NAREW – Medium voltage switchgear
Technical data
Rated insulation voltage | kV | up to 12 | up to 17,5 | |
Rated lightning impulse withstand voltage (1,2/50μs) | kV | 75/85 | 95/110 | |
Rated power frequency withstand voltage | kV | 28/32
42/48 |
38/45 | |
Rated frequency | Hz | 50 | ||
Rated continuous current | A | 630-1250 | ||
Rated short time withstand current | kА | up to 25/3s | ||
Rated peak withstand current | kА | up to 63 | ||
Withstand for internal arcing fault | kА | up to 25/1s | ||
Degree of protection | IP 4X | |||
IAC classification (class of resistance to internal arc) | AFLR | |||
PM/PI classification (class of partitions) | PM | |||
LSC classification (class of compartment accessibility) | LSC2A | |||
Weight | kg | 350-950 | ||
Bus-bar system | single | |||
Standards | IEC 271-200:2007,
IEC-60694:2004, ГОСТ 14693:1990 |
|||
Overall dimensions**) | Width | mm | 600-750 | |
Depth | mm | 1000-1085 | ||
Height | mm | 2000-2075 |
*) required according to ΓOCT;
**) without external guards, covers, doors;
Environmental operating conditions
Switchgear NAREW with installed equipment are adapted for indoor operation under normal conditions, with the following environmental conditions:
Installation altitude above sea level
|
to 1000 m |
|
Ambient temperature:
|
peak short-time |
313 K (+40°C) |
maximum daily average |
308 K (+35°C) |
|
maximum yearly average |
293 K (+20°C) |
|
minimum sustained |
268 K (-5°C) |
|
Air relative humidity at 313 K (+40°C):
|
during the start up |
max. 80% |
during standstill or operation |
max. 95% |
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