ETA MELCO Engineering Co. Pvt. Ltd. Offers High Speed Passenger Elevator for High Rise Building. ETA MELCO Engineering Co. Pvt. Ltd. Supplies escalators. High Speed Passenger Elevator for High Rise Building integrates digital control circuitry into a high-accumulation LSI results in added performance and reliability. High Speed Passenger Elevator for High Rise Building is also available with VVVF inverter drive control system to ensure doors open and close smoothly and quietly. Auto Tuning provides just the right door opening and closing speed at each floor for safety and reliability. In addition, the learning-capable door load detector of this elevator offers high-precision door sensitivity, monitoring changes at each floor to allow prompt door-motion return when abnormal pressure is applied.