Patent application number | Description | Published |
20080304196 | Electrical Circuit With Incendive Arc Prevention Means - An electrical circuit comprising a power supply, a load and an incendive arc prevention means comprising a monitoring means and an isolation means, in which the monitoring means monitors the electrical circuit by means of a reactor means, in which if a short circuit with the potential to cause an incendive arc occurs in the electrical circuit the reaction of the reactor means is detected by the monitoring means and the isolation means fully or partially isolates the power supply from said short circuit, such that an incendive arc cannot occur, in which if an event with a current and/or voltage pattern which is characteristic of a propagating non-incendive arc occurs in the electrical circuit between the power supply and the load, the reaction of the reactor means is detected by the monitoring means, and the isolation means fully or partially isolates the power supply from said event, such that an incendive arc cannot occur. | 12-11-2008 |
20090092398 | Data Signal Isolation Apparatus - Data signal isolation apparatus comprising a first media converter adapted to convert outgoing electrical data signals into outgoing optical data signals, an optical data signal transmission means adapted to transmit said outgoing optical data signals, a second media converter adapted to convert said outgoing optical data signals back into outgoing electrical data signals, and an intrinsically safe power supply, in which the optical data signal transmission means comprises an electrical isolation gap, and in which the second media converter is powered by the intrinsically safe power supply. | 04-09-2009 |
20090180226 | Electrical Circuit with Incendive Arc Prevention - An electrical circuit comprising a power supply, a load, a first pair of parallel positive cables between the power supply and the load, a first pair of parallel negative cables between the load and the power supply, and incendive arc prevention means, in which the incendive arc prevention means comprises monitoring means adapted to monitor the first pair of positive cables and the first pair of negative cables, and to detect if the current and/or voltage in one of the first pair of positive cables deviates from the other, and if the current and/or voltage in one of the first pair of negative cables deviates from the other, and in which the incendive arc prevention means comprises a control means adapted to fully or partially isolate the power supply from the first pair of positive cables and the first pair of negative cables if the monitoring means detects that the current and/or voltage of one of the first pair of positive cables has deviated from the other, or if the current and/or voltage of one of the first pair of negative cables has deviated from the other. | 07-16-2009 |
20090215324 | Modular fieldbus segment protector - A modular Fieldbus segment protector comprising a support means provided with trunk connection means, a trunk connection bus and a plurality of spur outlets, in which autonomous fault isolation means are removably mounted on the support means between the trunk connection bus and any one or more of the plurality of spur outlets. | 08-27-2009 |
20090315395 | Fieldbus system with shared redundancy system - A Fieldbus system comprising a plurality of segments each comprising a trunk with its own primary power supply, and a shared redundancy system comprising one or more auxiliary power supplies and monitoring and control means, in which the monitoring and control means is adapted to detect failures in any part of any of the plurality of segments, in which in the event of a failure being detected by the monitoring and control means in any one of the plurality of segments, the monitoring and control means isolates the trunk in that segment from its primary power supply and connects said trunk to one of the one or more auxiliary power supplies, and in which any one of the auxiliary power supplies is connectable to any two or more of the trunks. | 12-24-2009 |
20100195255 | Intrinsically Safe Communications Circuit - An electrical circuit comprising a power supply, a load, a pair of parallel positive cables between the power supply and the load, a pair of parallel negative cables between the load and the power supply, and incendive arc prevention means, comprising: monitoring means adapted to detect if the current and/or voltage in one of the pair of cables deviates from the other, and a control means adapted to fully or partially isolate the power supply from the pair of cables if the monitoring means detects that their current and/or voltage has deviated from the other, characterised in which: the electrical circuit comprises a common positive section between the power supply and the pair of positive cables, and a common negative section between the pair of negative cables and the power supply, in which a first modulation means is adapted to generate a modulated communications signal. | 08-05-2010 |
20100303138 | Intrinsically Safe DSL Circuit - An electrical installation comprising control and/or monitoring means connected to a field device by means of an electrical communications circuit, in which the communications circuit comprises a power supply, a communications device, the field device as a load thereof, and Intrinsic Safety means, in which the communications device is adapted to send and receive signals over the communications circuit to and from the field device, in which the field device is adapted to send and receive signals over the communications circuit to and from the communications device, in which the Intrinsic Safety means renders all or part of the communications circuit Intrinsically Safe, in which the field device is located in an Intrinsically Safe part of the communications circuit, characterised in which the communications circuit is adapted to carry DSL signals, and in which the communications device and the field device communicate with one another according to the DSL protocol. | 12-02-2010 |
20110190955 | Electrical Communications Circuit With Spur Diagnostics - An electrical communications circuit comprising a power supply, a trunk section, a spur section, isolation means disposed between the trunk section and the spur section, diagnostics apparatus connected to the trunk section and a field device connected to the spur section, in which the field device is adapted to send data signals over the communications circuit, which data signals comprise one or more core functions, in which the communications circuit and/or the data signals function under one or more pre-determined normal operating parameters, in which the diagnostics apparatus is adapted to detect one or more pre-determined breaches of said normal operating parameters, in which a spur diagnostics module is connected to the spur section and is adapted to monitor electrical characteristics of the spur section, in which the spur diagnostics module comprises interference means adapted to interfere with the communications circuit and/or the data signals sent thereon such that said one or more pre-determined breaches of the normal operating parameters are detectable by the diagnostics apparatus, but such that said one or more core functions of the data signals are not effected, and in which the spur diagnostics module is adapted to activate said interference means when it detects one or more pre-determined electrical events in the spur section. | 08-04-2011 |
20110264396 | ELECTRICAL CIRCUIT WITH PHYSICAL LAYER DIAGNOSTICS SYSTEM - An electrical circuit has a power supply, one or more devices and a diagnostics system. The diagnostics system includes a monitoring means adapted to monitor physical layer characteristics of the electrical circuit, a database containing circuit design data for the electrical circuit, and comparator means adapted to diagnose the status of the monitored physical layer characteristics of the electrical circuit by comparing them with the circuit design data. | 10-27-2011 |
20110279939 | ELECTRICAL CIRCUIT WITH REDUNDANT TRUNK - An electrical circuit comprising a power supply, a load, first and second trunks disposed therebetween and control means adapted to control the electrical status of the first and second trunks, in which the control means comprises monitoring means adapted to monitor the current and/or voltage of the first and second trunks and to detect current and/or voltage events which are indicative of faults occurring thereon, and isolation means adapted to isolate the first or second trunk when the monitoring means detects a current and/or voltage event which is indicative of a fault occurring thereon, in which the first and second trunks are electrically connected and arranged in parallel such that the power supplied to the load is distributed substantially equally between them, and in which the control means comprises compensation means adapted to prevent the isolation means from isolating one of said first or second trunks when a current and/or voltage event which is indicative of a fault occurs thereon which is caused by a fault occurring on the other of the first or second trunks. | 11-17-2011 |
20120118047 | IEC 61158-2 ELECTRICAL CIRCUIT WITH WATER DETECTION MEANS COMPRISING A PHYSICAL LAYER ATTRIBUTE MODIFIER - An electrical circuit confirming to the IEC 61158-2 standard comprising a power supply, a device as a load thereof, and monitoring means adapted to monitor one or more physical layer attributes of the electrical circuit, in which the device comprises an enclosure, device function electronics disposed therein and two terminals connecting said device function electronics to said electrical circuit, in which water detection means is disposed inside said enclosure, and comprises water detection probes and a physical layer attribute modifier mounted across said electrical circuit in parallel with said device function electronics, and in which when said water detection probes detect water said physical layer attribute modifier makes a modification to a physical layer attribute of the electrical circuit, which modification is detectable by said monitoring means. | 05-17-2012 |
20120224291 | ELECTRICAL CIRCUIT WITH SURGE PROTECTION MONITORING - An electrical circuit comprising a power supply, a load and a surge protection device adapted to protect said load and/or power supply from electrical fast transient events according to the requirements of IEC 61000-4-2 or 4 and which comprises a stress threshold, in which the electrical circuit further comprises a monitoring device adapted to monitor the current in said surge protection device and detect the breaching of said threshold by electrical fast transient events. | 09-06-2012 |
20120299601 | METHOD OF TESTING A SPUR SHORT CIRCUIT PROTECTION SYSTEM AND DIAGNOSTIC DEVICE FOR PERFORMING THE METHOD - A method of testing a short circuit protection system applied to a spur of an electric circuit, in which the short circuit protection system comprises a current limiting means which applies a current limit to said spur if the current thereon exceeds a spur current trip level, in which the electric circuit comprises a power supply and an isolation means adapted to fully or partially isolate the power supply from the electric circuit if the current thereon exceeds a power supply trip level for longer than a dead-band period, in which said method comprises the following steps: i) applying a test current demand to said short circuit protection system which has a current and duration sufficient for said spur current trip level to be exceeded, but a current insufficient for said power supply trip level to be exceeded and/or a duration insufficient to exceed said deadband period, ii) detecting if the current limiting means applies said current limit or not during said test current demand. | 11-29-2012 |
20130063847 | FAULT PROTECTION CIRCUIT FOR IEC 61158 FIELDBUS SPUR AND METHOD OF USING THE SAME - A fault protection circuit for use on a spur of an IEC 61158 Fieldbus network comprising a fast acting current limiter adapted to limit the spur current to the level of a reference current when the spur current reaches said reference current, control means adapted to monitor the spur AC and/or DC current and/or voltage, and isolation means adapted to apply a shunt short circuit isolation to said spur upon receipt of an activation signal from the control means, in which the control means is adapted to control the level of the reference current, and in which when said control means detects one or more pre-determined fault conditions on said spur it activates the isolation means and lowers the level of reference current. | 03-14-2013 |
20130082678 | ELECTRONIC POWER CONDITIONER CIRCUIT - An electronic power conditioner circuit for use in an I EC 61 158 Fieldbus network comprising a series element, a capacitor and a resistor formed as a gyrator circuit, and a biasing circuit, in which said biasing circuit supplies a control voltage and/or current to a control terminal of the series element, and in which said biasing circuit is adapted to set said control voltage and/or current such that a voltage drop across the series element is maintained at a pre-determined level. | 04-04-2013 |