1. Bushings

2. What does it do? What is a bushing? Used to conduct current
Provide insulation

3. Materials / Types of insulation
Ours
Polymer cycloaliphatic
Dry type
Others
Ceramic/phenolic paper
Oil filled

4. What product do we offer?
Voltage up to 46 kV
Current up to 3000 A
Air/air and Air/oil applications (also other special items)
Can meet IEC or ANSI standards

5. What are the components?
Central conductor
Insulating material
Flange
Capacitance tap
Shield

6. Determined by the customer requirements
Central conductor
Determined by the customer requirements
Type of connectors ends
Size of conductor

7. Cycloaliphatic epoxy resin-based Different formulations
Insulating material
Cycloaliphatic epoxy resin-based
Different formulations
depends of the application
Indoor/outdoor
Mechanical loads
etc...

8. Flange
Corrosion-resistant aluminium
Allows adaptation to all possible designs
Provide mechanical adaptation

9. Shield
Limit the level of electrical field around a Current transformer
Connected to the ground by the flange
Integrated to the insulating material

10. Capacitance tap Allows shield to be disconnect from flange
Allows the measurement of:
Capacitance of the bushing only
Power factor
Delta tangent

11. Bushing applications

12. Example of pole top transformers
Ex : Pole Top Transformer
Bushing
No shields
Draw lead conductor

13. Example of recloser types
Ex : Recloser Bushing
Shield
Solid conductor
Angle conductor

14. Example of recloser

15. Example of breaker types
Ex: GE KSO & Westinghouse BN
Shield
Solid conductor or draw lead

16. Examples of breakers

17. Example of transformer types
Ex : ANSI Bushing, Primary & Secondary
Shield
Solid conductor or draw lead
Capacitance tap

18. Example of transformer

19. Example of turbo generator types
Ex : Synchronous compensator for HQ
Burrard Power Plant for BC Hydro
H2 environment
Subject to vibrations

20. Before / After

21. Synchronous Compensator

22. Installation

23. Example of wall bushing/rooftop types
Air/air bushing
Solid conductor
Shield

24. Key features of our products
Dry type
No oil and no PCB
Can be mounted at any angles
Environmentally friendly

25. Key features of our products
Highly resistant to lightning
Does not explode like porcelain
Increased safety

26. Key features of our products
Non tracking material - perfect for highly polluted areas :
salt fog (coastal and highways)
heavy industrialized areas

27. Key features of our products
Longer creepage distance
Because of higher mechanical properties of composite vs porcelain
Rule of thumb: ECI bushings are lighter and more compact than equivalent porcelain products

28. Key features of our products
Low partial discharge
Because the manufacturing process is void free
Typical value under 2 pC, which translates to increased longevity of the insulation component

29. Key features of our products
Lower cost and better delivery time
Shorter delivery times, generally half the time than for porcelain
Flexible tooling allows for more bushing designs to replace porcelain bushings no longer available
Typically lower cost: as much as 25% less than porcelain

30. Key features of our products
Meet IEC/ANSI standards
Individual test with report
Hipot
Partial discharge
Capacitance

31. Key features of our products
More resistant to damage (gun shot)
Continued operation even if a shed has been damaged
Minimizes equipment shutdown

32. Conclusion Why buy an ECI bushing?
Excellent electrical and mechanical properties
Non tracking, longer creep, low PD
Meet IEC/ANSI standards
Clean
Oil free / PCB
Environmentally friendly
Typically less expensive and faster delivery than porcelain bushings
Generally safer failure mode