DEVICE FOR PROTECTION OF IMMERSED ELECTRIC MOTOR Russian patent published in 2000 - IPC

FIELD: electric motors for oil mining pumps or pumps for removal of water from oil wells. SUBSTANCE: device has temperature detector, pressure detector, vibration detector, three capacitors, choke, relay contact, relay winding, rectifier, two control units, voltage source, low-pass filter, two commutators, scaling amplifier, which output is connected to input of regulation unit, pulse generator, two resistors, converter of voltage level into direct current level, converter of pressure to voltage level, converter of temperature to voltage level, converter of vibration to voltage level. EFFECT: increased reliability of immersed electric motor protection. 2 dwg