Chapter 7 Maintenance; Preventive Maintenance; Safety Precautions - ABB AMA Manual

Manual for High Voltage Process Performance Motors

Chapter 7 Maintenance

7.1 Preventive maintenance

7.2 Safety precautions

46 - Maintenance
A rotating electrical machine often forms an important part of a larger installation and if it is
supervised and maintained properly, it will be reliable in operation and guarantee a normal
lifetime.
The purpose of maintenance is therefore to:
• Secure that the machine will function reliably without any unforeseen actions or
interventions
• Estimate and plan service actions in order to minimize down time.
The difference between supervision and maintenance is rather diffuse. Normal supervision of
operation and maintenance includes logging of operating data such as load, temperatures,
vibrations, as well as verification of the lubrication, and measurement of the insulation
resistances.
After commissioning or maintenance, the supervision should be intensive. Temperature of
bearings and windings, load, current, cooling, lubrication and vibration shall be checked
frequently.
This chapter presents recommendations regarding maintenance program, and work instructions
how to conduct common maintenance tasks. These instructions and recommendations should be
read carefully and be used as a basis when planning the maintenance program. Note that the
maintenance recommendations presented in this chapter represent a minimum level of
maintenance. By intensifying maintenance and supervision activities, the reliability of the
machine and the long-term availability will increase.
The data obtained during supervision and maintenance is useful for estimating and planning
additional service. In case some of this data indicates something out of the ordinary, the trouble
shooting guides in Chapter 8 Trouble Shooting, will aid in locating the reason for the trouble.
ABB recommends the use of experts in the creating maintenance programs, as well as in
performing the actual maintenance and possible trouble shooting. The ABB After Sales
organization is happy to assist in these issues. The ABB After Sales contact information can be
found in Chapter 9.1.5 After Sales contact information.
An essential part of the preventative maintenance is to have a selection of suitable spare parts
available. The best way to have access to critical spare parts is to keep them on stock. Ready-
made spare part packages can be obtained from the ABB After Sales, see Chapter 9.1.2 Spare
Parts.
Before working on any electrical equipment, general electrical safety precautions are to be taken
into account, and local regulations are to be respected in order to prevent personnel injury. This
should be made according to instructions of the security personnel.
Personnel performing maintenance on electrical equipment and installations must be highly
qualified. The personnel must be trained in, and familiar with, the specific maintenance
procedures and tests required for rotating electrical machines.
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