FIELD: electricity.
SUBSTANCE: device for protection of the submersible electric pump from dry run contains a water level sensor (5) in a source -well (3), located above the electric pump (2) and acting on the executive body (4) connected to the power supply circuit (1) of the electric pump (2). The level sensor (5) contains series connected the magnetic reed switch (9) and the resistor (8), connected between the phase wire and "earth", and the magnet (13) fixed on the float (12) with a possibility of disconnection of the magnetic reed switch (9) at emersion of the float (12). The executive body (4) reacts to the current of leakage from the power supply circuit (1) of the electric pump (2) to "earth".
EFFECT: improvement of reliability of the electric pump protection.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ELECTRIC MOTOR PROTECTIVE GEAR | 2004 |
|
RU2291538C2 |
| DEVICE FOR PROTECTIVE DISCONNECTIONS IN A C ELECTRIC POWER SYSTEM WITH SOLIDLY GROUNDED NEUTRAL | 1991 |
|
RU2007812C1 |
| DEVICE FOR PROTECTING ELECTRIC MOTOR OF SUBMERSIBLE PUMP AGAINST OVERLOADING | 2005 |
|
RU2309298C2 |
| DRY-RUNNING PROTECTIVE DEVICE FOR SUBMERSIBLE PUMP-UNIT MOTOR | 2001 |
|
RU2184414C1 |
| DEVICE FOR PROTECTING ELECTRIC MOTOR OF SUBMERSIBLE ELECTRIC PUMP AGAINST OVERLOAD AND "DRY STROKE" | 2009 |
|
RU2397588C1 |
| DEVICE FOR DIFFERENTIAL PROTECTION OF CONVERTING INSTALLATION | 0 |
|
SU1319154A1 |
| ELECTRIC MOTOR AND DRIVEN EQUIPMENT PROTECTIVE DEVICE | 2003 |
|
RU2263383C1 |
| DEVICE FOR PROTECTING SUBMERSIBLE ELECTRIC MOTOR FROM DAMAGE | 0 |
|
SU928513A1 |
| OFF-OPERATION PROTECTIVE GEAR FOR GROUNDED-NEUTRAL AC MAINS | 1994 |
|
RU2088011C1 |
| METHOD FOR SINGLE-PHASE-TO-GROUND FAULT PROTECTION OF THREE-PHASE, INSULATED-NEUTRAL SUPPLY MAINS | 1995 |
|
RU2121744C1 |
