Abstract: An indicating device, in particular a pressure gauge, including: a basic housing including a mechanism for driving a rotating needle indicator, movable relative to a dial, an interface housing attached to the basic housing, at least one rotary screen carried by the interface housing, for locating an operating area, of which the angular position can be adjusted about the axis of the needle, a protective cover removable attached to the interface housing and making it possible, when removed, to adjust the position of the rotary screen without separating the interface housing from the basic housing.

Abstract: A device for providing an output fluid at a regulated output pressure includes a pressure control unit controlled via a pilot control pressure and a pilot control unit that provides the pilot control pressure. The pressure control unit includes an inlet chamber for an input fluid having an input pressure, an outlet chamber for the output fluid having the regulated output pressure and a first valve unit that acts between the inlet chamber and the outlet chamber. A first diaphragm of the pressure control unit is acted upon by the pilot control pressure. A second diaphragm, which is mechanically coupled to the first diaphragm is acted upon by the output fluid having the output pressure acts. At least the second diaphragm mechanically acts on the first valve unit.

Abstract: Steel for manufacturing cemented steel parts, characterized in that the composition thereof in weight percentages is: 0.1%?C?0.15%; 0.8%?Mn?2%; 1%?Cr?2.5; 0.2%?Mo?0.6%; trace elements?Si?0.35%; trace elements?Ni?0.7%; trace elements?B?0.005%; trace elements?Ti?0.1%; trace elements?N?0.01% if 0.0005%(5ppm)?B?0.005%, and trace elements?N?0.02% if trace elements?B?0.0005%(5ppm); trace elements?Al?0.1%; trace elements?V?0.3%; trace elements?P?0.025%; trace elements?Cu?1%, preferably?0.6%; trace elements?S?0.1%; the remainder being iron and impurities resulting from production. A cemented steel part made with this steel, and to the method for manufacturing same.

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: A device for regulating the flow of a fluid is provided with a valve housing having at least two valve connections, which are fluidically connected to one another via a valve chamber, at least one valve seat, which has a fluid connection to the valve chamber and one of the valve connections, a valve element, which has an actuating section located outside of the valve chamber and a closing body located within the valve chamber for the at least one valve seat. An electromagnet having a solenoid armature acts upon the actuating section. The solenoid armature is supported via two flat springs.

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: The invention relates to a solenoid valve including an electromagnet (17, 4, 3, 10) made of a flat movable core (10), a fixed core (3) and a coil (17), the solenoid valve comprising a body (4) which also belongs to the electromagnet and includes an opening (23) located at the rear of the body (4), opposite the supply opening (18), for inserting the flat movable core (10), the fixed core (3) and the coil (17). The body (4) is secured to a retaining ring (8) made of a non-magnetic material, a flat spring (9) being compressed between the retaining ring (8) and the flat movable core (10).

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 device for radially compressing an elastic line for a flowing medium at a line point includes an insertion channel (11) for insertion of a line section of the line. The insertion channel (11) includes a pressure element (12) displaceable transversely to the insertion channel (11), and a counterpart (13) located opposite the pressure element (12) on the insertion channel (11). Each of the pressure element (12) and counterpart (13) extends into the insertion channel (11). An actuator acts upon the pressure element (12) for the displacement thereof. The actuator preferably is an electric-motor drive unit (14) having an output shaft (15) and a translation module (16) for converting rotational motion of the output shaft (15) into linear motion of the pressure element (12).

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.

Abstract: A profiled arc splitter plate for a switch having a fixed contact and a movable contact is provided to increase electromagnetic attractive forces on the arc generated during contact separation. The plate (300) comprises a body (306) defining an operatively inverted substantially V-shaped recess having a center notch (302) provided at the vertex of the recess and at least one protrusion (304) defined on either side of the center notch (302) along the inclined side walls of the recess, the movable contact of the switch displaceable through the recess without contacting the inclined side walls, in a spaced apart manner from the protrusions (304) and the center notch (302). Chamfers 308 are provided at an end of the plate (300) proximal to the vertex of the recess to provide an exit for hot gases towards the vent of the arc chamber.

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 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.