| 摘要 |
PURPOSE:To provide a connecting unit for the parallel operation of AC power supply units in which no output voltage appears (no reverse flow) between power supply terminals in exposed state even though some plugs are not connected to the convenience outlets of a power supply unit. CONSTITUTION:Where a grounded plug 3 or 6, which is not connected to a generator 1 or 2, is present, an open state occurs between a ground terminal 3c or 6c of the grounded plug 3 or 6 and an exclusive ground terminal 4 or 4, so that switch circuits 8a and 8b or 13a and 13b become OFF, therefore, an output voltage from the generator 1 or 2 input to the grounded plug 3 or 6 connected to the generator i or 2 will not appear at the grounded plug 3 or 6 which in not connected. |
