| 摘要 |
Electrical energy is charged to a dielectric by using an energizing unit. A relay apparatus includes a first electromagnetic relay and a second electromagnetic relay. One light-emitting transistor is turned on by self-maintaining the second electromagnetic relay and, then, one light-receiving transistor is turned on. Another light-emitting diode is turned on by discharging the dielectric and another light-receiving transistor is turned on. A power voltage is applied to a base of a transistor for start, and the transistor for start is turned on. The first electromagnetic relay is self-maintained, an interval between output terminals is energized, and a load is driven. Accordingly, the relay apparatus can be miniaturized with a safety function and with low costs.
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