ABB DC Machines DMI, Инструкция по эксплуатации и техническому обслуживанию

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1
Commissioning
Checks before
start-up
Before starting the motor, check that:
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the armature turns freely and no scraping
noise can be heard.
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the couplings and other mechanical
components are properly tightened.
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the cooling air inlet is located according to
the rating plate.
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the fans rotate in the correct direction.
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the cooling air has free access into and out
of the motor.
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the air inlet and outlet are at opposite ends
of the machine (if the air inlet is at the N-end
then the air outlet must be at D-end, or if the
air inlet is at the D-end then the outlet must
be at the N-end).
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all brushes, including the grounding brush
(if ordered), are in position. The spring-load-
ed pressure fingers are snapped against the
brushes and the brushes can move freely in
their pockets.
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the commutator surface has been cleaned
(if it has been exposed to corrosive gases
during storage). See the chapter “Commuta-
tor”.
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the electrical connections are tight and are
in accordance with the terminal diagram.
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the protective equipment as well as other
monitoring equipment are functioning
properly.
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the insulation resistance has been measured
and approved. See the chapter “Insulation
resistance”.
Checks during
start-up
Check the following points during the start-up:
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that the bearings are filled with grease. See
the chapter “Lubrication”.
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that the bearing temperatures show normal
values after a few hours of running. At an
ambient temperature of 20 °C the values
should be below 80 °C (measured on the
outer bearing cover).
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that no unusual bearing noise is heard.
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that all instruments show normal readings.
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the control system of the thyristor converter.
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the shape and form of the current response.
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the commutation of the machine.
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that the vibration level does not exceed 4.5
mm/s r.m.s.
WARNING
If one of the covers close to the cooling air inlet is to be opened for motor inspection while the machine is
running, observe the following:
– If the machine is equipped with a built-on fan, the air intake to the fan must be sealed off (to avoid
overheating of the fan motor).
– From the time the cover has been opened, or the fan intake has been sealed off, a maximum of three
minutes is available for inspection.
Lubrication dur-
ing start-up
Caution
Immediately after start-up of a newly-installed machine or of a machine which has been standing for a
long period, new grease must be pressed into the bearings. Follow the lubricating instructions on the rat-
ing plate and in chapter “Lubrication”.
Checks after
100 operating
hours
After 100 operating hours inspect the commuta-
tor and the brushes while the machine is at rest.
The surface of the commutator should show a
homogeneous film (patina). The brush contact surface should be homogeneous without patchy
discolouring.
If the results of the inspection are not satis-
factory, ABB should be consulted.
WARNING
Don’t seal air ducts to the motor with products containing silicone, as silicone oil particles will adhere to
the surface of the commutator and cause high brush wear.
Caution
It is advisable to contact ABB if there are any abnormal observations