Poznámky redaktora
1 Rated impulse voltage
Table 4.6.1 Clearance Distances
The clearance distance the shortest distance the air between two
conductive parts. assumed that, changes the
insulating material result aging, not influence the clearance
distance. the rated conductor-conductor and
conductor-earth voltage. Additionally,
VDE 0627 applies for connectors.g. This
can include more than one value, e.
4.
The rated voltage depends number criteria:
- Profile design the insert
- Properties the insulating material
- Clearance and creepage distances
- Degree pollution: evaluation the environment which the device
is operated
DIN VDE 0110-1 states the principles for specifying the clearance and
creepage distances well for determining other criteria. The degree pollution has only slight influence on
clearance distances 1.6 Voltage Clearance and Creepage Distances
The manufacturer should specify the rated voltage for every connector.160
4.5 mm.6.
The following are the major criteria for determining the minimum clearance
distance:
- Rated voltage
- Degree pollution (limited)
- Inhomogeneous/homogeneous field
- Overvoltage category
4.1.15:
Nominal mains voltage for
AC voltage systems
based DIN IEC 38, V
Rated impulse voltage for
over voltage category
I III IV
230 400
277/480°
1,500 2,500 4,000 6,000
400 690 2,500 4,000 6,000 8,000
1,000 4,000 6,000 8,000 12,000
1’The nominal mains voltage 500 included
