JXB mechanical hydraulic overspeed protection device I. Overview JXB mechanical hydraulic overspeed protection device is a fusion of the advantages of similar products abroad, combined with the actual situation of hydropower optimization design, independent development of high-tech products. It mainly consists of over-speed detectors, overspeed protection device composed of a large rotating equipment purely passive mechanical overspeed protection device can be used as overspeed protection hydro group. When the hydroelectric generating set speed increases to over-speed protection settings, but this time speed signal device or power station systems and speed control system malfunction, etc., can not achieve the speed and stop hydro group, JXB mechanical hydraulic too speed protection device may utilize hydraulic hydraulic device switching circuit, axial flow through the hydraulic system is shut off, Francis, tubular turbine generator set of vanes agencies or groups to impact hydro, to achieve the unit shut down, prevent runaway accident happened unit, ensure the safe operation of hydro. Second, the technical parameters of Turbine Type: Axial, Francis, Tubular, impact unit spindle diameter range: 100-2000mm rated speed range: 50-1000rpm movement speed range: 70 ~ 1500rpm spindle rotation: Clockwise interface Method: pipe, card sets, flaring interface size: JXB-6 default pipe Φ10 JXB-10 pipe Φ18 default connection mode: card sets of pipe joints or welded fittings Contact Type: passive contact, JXB-6 for a set of SPDT JXB-10 for two SPDT contact capacity: 5A / AC220V 0.5A / DC220V diameter: DN6 DN10 installation distance: δ = 6, with a product that comes with a feeler action error: ≤3%