Explanation/Annotation:To protect electric equipment of transformer station and ac networks hour
òîòîé 50 cycles from atmospheric and short-term commutation ïåðåíàïðÿ
æåíèé
Detailed model description:Over-extensions. Is intended for to protect electric equipment on
äñòàíöèé and ac networks by the frequency 50 cycles from atmospheric and time
êîâðåìåííûõ switching overvoltage.
the active part of clippers consists of in series with ok
ñèäíî-öèíêîâûõ resistors with high linear voltage-current õàðàêòåðèñòè
SIF .
the internal cavity of tyre with resistors shall be filled in òåïëîïðî
aqueous base.
the protective effect can be explained by the fact that in case of appearing of dangerous to èçîë
over-extension ÿöèè elapsing through clipper the pulse current âñëå
äñòâèå of high non-linearity of resistors shall not create dangerous to èçîëÿöè
and voltage rise.
priority
- low protective level for all types
over-extensions
- high energy intensity
- enhanced resistance to effects
pollution
- explosion safety and seismic resistance
small sizes and mass
technical characteristics
class of network voltage, apartment. 110
maximum operating voltage, apartment. 73
voltage on clipper, kW
20 minute. 88
20 S.. 97
1 S.. 105
0, 15 S.. 112
nominal discharge current, K.. 10
design current of commutation
over-extension at a wavelength of 30/60 usec, A.. 400
discharge voltage in case of
design current
switching overvoltage,
not more, apartment. 178
discharge voltage in case of
wave of pulse current
8/20 usec, with amplitude, not more, kW
250 A.. -
500 A.. 180
2500 A.. -
5000 A.. 216
10000 A.. 228
twentyfold current throughput
ability
in case of right-angled current wave
duration 2000 usecs. 4
00
in case of wave of pulse current 8/20 usec, K.. 10
twofold current throughput
ability
in case of wave of pulse current 4/10 usec, K.. 65
leakage path length of outside insulation,
no less than, refer to. |
