Project Description



Modular surge arrester for use in TN-S systems with floating remote signaling contact.

  • Prewired complete unit consisting of a base part and plug-in protection modules
  • High discharge capacity due to heavy duty zinc oxide varistors/spark gaps
  • High reliability due to “Thermo Dynamic Control” SPD monitoring device
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SPD according to EN 61643-11 / IEC 61643-11type 2 / class IItype 2 / class II
Nominal a.c. voltage Un900 V AC (50/60 Hz)900 V AC (50/60 Hz)
Max. continuous operating a.c. voltage Uc1000 V AC (50/60 Hz)1000 V AC (50/60 Hz)
Nominal discharge current (8/20μs) In20 kA20 kA
Maximum discharge current (8/20μs) Imax40 kA40 kA
Voltage protection level UP4,2 kV4,2 kV
Response time tA25 ns25 ns
Max. mains-side over-current protection100 A gL/gG100 A gL/gG
Short-circuit current rating ISCCR25 kArms25 kArms
Temporary overvoltage (TOV) (UT) – Characteristic1205 V / 5 sec. – withstand1205 V / 5 sec. – withstand
Temporary overvoltage (TOV) (UT) – Characteristic1580 V / 120 min. – safe failure1580 V / 120 min. – safe failure
Range of operating temperatures (TU)-40/+80°C-40/+80°C
Operating state / fault indicationgreen / redgreen / red
Number of ports11
Cross-sectional area (min.)1.5 mm2 solid /flexible1.5 mm2 solid /flexible
Cross-sectional area (max.)35 mm2 stranded / 25 mm2 flexible35 mm2 stranded / 25 mm2 flexible
For mounting on35 mm DIN rail acc. to EN 6071535 mm DIN rail acc. to EN 60715
Enclosure materialthermoplasticthermoplastic
Place of installationindoor installationindoor installation
Degree of protectionIP 20IP 20
Capacity4 module(s), DIN 438804 module(s), DIN 43880
Type of remote signalling contactchangeover contact
a.c. switching capacity250 V / 0.5 A
d.c. switching capacity250 V / 0.1 A; 125 V / 0.2 A; 75 V / 0.5 A
Cross-sectional area for remote signalling terminalsmax. 1.5 mm2 solid / flexible

ac spd details 1