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housing size height min.<br />
creepage<br />
distance<br />
max. height<br />
grading ring/<br />
Potential<br />
ring<br />
figure<br />
insulation of arrester housing<br />
(applied to standard atmosphere)<br />
p.f withstand<br />
voltage<br />
(wetted)<br />
lightning<br />
impulse<br />
withstand<br />
voltage<br />
switching<br />
impulse<br />
withstand<br />
voltage<br />
(wetted)<br />
SIWL<br />
250/2500<br />
h<br />
mm<br />
mm<br />
m<br />
kg<br />
d<br />
mm<br />
PFWL<br />
50Hz<br />
LIWL<br />
1.2/50<br />
A 497 1470 17 - 1 130 310 185<br />
B 721 2270 21 - 1 190 410 270<br />
C 1337 4500 27 - 1 350 680 515<br />
D 1505 5100 42 - 1 390 750 575<br />
B+C 2098 6770 50 700 2 525 990 785<br />
1,4<br />
B+D 2266 7370 63 700 2 570 1055 845<br />
1,3 C+C 2714 9000<br />
without prestress<br />
61 700 2 682 1253 1030<br />
C+D 2882 9600 70 900 2 725 1325 1090<br />
1,2<br />
D+D 3050 10200 85 900 2 without 770 prestressed: 1400 two line discharges 1150 of class 3 /<br />
1,1<br />
1,0<br />
0,9<br />
0,8<br />
Mechanical guarantee data<br />
Torsional strength : 500 Nm<br />
Maximum permissible service load : 3500 Nm<br />
Tensile<br />
continouos<br />
strength<br />
operating voltage<br />
: 10 kN<br />
0,7<br />
0,1 1 10<br />
t (s)<br />
100<br />
1000<br />
h<br />
h<br />
U / U r<br />
d<br />
50<br />
figure 1/Abb.1<br />
figure 2/Abb.2
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