1. INDUSTRIAL TRAINING
Leela Electric Power Services
Pvt. Ltd., Ernakulam
01-May-2015 to 30-May-2015

2. Plot
• About the company
• Work Flow
• A Case Study
• Gallery
• Conclusion

3. Leela Electric Power Services Pvt. Ltd.
• Consultancy of Power Distribution
• Estimation & Design of Electrical Schematic
• Erection, Testing and Commissioning of
Transformers up to 2000KVA and HV/MV
switchboards

4. Leela Electric Power Services Pvt. Ltd.
• Erection of Control panel and its wiring
• Erection of 2-pole,4-pole and 6-pole receiving
structure and allied works
• End termination of HT cables up to 33KVA

5. WORK FLOW

6. DESIGN
• Starts from load side
• Based on Standards by Electrical Inspectorate
• Fault Level Calculation & Earthing Scheme
• Per Motor Design
– Switch
– Fuse
– Isolation (MCB, MCCB, SFU and MPCB)
– Cable

7. STANDARDS
• Chief Electrical Inspectorate, Govt. Of Kerala
• http://www.cei.kerala.gov.in
• Norms and conditions
• Eg.
– Power Distribution Board
– 3000 W or 2 Points
– Low Voltage Distribution Board
– 800 W or 10 Points

8. EARTHING
• Body Earthing of Equipments
• Earthing Scheme & Grid Formation
• Earthing wire
– Fault level variation according to place of fault
– Copper  Aluminum  Galvanized Iron

9. EARTHING

10. EARTH PLATE
• Copper and GI plates
• 60 cm x 60 cm x 3 mm / 6
mm ( Min. Dimension)
• No. of plates based on
fault level

11. PLATE EARTHING

12. PLATE EARTHING

13. 51G Earth Fault Relay
• Inverse time over
current relay
• Severe fault – Fast
tripping
• Main protection relay
used below 500kVA

14. A2XFY cable
• A – Aluminum
• 2X – XLPE insulation
• F/ Fa – Steel strip armor variations
• W/Ww/Wa – Steel round wire armor
variations
• Y – PVC outer sheath
• C/CE – Metallic screening

16. Basic Architecture of a Control Panel

17. INTERLOCK
• Why interlocking ?
• Methods
– Automatic Mains Failure Relay (AMF)
– Castell Key Mechanism
• Crusher Loads
– The plant never sleeps
– High speed interlock required
– Automatic Transfer Switch (ATS) is used

18. Automatic Transfer Switch
• Monitors Voltage and Frequency
• Fast switching (30 Cycles)
• Synchronization
• Two live lines handling simultaneously

19. Automatic Power Factor Correction
Panel
• Optimize energy
consumption
• Increase the power
availability
– Reduced KVA
requirement
• Reduce harmonic
distortion

20. ISOLATION
EQUIPMENT
ORDER
RATING
MCB Less than 500 A
MCCB 500 to 1 kA
ACB, VCB, SF6 above 1 kA

21. MCCB and MCB
• Difference ?
• 3- Phase 4/6 way TPN MCB DB
• 4/6 ways in each phase
• Percentage tripping
requirement ?

22. TOD Meter
• Time of Use Meter
• Peak and Off Peak Slabs
• Measures
– When Energy is Consumed
– How much Energy is Consumed

23. CASE STUDY
• Avees Food Products, Pulincunnoo, Aleppy
– Washing
– Powdering
– Roasting
– Grading
– Packing
• Load Requirement
– 290.75 HP
– 14.7 kW
– 80 kVAr

24. Glanding

25. Cable Termination Kit

26. CONCLUSION
• HT wiring Design and Standards is familiarized
• Workflow and Procedures are familiarized
• Techniques like cable glanding and
termination are familiarized
• AUTOCADD electrical drawings are familiarized

27. THANK YOU ALL VERY MUCH 