Overvoltage products Main power supplies
Transient overvoltages Modular cabinets - VE range - 120/208 V and 230/400 V~ networks Surge protective devices guideline (1)
The installation of the surge protective devices should be done in compliance with the electrical safety rules of the electrical standards NF C 15-100, IEC 60364 or all equivalent electrical standard in the country. As for all electrical equipments, their installation should be done according to the electrical safety rules, for the protection of the persons and equipments, against the risks of faults of the network and the directs or indirect contacts, coordination and of selectivity of the protection devices for the protection against the heating and fires risks, types of protection devices specified in the technical sheets of the SPD `s.
According to the risk assessment
Risk assessment (methodology: refer also the practical guide) HVLV downstream protection2 Main Board Divisionary board Equipments at more than 30 m3 Secondary buildings (main boards) Risk assessment (methodology: refer also the practical guide) HVLV downstream protection Main Board Divisionary board Equipments at more than 30 m Secondary buildings (main boards)
3 2
Level of risk WITH lightning conductor1 Very high (R1) T1-25 T2-60 T2-40 T1-12.5 T1-25 T1-12.5 T2-60 T2-40 T1-12.5 T1-12.5 T2-40 T2-10 T1-12.5 High (R2) T1-25 T1-12.5 T2-40 T2-10 4 T1-12.5 Medium (R3) T1-12.5 T2-40 T2-10 4 T1-12.5 Low (R4) T1-12.5 T2-40 T2-10 4 T1-12.5
Level of risk WITHOUT lightning conductor Very high (R1) T1-12.5 T2-60 T2-40 T2-60 T1-12.5 T2-60 T2-40 T2-10 T2-40 T2-60 T2-40 T2-10 4 T2-40 High (R2) T1-12.5 T2-40 T2-10 T2-10
4
Medium (R3) T2-40 T2-10 4 T2-10
4
Low (R4) T2-10 T2-10 4 T2-10 4 T2-10 4
T2-10
T2-10
According to the protection mode
Mode 5 "3+1" ("1+1") "3+0" "4+0" ("2+0") Type of connection 5 "C1" "C2" "C2" Protected conductors 3 (1) surge arrestors in between line and neutral (differential mode) 1 spark gap in between neutral and earth (common mode) 3 surge arrestors in between line and earth (common mode) 4 (2) surge arrestors in between active cables (live and neutral) and the earth (common mode)
According to the risk assessment
Range TT system TNS system TNC system IT system IT+N system T1-25 (Iimp = 25 kA) ASS3114A1 ASS3114A1 ASS3312T1, x3 ASS1106C1, x3 ASS1118A1, x2 Protections recommended for three phases networks 230/400 V WITH lightning conductors T2-40 T2-60 T1-12.5 T2-10 (Imax = 40 kA) (Imax = 60 kA) (Iimp = 12.5 kA) (Imax = 10 kA) ASS4212D2 ASS8212A2 ASS1114D1 ASS1104D2 ASS1112C1, x2 ASS1112C1, x1ASS1112L1, x1 ASS1106C1, x1ASS1106L1, x1 ASS1118A1 ASS8212A2 ASS8212B2 ASS8214B2 ASS8214A2 ASS4212A2 ASS4212B2 ASS4214B2 ASS4214A2 ASS1104D2 ASS1108A2
TT system: Recommendations for the electrical safety
A protection type "C1" ("4+0" or "2+0") will be obligatorily installed downstream from the differential circuit breaker (RCD) of the board in which is integrated in order to ensure the protection against the indirect contacts (currents of defects). A protection type "C2" ("3+1" or "1+1") will be installed as well upstream as downstream from the differential circuit breaker of the board. 1 Independently of the risk assessment, a protection type 1 with limp = 12.5 kA min. (class I of tests, EN 61643-11) is compulsory at the input of a protected building, (or belonging to a protected site) against the direct impact of the lightning (lightning conductor...). 2 Protections recommended for important industrial sites and sensitive sites. 3 Protections recommended when the equipment to protect are distant more than 30 m from the upstream protection (effects of lines which can provoke overvoltages superior to the residual tension of the surge protective device). 4 Optional. Protections recommended if the continuity of service is required or in presence of sensitive equipment. 5 2+0, 3+0, or 4+0 (type "C1"): protection L-PE and N-PE (connection of type 1) 3+1 or 1+1 (type "C2"): protection L-N and N-PE (connection type 2). L: line N: neutral PE: earth.
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