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| SF6 Power Circuit Breaker |
Below is an example of specifications of a Power Circuit Breaker, using SF6 as its arc quenching medium. You may make this as a reference, taking into consideration your own requirements. Take note that this sample has Bushing Current Transformers (BCT) on it.
POWER CIRCUIT BREAKERS
Use: 69KV Transformer Breaker
Item # Description Specification
1. Manufacturer Depends on your standards
2. Nominal Voltage (volts) 69,000
3. Breaker Type Type SPS2-72.5-40-2
4. Construction Dead tank
5. Maximum Voltage (volts) 72,500
6. Year manufactured
7. Quantity
8. Interrupting Medium SF6
9. Rated Voltage Range Factor (K) 1.0
10. Continuous Current 1,200
11. Frequency (Hz) 60
12. Low Frequency Withstand
Dry 60 Hz for 1 min.
Wet 60 Hz for 10 sec. 160 kV
Full wave withstand (BIL) 350 kV
13. Interrupting time ( cycles) 3 cycles
14. Permissible tripping delay Y (sec) 2 sec.
15. Closing time (cycles) 12
16. Reclosing time (sec)
17. Short circuit interrupting current
kA, RMS, Symmetrical 40
kA, RMS, Asymmetrical 48
18. Close & latch (Initial current loop) kA, RMS, Assymmetrical 64
19. Close & latch (kA Peak) 108
20. Short time current (3 sec.) kA, RMS, Symmetrical 40
21. Transient recovery voltage (kV peak)
22. Load current switching capability (amperes) 2,000
23. Transient inrush current (kA peak) 25 kA
24. Transient inrush frequency(Hz) 3,360 Hz
OPERATING MECHANISM
25. Closing circuit power supply (Vdc) 48 Vdc
26. Closing circuit protection breaker
27. Tripping circuit power supply (Vdc) 48 Vdc
28. Tripping circuit protection breaker
29. Type of breaker control spring charge
30. Breaker control power supply (Vac) 48 Vdc
31. Breaker control protection breaker
CIRCUIT BREAKER ACCESSORIES
32. Current Transformer Mounting Line & load side
33. Quantity Load Side 6.0
34. Quantity Line Side 6.0
35. Terminal Connection flat pad
36. Lifting hook provided yes
37. Number of Auxiliary Contact 20.0
38. OTHER ACCESSORIES
dual trip coils
230 VAC cabinet light and convenience outlet
local / remote switch
breaker protection for control circuits including the ff:
4 hole NEMA bushing terminals and conectors
galvanized steel frame
SF6 gas first filling in cylinder
adapter fitting for SF6 filling
service hose for SF6 filling and timer mounting bracket
BUSHING CURRENT TRANSFORMER
39. Type: Bushing Type Bushing Type Bushing Type Bushing Type
40. Quantity 3 3 3 3
41. Bushing Transformer Mounting: Load Side Load Side Line Side Line Side
42. Accuracy Class: C 800/0.3B1.8 C 400 C 400 C 400
43. Basic Insulation Level (kV): 110kV 110kV 110kV 110kV
44. Frequency (Hz) : 60 60 60 60
45. Burden: 45 VA @ 5A (B1.8) 100VA @ 5A (B-4) 100VA @ 5A (B-4) 100VA @ 5A (B-4)
46. Rated Primary to Secondary Current Ratio(s) 1,200:5 1,200:5 1,200:5 1,200:5
47. Secondary Winding Config. Multi-tap Multi-tap Multi-tap Multi-tap
100:5 X2-X3 100:5 X2-X3 100:5 X2-X3 100:5 X2-X3
200:5 X1-X2 200:5 X1-X2 200:5 X1-X2 200:5 X1-X2
300:5 X1-X3 300:5 X1-X3 300:5 X1-X3 300:5 X1-X3
400:5 X4-X5 400:5 X4-X5 400:5 X4-X5 400:5 X4-X5
500:5 X3-X4 500:5 X3-X4 500:5 X3-X4 500:5 X3-X4
600:5 X2-X4 600:5 X2-X4 600:5 X2-X4 600:5 X2-X4
800:5 X1-X4 800:5 X1-X4 800:5 X1-X4 800:5 X1-X4
900:5 X3-X5 900:5 X3-X5 900:5 X3-X5 900:5 X3-X5
1000:5 X2-X5 1000:5 X2-X5 1000:5 X2-X5 1000:5 X2-X5
1200:5 X1-X5 1200:5 X1-X5 1200:5 X1-X5 1200:5 X1-X5
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