PNOZ s8
Operating Manual PNOZ s8
21400-EN-10
18
Permitted operating height
The values stated in the technical details apply to the use of the device in operating heights
up to max. 2000 m above sea level. When used in greater heights, constraints have to be
taken into account:
}
Permitted maximum operating height 5000 m
}
Reduction of rated insulation voltage and rated impulse withstand voltage for applica-
tions with safe separation:
Maximum operation
height
Rated insulation
voltage
Overvoltage category
Max. rated impulse
withstand voltage
3000 m
150 V
II
2.5 kV
100 V
III
2.5 kV
4000 m
150 V
II
2.5 kV
100 V
III
2.5 kV
5000 m
100 V
II
1.5 kV
24 V
III
0.8 kV
}
Reduction of rated insulation voltage and rated impulse withstand voltage for applica-
tions with basic insulation:
Maximum operation
height
Rated insulation voltage Overvoltage category
Max. rated impulse
withstand voltage
3000 m
250 V
II
2.5 kV
150 V
III
2.5 kV
4000 m
250 V
II
2.5 kV
150 V
III
2.5 kV
5000 m
150 V
II
1.5 kV
100 V
III
1.5 kV
}
From an operating height of 2000 m the max. permitted ambient temperature is re-
duced by 0.5 °C/100 m
Operating height
Permitted ambient temperature
3000 m
50 °C
4000 m
45 °C
5000 m
40 °C
