| 摘要 |
<p>PURPOSE:To stably stop a generator by switching an operation by an automatic voltage regulator to an operation by an automatic field regulator according to the output of a defect detector which is composed of a signal for disconnecting parallel breakers and a closed contacts of the breakers. CONSTITUTION:When an emergency stop command is applied, a main control relay b contact 14 is closed, and a load of a generator 6 is lowered. Subsequently, when no load is detected, a command for disconnecting parallel breakers 7 is generated to close a contact 15. At this time, the breakers 7 become defective and are not disconnected but remain inoperative, the a-contact 7a of the breakers 7 remain closed, and a set time limit relay 16 is energized. In this manner, a keep relay 13 is reset, and the operation of the generator 6 is switched from the operation by an automatic voltage regulator 2 to the operation by an automatic field regulator 10.</p> |
