| 摘要 |
PURPOSE: An emergency power supply system of an elevator is provided to minimize noise by supplying a proper voltage to the terminal device and the base device of an interphone device. CONSTITUTION: An interphone device(104,107,109) are used as the emergency calling device of an elevator. An emergency power device supplies emergency power to the interphone device when power is disconnected. An interphone voltage control device(160) is arranged in the terminal device and the base device of the interphone device. The interphone voltage control device controls power which is supplied from the emergency power device to the interphone device. The interphone voltage control device comprises a noise protection circuit.
|
