Abstract: A high voltage digital voltmeter and wireless phaser includes first and second voltmeters/phasers. Each voltmeter/phaser has a probe for accessing a point in a circuit, circuitry connected to the probe and including a microprocessor, and a ground reference associated with the circuitry. Each microprocessor is programmed to measure line-to-ground voltage of the respective voltmeter/phaser. This information is shared between the microprocessors and is used to determine voltage measurements and phase angle difference.

Abstract: A mechanism for providing monitoring of electric field detectors. In accordance with instructions on a machine-readable medium, a computing system receives from a device data corresponding to a user identifier. Further, the computing device identifies from a plurality of electric field detectors one or more electric field detectors associated with the user identifier and identifies status data for each of the identified one or more electric field detectors. The status data for each electric field detector in the plurality of electric field detectors comprises data indicative of at least (i) a location of the electric field detector and (ii) an alarm state of the electric field detector. Additionally, the computing system causes a display component of the device to display a graphical user interface that presents indicia of the status data for each of the identified one or more electric field detectors.

Abstract: A mechanism for providing monitoring of electric field detectors. In accordance with instructions on a machine-readable medium, a computing system receives from a device data corresponding to a user identifier. Further, the computing device identifies from a plurality of electric field detectors one or more electric field detectors associated with the user identifier and identifies status data for each of the identified one or more electric field detectors. The status data for each electric field detector in the plurality of electric field detectors comprises data indicative of at least (i) a location of the electric field detector and (ii) an alarm state of the electric field detector. Additionally, the computing system causes a display component of the device to display a graphical user interface that presents indicia of the status data for each of the identified one or more electric field detectors.

Abstract: A case for enclosing an electric device, such as a personal voltage detector is provided. Embodiments of the case can increase safety and convenience to wearers operating near high-voltage electric lines, and combine (i) the ability to wear the case in either an open or closed position around a user's neck, (ii) the ability to adjust the position of the case, when either open or closed, to an appropriate mid-chest or mid-torso position, (iii) the ability to use the device when the case is open and worn around a user's neck and the device is inside the case, and (iv) an electrically shielded enclosure. When closed, the case can disable the electric device, allowing the device to be always on.

Abstract: An ammeter is provided with a plurality of individual wound coils interconnected in a generally U-shaped array to measure the magnitude of current in a conductor extending through a sensing region inside the U-shape. Additional pairs of position-sensing coils determine the position of the conductor relative to the sensing region and provide outputs to circuitry which permits the magnitude measurement to be displayed only if the conductor extends through the sensing region.

Abstract: A voltmeter/phaser includes dual hot-stick probes, each carrying a housing including a digital display, one of the housings also having a measurement circuit for measuring the sensed voltage. A plural-conductor cable interconnects the housings and carries, in two separate conductors, current between the probes and display data between the display circuits, so that identical voltage values are always displayed on the two displays.

Abstract: A digital voltage indicator includes a probe having a first electrode including a hollow portion and a probe tip projecting from the hollow portion, a second electrode extending into the hollow portion and spaced therefrom, and dielectric material disposed between the second electrode and the hollow portion. The indicator may include a reference conductor connected to the second electrode and detection circuitry connected between the probe and the reference conductor for detecting a voltage difference therebetween, and an annunciator connected to the detection circuitry for displaying the measured voltage.

Abstract: A wearable electric field detector has a housing mountable on a user's person and including a sensing circuit responsive to an electric field to generate a signal which varies in proportion to the strength of the sensed field, and an alarm circuit coupled to the sensing circuit for producing an intermittent audible alarm signal, which has a repetition rate varying in proportion to the strength of the field, and a visible alarm signal. A mute circuit is manually activatable for selectively muting the audible alarm and then automatically reenabling it after a predetermined time period. The detector includes a manually-actuatable test circuit. There is no on-off switch, the detector being disabled by being disposed in a shielded carrying case.

Abstract: A device for testing a conductor for the presence of high AC voltage includes a voltage detection circuit connected to a probe assembly, preferably designed for insertion in the access bushing of an underground electrical transmission or distribution equipment. The probe assembly includes an elongated tubular insulating housing with a conductive probe at one end and a threaded connector at the other end for connection to the detection circuit. A high resistance, preferably several megohms, is connected in series between the tip and the connector and is preferably comprised of a plurality of series-connected resistors encased in a heat shrink tubing.

Abstract: A tester for power transformers and capacitors includes a pulse generator for applying a pulsating test signal to a pair of test leads which may be connected across the terminals of the device to be tested. Also connected across the test leads are a capacitor detector, an inductor detector and a continuity detector. If the connections to the transformer or capacitor in the device to be tested are good, the capacitor detector and inductor detector will distinguish one from the other and indicate that its condition is good. If the connections to the device are not good, the continuity detector will indicate whether there is a short circuit or open circuit condition. The detectors are coupled through control logic circuitry to an indicator circuit including a horn and blinking lights for providing unique indications of capacitor okay, inductor okay, short and open conditions. The capacitor detector provides a discharge path for a capacitor and detects the discharge current flow.

Abstract: A lightning arrester tester includes two tubular poles respectively carrying probe terminals, one probe terminal being connected in series through a high-voltage rectifier and high-resistance circuit disposed within the pole to one terminal of a DC microammeter mounted on the outside of the one pole, the other probe terminal being connected through a high-resistance circuit housed within the second pole to the other meter terminal. A diode is connected in parallel with the meter to protect the meter from high leakage currents. In use, the probe terminals are respectively connected to a high-voltage power transmission or distribution line and one terminal of an arrester, the other terminal of which is grounded or, alternatively, to ground and to one terminal of an arrester, the other terminal of which is connected to a high-voltage power transmission or distribution line. The meter displays DC leakage current through the arrester.

Abstract: A tester applies a high-voltage test signal across the probes of a high-voltage measuring apparatus, wherein at least one of the probes is mounted at a probe end of an elongated insulated pole. The tester includes a battery-powered generator for generating the test signal which is applied across two contact terminals, respectively adapted for connection to the probes. One of the contact terminals is disposed at the bottom of an elongated tubular socket which receives the probe end of the pole, the contact terminal including two conductive members spring-biased apart until the pole is inserted in the socket. The generator is energized through a switch which may be mounted on the generator housing. In one embodiment the other contact terminal is an alligator clip and in a second embodiment the other contact terminal is disposed in a second socket.

Abstract: The ammeter includes a tubular housing with a hook-shaped sensor secured thereto at one end thereof and coupled to battery-powered digital ammeter circuitry disposed within the housing. The other end of the housing is open and receives telescopically therein a cylindrical cartridge which includes either a cradle or a recess supporting a replaceable battery and carrying connectors for connecting the battery to the ammeter circuitry. A universal spline coupler is telescopically received in a bore in the cartridge and projects from the tubular housing when the cartridge is disposed therein for coupling to associated equipment, such as a hot stick.

Abstract: A cable connector jacket formed of flexible, electrically insulating plastic is of unitary, one-piece construction, including two cavity-defining bodies hingedly interconnected in a clamshell-type configuration for movement between open and closed conditions. Each body has two pairs of channel-like tapered arms respectively extending in opposite directions therefrom generally parallel to the hinge line. When the bodies are in their closed conditions, the cavities define a chamber for accommodating the cable connector, and the arms of one body respectively mate with those of the other body to form four tapered tubes for respectively accommodating cable portions interconnected by the connector. A latch on the body holds the jacket closed.