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Surge arrester – Type 2

for sites frequently struck by lightning

  • The SURGYS® G70 surge arrester is designed to ensure reinforced protection of single-phase and three-phase networks. It acts against industrial operation overvoltages and overvoltages owing to lightning.
  • This type of Surge Protective Device is particularly recommended in case of heightened risk of nearby lightning strikes.
Monobloc base with plug-in module
  • The SURGYS is supplied complete and ready for installation. Its Monobloc base is fitted with replaceable plug-in modules which, at the end of their service life, can be easily and quickly replaced without having to disconnect the Monobloc base.
Remote signalling
  • The remote plug-in signalling contact allows alarm report to a supervision station.
End of service life indicator
  • End of service life indication for internal components.
  • Main power control switchboard.
  • Main safety switchboard.
  • Main switchboard to high power inverters.
  • Distribution boards of remote sites.
  • Protection of electrotechnical equipment such as motors, switching devices, control devices.
application SURGYS® G70


Front panel

front panel SURGYS® G70 1. Monobloc base
2. End of service life indicator
3. Remote signalling contact
4. DIN-rail mounting
5. Plug-in modules



Network type 230 / 400 VAC
Neutral systems TT-TN-IT
Nominal voltage Un 400 VAC
Maximum voltage Uc 400 VAC
Temporary overvoltage at industrial frequency UT 400 VAC
Protection characteristics
Level of protection Up 1.8 kV
Maximum discharge current ( 1 shock 8/20 μs) Imax 70 kA
Nominal discharge current ( 15 shocks 8/20 μs) In 30 kA
Mode of protection common
Associated characteristics
Residual current Ic < 1 mA
Response time tr < 25 ns
Follow current If none
Rated conditional short circuit current Icc 25 kA
Recommended disconnectors fuses gG 100 A(1)
Type of disconnection indicator mechanical
Number of disconnection indicators 2
Remote signalling contact
Contact type inverter
AC making capacity 0.5 A
DC making capacity 2 A
AC nominal voltage 250 VAC
DC nominal voltage 30 VDC
Sustained current 2 A
Connection type through screw block
Max. cross-section of terminal connections 1.5 mm2
Operating conditions
Operating temperature – 40 … + 85 °C
Storage temperature – 40 … + 85 °C
(1) Value complies with article 534.1.5.3 of standard NF C 15100: higher ratings may however be used if reinforced continuity of service of the lightning rod branch is desired.


case SURGYS® G70
Type monobloc design
2P Dimensions W x H x D 36 x 90 x 67 mm
3P Dimensions W x H x D 54 x 90 x 67 mm
Dimensions W x H x D in 4 poles 72 x 90 x 67 mm
Case degree of protection IP20
Terminal block degree of protection IP20
Case material polycarbonate UL94-VO
Network connection cross-section 4 … 25 mm2
Earth connection cross-section 4 … 25 mm2(1)
(1) Minimum cross-section 10 mm2 with lightning rod.



No. of poles Number of side-by-side modules Reference
2 2 4982 1720
3 3 4982 1730
4 4 4982 1740
Description of accessories Reference
Spare plug-in module m-G70 4982 0719