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| Number | Title | Issue Date |
| 8094425 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 01/10/2012 |
| 8085055 | Branch current monitoring system A power monitoring system that reduces the need for transient voltage suppressors while using current transformers on an associated support operating using a current mode. ... | 12/27/2011 |
| 8081411 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 12/20/2011 |
| 8024986 | Environmental sensing unit A duct mounted environmental sensing unit includes a plurality of sensors for detecting respective parameters of a fluid in a duct. The sensing unit enables at least three sensors to make contact with the fluid through a single insertion point in the duct. ... | 09/27/2011 |
| 8024982 | Duct-mountable sensing unit A duct-mountable sensing unit includes a plurality of sensors for detecting respective parameters, including pressure, of a fluid in a duct. The sensing unit enables fluid communication between the sensors and the fluid in the duct through a single insertion point i... | 09/27/2011 |
| 7968806 | Multi-voltage housing A housing for one or more electrical components that are connected to sources of a plurality of voltages comprises a box, a first cover to cover a first portion of the opening in the box and a second cover to cover a second portion of the opening. The first cover in... | 06/28/2011 |
| 7902992 | Status indicator The sensitivity and accuracy of a status indicator for sensing a current in an electrical circuit is improved by shifting the reference level of the transformer output to maximize the input signal to a precision voltage detector and by reducing the hysteresis of the... | 03/08/2011 |
| 7889473 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 02/15/2011 |
| 7855655 | Current switch with automatic calibration A current switch is automatically calibrated when a flow of electric current is initiated in a power cable. ... | 12/21/2010 |
| 7808758 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 10/05/2010 |
| 7688562 | Status relay including a current switch Low current electrical devices can be protected by a status relay having an active current sensing circuit that includes a current switch. ... | 03/30/2010 |
| 7548404 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 06/16/2009 |
| 7525806 | Combination current sensor and relay A combination current sensor and relay has an improved housing. In one aspect, the housing includes light emitting diodes on an upper surface that indicate open circuit and short circuit conditions. In another aspect, the housing includes a securement structure for ... | 04/28/2009 |
| 7493222 | High density metering system A modular metering system comprises a data processing module, a current module and a voltage module. The current and voltage modules include sensor memories characterizing the respective current and voltage sensors facilitating assembly and repair of the metering sy... | 02/17/2009 |
| 7474088 | Power monitoring system A power monitoring system with multiple sensors for electrical panels providing power through multiple electrical conductors. The power monitoring system preferably includes at least four sensors supported in a fixed spatial relationship on a support. The sensors in... | 01/06/2009 |
| 7447603 | Power meter The computational resources of a digital power meter can be reduced by utilizing an interrupt requested in anticipation of interrupt latency to perform real-time tasks, an approximation of a root mean square load current at an earlier time to compensate for a phase ... | 11/04/2008 |
| 7372687 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 05/13/2008 |
| 7362556 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 04/22/2008 |
| 7359809 | Electricity metering with a current transformer The data storage and processing resources required for an electric meter are reduced by basing the selection and application of phase error correction on a root mean square load current flowing through the meter. ... | 04/15/2008 |
| 7352287 | Pneumatic controller A pneumatic controller for controlling a device. ... | 04/01/2008 |
| 7333345 | Combination current sensor and relay A combination current sensor and relay has an improved housing. In one aspect, the housing includes light emitting diodes on an upper surface that indicate open circuit and short circuit conditions. In another aspect, the housing includes a securement structure for ... | 02/19/2008 |
| 7330022 | Power monitoring system A power monitoring system for electrical panels providing power, received from one or more power sources, to multiple current conductors. The power monitoring system preferably includes a plurality of sensors affixed to a support. A portion of each sensor defines an... | 02/12/2008 |
| 7312686 | Split core sensing transformer Separable toroidal segments reduce the size of a sensing transformer that can be installed on an electrical conductor while connected to a device. ... | 12/25/2007 |
| 7310049 | Status indicator A status indicator indicates an operating state, including an electrical malfunction, of an electrical load that is located and controlled from locations remote from a monitoring location. ... | 12/18/2007 |
| 7239810 | System for controlling an electrical device A system for controlling an electrical device that includes an enclosure and an optical signal. ... | 07/03/2007 |
| 7230414 | Current sensor that includes a pair of segments A current sensor that includes a pair of segments. Each of the segments includes magnetically permeable cores that can be joined together. A winding is used to substantially encircle one of the cores. ... | 06/12/2007 |
| 7221145 | Simplified power monitoring system for electrical panels A power monitoring system for electrical panels providing multi-phase power, with multiple current sensors. The disclosed power monitoring system preferably determines the instantaneous power provided to each of multiple loads by sensing the potential and phase of e... | 05/22/2007 |
| 7212930 | Method and apparatus for phase determination An electricity metering method and apparatus is provided for determining the phase of first waveform relative to a harmonically distorted, second waveform having cycles temporally distinguished by an occurrence of an amplitude that is neither zero amplitude nor a ma... | 05/01/2007 |
| 7203047 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 04/10/2007 |
| 7193829 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 03/20/2007 |
| 7193428 | Low threshold current switch Low threshold current switch comprising a sensing transformer, a voltage multiplier and a switch enables monitoring a very low electric current in a power cable. ... | 03/20/2007 |
| 7161345 | Power monitoring system that determines phase using a superimposed signal A power monitoring system comprising a first current sensor suitable to sense first changing electrical current within a first conductor to a first load and a first conductor. A second conductor sensing a first voltage potential provided to the first load. A power m... | 01/09/2007 |
| 7157899 | Prioritized interrupt for waveform measurement An interrupt request is asserted in anticipation of a period of latency preceding preparedness of a power meter data processing device to sample a voltage or current enabling the use an interrupt to control the data processing device's performance of real-time sampl... | 01/02/2007 |
| 6950292 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 09/27/2005 |
| 6937003 | Power monitoring system A power monitoring system for electrical panels providing multi-phase power, with multiple current sensors. The disclosed power monitoring system preferably includes a support, at least four sensors defining an opening through which a wire may be extended, with the ... | 08/30/2005 |
| 6856515 | Combination current sensor and relay A combination current sensor and relay has an improved housing. In one aspect, the housing includes light emitting diodes on an upper surface that indicate open circuit and short circuit conditions. In another aspect, the housing includes a securement structure for ... | 02/15/2005 |
| 6825771 | Identification system A system for identifying the relative location of devices. ... | 11/30/2004 |
| 6809509 | Electrical monitoring system An electrical sensing device that includes a support and sensors supported by the support in a fixed spatial relationship. ... | 10/26/2004 |
| 6737854 | Electrical current monitoring system with improved current sensor configuration A system for monitoring respective electrical currents in a plurality of conductors, such as wires. The system may include first and second current sensors, each suitable for sensing the current in a respective conductor. The first sensor may provide a first signal ... | 05/18/2004 |
| 6724600 | Combination current sensor and relay A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cabl... | 04/20/2004 |
