Abstract: A three-phase toroidal current transducer comprises a cuboid detector body (12), having three cylindrical passages (14) each for receiving a single-phase cable of a three-phase load (not shown). Each of the three passages (14) has an embedded toroidal winding (not shown) which is used to detect a current in the load cable (also not shown). Signals representing the current in each of the three individual load cables are sent to a meter (not shown), which may be located remotely. The signals are transmitted along a multi-core signal cable (16), which has a standard connector (18) for a plug-in connection to the meter. One of the wires in the multi-core signal cable (16) is connected to a component in the transducer (10) that identifies the rating of the transducer, so that the meter can determine this automatically when the signal cable is plugged in.

Abstract: A method of welding a pipe section in a ring-based welding system, wherein the welding system comprises: (i) an adjustable ring gear mount; (ii) a ring gear assembly positioned on the adjustable ring gear mount, the ring gear assembly having an inner diameter and a center point; and (iii) at least one weld head assembly mounted on the ring gear assembly.

Abstract: A modular metering unit, shown generally at 10, comprises a master module 12, slave modules 14a to 14f, and a communications module 16. Together the modules 12, 14 and 16 make up a modular metering unit for metering electricity from plural loads (not shown) such as, in the case of a large food retail premises, chill or freeze display cabinets. Each of the slave modules includes electricity meters for measuring electricity supplied to a load. The loads may be located remotely from the metering unit and each one has a current detector that feeds a low-voltage signal back to the meter via a cable (not shown). The slave modules are connected to one another and to the master module by an internal bus through which data and power are carried between the modules.

Abstract: The present invention provides a method and system for storage of data files, comprising notifying at least one local reference storage about storing and/or deleting a data file on a central data repository, depositing a reference element on the at least one local reference storage after notifying, requesting a deposited reference element from the local reference storage for demanding a data file contained in the central data repository, retrieving the demanded data file on submitting the reference element to the central data repository.

Abstract: A welding system having a traveling base carriage, a carriage positioning mechanism engaging the base carriage; and a ring gear assembly mounted on the base carriage. The ring gear assembly will include: (i) two half ring sections, each having at least one gear track; (ii) a ring gear mount attaching each of the half ring sections to the base carriage, where the ring gear mounts allow the half ring sections to separate and guide the half ring sections into mating engagement. The system further includes at least one weld head assembly mounted on the ring gear assembly. The weld head assembly includes: i) a welding torch; ii) a torch positioner, and iii) a position sensor.

Abstract: A three-phase toroidal current transducer comprises a cuboid detector body 12, having three cylindrical passages 14 each for receiving a single-phase cable of a three-phase load (not shown). Each of the three passages 14 has an embedded toroidal winding (not shown) which is used to detect a current in the load cable (also not shown). Signals representing the current in each of the three individual load cables are sent to a meter (not shown), which may be located remotely. The signals are transmitted along a multi-core signal cable 16, which has a standard connector 18 for a plug-in connection to the meter. One of the wires in the multi-core signal cable 16 is connected to a component in the transducer 10 that identifies the rating of the transducer, so that the meter can determine this automatically when the signal cable is plugged in.

Abstract: In a voltage measurement apparatus high—i.e. un-attenuated—voltages are connected to an attenuator 12, which then feeds attenuated voltage waveforms to a microprocessor-based analogue-digital converter/voltage measurement circuit 14. A representative digital voltage signal 16 and a synchronising signal 18 are then sent across an optical isolation barrier 20, and are then output to metering circuits 22. The metering circuits 22 receive analogue current inputs 24 which are sampled in synchronism with the digital voltage signals for an accurate measurement of power. Safe outputs 26 are provided which are isolated from any dangerous voltage.

Abstract: A method of welding a pipe section in a ring-based welding system, wherein the welding system comprises: (i) an adjustable ring gear mount; (ii) a ring gear assembly positioned on the adjustable ring gear mount, the ring gear assembly having an inner diameter and a center point; and (iii) at least one weld head assembly mounted on the ring gear assembly.

Abstract: A modular metering unit, shown generally at 10, comprises a master module 12, slave modules 14a to 14f, and a communications module 16. Together the modules 12, 14 and 16 make up a modular metering unit for metering electricity from plural Loads (not shown) such as, in the case of a large food retail premises, chill or freeze display cabinets. Each of the slave modules includes electricity meters for measuring electricity supplied to a load. The loads may be located remotely from the metering unit and each one has a current detector that feeds a low-voltage signal back to the meter via a cable (not shown). The slave modules are connected to one another and to the master module by an internal bus through which data and power are carried between the modules.

Abstract: The present invention provides a method and system for storage of data files, comprising notifying at least one local reference storage about storing and/or deleting a data file on a central data repository, depositing a reference element on the at least one local reference storage after notifying, requesting a deposited reference element from the local reference storage for demanding a data file contained in the central data repository, retrieving the demanded data file on submitting the reference element to the central data repository.

Abstract: A welding system having a traveling base carriage, a carriage positioning mechanism engaging the base carriage; and a ring gear assembly mounted on the base carriage. The ring gear assembly will include: (i) two half ring sections, each having at least one gear track; (ii) a ring gear mount attaching each of the half ring sections to the base carriage, where the ring gear mounts allow the half ring sections to separate and guide the half ring sections into mating engagement. The system further includes at least one weld head assembly mounted on the ring gear assembly. The weld head assembly includes: i) a welding torch; ii) a torch positioner, and iii) a position sensor.