Abstract: A circuit interrupting device with overload current detection is provided. It comprises a hot conductor, a main contactor and a first electromagnetic device configured to remove power from an electrical circuit when overload current exceeds a predetermined % of a rated load current. It further comprises a section of conductor that generates heat and a thermal overload current detection mechanism including a temperature sensing switch having contacts. The temperature sensing switch closes the contacts when a temperature reaches a predefined temperature threshold corresponding to an overload current, in which case the temperature sensing switch electrically couples power to a second electromagnet which is disposed across the hot conductor and a connection to a neutral conductor. The energized second electromagnet generates a magnetic force capable of moving an armature that unlatches the latch releasing the spring to open the main contactor removing power from the electrical circuit.

Abstract: A solid-state circuit breaker comprises a solid-state device configured between line-in and line-out terminals, an air-gap forming apparatus coupled in series with the solid-state device to complete a current conducting path and a sensing and control unit to control a gate of the solid-state device. It further comprises a first switching component coupled in series with an actuator coil across a connection point after an air gap and a neutral such that the sensing and control unit to control a gate of the first switching component. It further comprises a second switching component coupled between the line-out terminal and a terminal between the actuator coil and the first switching component such that the sensing and control unit to control a gate of the second switching component. The actuator coil is configured to discharge and dissipate a recovery voltage associated therewith an inductive load.

Abstract: A method for analytics in heating, ventilation, and air conditioning (HVAC) is described. Operation of an air-handling unit in an HVAC system is measured, including fan speed, pressure, power input, and flow. The measurements are transmitted to a processor, which analyzes the operation of the air-handling unit. The analysis includes optimizing a heuristic model of air handling in the HVAC system based on a combination of two or more of the fan speed, pressure, power input, or flow, and determining, based on the optimized heuristic model, a diversity from a fan flow set point and a fan designed maximum flow. A display presents an indication of a mismatch of a fan with a space based on the diversity.

Abstract: A circuit interrupting device with a temperature activated permanent lockout trip mechanism is provided. The temperature activated permanent lockout trip mechanism is located in close proximity to a section of conductor that generates heat. An energized first solenoid generates a magnetic force capable of moving an armature that unlatches a latch releasing a spring to open a main contactor removing power from an electrical circuit. The temperature activated permanent lockout trip mechanism upon reaching a predetermined temperature which is higher than the predetermined temperature threshold of the temperature sensing switch also generates a mechanical force capable of moving the armature that unlatches the latch releasing the spring to open the main contactor removing power from the electrical circuit.

Abstract: Methods, mediums, and systems include use of a system manger application in a data processing system for fault detection a building automation system using deep learning, to receive point data for a hardware being analyzed, where the received point data is contaminated data, train a deep learning model for the hardware being analyzed, generate predicted data based on the deep learning model, analyze the predicted data and the received point data, identify a fault in the hardware being analyzed according to the received point data and the predicted data, and produce a fault report according to the identified fault.

Abstract: A building automation system (BAS) may control ultra-violet (UV) lights to intelligently disinfect a disinfection environment (e.g., a patient room). In some examples, the BAS includes a disinfection environment tracking engine and a UV light control engine. The disinfection environment tracking engine may access patient room data indicative of a state of a patient room of a patient, medical data of the patient, the medical data of the patient specifying a medical condition of the patient, real-time location data of the patient. The UV light control engine may control operation of UV lights to disinfect the patient room based on the patient room data, the medical data of the patient, and the real-time location data of the patient.

Abstract: A load center comprises a common instantaneous tripping unit that works on a principle of solid state switching. The load center further comprises a plurality of branches of branch circuit breakers each of which is coupled to the common instantaneous tripping unit via a corresponding high power connection and a corresponding low power connection such that the common instantaneous tripping unit feeds the plurality of branches at the same time. The common instantaneous tripping unit interrupts a short circuit fault in an interruption time which is significantly reduced thus reducing or eliminating chances for a personal injury during the short circuit fault.

Abstract: A system and method is provided for controlling building fluid distribution. The system may cause a variable air volume building ventilation system to operate at different combinations of different fan speeds for different damper opening configurations. For each different combination of fan speed and damper opening configuration, the system may: determine a static pressure measurement for each terminal unit based on a flow measurement determined by terminal box controllers using a pressure sensor; and determine a static pressure measurement for the supply fan from a pressure sensor mounted in a ventilation duct downstream of the at least one supply fan and upstream of each terminal unit. The system may also determine and store in each terminal box controller, a friction loss coefficient based on the static pressure measurements for the supply fan and the terminal units.

Abstract: An arc fault detection circuit interruption (AFCI) device includes a high frequency arc noise sensor and an arc fault detection circuit for sensing a high frequency arc noise. The high frequency arc noise sensor is disposed across a hot conductor and a neutral conductor and includes a surge protection device and a surge protection circuit such that the surge protection device protects against a first voltage surge in a first range of thousands to hundreds volts and the surge protection circuit protects against a second voltage surge in a second range of hundreds to few volts. The arc fault detection circuit is coupled in series with the high frequency arc noise sensor. The arc fault detection circuit is coupled to a series combination of a trip solenoid or electromagnet and a silicone-controlled rectifier disposed across the hot conductor and the neutral conductor.

Abstract: There is described a mobile device and method for commissioning air intake control of an environmental control system. A communication component receives multiple air measurements from an air flow sensor, in which the air flow sensor is positioned in a duct compartment of the environmental control system. The processor generates multiple air flow tables based on the multiple air measurements, multiple fan speeds associated with the environmental control system, and multiple damper positions associated with the environmental control system. The communication component transmits the multiple air flow tables to an air intake controller of the environmental control system.

Abstract: A switchgear assembly is provided with an integrated arc flash venting system. The switchgear assembly comprises a circuit breaker section including an arc flash vent stack having blow open flaps disposed on a switchgear roof to exhaust arc flash gases and contaminants away from a front of the circuit breaker section, towards a rear of the circuit breaker section and a top of the circuit breaker section. The circuit breaker section includes a circuit breaker compartment having a back wall with a back vent opening for the passage of all the arc flash gases and contaminants. The circuit breaker section further includes a bus compartment. All of the arc flash gases and contaminants pass through the back vent opening in the circuit breaker compartment and into the bus compartment which forms a single pathway for channeling all of the arc flash gases and contaminants to the arc flash vent stack.

Abstract: A rotor assembly for an electrodynamic machine is provided. The rotor assembly comprises a lamination section and an end connector. The lamination section comprises rotor lamination sheets formed to define an annular array of axial cooling ducts mechanically supported by a plurality of radial and arched structural members that define an array of arched or angled supports to readily pass a magnetic flux via an optimal flux path. The lamination section further comprises rotor slots, with rotor conductor bars being disposed in the rotor slots. The end connector is supported by the rotor conductor bars. An axial space is formed in the lamination section by the annular array of axial cooling ducts for guiding a cooling fluid flow in an axial direction through the rotor assembly.

Abstract: An electric machine includes a frame and a plurality of electrical components including a rotor assembly and a stator assembly. The electric machine further includes an auxiliary blower mounting arrangement for cooling the electrical components and/or a modular exhaust assembly for noise attenuation, wherein the modular exhaust assembly further has one or more louvers allowing cooling fluid for cooling the electrical components to exit the electric machine.

Abstract: Credentialing systems, methods, and mediums. A method includes receiving, by a credentialing system, an access code and a device location from a mobile device. The device location indicates the current geographic location of the mobile device. The method includes comparing the received access code to a stored site code. The method includes, when the received access code matches a stored site code, determining whether the device location corresponds to a site location of a target system associated with the site code, and determining whether the access code is received during a valid access period associated with the site code. The method includes, when the received access code matches the stored site code, the device location corresponds to the site location, and the access code is received during the valid access period, then granting access for the mobile device to the target system.

Abstract: There is described an epicyclic gear system and method of a flow control actuator for providing selectable torque and speed ranges. The epicyclic gear system comprises an input shaft, a gear engagement system, and an output shaft. The input shaft is configured to receive an input rotational motion. The gear engagement system is configured to receive a gear ratio command from a clutch mechanism and restrict movement of one or more gears of multiple planetary gears in response to the gear ratio command. The output shaft is configured to provide an output rotational motion based on the input rotational motion at the input shaft. The output rotational motion is different from the input rotational motion in response to restricting movement of one or more gears of the planetary gears.

Abstract: A circuit breaker including at least two contact tip that comprise an electrical contact material comprising silver (Ag) and tungsten (W). The contact tip further comprises a graphene material (Gr) additively mixed in Ag as being denoted as AgGr0.3% or AgGr0.5% which is mixed with tungsten (W) to form (AgGr0.3)W50 or (AgGr0.5)W50 called a silver-graphene tungsten composite material.

Abstract: There is provided an alarm system and method for managing current of a notification appliance circuit. The system comprises a notification appliance circuit, in which a control panel and notification appliances are coupled to the notification appliance circuit. The control panel provides an activation signal in response to an emergency condition. The notification appliances are configured with time delays and receive an activation signal from the control panel. The notification appliances discharges energy storage components based on at least the activation signal and recharges the energy storage components at different time intervals based on the time delays in response to discharging the energy storage components.

Abstract: An approach that collects sensor data associated with a building automation system having filters and determining the optimal timing of the replacement of filters that includes replacement dates based upon use, utility, and labor costs.

Abstract: An system (100) for updating firmware on an industrial device (130) includes a user interface device (110) storing a computer program (200) with executable instructions (210, 212, 214, 220, 222); one or more industrial devices (130) comprising firmware; and a communication network (120) interfacing with the user interface device (110) and the industrial device (130) and adapted to transmit data, wherein the computer program (200) of the user interface device (110) comprises instructions (210) to scan the communication network (120) and to identify an industrial device (130) that requires an update of the firmware, and wherein the computer program (200) of the user interface device (110) comprises further instructions (214) to update the firmware on the industrial device (130) via the communication network (120) after establishing communication with the industrial device (130). Further, a method (300) and a computer program (200) for updating firmware on industrial devices (130) are provided.

Abstract: A location tracking and distance monitoring system includes a plurality of portable transponders, each portable transponder having a wireless transmitter and configured to transmit location data, a location database storing the location data transmitted by the plurality of portable transponders, wherein each portable transponder is identified as a tag with co-ordinates in the location database, a distance monitoring module comprising at least one processor and configured via computer executable instructions to access the location data from the location database, define a coverage region with a coverage radius around each tag, determine overlapping zones of the coverage regions of the tags, and generate tag clusters based on the overlapping zones. Further, an associated method and computer readable medium are provided.