Combination arrestor, 3-pole + NPE

Combination arrester, 4-pole, for use in TN-S and TT networks.

Completely pre-terminated and ready for connection, consisting of:
MCD 50-B: Coordinated lightning current arrester, type 1 (Class B) to EN 61643-11 and
MCD 125-B/NPE: Coordinated N-PE spark gap, type 1 (Class B) to EN 61643-11 for use in TN- and TT systems. Interface 0 to 1 according to lightning protection zone concept according to IEC 61312-1 and VDE 0185-305 (IEC 62305).

• Arresting capacity 50 kA (10/350 µs) per pole (L-N)
• Arresting capacity 125 kA (10/350 µs) per pole (N-PE)
• Conforms to VDN Directive 2nd Edition 2004
• Protection level • Line follow current quenching 25 kA Ipeak
• lncl. plug caps for identifying the connections
• Encapsulated, non-extinguishing spark gap

Application: Lightning protection equipotential bonding in buildings with external lightning protection of Class I to IV and in standard distributor housings.

Connection options

MCD 50-B 3+1

Nominal voltageUN230
SPD to EN 61643-11Type 1
SPD to IEC 61643-11class I
Lightning protection zone LPZ0→2
Impulse discharge current (10/350)Iimp50
Total discharge current (10/350)Itotal125
Nominal discharge current (8/20)In50
Arrestor surge current (8/20) [total]ITotal 8/20125
Voltage protection levelUp1
Response timetA
Follow current quenching capacity (eff) [N-PE]Ifi25
Maximum back-up fuse500
Temperature rangeϑ-40-85
Division unit TE (17.5 mm)8
Protection ratingIP20
Connection cross-section rigid10-50
Connection cross-section, multi-wire10-35
Connection cross-section, flexible10-25