| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric actuator capable of managing properly with a valve of which a high output is required such as a large-bore valve without enlarging the capacity of components for electric fitting. SOLUTION: The electric actuator has a drive circuit 26 to operate an electric motor 5 by feeding the current from a DC power supply 22, and is arranged so that a relay circuit 29 can be installed if necessary complying with the current feeding capacity, wherein the relay circuit 29 is composed of a relay 27 fed with current through a microswitch turned on and off according to the valve condition, fully opened or fully closed, and normally open contacts 28 to turn on the current feed to the motor 5 from the DC power supply 22 by feeding the current to the relay 27. COPYRIGHT: (C)2009,JPO&INPIT
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