Background Image

Products

RM Power

Remote power monitor with load center.

LCM

Load center monitor.

GEN III

42V GEN III Arc Protection.

Load Generator

 Testing and simulation of loads.

Patents

  • Patent US4949214A

    Patent number: US4949214A

    Abstract: An automatic override circuit is responsive to the magnitude of instantaneous current flow through a monitored conductor to produce an output signal which can actuate a solenoid or a ground fault interrupter to automatically trip a circuit breaker in repsonse to an excursion of current flow which exceeds a predetermined maximum current overhead level. The short circuit protector can automatically override a thermal trip delay and cause the circuit breaker to trip instantly or delay tripping for a prescribed period of short circuit events which exceed the maximum current overload level. In one embodiment, a control signal is generated which actuates a solenoid which is coupled to a thermal magnetic circuit breaker. In an alternative embodiment, the control signal is utilized for automatically triggering a ground fault interrupter. In both embodiments, the power distribution circuit is interrupted in response to a short circuit condition which would otherwise be tolerated during the thermal trip delay of a conventional circuit breaker.
    Type: Emergency Protective Circuit
    Filed: August 28, 1989
    Date of Patent: August 14, 1990
    Inventor: George Auther Spencer

  • Patent US5875087

    Patent number: US5875087

    Abstract: A digitally controlled circuit breaker includes a conventional thermal circuit breaker (10) which is controlled by a solenoid (16) to override the thermal aspect thereof. The solenoid (16) is controlled by a digital processing section (20). The digital processing section (20) has a digital control module (22) with multiple profile tables associated therewith. The profile tables allow the digital control module (22) to compare a sensed current from a sensor (24) with a predetermined current value as a function of time and to generate the control signal for the solenoid (16) if the sensed current exceeds that in the profile. The profiles can optionally be downloaded to the module (22) through a serial communication port (36). The digital control module (22) is also operable to sense the voltage of the circuit breaker to determine zero crossing points and phase angle, which phase angle can be utilized to determine the type of load and, therefore, can alter the profile to be utilized.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: February 23, 1999
    Inventor: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn

  • Patent US5875087

    Patent number: US5875087

    Abstract: A system including a load center monitor (10) connected to a plurality of digitally enhanced circuit breakers (40) by a communication bus (26) provides monitoring and control of an electrical power distribution system. A user port (20) and a service port (22) provide a communication interface with an external computer. Visual indicators (34) and an audible alarm (30) provide for alerting persons to certain conditions in the system. Buttons are provided for CLEAR (38) and RESET (36) functions, and a diagnostic port (24) is also provided. The load center monitor (10) is operable to monitor the operation of the breakers (40) and download information therefrom in the form of historical data. Also, the load center monitor (10) can upload operating information to a breaker (40) in order to change the operation thereof.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: November 9, 1999
    Inventor: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn

  • Patent US5982596

    Patent number: US5982596

    Abstract: A system including a load center monitor (10) connected to a plurality of digitally enhanced circuit breakers (40) by a communication bus (26) provides monitoring and control of an electrical power distribution system. A user port (20) and a service port (22) provide a communication interface with an external computer. Visual indicators (34) and an audible alarm (30) provide for alerting persons to certain conditions in the system. Buttons are provided for CLEAR (38) and RESET (36) functions, and a diagnostic port (24) is also provided. The load center monitor (10) is operable to monitor the operation of the breakers (40) and download information therefrom in the form of historical data. Also, the load center monitor (10) can upload operating information to a breaker (40) in order to change the operation thereof.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: November 9, 1999
    Inventor: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn

  • Patent US6005758

    Patent number: US6005758

    Abstract: A communication terminal (10) is coupled to and operable in a power line network with at least one of plurality of intelligent circuit breakers (40) wherein each such circuit breaker (40) has a communication port. The terminal (10) includes a housing and connection means (12, 14) for connecting the terminal (10) to the power line network. The terminal (10) includes a processing circuit (76) and communication ports (24, 22, 20) for communicating over communication links with the circuit breakers (40) or other external devices according to a message protocol defined for the system.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: December 21, 1999
    Inventor: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn

  • Patent US6157527

    Patent number: US6157527

    Abstract: A method of communicating data with a plurality of electronic circuit breakers operatively connected in a power distribution system is disclosed and claimed herein. Each circuit breaker includes a communication port coupled to a network. The method comprises coupling a communication terminal, having a processing circuit and a first communication port coupled to the processing circuit, to the network via the first communication port; operating a first communication protocol for automatically addressing individual ones of the circuit breakers and for controlling message traffic on the network; and transmitting and receiving data on the network under control of the first communication protocol relating to the monitoring and control of the individually addressable ones of the plurality of electronic circuit breakers coupled to the network.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: December 5, 2000
    Inventor: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn

  • Patent US6191589

    Patent number: US6191589

    Abstract: A novel toroidal core current sensor for an AFCI/GFCI Circuit Breaker and a test circuit configuration based thereon is disclosed. The current sensor has a plurality of load current conductors extending therethrough. One of the conductors carrying a load current has a portion of the load current shunted outside the core through a shunt conductor which is connected in parallel with one of the load current conductors. The secondary of the transformer outputs a current value proportional to and substantially less than the load current which may be, for example, detected by a control circuit which compares the current value against predetermined stored criteria and operates a circuit breaker accordingly. In the test circuit a power source and a waveform generator are provided for operating an AFCI\GFCI circuit breaker having the shunted current sensor and injecting test signals into a terminal of the circuit breaker.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: February 20, 2001
    Inventor: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn

  • Patent US6195243

    Patent number: US6195243

    Abstract: A system including a load center monitor (10) connected to a plurality of digitally enhanced circuit breakers (40) by a communication bus (26) forms a network of reconfigurable circuit breakers which provides advanced monitoring and control of an electrical power distribution system. A user port (20) and a service port (22) provide a communication interface with an external computer. Visual indicators (34) and an audible alarm (30) provide for alerting persons to certain conditions in the system. Buttons are provided for CLEAR (38), RESET (36), and TEST functions, and a diagnostic port (24) is also provided. The load center monitor (10) is operable to monitor the operation of the circuit breakers (40) and download information therefrom for storage in the load center monitor (10) as in the form of historical data.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: February 27, 2001
    Inventor: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn

  • Patent US6233128

    Patent number: US6233128

    Abstract: An apparatus and method is disclosed for retaining parameter information generated or received in an electronic circuit breaker (10). The electronic circuit breaker (10) includes a controller and is connected in a branch circuit coupled to a power source via a power line and powered by the power source. Upon occurence of a power fault, a control signal responsive to the power fault is generated and coupled to a control input of the circuit breaker. The control signal causes retention of parameter information generated or received in the electronic circuit breaker (10). Means for retaining the data representing parameter information include charging a storage capacitor to a predetermined value corresponding to the parameter information being retained, writing the parameter information being retained to an EEPROM and writing the data containing the parameter information being retained into a Static RAM.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: May 15, 2001
    Inventor: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn

  • Patent US6426634

    Patent number: US6426634

    Abstract: A circuit switching device or circuit breaker with integrated self-test enhancements is disclosed having separable contacts operable under processor control to control power to a circuit responsive to at least one of a plurality of fault conditions and operable according to a method for testing, including the steps of: controlling the switching device during a sampling cycle, to input one or more operating parameters sensed in the circuit to an A/D converter for measurement wherein the operating parameters enable detection of the fault conditions; determining whether to read a select one of the operating parameters from an output of the A/D converter into a first memory; and reading pre-determined parameter values from a second memory into the first memory during the sampling cycle instead of the operating parameters read from the A/D converter if a self-test has been invoked during the sampling cycle.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: July 30, 2002
    Inventor: LeRoy Blanton, Robert Henry Clunn

  • Patent US6426632

    Patent number: US6426632

    Abstract: There is disclosed and claimed herein apparatus and a method for testing an electronic circuit breaker having separable contacts and arc fault and/or ground fault interrupting capability responsive to differential currents in the line and neutral conductors, wherein the circuit breaker under test is connected in a test circuit, comprising the steps of: supplying operating power to the source terminals of the circuit breaker wherein the test circuit provides for connecting the neutral conductor source terminal to a ground in the test circuit; coupling testing signals from a test generator in the test circuit to the neutral conductor load terminal of the circuit breaker; and monitoring the condition of the separable contacts in the circuit breaker during the supply of testing signals to the neutral conductor load terminal.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: July 30, 2002
    Inventor: Robert Henry Clunn