Why Diesel Generator Can Start But Cannot Generate Electricity
by Starlight Generator dieselgeneratortechHere
is some reasons for reference:
1.After the diesel
generator is stopped, the residual magnetism is often lost, because the
material used for the magnetic pole of the exciter is close to the soft steel,
and the residual magnetism is small. After the shutdown, when there is no
current in the excitation winding, the magnetic field will disappear.
2.The magnetic pole of
the diesel generator loses its magnetic properties.
3.Damage of excitation
circuit components or circuit breakage, short circuit or grounding phenomena.
4.The exciter brush is
not in good contact with the commutator and pressure of brush holder is
insufficient.
5.Excitation winding
wiring error, opposite polarity.
6.Stator winding and
rotor winding of generator set open circuit.
7.Poor contact between
diesel generator brush and slip ring, or insufficient brush pressure.
8.Diesel generator lead
wire wiring is loose or switch contact is poor.
9.The fuse box is fused.
10.The
"auto-manual-de-excitation" switch on the control panel is in the
de-excitation position (automatic generator set has
"auto-manual-de-excitation" switch).
11.The voltmeter is
damaged.
12.Rotary rectifier
module is damaged.
Methods
of resolution:
1.We can have a battery
and magnetize it before generating electricity.
2.Magnetize in the
winding with a DC current which is greater than the rated current (short time).
3.Replace damaged
components and repair faulty lines.
4.Remove the scale on
the contact surface, adjust the brush pressure, and fasten the brush holder.
5.Correct the wiring and
press the correct polarity to magnetize.
6.Remove the scale on
contact surface, grind the brush, adjust the pressure of the brush, and make
the brush in close contact with the slip ring.
7.Check and repair the
break circuit position.
8.Connect the connector
or repair the switch contact part.
9.Find out the cause of
the fuse, and determine that the generator itself and the line are normal,
replace the specified fuse.
In order to avoid diesel
generators failling to generate electricity, here are some ways to check before
start up the diesel genset:
1.Measure whether there
is real electricity and replace the voltmeter.
2.Put it into automatic
or manual mode.
3.Check and correct
according to circuit diagram.
4.New generators or
long-term unused generators can not easily produce electricity, it can be
magnetized by pressing the charge button on the control panel or by using 12V
battery to magnetize the excitation winding, the positive pole is connected to
F1 and the negative pole is connected to F2. If there still is not electric
pressure, we should adjust positive pole and negative pole, then try
again.
5.Clear collecting ring
surface, sanding the end face of the carbon brush to make the area of the arc
of the collector ring more than 70%, strengthen sparing pressure.
6.Clean carbon brush and
carbon brush grip.
7.Check the diode
forward and reverse resistance with a multimeter, if it is damaged, replace it.
8.Check with a
multimeter, if the forward reverse resistors do not meet the diode
characteristics, we need to replace new forward reverse resistors.
9.For diesel generator
set, check the winding with 1K gear of multimeter, if the resistance value is
infinite, it should be connected. Then check with 1 Ω gear of multimeter, if
the resistance value is zero, we should replace or repair the windings. If the
resistance value is not stable, check if the connector wiring is loose, if it
is loose, need to screw it.
Starlight Volvo diesel
power generators are approved by CE and ISO certificates, its quality is very
good, maybe sometimes we meet it can not produce electricity, for other brands
of diesel generators, they may also have this fault. So this article will be
greater to help you to avoid and resolve the fault.
We are a manufacturer of
diesel generator sets, our factory was set up in 1974, we have focused on high
quality products for more than 40 years, we not only supply diesel generators,
but also provide power solutions and technical supports. Welcome to inquire us
by contacting sales@dieselgeneratortech.com.
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Created on Oct 30th 2019 01:39. Viewed 236 times.