Overvoltage products Main power supplies
Transient overvoltages VE range Modular cabinets - 230/400 V~ networks Protection of an industrial site with a very high lightning risk level
Example based on the same site with an IT+N earthing system (refer to previous diagram).
Protection Protection type Network type SPD Backup protection Cabinet Dry contacts
1
HVLV transformer None
Main Board (Bg.1)1 production, stocks, ... F protection T1-25 / IT+N system 230 / 400 V three phase ASS3314T1 (x4) ASS5125FU (x4) ASM9400VE ASS9400CA
DB1 Building 1 offices, computer rooms G protection T2-C1D / IT+N system 230 / 400 V three phase ASS8214A2 ASS5015DQ ASN9200VE ASS9200CA
DB Building 2 Security building G protection T1-12.5 / IT+N system 230 / 400 V three phase ASS1118A1 ASS5015DQ ASM9200VE ASS9200CA
Building 22 Alarm & control system G protection T2-M / IT+N system 230 V single phase ASS4204T2 (x2) ASS2515DD ASN9200VE ASS9200CA
The HVLV transformer protection being not implemented, the MB protection is reinforced with a SPD type 1 with Iimp = 25 kA. 2 Single phase protection similar to G protection (with 2 poles protection).
Protections F
L1
PG 13
Protection G
L1
PG 13
Protection H
L1
PG 13
L2
PG 13
L3
PG 13
N
PG 1 3
L2
PG 13
L3
PG 13
N
PG 13
L2
PG 13
