The teaching equipment of electromechanical system provided by the present invention is used to connect an emergency stop loop of an electromechanical equipment, including a multi-stage key switch, an enabling switch and a safety control device. The multi-stage key switch is used to switch between a first mode and a second mode. The multi-stage key switch generates a switching signal during switching. The enabling switch is connected to the emergency stop loop. The safety control device is used to receive the switching signal. The safety control device includes a transient emergency stop circuit and a disconnection loop time. The safety control device triggers the emergency stop loop to enter the emergency stop state according to the switching signal. The emergency stop state includes that the transient emergency stop circuit interrupts the emergency stop loop until the disconnection loop time is up.

Discussed is a contactor management method and a battery system to perform the method, wherein the battery system includes a contactor connected between a battery pack and an external device; a voltage measurer to measure a first operation voltage supplied to the contactor; and a controller to determine opening or closing of the contactor based on the first operation voltage measured from the voltage measurer, wherein the controller determines the contactor as open in an opened state when the first operation voltage is not supplied to the contactor, determines the contactor as closed in a closed state when the first operation voltage is supplied to the contactor, and counts each openings and closings of the contactor and determines a replacement time of the contactor based on a sum value of the counts exceeding a predetermined reference value.

In a case where a load current flows in an energized state where a power supply is connected to a load, it is assumed that a measured voltage fluctuates due to a voltage drop caused by contact resistance of a relay contact, and thus the relay state cannot be accurately diagnosed. A relay control device that controls a relay connected between a secondary battery and a load device calculates, in a failure diagnosis during energization with the relay being closed, a contact resistance value of the relay based on a voltage applied to the relay and a current flowing through the secondary battery, and determines a first threshold set as a variable value in accordance with a temperature change amount of the relay and compares the calculated contact resistance value with the first threshold to diagnose a failure of the relay.

A power contact electrode plasma therapy circuit includes a pair of terminals adapted to be connected to a set of switchable contact electrodes of a power contact. A plasma ignition detector is configured to detect an electrical parameter over the switchable contact electrodes indicative of the formation of plasma between the switchable contact electrodes and output a plasma ignition signal based on the electrical parameter as detected. A plasma burn memory is configured to receive and store the plasma ignition signal. A controller circuit is configured to receive from the plasma burn memory the plasma ignition signal, start a time based on receipt of the plasma ignition signal, and upon the timer meeting a time requirement, output a plasma extinguish command. A plasma extinguishing circuit, configured to bypass the pair of terminals upon receiving the trigger signal to extinguish the plasma between the switchable contact electrodes.

A circuit breaker is connected between an input supply line and an output supply line of a low-voltage electrical system and comprises a test signal transceiver and evaluator. The test signal transceiver comprises a first transceiver section being capacitively or inductively coupled, at a first coupling point, with the input supply line, and a second transceiver section being inductively coupled, at a second coupling point, with the input or output supply line. One of the first and second transceiver section is a test signal transmitter configured to generate and inject an AC test signal into the input or output supply line, and the other one of the first and second transceiver section is a test signal receiver configured to receive the test signal from the input or output supply line. A test signal evaluator is configured to determine the state of the circuit breaker from the received test signal.

A control system may include a processor that may receive a first dataset associated with power properties of a rotating load device coupled to a relay device. The processor may also determine frequency properties based on the power properties and determine a switching profile to control moving a first armature of three armatures in the relay device based on the frequency properties. The switching profile is configured to control movement of the first armature between a first position and a second position, and wherein the switching profile comprises a firing angle for moving the first armature with respect to an electrical waveform, a second armature, and a third armature. The processor may then control a current provided to a relay coil of the relay device based on the switching profile, such that the relay coil causes the first armature to move.

A system for monitoring a circuit breaker includes: at least one sensor and a processor. The at least one sensor is configured to be located and utilized to obtain at least one sensor data of a main shaft of an operational circuit breaker, and the at least one sensor is configured to provide the at least one sensor data of the main shaft of the operational circuit breaker to the processor. The processor is configured to determine position and/or velocity information for a moveable contact of the operational circuit breaker, where the determination comprises analysis of the at least one sensor data of the main shaft of the operational circuit breaker by a trained neural network implemented by the processor.

An automatic transfer switch (100) for automatically switching an electrical load between two power sources is provided. Two power cords (106) enter the ATS (A power and B power inputs) and one cord (109) exits the ATS (power out to the load). The ATS has indicators (107) located beneath a clear crenelated plastic lens (108) that also acts as the air inlets. The ATS (100) also has a communication portal (103) and a small push-button (104) used for inputting some local control commands directly to the ATS (100). The ATS (100) can be mounted on a DIN rail at a rack and avoids occupying rack shelves.

A device includes a device input, an output connector configured to connect to a current loop, and current loop transmitter circuitry. The current loop transmitter circuitry receives, via the device input, an input from a dry contact switch, and translates a state of the dry contact switch to a current loop current. The current loop transmitter circuitry transmits the current loop current via the output connector through the current loop.

This disclosure provides methods, devices, and systems for controlling motion-activated switches. The present implementations more specifically relate to relay controller that prevent motion-activated switches from turning off devices associated with an environment in which people are present. In some aspects, a motion-activated switch may include a relay controller coupled to a motion sensor, a camera, and a relay. The motion sensor outputs a motion trigger to the relay controller responsive to detecting motion in an environment. The motion trigger may cause the relay controller to acquire one or more images of the environment, via the camera, and selectively toggle the relay based on the acquired images. For example, the relay controller may close the relay responsive to identifying an image that includes an object of interest or may open the relay controller may open the relay responsive to identifying an image that does not include an object of interest.