QGD-100 Pantograph is raised and lowered under the interaction of DC 24V or 110V linear actuator and metal spring. It uses reliable hydraulic dampers and linear actuator and has strong transverse rigidity, is light and easy to maintain. In emergencies, it can be raised and lowered manually. With a mechanical hook at the lowering position, an unexpected rising of the pantograph can be avoided to protect the maintenance personals on the roof of vehicles.