The invention discloses a primary
harmonic elimination device. The
harmonic elimination device comprises a placement cabinet, a wiring plate, a wiring cylinder, a vertical fixed plate, a groove, a horizontal fixed plate, a fixed groove, a fixed block, a fixed bolt, a primary
harmonic elimination device, a clamping block, a clamping bolt, a wiring sheet, a hanging plate, a vertical fixed connectionplate, an electric push rod, an outage push rod, an adjustment plate, an adjustment bolt, an insulation plate, a wiring rod, a rotation shaft, a continuous connection rod, a fan shell, a motor, blades, a door fan and a rotation wiring plate. The primary
harmonic elimination devices in different types and at different sizes can be fixed by a limitation mechanism; since a main body of the limitation mechanism comprises four fixed grooves and clamping blocks, the fixed grooves are arranged in an
annular array way, the clamping blocks are arranged on the fixed grooves, and the primary
harmonic elimination device in a columnar structure can be fixed very well; and meanwhile, fixing of the primary
harmonic elimination devices in different types and at different sizes is completed by matching amovable horizontal fixed plate, and the harmonic elimination device is relatively wide in application range.