Abstract: Power distribution apparatus include a rack mountable housing, an electrical power input assembly and an electrical power output assembly including a plurality of external circuits adapted for hardwired to remote equipment and a plurality of internal circuits each adapted to receive a plug of electrical equipment and to provide power thereto. The plurality of internal circuits may include differently configured receptacles adapted to receive differently configured plugs.

Abstract: A control system for a pool and spa. Main line voltage is provided through a single line voltage service and a single ground fault circuit interrupter circuit, facilitating a ground fault test and simplifying installation. The control system acts as a power distribution system for controlling the pool and spa equipment, with a circuit board assembly including individual fuse protection devices and switching circuits. A test algorithm is included, wherein the control system is disabled from normal operation if the GFCI test fails. The pool operator manually enters a water fill command, and the controller system automatically opens the fill valve for a predetermined time interval, and then automatically closes the valve. An emergency disconnect switch is mounted near the bathing area, connected by low voltage wiring to the controller system cabinet. The controller system senses the emergency switch closure and disconnects line voltage to the line voltage loads.

Abstract: The present invention discloses a self-stabilizing heat exhaust system including at least several rate-variable fans. Each of the rate-variable fans further includes a power-input terminal for inputting power to the rate-variable fans; a grounded terminal for providing the rate-variable fan a lower level; a signal-output terminal coupled to an adjacent rate-variable fan for outputting a speed signal which may be a normal signal or an abnormal signal; a signal-input terminal coupled to another adjacent rate-variable fan for receiving the speed signal; and a control circuit responding to the abnormal signal to make the rate-variable fan rotate at the higher rotation rate and responding to the normal signal to make the rate-variable fan rotate at the lower rotation rate.

Abstract: A locking device for a lock has a bolt movable which is lockable and unlockable, a guide for receiving the bolt in a locked position, a latching device which secures the bolt in the locked position against unlocking, a first electrical switch for monitoring a position of the bolt and a second electrical switch for monitoring a position of the latching device, the first electrical switch with the bolt and the second electrical switch with the latching device being mechanically coupled, and a control unit with which the first and second electrical switches are connectable via a first and a second electrical connection.

Abstract: A power supply interface device for supplying 110 volt power to an electrical device.

Abstract: A directed energy beam system uses an ultra-fast laser system, such as one using a titanium-sapphire infrared laser to produce a thin ionizing beam through the atmosphere. The beam is moved in either a circular or rectangular fashion to produce a conductive shell to act as a waveguide for microwave energy. Because the waveguide is produced by a plasma it is called a plasma beam waveguide. The directed energy beam system can be used as a weapon, to provide power to an unmanned aerial vehicle (UAV) such as for providing communications in a cellular telephone system, or as an ultra-precise radar system.

Abstract: A repeater, useable for connecting switches in a data communication network, is provided in a distributed and/or modular fashion. The repeater includes a plurality of separate and distinct components or modules connected to or at least partially housed in, the various switches which the repeater modules couple. Preferably, the repeater autodetects and/or autoconfigures some or all aspects of repeater operations, such as detecting and/or configuring in response to appropriate or approved cable-type connections. A conductive, sealing member on a cable connector substantially reduces or eliminates EMI.

Abstract: A power supply circuit comprises a pre-regulator circuit (20) including an energy store (19). A control circuit (4) controls the current flow from a battery (18), creating an intermittent supply of current to the energy store (19) from which current is supplied to a voltage regulator (7) and application circuit (2, 4, 5, 6, 8 and 9). The energy store may be bypassed when desired, for example to maximise efficiency when the battery is approaching the end of its useful life.

Abstract: A position indicator for step switches and tap selectors of transformers and the like has a contact array connected to the motor drive and connected by a plug to the plug of a connector which, in turn, is connected by plugs to the information-generating module which outputs to the display. One of the pairs of plugs between the contact array and the connector or between the connector and the module can be reversed relative to the other to signal a different sense of rotation of the motor drive.

Abstract: An interface adaptor is provided between the locomotive MU cable and the ECP trainline permitting ECP data from the lead locomotive to be transmitted via the MU cable on trailing locomotives to a train of ECP cars. On the lead locomotive, the HEU Echelon interface is on a suitable line in the MU cable instead of the separate ECP trainline such the trailing locomotives do not require a separate ECP trainline. The adapter generally employs two transceivers configured as back-to-back repeaters to bridge ECP data between the locomotive MU cable and the ECP trainline. A DC--DC converter can be used to provide the ECP trainline voltage, either as 230 VDC or as a lower voltage. In lower voltage systems the converter may be replaced by a voltage regulator, or may be eliminated. In any case, an inductor is employed on the output to provide a high impedance to the overlay transceiver.

Abstract: The switchgear comprises a circuit breaker having an open position for isolating a generator from the network, and a closed position for connecting the generator to the network, together with a disconnector having a fixed pole connected to the generator and a contact connected to the fixed pole and movable relative thereto to occupy, when the circuit breaker is open, a first position connecting the generator to a starter circuit and a second position connecting the generator to ground. The moving contact of the disconnector also possesses a third position in which it forms an equipotential appendix for the fixed pole when the circuit breaker is closed. The moving contact does not carry the steady electric current of the generator, thus making it possible advantageously to reduce its dimensions so that they are capable merely of withstanding transient electrical conditions when in the first and third positions.

Abstract: A power transfer device adapted for interconnection with the electrical system of a building includes a cabinet, a set of switches mounted to the cabinet, and a first set of wires for connecting the switches to an electrical distribution panel associated with the building electrical system. The power transfer device includes a terminal compartment associated with the cabinet, a set of power input terminals located within the terminal compartment, and a cover removably connected to the cabinet for alternatively preventing and permitting access to the terminal compartment. The cover is provided with an optional meter arrangement adapted to be interconnected with the power input terminals for selectively measuring levels of power provided from a source of auxiliary power connected to the power input terminals.

Abstract: This invention relates to the field of electrical technology, and relates particularly to a method for the continuous transformation of electrical energy with its subsequent transmission from an initial source (transformer) to a consuming device, and also to an apparatus for the implementation of this method of transformation and the supplying of power to electrical devices through a transmission line which does not form a closed circuit, ie consists of a single conducting wire.

Abstract: A quick start unit for charging dead batteries and starting vehicles. The quick start unit includes a small portable base platform with a handle to pull, push, or maneuver. The base platform is substantially flat and is suitably mounted on three wheels. A control panel is mounted on the platform via a vertical mount. A low horsepower gasoline engine is mounted on the platform and has an output shaft to which an input shaft of one or two alternators are coupled for rotation. The control panel includes a 12-volt push button, one 12-volt two position power toggle switch, one 12-volt tow or three position alternator toggle switch, one or two amperage gauges, two voltage gauges, a green indicator light, an amber indicator light, a red indicator light, and an audible alarm.

Abstract: A method for controlling the transmission of information between electronic components in a motor vehicle, which components can be either data sources or data sinks, in which a cascade design is used to facilitate the transmission of information. By separating the control signal from the actual streams of data, a flexible, chain type of structure is obtained.

Abstract: A switch-off device for airport series circuits (2) has input terminals (3, 4) which are connected to a current source (1). It also has output terminals (5, 6) which are connected to a series circuit (2) and connecting elements (7, 8) by means of which the input terminals (3, 4) and the output terminals (5, 6) can be connected to one another. The switch-off device has an actuator (11) for the purpose of simplifying operation and permitting a plurality of different, clearly visible operating states. In a normal position, the actuator positions the connecting elements (7, 8) such that each input terminal (3, 4) is connected to an output terminal (5, 6). In a service position, it positions the connecting elements (7, 8) so that the input terminals (3, 4) are disconnected from the output terminals (5, 6) and are connected to a grounding terminal (9), while the output terminals (5, 6) are connected to one another and to the grounding terminal (9).

Abstract: An electronic circuit arrangement automatically provides an energizing current to a solenoid for ejecting a plug from an outlet coupled to a source of supply voltage upon substantial cessation of current flow being drawn by an appliance by way of the plug while the supply voltage is present. The energizing current is controlled by a controlled switching device. An optional keyed plug is utilizable for selectively enabling operation of the solenoid.

Abstract: The invention provides a device for the transmission of data between two terminals in which a portion of the body of a living being completes the data transmission circuit. A first terminal is to be worn by a body of a living being, and an interface is provided for coupling of data signals into the body and/or for coupling them out of the body. A second terminal has a touch-sensitive interface by way of which, in the case of a contact by the body wearing the first terminal, it couples data signals coupled into the body out of the body and/or couples data signals into the body. According to the invention, the interface of the first terminal has a first pair of electrodes which are to be arranged at mutually spaced points of the body, and the interface of the second terminal has a second pair of touch-sensitive electrodes which are to be touched by two other mutually spaced points of the body.

Abstract: An apparatus and method for enabling the creation of multiple extended conduction paths in the atmosphere including a chirped-pulse amplification laser system having a high peak-power laser capable of transmitting through the atmosphere a high-peak power ultrashort laser pulse. The laser pulse is configured to have a rough spacial profile and is of sufficient energy to create multiple electrically conductive ionized channels in the atmosphere.

Abstract: This device is for the creation of independance from human instruction using a self-contained, wearable electronic device and automatic presentations of prerecorded audio and, or audiovisual information at predesignated, beneficial times. Messages can be presented in easily understood parts and at a rate comfortable to the user. The simulating messages containing any useful combinations of human voice, visual imagery, musical tones, ect., can be automatically presented an appropriate number of times for the given user. The device also concerns power savings in multiple circuit systems such that circuits of varying power requirements, as defined by their functionality, are able to deactivate each other for the express purpose of power conservation. In the case of separate batteries per circuit, low power circuits do not drain power away from the batteries of other circuits that require their batteries to provide high bursts of power for short intervals of time.

Abstract: A load bank is constructed using a plurality of tubes made from electrica conductive material and a fluid system that supplies cooling fluid to the tubes. Each of a plurality of electrically conductive clamps is selectively positioned to electrically connect at least two of the tubes in a spaced apart parallel relationship. Each clamp can be adjusted in terms of the amount of force applied to the tubes it connects so that positioning of each clamp is adjustable along the length of the connected tubes. A combination of the clamps and the tubes form an electrically resistive current-carrying circuit that serves as the load for a power source while the cooling fluid serves to dissipate the heat generated in the load.

Abstract: An apparatus and method for handling the connection/disconnection transition period of a printed circuit board to an actively empowered backplane which eliminates damaging surge currents and glitches by the use of temporarily functioning field effect transistor circuits which gradiently handle the current loads during the transition period. A set of specifically sized and predetermined lengths of connecting pins on the backplane insures that a programmed sequence of power connection and/or disconnection will occur which permits a group of field effect transistors to gradiently carry the changing current loads that occur during the insertion of the printed circuit board into the backplane. Likewise, during extraction of the printed circuit board from the backplane, the group of FETs (Field Effect Transistors) will carry and buffer the changing current loads from de-stabilizing the power supply source unit.

Abstract: A collection assembly adapted to attract and collect lightning from the atmosphere and channel electrical energy therefrom through a conductor to a storage facility defined by an extremely large coil housed within a congruently configured trench formed in the ground wherein the storage coil is formed of a superconductive material. A first conductive pathway serves to interconnect the collection facility defined by the lightning attracting structure to the storage coil. A second conductive path serves to interconnect the storage coil to a power take-off means which may be standard and conventional power lines directing current to areas of practical application. Both the first and second conductive paths are preferably formed of superconductive material.

Abstract: A self reconfigurable cellular robotic system comprises cells having arms which can be independently extended and retracted in both directions along three orthogonal axes by actuators and coupling member at the distal ends of the arms for coupling adjacent cells. The arrangement of the cells can be modified by extending and retracting the arms and coupling and uncoupling the coupling members.

Abstract: The present invention relates to a power supply interface for a mobile telephone powered from a battery whose terminal voltage is greater than the maximum supply voltage of the mobile telephone. The invention is characterized by a resistive cable (4) which is wound helically and which is connected between an electrical contact (5) on a voltage supply source and an electronic unit mounted in a housing (6). The electronic unit includes a voltage regulator which delivers a controlled output voltage. The resistance of the cable shall exhibit certain conditions and shall have a length which is adapted to the resistance such that when at maximum load the mobile telephone will only be heated to a moderate extent; a maximum temperature of about 50.degree. C., preferably 35.degree. C., is intended.

Abstract: The disclosed invention achieves a proper speed control of a sheet feeding motor for a serial printer that uses an astable power supply with a simple operation irrespective of variations in power supply voltage. The invention provides a method of and an apparatus for controlling the frequency of a sheet feeding pulse motor for a printer in accordance with the power supply voltage during sheet feeding.

Abstract: A two-channel forked fail-safe light barrier generates shaft position information in the region of the floors for the premature opening of the doors on arrival of an elevator car and includes a cyclical dynamic self-monitoring circuit by means of which a prophylactic fault recognition is possible. The self-monitoring circuit is responsive to the arrival and standstill of the car at a floor and periodically simulates genuine operational sequences as a brief emergence of the switching vane by an optical short-circuit of the fail-safe light barrier. The simulation effects interruption of the light barrier relay power which is, however, shorter than the release time of the relays so that the relays do not release when the circuit is intact.

Abstract: An apparatus for coupling AC electrical energy from a stationary source to a moving electrical device includes an input for receiving a source of AC electrical energy. The apparatus also includes a stationary, electrically-conductive plate and a moveable, electrically-conductive plate which is proximate to the stationary plate. A power consuming electrical device is electrically connected to the moveable plate. The invention couples energy from the AC source to the power consuming device by means of a capacitive link established between the stationary plate and the moveable plate. In preferred embodiments of the invention, the power consuming device comprises a neon tube or an electrical motor.

Abstract: An electrical interface circuit (200), for use with a zirconium dioxide sensor (202), includes an input differential amplifier (208) having its inverting input coupled to the circuit input (204) to receive a sensor voltage relative to sensor ground potential, and having its output coupled to the circuit output (210) to produce an output voltage relative to circuit ground potential. Additionally a feedback differential amplifier (214) has its inverting input coupled to the circuit output (210), its non-inverting input coupled to sensor ground potential, and its output coupled to the non-inverting input of the input differential amplifier (208) so that voltage change at the circuit input due to change of sensor ground potential relative to circuit ground potential is substantially cancelled.

Abstract: A power supply device has its power supply conductor bars, in which a.c. currents caused by a.c. noises flow in the same direction, laid closely in parallel while retaining their insulation thereby to increase the total inductance so that the impedance increases without accompanied by an increase in the d.c. resistance of the power supply conductor bars. An increased coupling impedance of the power supply conductor bars effectively attenuates the a.c. noises from d.c. power units, which then supply d.c. power with reduced a.c. noises to an electronic apparatus such as a computer through the power supply device.

Abstract: An unplugging apparatus includes an electrical sensing circuit for sensing the approach of an electrical storm, and a mechanical actuator for disconnecting a power cord plug from a receptacle in response to a signal from the sensing circuit. The sensing circuit and the mechanical actuator are mounted within a housing. A pull cord extends from the housing and is connected to the power cord plug to disconnect the plug from the receptacle. The other end of the pull cord is connected to a pivotable trigger arm, which pivots to pull the pull cord in response to activation by the sensing circuit. A coil spring biases the trigger arm so as to pull the pull cord, and a latch is operable to retain the trigger arm until actuated by the sensing circuit. A solenid is energized to operate the latch and release the trigger arm, by a signal from the sensing circuit. The sensing circuit includes a detector circuit which receives static produced by lightning in the form of radio waves.

Abstract: A power supply board for connecting dry communication lines from a remote station to the electronic equipment at a power station and includes a brushless PM motor mounted in a motor section of the board. The motor is powered by a station-derived low voltage direct current source provided at the power station. A brushless PM generator is mounted in a spaced alternator section on the board. The motor and generator shafts are connected by a flexible tube for generating a voltage suitable for operating of the electronic equipment at the power station. An integrated motor drive circuit is mounted on the motor section and connected to the D.C. source via a protective circuit. The motor has a bank of Hall cell sensors for generating position control signals to the circuit for sequential energization of the three phase motor winding. The output of the alternator is rectified to establish an output voltage for operating the communication equipment.

Abstract: An input/output circuit for performing tests prior to controlling an electrical load (2) which is decoupled by a transformer (5). An input (E) thereto acts on a first switching member (6) connected in series with a primary winding of the transformer in a power supply circuit for said primary winding. An output (S) provides a signal on the basis of the voltage present across the terminals of an output resistor (7) connected in series with the primary winding of the transformer in the power supply circuit of said winding. A second switching member (3) is inserted in series with the load in a power supply circuit for said load, and is controlled from the input to the input/output circuit via the transformer and a rectifier circuit (10) connected to the terminals of a secondary winding of the transformer. An impedance-switching circuit (13, 16) is connected to the terminals of the second winding in order to act on the input/output circuit by changing the voltage across the terminals of its output resistor.

Abstract: A current carrying wire is provided with a tubular shield construction which essentially covers the wire with conductive material, and preferably emulates a classical Faraday shield. The shield is formed of a multiplicity of insulated shield wires for minimized eddy current loss. When such a shielded wire construction is formed into a primary winding of a power transformer for a switching power supply, the secondary circuit is protected from electric shock hazards while enabling use of a gap free toroidal core for close coupling between primary and secondary windings. In another embodiment, such shields are used on both the primary and secondary windings of a matching transformer and are arranged for common mode rejection of noise associated with low power data signals.

Abstract: A rear module wall before a burn-in system that provides burn-in boards for electronic components to permit passing connections through slots while maintaining a good heat seal. The module rear wall is a sandwich type construction of a plurality of layers with insulating silicon rubber sandwiched between slotted backing sheets to provide for double insulation for the boards as then are slid through the slots from the interior of the oven into a tempered zone or to the exterior where they are connected to driver receiver boards and other connections.

Abstract: A data processing system is shown packaged in an enclosure wherein the system frame or chassis and a cable carrier are separately fabricated and thereafter merged to provide an enclosure with open ends and a central cable carrier that mounts connections for the system components. The system components are slideably received by the enclosure and are self docking as the electrical connections with the system power and signal lines are completed as the components arrive at the fully inserted, latched position. Keying means are also provided to require the user to install the components at both the correct location and with the correct orientation.

Abstract: A stairway wheelchair lift includes a stationary motor drive unit, a mobile platform movable along a stairway and a user interface for receiving user-generated input commands. The mobile platform communicates with the motor drive unit through a continuously maintained broadbeam infrared communications link, while the motor drive unit communicates with the mobile platform through an intermittently established short range infrared link. The user interface communicates with the motor drive through a hard wired four conductor communicates link. The use of infrared communications links, together with the four conductor hard wired link, reduces overall system wiring, enhances ease of installation and improves overall system flexibility and economy. Microprocessor based micro-controllers, within the motor drive unit, the mobile platform and the user interface, permit system operation to be tailored in accordance with the operating constraints and requirements imposed by a particular stairway configuration.

Abstract: A burn-in board construction mounts and provides operational signals to circuit packages, for example, digital devices in an environmental stress operation such as in an oven/chamber for dynamic burn-in. Each of the circuit packages has connections to circuits and which connections are connected to conductors on the burn-in board. At least one auxiliary board is mounted on a main burn-in board and carries contacts to double the number of test connections for digital devices on such burn-in board without changing the basic mounting or environmental chamber construction. The construction permits two 128 pin driver/receiver boards of standard design to be connected to each burn-in board module. This permits coupling several hundred driver connections to a single burn-in board while still utilizing standard connectors as the interconnects.

Abstract: A pulsed transformer utilizing the transition of the primary winding from a superconducting state to a normal state to increase the efficiency of energy transfer to the secondary winding thereof and hence to a load across the secondary winding. The primary winding is constructed as a composite which has minimal resistance when in a superconductive state and significantly higher resistance when in a normal or critical state.

Abstract: This invention relates to a type of multi-function automatic revolving Christmas tree base. Its rotation directions can be changed automatically by means of a DC motor transmission to drive the revolving cylinder of the Christmas tree, which drives a two-way exchanging mechanism to change the polarities of the input current from the DC motor, so that the DC motor can rotate in positive and reverse directions. On the outer walls of the revolving cylinder are two conductive copper collars in connection with outer power source. Part of the two conductive copper collars is extending upwards through the wall of the revolving cylinder and in connection with another socket, which can serve as the power source of the lamps on the Christmas tree. Therefore, when Christmas tree is turning in one direction, there is no worry of the winding and knotting of the power cords.

Abstract: A staged switch for conducting a large electrical current for an indefinite time period and then rapidly switching the current into a load circuit. The switch comprises a first stage which can conduct a large electrical current for an indefinite time period without damage to the stage and a second stage which is a fast-opening element. The first stage includes primary and secondary contacts wherein the primary contacts conduct a charging current and the secondary contacts divert the current into the fast-opening second stage. The secondary contacts "make" before the primary contacts "break", reducing the damage to the contacts which might otherwise be experienced. The second stage is a low-inductance element which reduces the level of energy absorbed by the first-stage contacts, minimizing damage to the contacts. The second-stage element may be constructed in a cartridge and may be loaded into the switch using an autoloader device.

Abstract: A conductor rail assembly parallel to an aircraft passenger seat track is coupled by direct electrical connection to the aircraft passenger entertainment system power supply. Passenger seat entertainment system power connectors are inserted into and retained in the conductor rail assembly to distribute power to the individual seat receivers.

Abstract: A cordless power-operated device, such as a saw 20, is powered by a low level D.C. voltage provided by battery pack cells to operate the saw in a cordless mode. The cells are housed in a container 32 which fits into a cavity 23 formed in a housing 22 of saw 20. Another container 66 includes a first section 64 which is shaped externally in the same configuration as container 32. First section 64 houses a voltage converter 62 which converts conventional A.C. voltage, such as 120 volts at 60 Hz, to the low level D.C. voltage required to operate saw 20. Container 66 can be inserted into cavity 23 of saw 20 and voltage converter 62 can be connected to a conventional A.C. source to operate the saw in a corded mode. Container 66 also includes a second section 68 which houses a cooling motor 70. Cooling motor 70 provides powered cooling of saw motor 28, the cooling motor and voltage converter 62.

Abstract: A modular power controller assembly is described for providing the application of power to resistive loads. The controller assembly comprises an enclosure for mounting controller modules, one or more modular heat-sinks, a plurality of SCR modules arranged in sets with each set on a corresponding heat sink, a timer board for controlling the percentage of time in the on-condition, and a driver board for switching each set of SCR modules. The timer board provides a controlled signal which optocoupled at the driver board with the gate of the corresponding SCR module. The SCR's switching is conducted at the zero cross over level thereby avoiding radio frequency interference.

Abstract: A line condition sensing device, e.g. a current transformer and/or a voltage transformer, is embedded in a pole mounted, power line supporting insulator to form an integral unit therewith. One end of the insulator carries a pole mounting base. The other end of the insulator carries a power line receiving clamp. The line condition sensing device is connected in parallel with a hot power line by taps to permit conditions to be monitored without cutting or dead ending the line. The device is installed on a hot line by opening the power line receiving clamp of the original insulator, holding the power line in spaced relationship from the original insulator while replacing it with the new insulator, resecuring the power line on the clamp of the new insulator, and then connecting the taps to the hot power line.

Abstract: The high-voltage transformer of the invention is clipped on to its high-voltage lead-out cables. The ends of these cables are held firmly in conductive pads in ducts moulded with the coating of the transformer coil.

Abstract: A pendent assembly is disclosed for suspending from a hospital room ceiling to provide various services used in a hospital operating room. The pendent has a distribution head with outlets for such services, including, for example, electrical, gas and vacuum outlets and which is moveable upwardly and downwardly through a motive means operated by personnel using the pendant. An automatic stop mechanism is included and which comprises one or more sets of electrical contacts interposed between upper and lower housings in the distribution head. The lower housing is suspended from the upper housing at a predetermined distance therefrom and is moveable over that predetermined distance with respect to the upper housing. When the distribution head is lowered such that it encounters an obstruction, the lower head is forced upwardly and the contacts between the housings contact each other to complete an electrical circuit.

Abstract: Devices and methods are provided for improving the operation of the on-board generator during use of air-conditioning in motor homes so the generator runs only when the thermostat demands the A/C unit(s) to run, as opposed to conventional motor-home A/C systems that require running of the generator even during intermittent shut-downs of the A/C unit(s). Such devices are formed of a plurality of time-delay relays connected with additional components in a unique arrangement with typical motor home electrical wiring, thermostat, A/C unit(s) and generator.

Abstract: A source of DC electrical power (A) provides DC electrical power to a power transmission cable (B) which extends to a remote location, such as a subsea module (D). The power transmission cable is connected with a pair of rectifiers (20a, 20b), each allowing only power of a selected polarity to be passed thereby. A pair of DC to AC inverters (24a, 24b) convert the received electrical power to high frequency square waves which are applied across primary windings (32a, 32b) of inductive couplers (30a, 30b). Secondary windings (38a, 38b) of the inductive couplers convey the AC electrical power to remote module rectifiers (40a, 40a) for providing DC electrical power to the subsea module. In this manner, DC electrical power is transmitted along the power transmission cable to reduce interference and crosstalk, yet the electric power is transmitted across an inductive coupler to facilitate safe separation of the remote module from the power transmission cable.

Abstract: An electric motor is connected to a power supply by a quick-disconnect cable connector which can be detachably connected to a terminal box of the motor. In one form of the invention, a protective cover is detachably mounted on the terminal box over the cable connector so that the cable connector can not be connected or disconnected without first removing the protective cover. A sensor detects the state of mounting of the protective cover and produces a corresponding output signal, on the basis of which a control circuit automatically electrically disconnects the cable connector from the power supply of the motor when the protective cover is removed from the terminal box. In another form of the invention, the motor is a pole change motor which can operate with either a first number of poles or a second number of poles. The terminal box has a first terminal corresponding to the first number of poles and a second terminal corresponding to the second number of poles.