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specific maintenance procedures and tests required for rotating electrical
machines.
For general safety instructions, see
Chapter 1.5. General Safety
and
Chapter
1.6. Safety Instructions
.
7.3 Maintenance program
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.
NOTE: Different types of the generators contain different items to be
maintained. Maintenance program described in this chapter contains
references to the accessories that are not available on all machines.
Operator shall create suitable maintenance program based on basis of
this information.
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 this type of maintenance can be found in
Chapter 9.2. Spare parts
.
The recommended maintenance interval can be seen in
Table 7-1. Recommended
maintenance program
. The operation hour recommendation
T
in this chapter is
given as equivalent operating hours,
T(Eq. h)
. That can be counted by the
following formula:
T(Eq. h)=
actual operating hours
+
number of starts x 20.
Table 7-1. Recommended maintenance program.
Interval/[T]:
L1
L2
L3
L4
4 000
X
8 000
X
12 000
X
16 000
X
20 000
X
24 000
X
28 000
X
32 000
X
36 000
X
40 000
X
44 000
X
48 000
X
52 000
X
56 000
X
60 000
X
64 000
X
68 000
X
72 000
X
76 000
X
80 000
X
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
