| 摘要 |
PURPOSE:To enable the supply of bearing lubricant at a time of a house alternating current power source having been lost by, in parallel with an alternating current power source for normal operation, converting an alternating current to a direct current and connecting a storage battery and converting this direct current to an alternating current and making it a power source for a motor for driving a lubricant pump. CONSTITUTION:2A, one of the motors 2A, 2B driving a lubricant pump 1, is supplied with a power source from a house alternating current bus bar 22. As for 2B, the other one, a power source which is converted to a direct current by a battery charger 23 from an alternating current from the house alternating current bus bar 22 and is converted to an alternating current by a converter 24 from a direct current bus bar 20 is supplied. And a storage battery 21 is connected to the direct current bus bar 20. By this, even if the house alternating current power source is lost, the supply of lubricant is made possible by the motor 2B. |
