Abstract: An example system in a fire pump room may comprise a monitoring component that is configured to receive data from two or more pump room devices of a fire pump room. The monitoring component may include a plurality of input ports and each of the two or more pump room devices may be communicatively coupled to the monitoring component via a corresponding input port. The system may further comprise a wireless network interface controller communicatively coupled to a server in a network via a wireless access point, and a memory configured to store subscription information for one or more subscribing parties. Additionally, the system may comprise a processing component configured to send an indication of the received data to at least one of the one or more subscribing parties via the wireless network interface controller.

Abstract: A user interface for electrical components, such as a transfer switch, is presented having a first part mounted to an electrical enclosure and a second part that is removable from the first part without accessing the electrical enclosure or disconnecting power from the electrical components within the enclosure.

Abstract: An automatic autonomous redundant switch configured for providing energy from either a first power source or a second power source to a load is provided. The automatic switch includes a first automatic transfer switch (ATS) and a second ATS. The automatic switch further includes an interconnecting bus configured to connect the first ATS and the second ATS, and at least one controller configured to control the operation of the first ATS and the second ATS. Still further, the first ATS and the second ATS each include a respective transfer-switch mechanism, a respective bus attachment configured to connect to the interconnecting bus, and a respective motorized rack-out mechanism having a powered actuator.

Abstract: A short circuit detection circuit for an electrical circuit includes a secondary power supply. The electrical switch is connected in series with a load and is selectively connected in series with a first power supply. The secondary power supply is limited in comparison to the first power supply in terms of voltage and/or current. A first resistance is electrically connected between the secondary power supply and a first terminal of the electrical switch. A voltage measurement circuit measures a voltage at the second end of the first resistance. A controller is configured to, while the electrical switch is controlled to an open state, energize the secondary power supply and obtaining a first voltage measurement. In response to the first voltage measurement indicating that a voltage across the first resistance is greater than a predetermined threshold, the controller identifies a low-resistance condition in the electrical switch.

Abstract: Multiple bus generator and load control monitoring system for electrical switchgear is provided. In one arrangement, the system is designed to allow for the increased functionality of a single bus system to be used in multiple bus systems wherein the multiple buses are separated or combined together to act as a single bus. Each bus within the multiple bus system may be able to utilize increased functionality of a typical generator bus and load control system independently if separated. Separate bus structures may be separated by some sort of isolation device, for example: a circuit breaker, transfer switch, or the like. If the bus segments are connected together via isolation devices, then the combination of the overall connected bus structure will act as a single entity, while containing enhanced automation functions.

Abstract: Methods and systems for control of a power-quality measuring or monitoring device, such as a transfer switch, are provided. An example method includes a transfer-switch controller of a transfer switch receiving an input command from a user. The method further includes, in response to receiving the input command, the transfer-switch controller entering a safe state, wherein in the safe state operational settings of the transfer switch remain unchanged. Still further, the method includes, after entering the safe state, the transfer-switch controller providing, based on operational data specific to the transfer switch, information regarding a feature of the transfer switch.

Abstract: Methods and systems for transfer-switch controller backup and transfer-switch controller operation are provided. An example backup apparatus includes a memory configured to store transfer-switch data related to a first transfer-switch controller, wherein the first transfer switch-controller is a controller for a given transfer switch. The apparatus is capable of interfacing with a communication interface of the first transfer-switch controller. The apparatus is further capable of being removed from the communication interface of the first transfer-switch controller and thereafter interfacing with a communication interface of a second transfer-switch controller, wherein the second transfer-switch controller is a replacement controller for the given transfer switch.

Abstract: A transfer switch including a lockout-tagout assembly and lockout-tagout method are provided. An example method includes a latch of a transfer switch actuating a first switch, wherein actuating the first switch sends an inhibit signal to an electronic controller of the transfer switch. The example method further includes the latch actuating a second switch, wherein actuating the second switch opens operator cutoff thereby preventing function of an operator assembly of the transfer switch. Still further, the example method includes, after the latch actuating the first switch and the second switch, locking the latch so as to mechanically prevent the source contact from closing.

Abstract: A lead screw operated drawout mechanism for an electrical system is disclosed. The lead screw operated drawout mechanism includes a lead screw, a nut, a drive shaft and a connecting mechanism. The lead screw is supported on a support frame in a way such that the lead screw rotates with respect to the support frame. The nut is disposed on the lead screw, wherein rotary motion of the lead screw facilitates linear motion of the nut on the lead screw. The drive shaft is rigidly disposed on the nut and configures linear motion along with the nut. The connecting mechanism is functionally connected to the drive shaft and the electrical system for facilitating activation and de-activation of the electrical system.

Abstract: An example method for monitoring the operation of a metal-oxide varistor (MOV) may involve monitoring an operating value of at least one parameter of the MOV using at least one sensor. Further, the method may involve determining, using one or more processors, that a difference between the operating value and a reference value corresponding to the at least one parameter satisfies a predetermined threshold condition corresponding to the at least one parameter. And the method may involve responsive to determining that the difference between the operating value and the reference value satisfies the predetermined threshold condition, transmitting a notification indicative of a potential failure of the MOV to at least one device.

Abstract: A short circuit detection circuit for an electrical circuit includes a secondary power supply. The electrical switch is connected in series with a load and is selectively connected in series with a first power supply. The secondary power supply is limited in comparison to the first power supply in terms of voltage and/or current. A first resistance is electrically connected between the secondary power supply and a first terminal of the electrical switch. A voltage measurement circuit measures a voltage at the second end of the first resistance. A controller is configured to, while the electrical switch is controlled to an open state, energize the secondary power supply and obtaining a first voltage measurement. In response to the first voltage measurement indicating that a voltage across the first resistance is greater than a predetermined threshold, the controller identifies a low-resistance condition in the electrical switch.

Abstract: Example devices, systems, and methods disclosed herein relate to controlling operation of a fire pump or jockey pump of a fire pump system. An example fire pump control system may comprise a jockey pump controller configured to control operation of a jockey pump and a fire pump controller configured to control operation of a fire pump. The jockey pump controller may be configured to determine a first pressure value based on an output of a jockey pump pressure sensor. The fire pump controller may be configured to receive the first pressure value from the jockey pump controller. The fire pump controller may also be configured to determine a second pressure value based on an output of a fire pump pressure sensor and select a predetermined action based on a comparison of the first pressure value and the second pressure value. Additional example devices, systems, and methods are described herein.

Abstract: Methods and systems for operating a fire pump controller are provided. An example method includes causing a power supply coupled to a an electric motor-driven water pump through a fire pump controller in a fire protection system to provide power to the water pump, and monitoring the performance of the power supply during the motor starting period by measuring the voltage and/or current of its output under motor load conditions. The method may also include providing visual indications, such as traces or starting signatures of motor power supply voltages and/or currents during the motor starting period for the purposes of observation and troubleshooting motor power supply and power train performance problems.

Abstract: An automatic transfer switch (ATS) for supplying power to a load is provided. The ATS includes a main transfer switch portion configured to connect one of a first or second power source to the load. The ATS also includes a bypass transfer switch portion configured to form a bypass connection from either the first or second power source to the load. The bypass transfer switch portion includes (i) a first bypass switch configured to connect the first power source to the load upon closing of the first bypass switch and (ii) a second bypass switch configured to connect the second power source to the load upon closing of the second bypass switch. Further, the ATS includes a primary load connection connecting the main transfer switch portion to the load, where the primary load connection is formed at least in part by the first and second bypass switches.

Abstract: A latching arrangement for detachably mounting a device on a DIN rail. A support member configured to be mounted on the DIN rail. A guiding slot configured on a same side of the device on which the support member is configured. An engaging lug received in the guiding slot and adapted to move between an engaging, extended configuration and a retracted, disengaging configuration. An urging element cooperating with the engaging lug and the device, the urging element adapted to be configured between a first operative configuration in which the urging element urges the engagement lug towards the support member and a second operative configuration in which said urging element is moved to facilitate moving of the engaging lug away from said support member.

Abstract: A movable contact assembly for use with a transfer switch, the moveable contact assembly comprising a center portion, a first conductor portion extending from the center portion, the first conductor portion comprising a first arm comprising two longitudinal extending fingers; and a second conductor portion extending from the center portion, the second conductor portion comprising a second arm comprising two longitudinally extending fingers. The moveable contact assembly may be pivoted about the center portion from a first position to a second position. In the first position, the two longitudinally extending fingers of the first conductor portion resides in a conductive state with a blade connector of a first stationary contact assembly and in the second position, the two longitudinally extending fingers of the second conductor portion resides in a conductive state with a blade connector of a second stationary contact assembly.

Abstract: A method of analyzing the characteristics of a power source includes receiving a power source having at least one phase and sensing voltage signals of each phase of the at least one phase. The method includes detecting a zero crossing event of a selected phase of the at least one phase based on the sensed voltage signals of the selected phase. The method also includes determining, using a processor, voltage information for each phase of the at least one phase based on the corresponding sensed voltage signals. The method further includes outputting a series of pulses via a galvanic isolator in response to the zero crossing event. Respective lengths of some or all of the pulses in the series are based on the corresponding voltage information for each of the at least one phase.

Abstract: An expandable electrical enclosure system is presented where expansion collars can be serially added to an existing base box to increase the dimension of the enclosure in only the Z direction. A removable cover can be disconnected and connected as each expansion collar is added.

Abstract: A bus connector configured for receiving a bus is provided. An example bus connector includes a plurality of contact fingers configured to engage with the bus. The plurality of contact fingers include a first set of contact fingers and a second set of contact fingers arranged substantially parallel to one another, and the first set and second set clamp the bus when the bus is inserted between the first set and the second set. The bus connector further includes a connector frame, wherein the connector frame is configured to hold the plurality of contact fingers. The plurality of contact fingers includes contact fingers of a first length and contact fingers of a second length, wherein the second length is different than the first length.

Abstract: A cover assembly for an automatic transfer switch (ATS) is provided. The ATS includes an operator-panel portion and a pole-assembly portion, wherein the operator-panel portion comprises at least one solenoid and associated wiring. The cover assembly includes and operator-panel cover and a pole-assembly cover. The operator-panel cover is configured to cover the operator-panel portion such that the at least one solenoid and associated wiring are substantially enclosed, the operator-panel cover comprising a first plurality of ventilation louvers for heat dissipation. Further, the pole-assembly cover is configured to cover the pole-assembly portion, the pole-assembly cover comprising a second plurality of ventilation louvers for heat dissipation.