The invention relates to a test bench for testing wind turbine equipment. The plasma limiter includes a signal substrate and a trigger substrate defining a hermetically sealed cavity therebetween in which is encapsulated an ionizable gas. According to the wireless communication apparatus, the wireless communication system adopting the same and the communication method thereof, a suitable transmission rate is assigned to the slave device, not uniformly, but according to the need of the slave device, so that assigning of an excessive or insufficient transmission rate can be prevented. There are one or more drives for directly or indirectly oscillating the gyro member about the drive axis, and one or more gyro output sensors that detect oscillation of the gyro member about the output axis.