Article number: 10 973
  • Lightning impulse current arresters type T1 ensure the equipotential bonding and eliminate the effects of lightning current in single-phase and three-phase power supply systems.
  • Products contain multiple non-exhausting spark gaps, thanks to which they are able to discharge the highest lightning impulse current.
  • Suitable for objects with considerable levels of protection LPL I and LPL II, such as big industrial complexes and properties of particular importance – hospitals, banks, power plants.
  • Installed as close as possible the overhead line enters the building i.e. the electric power substation, electrometer or the main distribution boards.
  • If the product contains two PE (or PEN) terminals, it must not be used as a PE (PEN) bridge.
  • LED indication specifies a version with LED fault signalisation.
  • S indication specifies a version with remote monitoring and LED fault signalisation.
Impulse discharge current for class I test (10/350) Iimp 50 kA
Test class according to EN 61643-11:2012 (IEC 61643-11:2011) T1
System TN-S
Number of poles
Rated operating AC voltage UN 230 V
Maximum continuous operating voltage AC UC 255 V
Charge Q 25 As
Specific energy for class I test W/R 625 kJ/Ω
Total discharge current (10/350) L1+L2+L3+N->PE ITotal 200 kA
Nominal discharge current for class II test (8/20) In 50 kA
Voltage protection level at Iimp Up < 2 kV
Temporary overvoltage test (TOV) for tT = 5 s UT 337 V
Temporary overvoltage test (TOV) for tT = 120 min UT 440 V
Response time tA < 100 ns
Maximal back-up fuse 500 A gL/gG
Short-circuit current rating at maximum back-up fuse ISCCR 25 kArms
Follow current interrupt rating Ifi 25 kArms
Lightning protection zone LPZ 0-1, LPZ 1-2
Housing material Polyamid PA6, UL94 V-0
Degree of protection IP20
Operating temperature ϑ - 40 ÷ 70 °C
Humidity range RH 5 ÷ 95 %
Minimum cross-section of connected Cu conductors accord. to HD 60364-5-53:2022 (doesn't apply to „V“ connection) for T1 S 6 mm² (L, N)
16 mm² (PE, PEN)
Clamp fastening range (solid conductor) 2.5 ÷ 25 mm2
Clamp fastening range (stranded conductor) 2.5 ÷ 16 mm2
Tightening moment 4
Installation On DIN rail 35 mm
Modular width 8
Operating position Any
Product placement environment Internal
Signalling at the device None
Remote signalling No
Modular design No
Lifetime > 100 000 h
Quick contact
Ing. Aneta Sčebelová
 +420 494 942 314