Feng an electrical and mechanical teach you "AC generator installation inspection steps"
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When installing the generator, make sure that the cooling air inlet is unobstructed and avoid the hot air coming back into the generator. If the ventilation cover is provided with a shutter, the window should be lowered to meet the requirements of the protection level. The mechanical coupling of single bearing generator should pay special attention to the air gap between stator and rotor.
The alternator is connected with the diesel generator, which requires the parallelism and concentricity of the coupling is less than 0.05mm. The actual use of the requirements can be slightly more, about 0.1mm, too large to affect the normal operation of the bearing, resulting in damage, coupled with a good positioning pin fixed. The coupling condition should be measured before installation.
There are U, V, W, N mark on the terminal of the generator outlet box, which does not mean that the actual phase sequence depends on the rotation direction. The certificate is printed on the UVW to indicate the actual phase sequence when clockwise rotation, VUW means that when the counter clockwise rotation of the actual phase sequence.
Sliding bearing generator in generator coupling, the height of the center to adjust your engine center slightly, so that the diesel engine flywheel weight will not transfer to the generator bearing, or generator bearing additional bear the weight of the flywheel, is not conducive to the formation of sliding bearing oil film causes fever, even burning of bearings. This type of generator coupling can not take any heavy.
If the neutral point of each generator in the power supply system is connected with each other, or the neutral point of the generator is connected with the transformer and the load neutral point, the neutral line current in the neutral line will be 3 times as high as that of the neutral line. Therefore, it is necessary to determine the central line current of the generator under various load conditions. In order not to overheat the generator, the line current shall not exceed 50% of the rated current of the generator. Midline power is too large, the central line should be installed in the middle of the reactor to limit.
According to the principle diagram or wiring diagram, select the appropriate power cable with copper, copper joints and joint connection, bus, bus and bus locking, the joint local gap is not greater than 0.05mm, the distance between the wires is less than 10mm, also need to install the necessary grounding wire.
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