Abstract: The inkjet recording device has the feed mechanism for feeding the paper sheet in the feed direction, the inkjet head for ejecting the droplets towards the paper sheet conveyed by the feed mechanism, the dry section for drying the droplets attached on the paper sheet by landing, and the control mechanism for predicting the amount of heat necessary for drying the droplets based on either one of the paper sheet information of the paper sheet and the recording information to be recorded on the paper sheet to control the temperature of the dry section.

Abstract: A commercial power-system and a private power-generating system are connected via a high-speed current-limiting breaker. The commercial power-system supplies power to each important load via a first system. Each overlap switch is provided at each interlinkage point of the first system and a second system. Each overlap switch is switched step-by-step based on output of a private power generator so that the first system is disconnected, therefore, the private power-generating system supplies power to the important load. If there is a surge in the commercial power-system, the high-speed current-limiting breaker limits an over-current and interrupts power supply quickly to protect the important load.