Technical Requirements
Environmental conditions
The straight connector system is
suitable for indoor installation under environmental conditions:
l Severe atmospheric and
industrial air pollution, coal dust, sea salt
l High atmospheric humidity
as experienced in coastal or desert areas
l Annual variation in air
temperature: -10℃to +55℃
l Annual mean air
temperature: +25℃
l Maximum relative humidity:
90%
l Average relative humidity:
70%
l Average ambient
temperature measured over a period of 24 hours does not exceed: +35℃
l Maximum difference of
ambient temperature from day to night: +25℃
l Altitude: up to 1000m
|
Item
|
Parameter
|
|
Rated system
voltage
|
33kV
|
|
The maximum
operating voltage, Um
|
36 kV
|
|
Rated frequency
|
50Hz
|
|
Power frequency
withstand voltage (AC) 5min
|
81kV
|
|
Withstand
voltage (DC) 15min
|
72kV
|
|
Insulation level
of equipment: basic
insulation level
BIL (1.2/50μsec)
|
170 kV peak
|
|
Standard
|
IS 1516-4
(equivalent to
IEC 60502-4)
|
|
HD 629.1
|
|
EN 50181
|