A symptom of malfunction regarding operating characteristics of a switch should be detected exactly. A switch operating characteristic monitoring device is comprised of a current sensor that measures a close command current of a switch, an auxiliary switch that outputs signals from at least two or more auxiliary contacts with reference to positions of a contactor, a measurement unit that measures signals from the current sensor and the auxiliary switch, a diagnosis unit that judges whether or not a malfunction occurs, and a display unit that displays a malfunction when a malfunction has been determined. A threshold is obtained in advance from multiple results of an opening/closing test performed beforehand. A calculation is made for characteristic times which are obtained from the close command current and signals from the auxiliary switch during actual operation of a circuit breaker. If a deviation is found by comparison with a threshold, a malfunction is determined.

In one example, a modified electrical device includes a body and at least one connector on the body to make power and control connections with an active cover plate. In some embodiments, a wall plate system may include a modified electrical device or receptacle and/or an active cover plate.

Position sensing and verification modules and a meter are provided. A module is configured to determine a position of one or more switch poles by measuring a current across the one or more switch poles. If a current is greater than or equal to a predetermined current threshold, the position is closed. If a current is less than the predetermined current threshold, the position is open. The module is configured to determine a line voltage with respect to a first reference value, determine a load voltage with respect to the first reference value, compare the line voltage to the load voltage to determine if the line voltage and the load voltage are within a predetermined threshold, and confirm the position of the one or more switch poles based on the comparison of the line voltage to the load voltage for the one or more line phases.

The present invention relates to a multi-contact disconnect switch for a lightning arrester configured to maintain contact points of a contact shaft evenly and to improve the operation stability of the contact shaft, and more particularly to, a multi-contact disconnect switch for a lightning arrester including a first body having a passage formed therein and a multi-contact unit positioned on one side of the passage, and a second body having a contact shaft inserted into the passage and coupled to the other side of the first body, wherein, when the second body is coupled to the first body in a contact state, an end of the contact shaft is in contact with the multi-contact unit, and thus the multi-contact unit is in multi-contact with a contact circumferential surface of the contact shaft.

A terminal for an electrical device having a feature to receive an auxiliary connection, the terminal including a cavity including an opening for receiving a first wire, and a terminal device positioned at least partially in the cavity, the terminal device including a distal portion extending external to the cavity, wherein the distal portion of the terminal device is configured to receive a connector of a second wire.

An example energy source for a work machine includes multiple battery cells connectable in parallel to form a battery system having a high pole and a low pole, a load bus to distribute energy from the battery system to the work machine, and a single point of connection between the battery system and the load bus. The single point of connection is a connector including a dual-pole single-throw (DPST) switch. The DPST switch includes a dual-switched circuit path to connect the high pole and the low pole to the load bus, and a single-switched circuit path to provide a switched connection of a high voltage interlock loop (HVIL) circuit.

Position sensing modules associated with a device are provided. The position sensing modules are configured to receive electrical characteristics associated with one or more switches of a device over a predetermined period of time, the one or more switches being configured to connect service to or disconnect service from a customer; calculate a match indicator for each phase of the device including the one or more switches, the match indicator indicating whether an electrical characteristic on a load-side of the device matches a same electrical characteristic on a line-side of the device for each phase of the device; and determine a position of the one or more switches based on the received electrical characteristics and the calculated match indicator for each phase of the device.

The present disclosure relates to a withdrawable base module for a switch. The withdrawable base module comprises a base coupled to a busbar for electrically connected to the switch; a conversion assembly coupled to the base and comprising a drive mechanism, a first female contact and a carrying mechanism adapted to carry the switch; and an auxiliary assembly being slidable relative to the conversion assembly and comprising a first male contact electrically connected to the switch; wherein the drive mechanism is operable to drive the auxiliary assembly to cause the first male contact to move towards and contact the first female contact. The withdrawable base module according to embodiments of the present disclosure can provide a test circuit for the switch, and can achieve the rocking-in or rocking-out of the switch without additional human intervention after completion of the test.

The disclosure relates to an electromagnetic switch, comprising: an armature; a slider configured to manually move to actuate the armature; and a deformable force transfer element positioned between the slider and the armature, wherein the slider is configured to be pressed against the deformable force transfer element to actuate the armature with a press force, and wherein the deformable force transfer element is configured to deform when a press force threshold value is exceeded to limit a transferable force from the slider onto the armature.

An electrical switching device, including a socket, a holder and electrical contacts housed in the holder. The holder includes a first end and a second end. The device includes a guidance device for guiding the first end of the holder relative to the socket. The device includes a fastener including a head, a tail, a first stem extending from the head to the tail, and a second stem extending from the head. The first stem is configured for passing through the holder and for being inserted at the tail into a first orifice of the socket, in order to retain the first end of the holder relative to the socket. A retaining member is configured for retaining the fastener, in order to rigidly connect the second end of the holder to the socket.