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Table 10: Technical ratings
Rated
maximum
Circuit
Lightning
voltage
breaker
impulse
type SDV7
kV, rms
15.5-20
15.5
110/142
15.5-25
15.5
110/142
15.5-31.5
15.5
110/142
15.5-40
15.5
110/142
27.6-20
27.6
150/194
27.6-25
27.6
150/194
38.0-20
38.0
200/258
38.0-25
38.0
200/258
38.0-31.5
38.0
200/258
38.0-40
38.0
200/258
48
Appendix
Rated withstand
Rated
voltages
short-
circuit and
Power
short-time
frequency
current
(BIL)
kV
kV
kA, rms
3
50
20
50
25
50
31.5
50
40
60
20
60
25
80
20
80
25
80
31.5
80
40
Footnotes:
Standard 50 ms (3-cycle) with 48 Vdc, 125 Vdc or
1
250 Vdc trip voltage or capacitor trip with 83 ms
(5-cycle) interrupting time optional (for stored-
energy only).
TRV values are in accord with IEEE C37.06-2009.
2
TRV peak value u
is roughly equal to historic E
c
value in ANSI C37.06-2000. Value t
voltage u
, is approximately 1/1.138 times the T
c
value in ANSI C37.06-2000.
First value is full-wave impulse withstand circuit
3
breaker open or closed. Second value is chopped-
wave impulse withstand, applicable only with
circuit breaker closed.
Rated
Rated
interrupting
continuous
time
current
1
ms/cycles
A, rms
1,200,
50/3
2,000
1,200,
50/3
2,000
1,200,
50/3
2,000,
3,000
1,200,
50/3
2,000,
3,000
1,200,
50/3
2,000
1,200,
50/3
2,000
1,200,
50/3
2,000
1,200,
50/3
2,000
1,200,
50/3
2,000,
2,500
1,200,
50/3
2,000,
2,500
2
, time to
3
2
Rated transient
Rated
recovery voltage
2
permissible
tripping
u
TRV
t
time to
c
3
delay time
peak
voltage
Y
value
u
c
kV
μs
sec
29.2
32
2
29.2
32
2
29.2
32
2
29.2
32
2
52.1
45
2
52.1
45
2
71.7
59
2
71.7
59
2
71.7
59
2
71.7
59
2
Rated
closing
and
latching
current
kA, peak
52
65
82
104
52
65
52
65
82
104
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