NOVELTY - The cage (9) has a working plane (10) e.g. planar section, provided with a fixed plane and a movable plane. A recession is provided in an edge of the working plane. The movable plane defines the recession. The movable plane is movable in a direction of the fixed plane of the working plane with respect to the fixed plane for enabling shape and dimensions of the recession to be changed, where the shape of the movable plane resembles a circular sector. The recession is defined by curved surfaces. The movable plane is connected by a rotary joint to the cage.    USE - Man cage for use in a personnel hoist that is utilized for repairing and servicing a wind power plant.    ADVANTAGE - The cage comprises turning actuators enabling the movable plane to be moved with respect to the fixed plane, without extra arrangements, so that the turning actuators are simple, reliable and inexpensive. The recession is provided with a protection member that can be a soft or easily moldable member, so as to reduce dents, scratches and other damages of the tube when positioning the cage. The protection member is made of an elastic material by culling off a long piece of an elastic hose so as to easily use a hose for making the protection members differing in length, and place the protection members at edge of the working plane. The cafe is provided with connecting members with quick-release members for detaching the cage from a boom and fastening the cage without tools, so that the cage is easy and quick to fasten to the boom so as to improve versatility of the hoist. The cage is provided with railings that penetrate one another when the movable plane is moved away from the recession, so that the telescopic railing structure needs little space to store, and is strong and durable to use. The geometry of the recession provided in the working plane is changed according to the geometry of a rotor blade so as to enable access to the immediate vicinity of the rotor blade, thus enabling repair of damage in the rotor blade in an easy and safe manner.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a personnel hoist comprising a movable carrier    (2) a method for using a man cage.    DESCRIPTION OF DRAWING(S) - The drawing shows a top view of a man cage, where a protection member is provided in an outer edge.    Man cage (9)    Working plane (10)    Control device (22)    Control unit (24)    Pressure source (25)