A resistance measuring device includes an amplifying unit including an amplifier, a first and a second current supply unit, a voltage detection unit, and a controller. The controller controls the voltage detection unit to detect a first output voltage of an output terminal of the amplifier in a state where the current of the first current source flows in a forward direction to a measurement target resistor by controlling the first current supply unit, controls the voltage detection unit to detect a second output voltage of the output terminal of the amplifier in a state where the current of the second current source flows in a reverse direction to the measurement target resistor by controlling the second current supply unit, and calculates a resistance value of the measurement target resistor based on the detected first output voltage and the detected second output voltage.

A measurement device providing a graphical user interface (GUI) to a user on a remote terminal comprising at least one first processor; and at least one first memory including one or more first sequences of instructions to perform the steps of transmitting a GUI displaying a at least one of a first, a second, a third, and a fourth image in response to at least one of a voltage characteristic, a current characteristic, and a load characteristic obtained from the user through the GUI on the remote terminal. Then, the measurement device stores in a memory the at least one of the voltage characteristic, the current characteristic, and the load characteristic.

A measurement device, such as a power meter or power submeter, may comprise a frame disposed in a housing dividing an interior volume of the housing into a first volume and a second volume. An external power source is connected to the device in the first volume and the frame may serve as an insulative barrier between the first volume and an exterior it and the housing. The device may alternatively, or additional include, an user interface assembly that is configured to mounted in a same orientation regardless of an orientation of the device or housing of a device relative to the external power source.

A measurement device, such as a power meter or power submeter, may comprise a frame disposed in a housing dividing an interior volume of the housing into a first volume and a second volume. An external power source is connected to the device in the first volume and the frame may serve as an insulative barrier between the first volume and an exterior it and the housing. The device may alternatively, or additional include, an user interface assembly that is configured to mounted in a same orientation regardless of an orientation of the device or housing of a device relative to the external power source.

Enclosures for electrical distribution systems include a height adjuster enclosure that provides connector buses and bus lines that rise from bus lines in a main terminal enclosure to connect to another enclosure such as a meter stack enclosure through the bus lines in the height adjuster enclosure. The bus lines in the height adjuster enclosure can include a three-phase bus having three vertical line conductor buses and a vertical neutral conductor bus that can be coupled to a feeder bus in the main terminal enclosure and a feeder bus in the meter stack enclosure.

Enclosures for electrical distribution systems include a height adjuster enclosure that provides connector buses and bus lines that rise from bus lines in a main terminal enclosure to connect to another enclosure such as a meter stack enclosure through the bus lines in the height adjuster enclosure. The bus lines in the height adjuster enclosure can include a three-phase bus having three vertical line conductor buses and a vertical neutral conductor bus that can be coupled to a feeder bus in the main terminal enclosure and a feeder bus in the meter stack enclosure.

A voltmeter probe has a metal probe tip projecting from an elongated insulating handle. The handle has a longitudinal axis and a radially projecting finger guard with an inner diameter and an outer diameter. A barrier covers the terminal. The barrier has an aperture configured to provide access for the probe tip to be inserted through the barrier into contact with the terminal, including access for the finger guard to be inserted through the barrier. The aperture has dimensions of length and width, including no width that is not less than the outer diameter of the finger guard.

A voltmeter probe has a metal probe tip projecting from an elongated insulating handle. The handle has a longitudinal axis and a radially projecting finger guard with an inner diameter and an outer diameter. A barrier covers the terminal. The barrier has an aperture configured to provide access for the probe tip to be inserted through the barrier into contact with the terminal, including access for the finger guard to be inserted through the barrier. The aperture has dimensions of length and width, including no width that is not less than the outer diameter of the finger guard.

Circuit board comprising a printed circuit comprising phase conductors, each of which is arranged so as to be connected to one phase of a multiphase line, the circuit board further comprising a rectifier bridge comprising phase diodes that are mounted on one and the same face of the printed circuit, the phase diodes comprising, for each phase conductor, one pair of phase diodes comprising a first phase diode having an anode that is connected to said phase conductor and a second phase diode having a cathode that is connected to said phase conductor, the pairs of phase diodes lying in succession along a positioning axis on the face of the printed circuit, the first phase diode and the second phase diode of each pair of phase diodes being positioned in parallel but inverted with respect to each other.

A remote radio frequency (RF) power sensing unit including a first module and a second module. The first module may be configured to generate a digital output representative of a power level of a radio frequency (RF) signal. The second module may be configured to convert the digital output of the first module to a digital signal communicating the power level and transmit the digital signal communicating the power level over a wireless communication channel using a wireless protocol.