The MCF50-NAR combination arrester type 1+2 for lightning protection equipotential bonding according to 0185-305 (IEC 62305) is suitable for use in the pre-meter area in accordance with the VDEW guideline. The MCF50-NAR is used in buildings with lightning protection or overhead line feed-in in TN-S and TT systems. It is mounted on 40 mm busbars in the network-side connection compartment. The protection level of 1.5 kV protects the terminal devices in the system. The lightning current discharge capacity is 50 kA (10/350) total and 12.5 kA (10/350) per pole, follow current extinguishing up to 50 kA with a max. backup fuse of up to 160 A gL/gG. The FS variant is also equipped with a potential-free changeover contact, which enables remote signaling.
| Property | Value |
| Protection level LN: | 1.5 kV |
| Lightning impulse current (10/350 µs): | 12.5 kA |
| Nominal discharge current (8/20): | 20 kA |
| Highest continuous voltage AC: | 255 V |
| Nominal voltage AC: | 230 V |
| Protection level: | 1.5 kV |
| Follow current extinguishing capacity: | 0.1 kA |
| Mounting type: | busbar |
| Size: | other |
| Signaling on the device: | optical |
| Network type TT: | yes |
| Network type TN-CS: | yes |
| Network type TN-S: | yes |
| Max. Conductor cross-section rigid (single/multi-wire): | 35 mm² |
| Network type TN: | yes |
| Protection class (IP): | IP20 |
