What changes and extensions does the new VDE-AR-N 4100 bring? What do the new terms mean?
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01
counter field (ZF)
According to VDE-AR-N 4100, the counter field must be 450 mm high. 300 mm are available for accommodating the measuring device (eHZ). The space for additional applications (RfZ) with a height of 150 mm (02) is part of the meter field. Two electronic household meters can be connected next to each other on a Hager BKE-I meter panel. Thanks to the modern plug-in technology, these can be changed at any time without interrupting the voltage.
02
Room for additional applications (RfZ)
The RfZ room is 150 mm high. According to VDE-AR-N 4100, all necessary equipment of the network or metering point operator can be accommodated on its 12 subunits per meter field - e.g. B. Smart Meter Gateways (SMG), control devices for remote shutdown, fuse box, touch-proof RJ45 jack and tariff management devices. The OKK (opto-electrical interface) to be used as required at the BKE-I meter location also ends in the RfZ and is patched there. It is responsible for the communication between eHZ and SMG. The VDE-AR-N 4100 states that the RfZ may not be used as a circuit distributor or for customer-specific switching devices.
03
Plant-side terminal compartment (AAR)
The VDE-AR-N 4100 stipulates that the plant-side connection space (AAR) must be 300 mm high and may not be used as a circuit distributor. The AAR offers space for different equipment, such as:
- Main line branch terminals (HLAK) or main switch - for connecting the supply line to the circuit distributor - or a residual current protective device (RCD) for protecting the supply line to the circuit distributor
- Release relay - for controllable consumption devices according to §14a EnWG
- HAN interfaces – for wired transmission of data to the customer system (note: do not confuse this with the RJ45 socket for data transmission to the meter operator [WAN]).
- FI protective devices, circuit breakers and combinations of these two devices (e.g. FI/LS) - to protect a maximum of 3 AC circuits max. 16 A/10 kA (e.g. for basement lighting, washing machine, dryer). One of these 3 possible circuits may also be used to protect generation systems or charging devices for electric vehicles. Note: the use of 6 kA devices is permitted in combination with a Hager SLS.
- Surge protection (SPD) – of type 1 or type 2. However, Hager generally recommends installing the combined arrester for the mains-side terminal compartment.
04
Grid-side terminal compartment (NAR)
With regard to the grid-side connection space (NAR), the application rule VDE-AR-N 4100 defines as general installation specifications that
- the main line is inserted and connected from below, from the side, from behind or through a feeder housing arranged on the side of the meter cabinet (insertion from above is not permitted),
- the cover strips can be locked from the inside and
- a 5-pole busbar system is available.
VDE-AR-N 4100 states that a selective main line circuit breaker (SLS) that can be used by laypersons and that can be locked and sealed must be used as the disconnecting device for the customer system. A combined arrester for overvoltage protection according to VDE 0100-443 may also be used in the NAR (e.g. SPA501Z).
05
Termination point counter space (APZ)
A room for APZ according to VDE-AR-N 4100 and DIN VDE 0603-1 is to be provided in the meter cabinet. It serves as an interface between the house transfer point (HÜP) and the meter space. The APZ must be at least 300 mm high and have its own sealable contact protection cover. There z. B. a router of the measuring point operator can be integrated. To transmit data between the meter and the APZ, lay a network cable: at least Cat. 5, better Cat. 7. The network lines must be connected to each other via protectively insulated RJ45 sockets - one in the RfZ, one in the APZ.
Furthermore, a power supply from the NAR must be laid in the APZ. The application guide VDE-AR-N 4100 lists both the communication field and the distributor field in the meter cabinet (adjacent to the upper or lower edge of the housing) as possible installation locations for the APZ. Placing the APZ outside the meter cabinet is not permitted.
06
Separate voltage taps
For all common connection variants, Hager has the appropriate equipment packages in its range, which include earth and short-circuit proof cables as well as suitable protective devices (25 kA). These can be found in the current meter space lists. In our planning software ZPlan, the variants approved by the network operator are automatically included in every plan.
Source: https://hager.com/de/wissen/normen/vde-ar-n-4100