| 摘要 |
PURPOSE: A modular uninterruptible power supply system having a flexible expanded board which includes a current transformer differential loop is provided to reduce the deviation of active power using an instantaneous value of detected current deviation. CONSTITUTION: A flexible expanded board shares loads of uninterruptible power supply (UPS) modules. The flexible expanded board is formed of a current transformer differential loop and a synchronous bus. The flexible expanded board is made up a relay for parallel control and a contact point. A b-contact point is used before module insertion. The b-contact point is opened with an operation of the relay. |
