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AC Combiner Box 20 A Three-Phase with Type 2 SPD and 300 mA Type A RCD
AC Combiner Box 20 A Three-Phase with Type 2 SPD and 300 mA Type A RCD
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€170.48
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€170.48
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AC Combiner Box 20 A Three-Phase with Type 2 SPD and 300 mA Type A RCD
Alternating current combiner box for three-phase photovoltaic systems, with integrated residual current protection. It must be installed on the AC side between the inverter output and the distribution board and provides, in a single pre-wired enclosure, all the protections for the grid connection line.
Inside there are a 20 A miniature circuit breaker, which protects the three-phase line against overload and short circuit and makes it possible to isolate the inverter, a Type 2 surge protective device (class II) for limiting transient overvoltages, and a 300 mA Type A residual current device, the sensitivity typically used for protection against fire risks caused by earth leakage currents. On a 400 V three-phase grid, 20 A corresponds approximately to inverters of up to about 13.8 kW.
Key features
Three protections in one boxOvercurrent, earth fault and transient overvoltages handled by a single pre-wired unit.
300 mA Type A RCDProtects against earth leakage currents, including the pulsating unidirectional ones generated by the inverter electronics.
Type 2 surge arresterThe class II SPD diverts to earth the transient overvoltages caused by indirect lightning strikes and switching operations.
20 A miniature circuit breakerProtects the three-phase line towards the main board and acts as the isolating device for the inverter.
For three-phase inverters20 A on a 400 V grid: suitable for inverters with an indicative power of up to about 13.8 kW.
Ready to install319 × 259 × 144 mm enclosure weighing 2.6 kg, with components already fitted and internally wired.
Technical specifications
| Feature | Value |
|---|---|
| Switchboard type | AC combiner box for photovoltaic systems with residual current protection |
| System side | Alternating current (AC), between the inverter and the distribution board |
| Number of poles / phases | Three-phase (3L + N) |
| Nominal current | 20 A |
| Indicative inverter power | Up to approx. 13.8 kW (400 V three-phase, 20 A) |
| Surge protective device (type) | Type 2 SPD (class II) |
| Miniature circuit breaker (MCB) | Yes, 20 A |
| Residual current device (RCD) | Yes, 300 mA Type A |
| Dedicated isolator switch | Not present: isolation is provided by the miniature circuit breaker |
| Dimensions | 319 × 259 × 144 mm |
| Weight | 2.6 kg |
| Reference standards of the components | EN 61643-11 (surge protective devices), EN 60898-1 (miniature circuit breakers), EN 61008-1 / EN 61009-1 (residual current devices) |
Installation and wiring must be carried out by qualified personnel in accordance with the applicable standards and the electrical design of the system.