1. Basics of Electrical Maintenance
Part – I
Technical & Non-Technical
Mr. Vijay B. Raskar
BE - Electrical / MBA – Operation / Autocad Engineer
vijayraskar2003@yahoo.co.in

2. Story of New Plant
Listen carefully –
There are few questions at the end of the story.

3. Define Electrical Maintenance
 Electrical Maintenance involves the
fault diagnosis, routine servicing, and
repair of electrical components of a
machine.
 An electrical maintenance Engineer is
responsible for planning the maintenance
to ensure the smooth running of
production lines in a company.
 The engineer service, repair and maintain the electrical
components of a plant.

4. Electrical
Maintenance
Preventive
Operational
Corrective
Q. Which one is the best for the Electrical Maintenance ?
Q. Which one is dangerous for Organization point of view?
R. Which one is mostly preferable?
- Why a day reserved for Maintenance purpose ?

5. Preventive Maintenance
The effectiveness of a preventive maintenance
schedule depends on the RCM anylysis which it
was based on, and the ground rules used for costeffectivity.
 Preventive maintenance is maintenance
performed in an attempt to avoid failures,
unnecessary production loss and safety violations.
Reliability Centered Maintenance (RCM) is a
process to ensure that assets continue to do what
their users require in their present operating
context.

6. Electrical Preventive Maintenance
What is the definition of
Electrical Preventive Maintenance?
The scheduled
inspection, testing and maintenance
of critical electrical components!

7. Electrical Preventive Maintenance
Scheduled!!!
1) Start with a plan
2) Depending on the type of maintenance and the
environment the frequency can vary from one to
five years.
3) Be Proactive verses Reactive.

8. Electrical Preventive Maintenance
Inspection, Testing & Maintenance
1) IEEE-- The Institute of Electrical and Electronic
Engineers.
2) NETA --National Electrical Testing Association.
3) Good common sense.

9. Electrical Preventive Maintenance
CRITICAL!!!!
1) No guarantees, reduce your probability of an electrical
crisis or outage.
2) Does it cost you or your company money or
is it just inconvenient.
3) Time period for evaluation, typically one hour.
4) How is the electrical distribution system designed.

10. Electrical Preventive Maintenance
High Voltage verses Low Voltage
Low Voltage- 120 to 600 volt equipment
High Voltage - over 600 volt equipment

11. Electrical Preventive Maintenance
High Voltage verses Low Voltage
1) Different types of testing, contact verses non-contact.
2) Energized cleaning tightening.
3) Critical verses Non-Critical
4) Typically different types of deficiencies.

12. Electrical Preventive Maintenance
Typical Low Voltage Deficiencies
1) Overloading
2) Code violations
3) Loose connections
4) Trash, contamination or storage
5) Harmonics

13. Electrical Preventive Maintenance
Typical High Voltage Deficiencies
1) Corona or tracking
2) Stress cone failure
3) Loose connections
4) Dirt or contamination

14. Electrical Preventive Maintenance
Harmonics
1) Caused by the switching or disruption of the
normal 60 cycle sine wave.
2) Tripling harmonics 3rd, 9th or 15th.
3) Motor rotation.
4) Annoying verses destructive harmonics.

15. Electrical Preventive Maintenance
Infrared Analysis
1) Imaging verses scanning.
2) Measures infrared wave emissions not temperature.
3) Emissivity
4) Is not a cure-all, do not use a screwdriver when
you need a hammer.
5) High voltage verses low voltage.

16. Electrical Preventive Maintenance
Ultrasound Leak Detection
1) Microphone
2) High voltage
3) Pole leads
4) Steam traps
5) Motor bearings

17. Electrical Preventive Maintenance
Transformer Oil Testing
1) Dissolved Gas Analysis
2) Oil Quality Profile
3) PCB Analysis
4) SD Meyers
5) Taking samples
6) Frequency

18. Electrical Preventive Maintenance
Polarization Index Testing
1) Megger Test
2) Capacitance Test
3) Frequency

19. Electrical Operational Maintenance
where equipment is maintained in using.
Operational maintenance is the care and minor
maintenance of equipment using procedures that do not
require detailed technical knowledge of equipment’s or
system’s function and design.
This category of operational maintenance normally consists
of inspecting, cleaning, servicing, preserving, lubricating,
and adjusting, as required.
Such maintenance may also include minor parts
replacement that does not require the person performing the
work to have highly technical skills or to perform internal
alignment.

20. Electrical Operational Maintenance
As the term implies, operational maintenance, is performed by
the operator of the equipment.
Its purpose is threefold:
(1) To make the operator aware of the state of readiness of the
equipment.
(2) To reduce the delays that would occur if a qualified technician
had to be called every time a simple adjustment were needed
and
(3) To release technicians for more complicated work
 Depending on the type of equipment in use, operators may also
be responsible for replacing worn out filters or cartridges, or
removing and replacing a worn belt, cutting tool, or grinding
stone. Operational maintenance may entail keeping machinery
well lubricated to reduce the risk of friction or failure.

21. Electrical Corrective Maintenance
where equipment is maintained after break down.
This maintenance is often most expensive because worn
equipment can damage other parts & cause multiple damages.
Corrective maintenance is the program focused on the
regular task that will maintain all the critical machinery and
the system in optimum operating conditions.
The major objectives of the program are to
1.Eliminating breakdown
2.Eliminating deviation
3.Eliminating unnecessary repairs
4.Optimize all the critical planned system

22. Maintenance Software
Now – a – days number of software are used to control or
maintain the electrical environment.
There are many software's available in the market.
Like CMMS, epix etc