摘要:
Es wird eine Vorrichtung, ein Magnetfeldsensor und ein Stromstärkemessgerät zur Messung der Stärke eines magnetischen Feldes vorgeschlagen, wobei zwei Sensormittel (11, 12) an zwei verschiedenen Orten vorgesehen sind, wobei am ersten Ort und am zweiten Ort das zu messende Feld betragsmäßig im wesentlichen gleich aber im wesentlichen antiparallel orientiert ist, und wobei das erste Sensormittel und das zweite Sensormittel (11, 12) monolithisch integriert vorgesehen sind.
摘要:
A high precision torque motor, including a partial rotation drive suitable for use in a galvanometer scanner, where the rotor (2) is supported within the stator (1) and housing assembly on all ceramic ball bearings (5, 6), including inner and outer races and bearing balls. The ceramic ball bearing assemblies and all structural support elements have substantially equal coefficients of expansion through the use of matched expansion, nickel-iron alloy for the rotor shaft, stator, housing and other structural components which contact, locate, and support the inner and outer bearing races. The non-conductive bearings permit exclusion of any grounding conductor strap as between the rotor shaft and the housing.
摘要:
An electronic energy meter and its package is described in which the meter package has a reduced number of parts, and the main circuit board assembly (30) has the metering electronics on board, thereby eliminating the need for flying leads and point-to-point wiring within the package. The energy meter includes a first enclosure portion (10), a circuit board assembly (30) for performing metering functions, a partial terminal block (12), and a second enclosure portion (20). The first and second enclosure portions (10, 20) are mateable with each other to form a meter package, in which the circuit board assembly (30) and partial terminal block (12) are at least partially contained within the meter package.
摘要:
An electronic utility meter includes a sensor module, a measurement module, and a removable expansion module. The sensor module connects to the electrical system of a facility, and includes voltage and current sensors. The voltage and current sensors are operable to receive voltage and current signals from the electrical system and generate measurements signals therefrom. The measurement module includes a measurement circuit operable to receive measurement signals and generate energy consumption data therefrom. The measurement module further includes a device for communicating information relating to the energy consumption data. The measurement module is configured to couple to the sensor module to connect the measurement circuit to the voltage and current sensors. The removable module is interposed between the sensor module and the measurement module. The removable module operably couples the measurement circuit to the voltage and current sensors.
摘要:
A tester includes a housing containing a passive test circuit including a plurality of LEDs respectively connected to terminals of a multi-terminal connector jack (39) on the housing for connecting the tester, by means of an associated cable harness, between a keyswitch module and other electronic circuits on an associated vehicle to be tested. Different harnesses may be provided, tailored to different vehicles. The test circuit is powered by a battery on board the vehicle and includes indicators dedicated to checking to see if the battery charging circuit on the vehicle is operating properly. The remaining indicators check different circuits, depending upon the override switches associated with certain ones of the indicators and a test switch for simultaneously energizing all of the indicators. A relay (52) shorts two of the jack terminals until the tester is powered, the cable harness including a diode across those terminals which is normally shorted out and is placed in circuit when the relay is energized.
摘要:
An electronic meter (10) which automatically detects the service type and voltage to which the meter (10) is installed and which either automatically continues its own programming to the detected service is disclosed. An electronic energy meter (10) that permits the addition of new measurements or testing capabilities without requiring factory modifications to effect such functionality changes is also disclosed. The meter (10) includes firmware which measures the characteristics of electrical energy supplied to the meter and which generates characteristic signals reflective of the measured characteirstics of the electrical energy. A processor (16) is connected to receive and process the characteristic signals. The processing of the characteristic signals includes selecting and manipulating certain of the characteristic signals and generating characteristic information in response to the selection and generating additional characteristic information in response to the manipulation. It is preferred for the meter (10) to include a memory (35) having reference information stored therein. In such an embodiment, the manipulation of characteristic signals includes retrieving certain of the reference information and generating the characteristic information in response to the selected signals and the reference information.
摘要:
A tester includes a housing containing a passive test circuit including a plurality of LEDs respectively connected to terminals of a multi-terminal connector jack (39) on the housing for connecting the tester, by means of an associated cable harness, between a keyswitch module and other electronic circuits on an associated vehicle to be tested. Different harnesses may be provided, tailored to different vehicles. The test circuit is powered by a battery on board the vehicle and includes indicators dedicated to checking to see if the battery charging circuit on the vehicle is operating properly. The remaining indicators check different circuits, depending upon the override switches associated with certain ones of the indicators and a test switch for simultaneously energizing all of the indicators. A relay (52) shorts two of the jack terminals until the tester is powered, the cable harness including a diode across those terminals which is normally shorted out and is placed in circuit when the relay is energized.
摘要:
Integrated voltage level indicator comprising a plurality of polymer LEDs between two contact leads, in which the number of luminescing LEDs and/or the intensity of the light in each LED is determined by the external voltage level.
摘要:
The present invention relates to a method and a device for detecting partial discharges in cables and accessories, comprising the following steps of: interrupting the metal earth shield of the cable; connecting both sides of the interrupted sheath to a measuring instrument; arranging a connection between both sides of the interrupted sheath which is at least suitable for transferring the signals with the mains frequency; and displaying the signal, wherein only signal components with frequencies greater than 0.5 MHz are displayed. As a result of these steps, the interference associated with the first mentioned frequency range is avoided. It is noted here that the signal/noise ratio of the frequency range applied according to the invention is more favourable. In order to properly be able to examine the quality of a partial discharge, it is important to relate it to the voltage of the cable in which the partial discharge takes place. The present invention provides a method wherein prior to display the signal is combined with a signal representing the mains voltage. It is especially attractive when the signal representing the mains voltage is generated in contact-free manner, for example in capacitive manner.
摘要:
Die Erfindung betrifft einen Anschluß für elektrische Geräte z.B. in Form eines Steckers oder in Form einer Prüfspitze zu Meßzwecken mit einem Gehäuse, mindestens einem Kontaktstift sowie Leiter zur Stromführung, wobei das Gehäuse (1) ein standardisiertes Grundteil (2) aufweist, welches mit für den jeweiligen Einsatz speziell ausgebildeten unterschiedlichen Adapterteilen (z.B. 3) unter Herstellung eines elektrischen Kontakts verbindbar ist.