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Technical
Section 9
Dimensions
Section 10
PRF1/PRF1 Master/PRD1 25r/PRD1
Master surge arresters
Type 1 and 2 LV surge arresters
Load protection
4
PRF1/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. PRF1 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. PRF1 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.
PRF1 12.5r
PRD1 25r
PRD1 Master
PRF1
PRF1 12.5r
Type of surge
arrester
Product solution
Fixed surge arrester
1P+N
3P+N
Combi PRF1
16626
16629
PRF1
T1
16625
16628
16621 + 16623
3 x
16621
+
16624
PRF1 12.5r
T1
,
T2
16632
16634
PRF1 Master
T1
PRD1 25r
PRD1 Master
Cartridge surge arrester 1P+N
3P+N
PRD1 25r
T1
+
T2
16330
16332
PRD1 Master
T1
16361
16363