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Exhaust level control relay for well, with indication of "High Level" and "Lack of Water" for protection of submersible electric pumps against the lack of water.
Level control in conductive liquids by three probes (minimum, maximum and mass), with indication and protection of minimum level.
The contact "S1" weapon when the liquid level reaches the upper level probe (terminal S) (turns on green LED – "N.A." High level).
The "S1" contact is undone when the liquid level drops below the level of the lower level probe (terminal I) – turn off green LED "N.A." and turn on the red LED "F.A." (lack of water).
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