6
Rated voltage kV 12 17.5
Rated frequency Hz 50/60 50/60
Rated lightning impulse withstand voltage kV 75 95
Rated power frequency withstand voltage kV 28 38
Rate of rise of transient recovery voltage kV/μs 0.34 0.42
Peak of transient recovery voltage kV 20.6 30
Rated operating sequence O-3 min-CO-3 min-CO
Rated operating sequence with auto-reclosing O-0.3 s-CO-3 min-CO
Guideline values for function times at the rated supply voltage:
Closing time approx. 60 ms
Opening time ≤ 45 ms
1)
Arcing time (at 50 Hz) ≤ 15 ms
Break time ≤ 60 ms
2)
Minimum command time on closing 20 ms
5)
(120 ms
3)
)
5)
Minimum command time on opening 20 ms
4)
( 80 ms
3) 5)
)
2 Technical data
2.1 Technical data Circuit-breakers
Breaker Rated Rated Rated Short-circuit Rated Rated Poles Weight
7)
Permissible number of
type votage current short-circuit breaking short-circuit short- centres vacuum interrupter
breaking current making circuit switching operations
current asymmet- current duration figure 2/3
symmetrical
6)
rical
6)
(peak)
6)
VD4.. kV A kA kA kA s mm c. kg Page 8 and 9
1231-25 12 3150 25 27.3 63 3 275 260 Diagram B
1240-25
8)
4000 275 260 Diagram B
1231-31 3150 31.5 34.3 80 3 275 260 Diagram C
1240-31
8)
4000 275 260 Diagram C
1231-40
9)
3150 40 43.6 100 3 275 260 Diagram D
1240-40
8)9)
4000 275 260 Diagram D
1212-50 1250 50 54.4 125
10)
3 210/275 147/155 Diagram E
1216-50 1600 210/275 147/155 Diagram E
1220-50 2000 210/275 147/155 Diagram E
1225-50 2500 275 159 Diagram E
1231-50 3150 275 260 Diagram E
1240-50
8)
4000 275 260 Diagram E
1212-63 1250 63 65.5 158 3 275 265 Diagram F
1216-63 1600 275 265 Diagram F
1220-63 2000 275 265 Diagram F
1225-63 2500 275 265 Diagram F
1231-63 3150 275 265 Diagram F
1240-63
8)
4000 275 265 Diagram F
1731-20 17.5 3150 20 21.8 50 3 275 260 Diagram A
1740-20
8)
4000 275 260 Diagram A
1731-25 3150 25 27.3 63 3 275 260 Diagram B
1740-25
8)
4000 275 260 Diagram B
1731-31 3150 31.5 34.3 80 3 275 260 Diagram C
1740-31
8)
4000 275 260 Diagram C
1712-40 1250 40 43.6 100 3 210/275 147/155 Diagram D
1716-40 1600 275 155 Diagram D
1720-40 2000 275 155 Diagram D
1725-40 2500 275 159 Diagram D
1731-40 3150 275 260 Diagram D
1740-40
8)
4000 275 260 Diagram D
1)
75…100 ms for generator breakers
2)
90…115 ms for generator breakers
3)
If the activating relay contact cannot itself interrupt the release
coil current
4)
60 ms for generator breakers
5)
120 ms for generator breakers
6)
When the operating voltage is lower than the rated voltage, the same
values apply as for rated voltage. Higher values on request.
7)
Individual unit (without chassis) with motor-operated mechanism
and basic release equipment.
8)
4000 A with fan cooling only
9)
Available in a special version as a generator breaker.
10)
135 kA possible
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