Appendix
Item Unit 15.5 kV 27.6 kV 38.0 kV
Lightning impulse withstand voltage
Full wave 1.2/50 µs
Chopped wave 2 µs
1
Full wave 1.2/50 µs
kV
110
142
----
150
194
----
200
258
----
Power-frequency withstand voltage kV 50 60 80
Rated short-circuit current kA 20/25/31.5/40 20/25 20/25/31.5/40
%dc component % 48 48 48
Rated making closing and latching current kA 52/65/82/104 52/65 52/65/82/104
Rated duty cycle
Reclosing duty
Non-reclosing duty
---- O-0.3 s-CO-3 min.-CO
O-15 s-CO
O-0.3 s-CO-3 min.-CO
O-15 s-CO
O-0.3 s-CO-3 min.-CO
O-15 s-CO
Minimum reclosing time
2
s 0.3 0.3 0.3
Rated power frequency Hz 60 60 60
Capacitance switching
Overhead line
Isolated bank
Back-to-back
A
100
400
400
100
400
400
100
250
250
Phase spacing (bushing center-to-center)
1,200 A
2,000 A
3,000 A
inches (mm)
13.0 (330)
13.0 (330) (31.5/40 kA)
15.7 (400)
15.7 (400)
15.7 (400)
-----
15.7 (400)
15.7 (400)
-----
External creep inches (mm) 23.6 (600) 24.5 (620) 41.0 (1,040)
External strike-to-ground Inches (mm) 10 (255) 10 (255) 17 (480)
Operating temperature range
Standard
Special
°C -30 to +40
-40 to +40
-30 to +40
-40 to +40
-30 to +40
-40 to +40
Operating mechanism ---- Stored-energy Stored-energy Stored-energy
Closing time ms ≤80 ≤80 ≤80
Opening time by interrupting time five-cycle
standard
ms ≤42 ≤42 ≤42
Dual trip coils (mechanically and electrically
independent)
---- Optional Optional Optional
Emergency manual trip (externally
operable)
---- Standard Standard Standard
Auxiliary voltages (options)
Close, trip and protection
Space heaters, auxiliaries
Vdc
Vac
Vac
48/125/250
120/240
3
120/240
48/125/250
120/240
3
120/240
48/125/250
120/240
3
120/240
Interrupting medium ---- Vacuum Vacuum Vacuum
Breaks per pole ---- 1 1 1
Contact gap
1,200 A
2,000 A
3,000 A
mm
15-16
9
9
15-16
15-16
----
19-21
19-21
----
Radio influence voltage (RIV) 1,000 kHz V ≤500 ≤650 ≤650
Seismic withstand (optional) (ANSI/IEEE
693-2005 high-response spectrum)
g 0.5 0.5 0.5
Table 14: Technical ratings
Footnotes:
1
Circuit breaker in CLOSE position.
2
User must supply external time delay (typically using setting in reclosing relay) to assure the minimum reclose time interval of 0.3 s in accordance with ANSI/IEEE
C37.06.
3
For ac tripping supply, capacitor trip is used. If ac trip without capacitor trip is used, the ac supply must be from a highly reliable power source (for example, from
an uninterruptible power supply).
40
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