HPA - BREAKER
1.1
Data
* Rated voltage
kV
12
24
36
* Rated current
A
1250, 1600, 1250, 2000, 1250,
2000, 2500, 2500
1600,
3000
2000
* Rated breaking current
kA
40
26.3
26.3
* Rated making current (peak)
kA
100
66
66
¨
Short time rated current, 1/3 sec
kA
40
26.3
26.3
¨
Sf pressure, (over pressure)
bar
2.5
2.5
2.5
6
¨
Electrical endurance,
(number of
interruptions at rated breaking current)
No
6
25
10
¨
Mechanical endurance
(number of
interruptions at rated current)
No
10000
10000
5000
With maintenance as detailed in this manual.
2.2
Construction and function
The circuit breaker type HPA operator on the puffer principle.
2.2.1 Breaker poles
The breaker pole contains Sf gas (sulphur hexafluoride). This gas in many
6
respects is one of the best media for circuit breaker in use for several decades
and its excellent performance is demonstrated by experience.
(3)
Fig - 1
Structure of SF molecule
6
Summary of Contents for HPA 12kV
Page 7: ...Fig 3b HPA breaker pole for 36 kV ...
Page 9: ... 7 Fig 5 Circuit Breaker ...
Page 13: ...Fig 7A Maintenance schedule for frequently operated breaker type HPA 1VYN400290 005 11 ...
Page 14: ...Fig 7B Maintenance schedule for frequently operated breaker type HPA 1VYN400290 005 12 ...
Page 15: ...Electrical endurance HPA 13 ...
Page 29: ......
