IEC TS 61312-2:1999

Foreword
1 General
      1.1 Scope and object
      1.2 Normative references
      1.3 Terms and definitions
      1.4 Symbols
2 Electromagnetic source and victim of interference
3 Gridlike spatial shields
      3.1 Gridlike spatial shields in the case of nearby lightning
             strikes
      3.2 Gridlike spatial shields in the case of direct lightning
             strikes
      3.3 Gridlike spatial shields surrounding LPZ>2
      3.4 Experimental evaluation of the magnetic field inside
             gridlike spatial shields
      3.5 Installation rules
4 Earthing system
      4.1 Earth termination system
      4.2 Bonding network
      4.3 Combination of the earth termination system and the bonding
             network
      4.4 Example of shielding, bonding and earthing layout
Annex A (informative) Earthing and bonding definitions
Annex B (informative) Calculation of induced voltages and currents
                      into loops resulting from installations
                      B.1 Situation inside LPZ1 in case of nearby
                             lightning strikes
                      B.2 Situation inside LPZ1 in case of direct
                             lightning strikes
                      B.3 Situation inside LPZ>2
Annex C (informative) Calculation of the magnetic field inside gridlike
                      magnetic shields
Bibliography

Provides methods for the evaluation of the effectiveness of shielding measures against LEMP for structures with information equipment such as electronic systems in case of direct and nearby lightning strikes. In addition it provides rules for bonding measures inside structures and for earthing methods relating to LEMP.