Abstract: An information terminal includes: a first communication unit that performs wireless communication with a wireless base station connected to a wide area network; a second communication unit that performs communication by a communication scheme different from the first communication unit; and a controller that: controls the second communication unit to receive first management information from a power management system that is installed in a facility and includes a storage battery, the first management information including information relating to the storage battery; and controls the first communication unit to transmit second management information generated based on the first management information received, to a server outside the facility as a destination, the server being connected to the wide area network.

Abstract: An information terminal includes: a first communication unit that performs wireless communication with a wireless base station connected to a wide area network; a second communication unit that performs communication by a communication scheme different from the first communication unit; and a controller that: controls the second communication unit to receive first management information from a power management system that is installed in a facility and includes a storage battery, the first management information including information relating to the storage battery; and controls the first communication unit to transmit second management information generated based on the first management information received, to a server outside the facility as a destination, the server being connected to the wide area network.

Abstract: A power supply system includes a current detection unit for detecting a current used by a load and an electric cell. The power supply system further includes a control unit for controlling the electric power stored in the electric cell to be supplied to the load if it is determined that the current detected by the current detection unit exceeds a cutoff threshold.

Abstract: In an electronic switch which includes a pair of terminal portions 14, 14, and self arc-suppressing elements Q21, Q22 having a one-way on and off control construction connected in inverse-series between the pair of terminal portions and which turns on and off the self arc-suppressing elements Q21, Q22 with phase control, shunt resistors R51, R52 provided between the pair of terminal portions 14, 14 and connected in series to the pair of self arc-suppressing elements Q21, Q22 and thyristors S71, S72 for extracting the gate voltages applied to gates of the self arc-suppressing elements Q21, Q22 upon driving are provided. Furthermore, thyristors S71, S72 are driven by the voltages across the shunt resistors R51, R52 generated when overcurrent larger than predetermined current flows through the shunt resistors R51, R52.

Abstract: In a phase controller used in a light control of an incandescent lamp, noise reduction, prevention of elements from damage due to short circuit current, downsizing and lower cost are purposed. A CPU circuit of a control circuit sets a gradual increase term during which a load voltage applied to the incandescent lamp is gradually increased by driving a self-quenching type switching device such as an IGBT. After passing the gradual increase term, a main switching device such as a TRIAC is turned on. The phase controller further comprises a current sensor such as a shunt resistor for sensing a value of the load current flowing through the self-quenching type switching device, according to need. The CPU circuit compares the sensed value of the load current with at least one reference value, and selects driving manner of the main switching device and the self-quenching type switching device corresponding to the result of comparison.

Abstract: To provide an electronic switch capable of instantly releasing overcurrent from flowing between a pair of terminal portions. In an electronic switch which comprises a pair of terminal portions 14, 14 ad self arc-suppressing elements Q21, Q22 having a one-way on and off control construction connected in inverse-series between, the pair of terminal portions and which turns on and off the self arc-suppressing elements Q21, Q22 with phase control, shunt resistors R51, R52 provided between the pair of terminal portions 14, 14 and connected in series to the pair of self arc-suppressing elements Q21, Q22 and thyristors S71, S72 for extracting the gate voltages applied to gates of the self arc-suppressing elements Q21, Q22 upon driving are provided. Furthermore, thyristors S71, S72 are driven by means of the voltages across the shunt resistors R51, R52 generated when overcurrent larger than predetermined current flows through the shunt resistors R51, R52.

Abstract: In a phase controller used in a light control of an incandescent lamp, noise reduction, prevention of elements from damage due to short circuit current, downsizing and lower cost are purposed. A CPU circuit of a control circuit sets a gradual increase term during which a load voltage applied to the incandescent lamp is gradually increased by driving a self-quenching type switching device such as an IGBT. After passing the gradual increase term, a main switching device such as a TRIAC is turned on. The phase controller further comprises a current sensor such as a shunt resistor for sensing a value of the load current flowing through the self-quenching type switching device, according to need. The CPU circuit compares the sensed value of the load current with at least one reference value, and selects driving manner of the main switching device and the self-quenching type switching device corresponding to the result of comparison.

Abstract: A solar battery SB for detecting the surrounding brightness is provided and a switching element SW is controlled based on output voltage of the solar battery SB. The switching element SW is made up of MOSFETs Q1 and Q2. To form an electronic automatic on/off switch, a triac Q is controlled by turning on/off the switching element SW.

Abstract: In the setting operation conducted by the handle 90 which is an operating section, an upper portion of the portion 26a′ of the slidable T-post 26 is pushed by the end portion of the cam 90b, and the slidable T-post 26 is moved. In accordance with the movement of the card 26, the suction cup block 23 is elastically deformed, and the suction cup 23b is held by the body 24 by a holding force of the suction cup 23b. The body 24 is composed of a porous body, and air flows from the ventilation hole 29 into a space formed between the suction cup 23b and the body 24, via the body 24. The slidable T-post 26 is biased ahead by the return spring 27. When the releasing operation is conducted by the handle 90, the cam 90b is rotated, and the end portion of the cam 90b is separated from the end of the portion 26a′ to be pushed.

Abstract: An electromagnetic relay assembly includes an actuator unit and at least one switch unit detachably connected with the actuator unit. The actuator unit includes an actuator casing accommodating therein an electromagnetic assembly and a movable actuator frame magnetically attracted by the electromagnetic assembly to move between first and second positions. The switch unit Includes a switch casing accommodating therein a switch assembly capable of selectively assuming one of an ON state in response to movement of the movable actuator frame from the first position to the second position and an OFF position in response to movement of the movable actuator frame from the second position to the first position. The actuator casing and the switch casing have mating engagement members by which the actuator unit and the switch unit can be separably connected together while the movable actuator frame in the actuator unit can be drivingly coupled with the switch assembly In the switch unit.

Abstract: A damper is provided by a plurality of chambers defined between stacked thin sheet members and containing a fluid for flowing therein through a communicating section, the chambers being made to be of a small height in the direction perpendicular to the plane of the sheet members and to form a buffer section with at least one of the chambers. With such damper employed in electromagnet assemblies and eventually relays including the assemblies, they can be sufficiently minimized in size, and their manufacture can be also made extremely easier.

Abstract: An electromagnetic relay includes a pair of contacts of high fusion-bonding resistance and a further pair of contacts of low contact resistance, which pairs being connected mutually in parallel relationship, with an actuator of an electromagnet unit interposed between them and respectively having a movable contactor carrying a movable contact of the pair and provided for contact opening and closing with respect to a stationary contact of the pair by means of the actuator of the electromagnet unit, whereby the pair of contacts of low contact resistance can be prevented from causing any fusion-bonding and any temperature rise around the pair can be effectively restrained.

Abstract: A contact device is provided with an additional mass member secured to a movable contactor carrying a movable contact capable of opening and closing contacts with a stationary contact, for providing to the movable contactor a mass acting in a direction perpendicular to longitudinal axis of the contactor. A rolling motion is thereby caused to occur in the movable contactor upon contact closing motion so that the movable contact can be prevented from being fusion-bonded to the stationary contact.