Abstract: Provided is a power conversion device with which a region in which an electronic component is mountable in a first printed wiring board of a first substrate can be enlarged. The power conversion device includes a power module installing member, a power module, a bus bar assembly, a first substrate provided on the bus bar assembly, and a second substrate provided on the bus bar assembly. The first substrate includes a first printed wiring board, and a signal terminal connector and a first board-to-board connection connector which are each provided on the first printed wiring board. The second substrate includes a second printed wiring board and a second board-to-board connection connector provided on the second printed wiring board. The signal terminal connector is connected to a signal terminal of the power module. The first board-to-board connection connector and the second board-to-board connection connector are connected to each other.

Abstract: [Technical Problem] In a power conversion device for stepping up or stepping down the input voltage, when voltage converter become out of order, it is not possible to specify an IGBT element and a current sensor, which is in an extraordinary fault condition. [Solution to Problem] The power conversion device is configured to detect a voltage value of a smoothing condenser, connected in parallel to a load, where the load is to be connected to the power conversion device; detects, by a first current sensor, a current which flows through switching elements in a plurality of voltage converter; decides an abnormality of a switching element, by switching the switching element one by one; specifies the abnormality of the switching element; and specifies that the first current sensor is in an abnormal state, in a case where there is no abnormal state switching elements.

Abstract: [Technical Problem] In a power conversion device for stepping up or stepping down the input voltage, when voltage converter become out of order, it is not possible to specify an IGBT element and a current sensor, which is in an extraordinary fault condition. [Solution to Problem] The power conversion device is configured to detect a voltage value of a smoothing condenser, connected in parallel to a load, where the load is to be connected to the power conversion device; detects, by a first current sensor, a current which flows through switching elements in a plurality of voltage converter; decides an abnormality of a switching element, by switching the switching element one by one; specifies the abnormality of the switching element; and specifies that the first current sensor is in an abnormal state, in a case where there is no abnormal state switching elements.

Abstract: An aqueous fire preventing suspension is prepared by diluting a mixture of magnesium ammonium phosphate and an emulsion of a resin and a surfactant which can be sprayed onto weeds in fields in a concentration of greater than 30 wt% magnesium ammonium phosphate per weight of dried weeds.