Shenzhen generator rental protection principle automatic air switch: 1), undervoltage protection principle generator output voltage is normal when the load on the power supply, loss of pressure release button TA solenoid coil through the normally closed contacts and automatically switch normally open auxiliary contact head (is closed after closing) connected to line voltage on the power supply side. 2 solenoid coil is energized generator repair prices, generate electromagnetic suction greater than 5 tension spring, shock rod 4 being sucked down, automatic switch in the closing state. Due to loss of pressure release for generator voltage protection device voltage setpoint start tuning in less than 70% the amount of voltage generator, transient episodes, so when the generator output voltage drops to undervoltage protection setpoint When the electromagnetic attraction is less than the spring tension generator repair plant, the impact hit the lift rod hook to hook the lever disengages automatically switch under the action of spring breakers automatically trip. When you need the remote control, press the TA button tripped. 2), overcurrent protection schematics an overcurrent tripping the overcurrent protection device consists of two electromagnets release components. When the generator output current of normal generator maintenance, over-current trip is less than the spring tension suction solenoid, hook and hook the lever hook firmly, automatic switch is closed, the state shown in Figure 1. When the fat overload generator output current is greater than the starting current overload setting value, the solenoid coil suction greater than the spring tension, dynamic street iron absorption, the impact on the lift rod hit the hook to hook lever disengaged, automatic tripping. When the diagnosis of unstable idle, the engine should be based on the length of time and extent of maintenance on the engine to analyze and judge. Low oil ① should first check whether the flow of oil, check _ filling diesel meets the requirements of the automotive engine maintenance is timely, or should be cleaned or serviced, replaced. ② If the car for a long time suspended or not replenish oil tank, a small amount of air into the oil, exhaust treatment should be carried out. ③ If car use has long fuel pump also repeated debugging without viewing the governor wear, pay attention to test speed element when debugging, throttle each connection rod for wear too much of the phenomenon. Otherwise it shall be for parts or welding repair processing. When rotating parts welding repair, should pay attention to the quality of symmetry, to ensure balance. ④ idle instability and accompanied by vibration, is due to the injection pump fuel supply caused by uneven cat generator maintenance, available by law to check off the oil tank. If you break the speed did not cause changes in the cylinder, then the cylinder oil shortage or bad injector atomization. Should first check the fuel injector, and then check the fuel pump. ⑤ If the device is idle stabilization improperly adjusted, should re-test rig maintenance. Generator repair prices, Shatin generator maintenance, the diesel generators supplied by diesel Electrical Equipment Co., Ltd., Dongguan ShangXi. Electrical Equipment Co., Ltd., Dongguan ShangXi Chai (www.dongguanfadianji.cn) strong, credible, diesel generator sets and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the diesel generator and you hand into the brilliant, for a better future!