FIELD: automatic control of submersible motor-pump units with aid of level sensors mounted in water tower tanks.
SUBSTANCE: proposed relay-type device has its sensor contacts directly connected to power circuit of relay coils. It has electric-contact level sensor and two auxiliary relays. Inserted in power circuit of one relay coil are upper level contacts of sensor and to power circuit of other relay coil, lower level contacts of sensor. Motor-pump unit incorporates provision for eliminating its transfer to operation at high-frequency automatic turn-on mode upon occurrence of trouble in lower level contact circuit of sensor.
EFFECT: enhanced reliability of motor-pump unit control.
1 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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|
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|
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|
SU1504714A1 |
