Patent ID: 8269366

Claim:
A handy terminal for a wind turbine generator comprising a tower adapted to stand on land or off-shore, a nacelle supported on the tower to be controlled to rotate in the yaw direction and a plurality of rotatable blades attached to the nacelle to be controlled to move their pitch, wherein the handy terminal is adapted to connect to connecting ends respectively provided on the lower portion of the tower and the nacelle, and is configured to control the wind turbine generator, the handy terminal comprising: a connecting portion for connecting the handy terminal to the connecting ends; an operation button connected to the connecting portion for generating operation signals for various control devices that are incorporated into a control circuit in the wind turbine generator; a display portion for displaying an operating state of the operation button; and a control portion for performing display control of the operation button, wherein the control portion of the operation button makes a mode selecting button to appear that selectively enables a maintenance mode or an operating mode of the wind turbine generator, and makes an operation button to appear that separately controls at least one of: a blade pitch control, a yaw brake control: and an accessory motor provided on an oil circuit to control the blade pitch control and the yaw brake control that are incorporated in the wind turbine generator, correspondingly to a corresponding maintenance operation screen displayed on the display portion when the maintenance mode is selected from the selecting button, wherein the control portion for performing display control of the operation button makes an operating button that separately controls the blade pitch control, the yaw brake control and the accessory motor control to appear or enable that operating button, when the connecting portion is connected to the connecting end provided on the nacelle.