Basic HTML Version
4/40
Technical
Section 9
Dimensions
Section 10
PF surge arresters
Type 2 or 3 LV surge arresters
Load protection
4
Rated discharge current (Imax)
Type of protection
Incoming Secondary
(type 2 or 3)
65 kA
Very high risk level (strongly exposed site)
PF65
40 kA
High risk level
PF40
20 kA
Medium risk level
PF20
8 kA
PF8
Each surge arrester in the range has a specific application:
Incoming protection (type 2):
b
b
The PF65(r) is recommended for a very high risk level (strongly exposed site)
v
v
The PF40(r) is recommended for a high risk level
v
v
The PF20 is recommended for a medium risk level
v
v
Secondary protection (type 2 or 3):
b
b
The PF8 ensures secondary protection of loads to be protected and is placed in
v
v
cascade with the incoming surge arresters. This surge arrester is required when
the loads to be protected are at a distance of more than 30 m from the incoming
surge arrester.
The PF surge arresters with “r” indication have remote transfer of the information:
“surge arrester to be replaced”.
The PF multi-pole single-piece surge arrester range is
adapted for earthing systems: TT, TN-S, TN-C.
Type 2 surge arresters are tested with a 8/20 μs current
wave.
Type 3 surge arresters are tested with a 12/50 μs and
8/20 μs combined wave.
1P+N.
3P+N.