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AC Combiner Box 20 A Single-Phase with Type 2 SPD and 300 mA Type A RCCB
AC Combiner Box 20 A Single-Phase with Type 2 SPD and 300 mA Type A RCCB
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€151.98
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€151.98
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Businesses and non-Italian private customers: purchase with 22% VAT. The 10% rate is reserved for private customers resident in Italy — find out more.
Foreign companies entitled to 0% VAT: please write to info@litio.store.
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AC Combiner Box 20 A Single-Phase with Type 2 SPD and 300 mA Type A RCCB
Alternating current combiner box for single-phase photovoltaic systems, to be installed on the AC side between the inverter output and the distribution board. Compared with the basic version it adds residual current protection, required when the inverter connection line must also be protected against earth fault currents.
Inside there are a 20 A miniature circuit breaker against overloads and short circuits, a Type 2 surge protective device (class II) against transient surges and a 300 mA Type A residual current circuit breaker. The 300 mA sensitivity is typical of protection against fire risks caused by earth leakage currents, while Type A guarantees tripping even in the presence of alternating and pulsating unidirectional fault currents, such as those that may occur downstream of electronic equipment like inverters.
Key features
Triple protection20 A circuit breaker, 300 mA residual current device and Type 2 surge arrester in a single pre-wired enclosure.
Type A RCCBIt detects alternating and pulsating unidirectional earth fault currents, suited to the presence of power electronics.
300 mA sensitivityA setting typical of protection against fire risks from leakage currents, not against direct contact.
Type 2 surge arresterIt limits transient surges of indirect atmospheric and switching origin coming from the grid.
For single-phase inverters20 A on a 230 V grid: a size suited to inverters with an indicative power output of up to about 4.6 kW.
Compact and ready to use202 × 201 × 120 mm for 1.3 kg: wall installation next to the inverter with just two line connections.
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 | Single-phase (L + N) |
| Nominal current | 20 A |
| Indicative inverter power | Up to approx. 4.6 kW (230 V, 20 A) |
| Surge protective device (type) | Type 2 SPD (class II) |
| Miniature circuit breaker (MCB) | Sì, 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 | 202 × 201 × 120 mm |
| Weight | 1.3 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.