Maintenance Program - ABB AMA Manual

7.3 Maintenance program

3BFP 000 063 R0101 REV D
Machines for hazardous areas are specially designed to comply with official regulations
concerning the risk of explosion. If improperly used, badly connected, or altered, no matter how
minor, their reliability could be in doubt.
Standards relating to the connection and use of electrical apparatus in hazardous areas must be
taken into consideration, especially national standards for installation (see standards: IEC
60079-14, IEC 6000-17 and IEC 6007-19). Only trained personnel familiar with these standards
should handle this type of apparatus.
Disconnect and lock out before working on the machine or the driven equipment. Ensure that no
explosive atmosphere is present while the work is in progress.
For general safety instructions, see Safety Instructions at the beginning of the manual.
NOTE: The terminals of a machine with frequency converter supply may be energized even
when the machine is at standstill.
This chapter presents a recommended maintenance program for ABB machines. This
maintenance program is of a general nature, and should be considered as a minimum level of
maintenance. Maintenance should be intensified when local conditions are demanding or very
high reliability is required. It should also be noted that even when following this maintenance
program, normal supervision and observation of the machine's condition is required.
Please note that even though the maintenance programs below have been customized to match
the machine, it might contain references to accessories not available on all machines.
The maintenance program is based on four levels of maintenance, which rotate according to
operating hours. The amount of work and down time vary, so that level 1 includes mainly quick
visual inspections and level 4 more demanding measurements and replacements. More
information about the spare part packages suitable for these maintenances can be found in
Chapter 9.2 Spare parts for rotating electrical machines. The recommended maintenance
interval can be seen in Table 7-1 Maintenance intervals. The operation hour recommendation in
this chapter is given as equivalent operating hours (Eq. h), that can be counted by the following
formula:
Equivalent operating hours (Eq. h) = Actual operating hours
Equivalent operating hours (Eq. h) = Actual operating hours + Number of starts x 20
Level 1 (L1)
Level 1 or L1 maintenance consists of visual inspections and light maintenance. The purpose of
this maintenance is to do a quick check whether problems are beginning to develop before they
cause failures and unscheduled maintenance breaks. It gives also suggestions what maintenance
issues must be performed in the next lager overhaul.
The maintenance can be estimated to last approximately 4 - 8 hours, depending on the type and
installation of the machine and the depth of the inspections. Tools for this maintenance include
normal servicing tools i.e. wrenches and screw drives. The preparations consist of opening the
inspection covers. It is recommended that at least the Operational spare part package is available
when commencing this maintenance. The packages are shown in Chapter 9.2.5 Typical
recommended spare parts in different sets.
Manual for High Voltage Process Performance Motors
Maintenance - 47