Changes of AC Drives (Medium voltage)
Recommendation of preventive maintenance
Equipment maintenance can be divided into breakdown maintenance and preventive maintenance. 
 Breakdown maintenance repairs the equipment after a failure occurs while preventive maintenance prevents failures from occurring beforehand through planned checks and parts replacement. 
 Preventive maintenance is required for the stable operation of equipment. 
Benefits of preventive maintenance
- ● Reduces failure rate
 - ● Maintains reliability
 - ● Maintains performance and functions
 - ● Maintains safety
 - ● Extends equipment life
 
 
Perform preventive maintenance
1. Create a long-term maintenance plan 
Inspection plan, parts replacement plan and plan of Upgrade timing 
2. Perform an inspection
 Perform patrol inspection, regular inspection and detailed inspection 
3. Replace parts
 Replace life-limited parts and replace wear-consumable parts 
4. Perform diagnosis
 Equipment environment, physical degradation, social lifespan, spares management and maintenance history 








