If it's a three-phase generator, one of the live wires to the load has a ground leak. At this time, the live wire of the phase becomes the neutral wire due to “zero point drift”. the neutral wire becomes charged and becomes the live wire. Processing method: Use a megger to measure the resistance of each phase to ground. The normal resistance value should be greater than 5MΩ. If it is lower than this value, the phase must leak. Find the fault point, reinforce the insulation. and fix it.
Generators are mechanical devices that convert other forms of energy into electrical energy. They are driven by water turbines, steam turbines, diesel engines or other electrical machines to convert water flow, air flow. , combustion of fuel or atomic nuclei The energy produced by fission is converted into mechanical energy and transput into the generator, which is then converted into electrical energy. Generators are widely used in industrial and agricultural production, national defense, science and technology and daily life.
Generators come in many forms, but their operating principles are all based on the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is: using suitable magnetic and conductive materials to form magnetic circuits and circuits that conduct electromagnetic induction among themselves to generate electromagnetic energy and achieve the conversion goal of energy.
Yes, the three-phase load should be distributed as evenly as possible. Reasons for unstable voltage of diesel generator:
1 The generator is overloaded, the calf pulls the cart and large electrical applianceson the load are frequently started, causing large voltage fluctuations.
2 There are faulty factors in the generator itself, such as unstable excitation voltage or poor carbon brush contact. Specifically, you can check the excitation winding and excitation power components, including rectifier diodes, thyristors and other resistors. Capacity components, which are adjustable, also often have poor contact, so care must be taken to maintain them.
3 The diesel engine has unstable speed regulation. It automatically adjusts power output based on load weight. Oil supply and speed stabilization of the high pressure oil pump cause more problems to the diesel engine. must be inspected or maintained.