Generally, several wires or terminals of the generator have prescribed markings. After servicing the generator, the generator wiring should be connected correctly according to the brands. Except for one of the lead wires or terminals of the permanent magnet alternator which is a ground wire, the other wires are live wires. When lead wires or generator terminals are not marked, or the markings are unclear, or the meaning of the markings is forgotten, the following methods can be used to identify the ground wires.
(1) Fire test method.
When the generator is operating normally, use a wire to rub against each other. If sparking occurs when a certain wire rubs against the other two wires, then the wire is a ground wire, the other wires are live wires.
(2) Voltmeter measurement method.
When the generator is operating normally,Connect the test lead at one end of the voltmeter to one jumper wire and the other test lead to the other jumper wires, respectively. The voltage between the ground wire and the voltage. The wire is greater than two The tension between the live wires is low. For example,
If the voltage between a certain wire and other wires is around 6 volts, the wire is a ground wire.
If you don't have a voltmeter, you can also use a 12 volt bulb (the voltage is too low and the bulb is easy to burn out) and connect it to the two lead wires and determine the voltage depending on the brightness of the light. When the ground wire and the live wire are connected, the light is darker, and when the two live wires are connected, the light is brighter.
Why is the generator on fire then turns off the fire for a while
The light will not turn on in either case.
Because theamp does not form a current loop. The neutral point of the generator winding is not connected to ground. The live wire from the generator passes through the lamp to the neutral wire of the transformer and cannot return to the neutral point of the generator winding.
Typically, the generator produces three-phase wires and a neutral wire. Send it to the electrical distribution panel and connect it to the busbar. At this time, the neutral line of the generator is connected to the neutral line of the transformer and grounded, and then delivered to the load. ?
Edit: Take a closer look to see if the generator output neutral line is truly isolated from the transformer neutral line or ground. Using a single live wire from the generator will definitely not form a loop. Is there an electrical device or instrument that conducts the neutral wire of the transformer to the neutral wire of the generator?
What the person above saidit is false. The meter that steals electricity must always be connected to the neutral wire. Simply connect the meter's live wire and find another ground wire as neutral. thread. The counter will always run. Unless the meter is connected to the neutral wire, the meter will not spin.
The generator will put out the fire if it catches fire. The reason is that the fuel injection pump piston, which is the housing of the high pressure oil pump, has worn badly over time and will shut down if the pressure is not achieved. When the car is idling at high speed and the engine speed is high, the fire will not be extinguished. At low idle speed, the engine speed is slow, the piston pressure in the fuel injection pump cannot reach the injection pressure, and the fuel injector cannot atomize the diesel, so it stalls.
There are 6 sets of injectors on the engine cylinder head. Due to the high pressure of the new oil pump and piston, the factory pressure is generally adjusted to around 220. However, when the engine runs for a long time, the piston pressure gradually decreases and the pressure of the assembly injector strength will stay around 220. At this point you either need to adjust the injector pressure or replace the injector piston. It is suggested to take the high pressure fuel pump and fuel injectors to a professional fuel pump expert for calibration.
Other reasons:
1. The extinguisher switch is not turned on and the extinguisher wire is shorted. Lack of oil.
2. Sensor: Disconnect the oil sensor cable and the gasoline engine can start the oil change sensor.
3. Ignition System Problems: Disconnect the spark plug to start and observe the condition of the spark. White and red sparks are nnormals; If there is no spark, replace the spark plug or igniter.
4. Fuel system problems: Check to see if water has entered the fuel. If water has entered, clean the carburetor with gasoline. Determine whether the cylinder block is full of fuel, disconnect the spark plug, press the air filter hole firmly with your fingers, start it at idle several times, and smell the fuel smell with your fingers. Determine if the oil supply channel is leaking and change the position of the air damper to see if it can start.
5. Power conversion system and gas distribution system problems: Disconnect the spark plug and press the air filter hole firmly with your fingers. If no compressed gas escapes after idling several times, there is a problem with the power conversion system and gas distribution system.
One million grantscar buying tips