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AC Combiner Box 20A Three-Phase with Type 2 SPD and 300mA Type A RCD

AC Combiner Box 20A Three-Phase with Type 2 SPD and 300mA Type A RCD

€170.48
€170.48
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  • Italy22% €207.98
  • Germany19% €202.87
  • France20% €204.57
  • Austria20% €204.57
  • Belgium21% €206.28
  • Bulgaria20% €204.57
  • Croatia25% €213.10
  • Cyprus19% €202.87
  • Czech Republic21% €206.28
  • Denmark25% €213.10
  • Estonia24% €211.39
  • Finland25.5% €213.95
  • Greece24% €211.39
  • Hungary27% €216.50
  • Ireland23% €209.69
  • Latvia21% €206.28
  • Lithuania21% €206.28
  • Luxembourg17% €199.46
  • Malta18% €201.16
  • Netherlands21% €206.28
  • Poland23% €209.69
  • Portugal23% €209.69
  • Romania21% €206.28
  • Slovakia23% €209.69
  • Slovenia22% €207.98
  • Spain21% €206.28
  • Sweden25% €213.10

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Delivery in 10-20 daysCombiner boxAC sideLitio Store

AC Combiner Box 20A Three-Phase with Type 2 SPD and 300mA 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 20A 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 300mA Type A residual current device, the sensitivity typically used for protection against fire risks caused by earth leakage currents. On a 400V three-phase grid, 20A corresponds approximately to inverters of up to about 13.8kW.

Key features

Three protections in one boxOvercurrent, earth fault and transient overvoltages handled by a single pre-wired unit.
300mA 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.
20A miniature circuit breakerProtects the three-phase line towards the main board and acts as the isolating device for the inverter.
For three-phase inverters20A on a 400V grid: suitable for inverters with an indicative power of up to about 13.8kW.
Ready to install319 × 259 × 144 mm enclosure weighing 2.6 kg, with components already fitted and internally wired.

Technical specifications

FeatureValue
Switchboard typeAC combiner box for photovoltaic systems with residual current protection
System sideAlternating current (AC), between the inverter and the distribution board
Number of poles / phasesThree-phase (3L + N)
Nominal current20A
Indicative inverter powerUp to approx. 13.8kW (400V three-phase, 20A)
Surge protective device (type)Type 2 SPD (class II)
Miniature circuit breaker (MCB)Yes, 20A
Residual current device (RCD)Yes, 300mA Type A
Dedicated isolator switchNot present: isolation is provided by the miniature circuit breaker
Dimensions319 × 259 × 144 mm
Weight2.6 kg
Reference standards of the componentsEN 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.