With LPS where the separation distance "s" is not observed
If the building has an air termination system and the separation distance between the air termination system and the panels is not observed, there is a risk of a direct lightning strike to the building and the PV system (impulse current with parameters of 10/350 µs). In this case, it is necessary to install SPD type T1, or in the better case to select a combined SPD type T1+T2. The family house normally belongs into the LPL III-IV level, for which the use of a surge arrester for PV applications with a discharge ability of 6,5 kA/ pole is required using a supplementary earthing connection. A suitable SPD representative on position A, or on positions A and D when the distance between the inverter and the panels is greater than 10 m, may be the HLSA6,5
PV 600 M. This product is determined specifically for UCPV = 600 V DC, but we also offer variants
for 800 V DC and 1 000 V DC. It is in a Y connection, which is resistant to earth fault of live conductors
and has zero residual (leakage) current. If you insist on a cheaper variant, we also offer variants in
the full voltage range in U connection with a marking /2 at the end of the product name. The entire product
range offers the advantage of an exchangeable module design - products marked with the letter M. It is
equipped with an internal DC arc fault disconnector and therefore no back-up fuse is required. If remote
monitoring of the surge protection status is required, the variants marked S can be used, i.e. for example HLSA6,5
PV 600 M S. The potential-free contact of this remote monitoring is then connected to the building‘s
control system (typically as an input of a PLC control system), where it permanently informs the investor
about the status of the surge protection device, without the need for physical control of the switchboard.
If the PV array is protected by an external LPS and if sufficient separation distance cannot be ensured,
the external LPS must be connected directly to the metal structure of the PV panels.
Since the building is equipped with an air termination system, it is necessary to install SPD type T1
in the main switchboard - at position C, or in the best case to select a fast reacting, varistor-based,
combined SPD type T1+T2+T3. For LPL level III-IV, the use of an arrester at the beginning of the installation
with a leakage capability of 12,5 kA/ pole is required. In this switchboard, at the beginning, before
the PEN conductor is split into PE and N conductors, it is common to see a TN-C system configuration with
a voltage value of 3 x 230 V / 50 Hz. These conditions correspond to the product HLSA12,5-275/3+0
M S. The marking M specifies the design with exchangeable module, S specifies the design with
remote monitoring. If the entire electrical distribution system of the building is of type TN-S, the configuration HLSA12,5-275/4+0
M S can be used. If the inverter is more than 10 m away from the main switchboard, it is necessary to repeat SPD type T1 directly in front of the inverter - position B. If we consider a three-phase TN-S system, a suitable representative is, for example, HLSA12,5-275/3+1 M S. The entire range of SPDs for the AC side is also available in an unchangeable design.
Our solutions
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SPD FOR DC (INVERTER)Nahrávám ...
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SPD FOR AC (INVERTER)Nahrávám ...
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SPD FOR ACNahrávám ...
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SPD FOR DCNahrávám ...
By ticking this box you will give us the information that you are not sure about the correctness of your selection. However, it is necessary to send an inquiry.