Abstract: A meter junction box for enabling the safe, accurate and efficient measuring of components of multi-phase electric power includes two separate spaced enclosure housings. The two housings are interconnected by a plurality of electrically conductive, non-magnetic conduits which are environmentally sealed at each end thereof in a manner to secure the interior of each housing from the adverse effects of the environment. A single, insulating jacketed electrical conductor passes through each of the respective conduits from one of the housings to the other. The individual conduits provide a means whereby a hook-on type ammeter may be functionally and individually connected with the conduits to measure the current in the conductor passing therethrough.

Abstract: Disclosed is a frequency converter system for altering the frequency of a-c power supplied from a distribution network to a load, the system including a pair of mechanically coupled rotating alternating current machines, the alteration of the rate and direction of rotation of the prime mover altering the frequency of the power. A variable impedance network comprising saturable core reactors and connected in the rotor circuit of the prime mover is utilized to effect the change of rate and direction of prime mover rotation.

Abstract: Disclosed are a method and system for monitoring and controlling the normally inaccessible dynamic operating conditions, such as well fluid head and motor terminal voltage, of a well pumping operation, in response to monitored conditions at the top of the well. At the heart of the system is a computer having, stored therein, coded data representative of the fixed well, motor, and pump characteristics and programs defining the mathematical relationship between the stored fixed data, dynamic operating conditions of interest, and the monitored conditions. Feedback control for regulating the well fluid head and motor terminal voltage include the computer and uniquely designed frequency converter and line drop compensator apparatus.

Abstract: Disclosed is a voltage regulation-unbalanced voltage compensation control connected intermediate the supply and load of the polyphase system, the control including separately adjustable variable impedance elements provided by saturable core reactors for independently varying the voltage drops between the supply and load terminals for each phase. The independent adjustment of the variable impedance elements is effected by a feedback control network varying the magnitude of current supplied to the DC control winding of each saturable core reactor in response to the existing load voltages across the load terminals.

Abstract: Disclosed is a cable connector assembly consisting of telescopically mateable male and female connector portions having means such as spirally wound insulating band around the male extension and winding tubing associated with the female receptacle for establishing an indirect, elongated fluid path to electrically isolate the situs of conductive coupling between the male and female connectors. Sealing means are provided to exclude sediment and marine life from the assembly when it is disposed underwater and cable terminator housings are connected with both male and female assemblies.

Abstract: Negative sequence compensation apparatus for reducing, and thereafter minimizing the increase of, negative sequence currents flowing in a three phase motor includes variable impedance elements, and means for adjusting the impedance thereof, disposed in the motor supply lines. Alternate embodiments disclose saturable reactors as the variable impedance elements electrically connected with the supply terminals by way of alternate transformer connections.

Abstract: Motor protector apparatus for independently sensing the respective positive, negative, and zero sequence currents flowing in the supply lines to a three phase motor for interrupting power to the motor whenever such positive, negative, or zero sequence components reach levels indicative of abnormal operating conditions. The protector network includes bridge means for segregating the negative and positive sequence components, indicators for visually displaying the source of the abnormality, and means for restoring power to the motor after a defined time period.

Abstract: Motor protector apparatus for independently sensing the respective positive, negative, and zero sequence currents flowing in the supply lines to a three phase motor for interrupting power to the motor whenever such positive, negative, or zero sequence components reach levels indicative of abnormal operating conditions. The protector network includes bridge means for segregating the negative and positive sequence components, indicators for visually displaying the source of the abnormality, and means for restoring power to the motor after a defined time period.