Ready-wired AC and DC protection assembly for three-phase systems of 8-12 kW with 2 strings, with the sealable meter box 35,5 x 22,5 x 14 cm included.
Any photovoltaic system must be able to be stopped quickly and must be protected from short circuits and from the voltage peaks produced by lightning or by grid switching. This panel gathers in a single enclosure all the devices that do these things, on both routes: between the panels and the inverter and between the inverter and the general panel of the building. It is delivered wired from the factory, as a block ready to be mounted.
It is sized for three-phase systems of 8-12 kW, the usual class for large households and small businesses, with the panels split into two strings, each with its own protection and disconnector. At this power, the string cables are longer, and the surface of the pick-up loop grows, so surge protection matters on the direct current side too, not only on the grid side. The enclosure is of hard plastic, with protection against dust, humidity and mechanical shocks. The package includes the sealable box for the distribution operator's meter, of 35,5 x 22,5 x 14 cm, with openings for applying the official seals and with access blocked for unauthorised persons.
Product code 8-12-AC/DC-2str-tri, for three-phase on-grid photovoltaic systems of 8-12 kW, DC configuration on 2 strings with separate protection and disconnection. The switchgear on the alternating current side is sized for the current corresponding to this power range; the protections cover short circuit and overload on both sides, transient overvoltages, including on DC, and disconnection for interventions. Delivery pre-assembled and wired, with a sealable meter box 35,5 x 22,5 x 14 cm; the rated values of the individual devices are set by the manufacturer according to the power of the system and are not published separately in the product datasheet.
Suitable for a large house or a small business with a three-phase connection and a system of 8-12 kW, with the panels organised in two strings.
| Product code | 8-12-AC/DC-2str-tri |
|---|---|
| Purpose | Three-phase photovoltaic systems 8-12 kW |
| DC configuration | 2 photovoltaic strings |
| Grid type | Three-phase, on-grid |
| Protections included | AC and DC protection: short circuit, overload, overvoltage, disconnection |
| Meter box | Sealable for the distribution operator, 35,5 x 22,5 x 14 cm |
| Enclosure material | Hard plastic, resistant to dust, humidity and mechanical shocks |
| Delivery form | Pre-assembled and wired |
Generic product — standard specifications
The AC/DC electrical panel with code 8-12-AC/DC-2str-tri is the protection assembly for three-phase on-grid photovoltaic systems in the 8-12 kW class, with two strings of panels. The switchgear on the alternating current side is sized for the current corresponding to this power range, and on the direct current side each of the two strings has its own protection and disconnection.
The functions provided are the disconnection of the installation for interventions, protection against short circuit and overload on both sides and protection against transient overvoltages, including on the DC side, where the length of the string cables and the surface of the pick-up loop increase the risk of induced overvoltages. This configuration is the usual one for prosumer installations sized around the power ceiling approved for households and small businesses.
The enclosure is made of hard and resistant plastic, with protection against dust, humidity and mechanical shocks. The package includes the sealable box for the distribution operator's meter, with the dimensions 35,5 x 22,5 x 14 cm, provided with special openings for applying the official seals and with access blocked for unauthorised persons. The panel is delivered pre-assembled and wired, and the rated values of the individual devices are set by the manufacturer according to the power of the system and are not published separately in the product datasheet.
The module that gives a Huawei inverter internet through a SIM card, where the fixed network does not reach. It plugs into the USB port, serves up to 10 inverters, IP65.
The meter that tells the Huawei inverter how much the building consumes, so that it does not send current into the grid. Three-phase, up to 250 A per phase, through the included current transformers.
The single-phase meter that measures at the connection point what comes in and what goes out, so that the Huawei inverter can limit the injection into the grid. Direct connection up to 100 A, consumption below 1 W.
It shows in real time how much energy enters and leaves the house, so that the installation can regulate itself. Indirect measurement with 3 clamps of 100 A, accuracy ±1%, DIN rail mounting.
