Maintenance Plan - WEG GPW Series Installation, Operation And Maintenance Manual

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8 MAINTENANCE PLAN

The maintenance plan detailed in Table 8.1 is referential, considering that the intervals between each maintenance
intervention may vary according to the alternator location and operation conditions. For associated equipment, such as the
voltage regulator and control / protection panel, the specific manuals must also be consulted.

Whole alternator

Whole alternator

Bearings

Protection and control equipment

Air-water heat exchanger

Air filter (if any)

Whole alternator

1
Bearings

Exciter

Electrical connections

Grounding

Whole alternator

Rotor, stator and exciter

1
Bearings

Air-water heat exchanger

Protection and control equipment

Connection boxes and grounding

Coupling

Filter (if any)

Whole alternator

Rotor, stator and exciter windings

Rotor

Bearings 1,2

Protection, monitoring and control
equipment

Air-water heat exchanger
1. Check the lubrication intervals and amount of grease in the bearing nameplate and technical documentation.
2. The bearing replace must be carried out according to the lifetime reported in the alternator technical documentation.
NOTE
The checks and tasks described in the table above must be performed according to item 6 of this manual.
34 l Installation, operation and maintenance manual
Table 8.1: Maintenance plan
DAILY

Inspect noise, vibration, bearing and winding temperature
MONTHLY

Measure noise, vibration, bearing and winding temperature

Verify winding insulation resistance

Inspect cooling system – air and water flow

Inspect the bearings visually

Verify the operation

Record the measurement values

Monitor the excitation current, making sure that is according to the value informed in the
alternator data sheet.

Inspect the sacrificial anodes (when use sea water)

Inspect and, if necessary, clean or change it
EACH 6 MONTH

Verify and retighten the alternator fixation screws

Inspect and, if necessary, clean the alternator internally and externally

Inspect and, if necessary, relubricate the bearings

Inspect and, if necessary, clean the exciter compartment

Inspect diodes and varistors

Retighten the electrical connection terminals

Inspect the electrical connections of the voltage regulator

Inspect the accessories electrical connections

Inspect and retighten the grounding connections

Inspect the shaft grounding brush and replace it, if necessary
YEARLY (FULL INSPECTION)

Visual inspection

Thorough cleaning of the alternator

Visual inspection, cleaning, verify terminals, measure insulation resistance

Inspect the lubricant quality and relubricate when necessary

Inspect the coolers,

Inspect the sacrificial anodes (if any)

Inspect and, if necessary, change the gaskets of the heat exchanger heads

Inspect the connections

Test the operation

Inspect and clean the inner of the connection boxes

retighten the screws and grounding connections

Inspect the alignment and retighten the coupling screws

Inspect and, if necessary, clean or replace
EVERY 3 YEARS (TOTAL REVISION)

Alternator whole inspection

Verify parts and components

Clean the windings

Inspect windings and check the fastening of the wedges on slots

Inspect the winding electrical connections

Inspect the shaft (wear, fouling)

Clean the bearings and, if necessary, replace them

Inspect shaft seat and, if necessary, restore

Test the operation

Clean the coolers