Abstract: Test rig for a back-to-back test of a turbine, including an axle supported in at least one bearing fixed to a carrier, a gear coupled to the axle and a motor coupled to the gear, whereby a gear bearing arrangement comprising two radially extending arms to be coupled to the gear and extending in opposite directions, which arms are pivotally connected to a pair of torque arms extending in a basically parallel direction, with the ends of the torque arms being pivotally coupled to a frame including lateral extensions extending in opposite directions with connection segments, to which segments respective second torque arms arranged in a basically vertical direction in respect to the pair of torque arms are pivotally connected, which second torque arms are pivotally connected to a respective connection element arranged at the carrier.

Abstract: Test rig for a back-to-back test of a turbine, including an axle supported in at least one bearing fixed to a carrier, a gear coupled to the axle and a motor coupled to the gear, whereby a gear bearing arrangement comprising two radially extending arms to be coupled to the gear and extending in opposite directions, which arms are pivotally connected to a pair of torque arms extending in a basically parallel direction, with the ends of the torque arms being pivotally coupled to a frame including lateral extensions extending in opposite directions with connection segments, to which segments respective second torque arms arranged in a basically vertical direction in respect to the pair of torque arms are pivotally connected, which second torque arms are pivotally connected to a respective connection element arranged at the carrier.

Abstract: A test rig for testing a component in a wind turbine is proposed. The test rig has an adjustable radial weight arrangement mounted on a rotatable shaft; a driving means for rotating the shaft at a shaft rotational velocity; and an adjusting means for adjusting the centre of mass of the adjustable radial weight arrangement relative to the shaft while the shaft is rotating. A wind turbine test setup for testing components of a wind turbine has a test rig mounted to a component such that centrifugal forces generated by the rotating radial weights during operation of the test rig are transferred as lateral forces to the wind turbine component under test.