With OBO, you are on the safe side

MCF-NAR – lightning and surge protection in the power-side connection compartment

The combination arrestor MCF-NAR, type 1+2, is the newest member of the OBO Bettermann team against surge voltages. The name suffix NAR stands for "netzseitiger Anschlussraum" (power-side connection compartment), because the installed spark gap technology qualifies the surge protection device (SPD = Surge Protection Device) for use in the pre-meter area according to VDE-AR-N 4100.

The new technical connection rules for low voltages VDE-AR-N 4100 for the connection of customer systems to the low-voltage network require the surge protection device to be placed as close as possible to the supply point. The MCF-NAR is installed in the lower connection compartment, in accordance with the connection rules and thus provides reliable protection against surge voltages directly at the supply point.

The installation on the 40 mm busbar system of the meter cabinet means that mounting is particularly simple and time-saving.

The right variant for every application

With the variants for housing without external lightning protection, for housing and commercial buildings with external lightning protection (lightning protection class 3+4) and for hospitals and data centres (lightning protection class 1+2), OBO can always offer the right solution.

For the different areas of application, there is a 3-pin version for TN-C-networks and a 3+NPE version available for TT and TN-S networks.

Safe and future-orientated

The VDE-tested combination arrestors meet the highest international standards and, with a protection level of ≤1.5 kV, also increase the safety of downstream terminals. The voltage limitation of the SPDs guarantees the insulation protection, in order to avoid spark formation and fires.

To ensure reliable protection at all times, all the devices possess a non-consuming status display approved for the pre-meter area. This signals directly whether the devices are still functioning. In addition, all the variants are also available with remote signalling and can therefore be connected to existing or future building management technology.

A QR code on the devices helps to recall technical information from the OBO website quickly using various end devices, such as a smartphone or tablet PC.

The MCF-NAR combination arrestor at a glance:

  • Lightning protection equipotential bonding according to VDE 0185-305
  • Tested according to VDE 0675-6-11/DIN EN 61643-11
  • Fulfils the requirements of DIN VDE 0100-443 and -534
  • Fulfils the requirements of the network operators VDE-AR-N 4100
  • TNC and TN-S/TT versions for every application area
  • Arrestor classification: T1+T2, protection level ≤1.5 kV
  • Lightning current discharge capacity to 75 kA (10/350) 3-pin and up to 100 kA (10/350) 3+NPE
  • Follow current quenching capacity up to 50 kA and max. backup fuse up to 315 A gL/gG, depending on the variant
  • Installation on 40 mm busbars in front of the meter in the NAR (power-side connection compartment)
  • Screw fastening secures permanent contact to the busbar
  • Leakage current-free and non-consuming
  • VDE-tested

A strong team

The new combination arrestors not only provide reliable protection against surge voltages – they are real team players and can be easily combined with additional surge protection devices. VDE 0100-534 requires the installation of an additional surge protection device for cable lengths of 10 metres or more and VDE 0100-443 recommends additional protection of data and information technology.

Round off your protection – with surge protection devices from OBO Bettermann: