Project Description



Integral housing coordinated lightning current and surge arrester for protecting single-phase TN systems against surges.

  • Coordinated spark-gap-based lightning current and surge arrester
  • Maximum systems availability due to RADAX Flow follow current limitation
  • Capable of protecting terminal equipment
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SPD according to EN 61643-11 / IEC 61643-11type 1 / class I
Nominal a.c. voltage (Un)230 / 400 V AC (50/60 Hz)
Max. continuous operating a.c. voltage (Uc)275 V AC (50/60 Hz)
Lightning impulse current (10/350μs) [L+N-PE] (Itotal)100 kA
Specific energy [L+N-PE] (W/R)625,00 kJ/ohms
Lightning impulse current (10/350μs) [L, N-PE] (Iimp)50 kA
Specific energy [L, N-PE] (W/R)1,25 MJ/ohms
Nominal discharge current (8/20μs) [L/N-PE]/[L+N-PE] (In)50 kA / 100 kA
Voltage protection level [L-PE]/[N-PE] (Up)2,0 kV / 2,0 kV
Follow current extinguishing capability a.c. (Ifi)50 kArms
Follow current limitation / Selectivityno tripping of a 20 A gL/gG fuse up to 50 kArms (prosp.)
Response time (tA)< 100 ns
Max. backup fuse (L) up to IK = 50 kArms (ta < 0,2 s)500 A gL/gG
Max. backup fuse (L) up to IK = 50 kArms (ta < 5 s)315 A gL/gG
Max. backup fuse (L) up to IK > 50 kArms200 A gL/gG
Max. backup fuse (L-L’)125 A gL/gG
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic440 V / 120 min. – withstand
Range of operating temperatures [parallel] / [series] (TU)-40…+80°C / -40…+60°C
Operating state / fault indication
Number of ports1
Cross-sectional area (L, L’, N, N’, PE) (min.)10 mm2 solid / flexible
Cross-sectional area (L, N, PE) (max.)50 mm2 stranded / 35 mm2 flexible
Cross-sectional area (L’, N’) (max.)35 mm2 stranded / 25 mm2 flexible
For mounting on35 mm DIN rail acc. to EN 60715
Enclosure materialthermoplastic
Place of installationindoor installation
Degree of protectionIP20
Capacity4 module(s), DIN 43880