80 / 408
4
4/2
Technical
Section 11
Dimensions
Section 12
iPRF1 12.5r/PRF1 Master/
PRD1 25r/PRD1 Master
Type 1 and 2 LV surge arresters
Protection
Load protection
iPRF1 12.5r/PRF1 Master/PRD1 25r/PRD1 Master
The Type 1 surge arrester is recommended for electrical installations in the service
sector and industrial buildings protected by a lightning conductor or by a meshed
cage.
It protects electrical installations against direct lightning strikes.
It is used to conduct the direct lightning current, propagating from the earth
conductor to the network conductors.
It must be installed with an upstream disconnection device, such as a fuse or
circuit-breaker, whose breaking capacity must be at least equal to the maximum
prospective short-circuit current at the installation point.
iPRF1 12.5r and PRD1 25r surge arresters also provide Type 2 protection and
protect the electrical installation by finely clipping the lightning wave overvoltages.
The Type 1 range of surge arresters meets the
normative withstand capability of current wave type
10/350 μs (8/20 μs for Type 2 surge arresters).
It is suitable for use with TT, TN-S, TN-C and 230 V IT
earthing connection systems (neutral point connection).
In addition, the PRF1 Master surge arrester covers the
400 V IT system.
iPRF1 12.5r and PRD1 surge arresters are fitted with a
remote transfer contact to send "end-of-life indication"
information.
PRD1 surge arresters are fitted with easy-to-replace
withdrawable cartridges.
DB119037
PB104260-35
PRD1 25r
PB104264-35
PRD1 Master
PB104275-35
iPRF1 12.5r
iPRF1 12.5r (1P+N, 3P+N)
Type
Product solution
Fixed surge
arrester
1P+N
3P+N
iPRF1 12.5r
T1, T2
A9L16632
A9L16634
PRD1 25r (1P+N, 3P+N)
Cartridge
surge arrester
1P+N
3P+N
PRD1 25r
T1 + T2
16330
16332
PRD1 Master
T1
16361
16363
DB119038
DB119036