Effekta AX M2 Series, Руководство пользователя

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Innovating power.
AX M2 Series 3-5 kW | Solar inverter
4 Inverter mode and power forms
Solar inverters without a mains power supply are considered a load on the input
side against the power supply and as a generator with respect to the load on the
output side. It should be noted here that, in the output with the connection and
structure of the mains power, all safety guidelines (protection for load and
against accidental touch) are observed. The problem or a safety gap often occurs
when the inverters interrupt the reference conductor (N or PEN) by switching to
the mains mode of operation in the inverter mode. Through this, a TN-S load
network in the inverter mode suddenly becomes an IT load network. Functionally,
this status is not problematic, but, with respect to safety, it is not acceptable
when the reference conductor is lost and the protection against accidental touch
(e.g. RCD) is then ineffective.
Our AX series therefore realizes a neutral point simulation which also takes the
guideline VDE AR-E 2510-2 into account. In this, the power supply is also decoupled
by the circuit breaker when switching (mains mode -> to the inverter mode), but
a neutral point simulation also occurs at the same time through the inverter.
The protective conductor must always be connected for this purpose.
Star point grounding of the AX inverter series
Solar inverter | V1.6
Inverter mode and power forms – Page 22