECR.
Greetings! Today we will analyze the sequence of actions of an electrician when finding the source of low 440V insulation on the vessel. In the previous article we looked at the first actions of the ETO when searching for low insulation 220V, I recommend reading that article first, because it is more detailed. And the search methods are not much different, but there are nuances.
Finding low 440V insulation on a vessel involves tripping the circuit breakers one at a time, starting with the non-critical consumers.
It may happen that the reason for low insulation is immediately known, because a 440V high pressure machine was started on the deck and perhaps it was flooded with water. But it happens that you cannot find the source on the first try.
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