FoxESS S2000 - PE Connection and Leakage Current; Surge protection devices (SPDs) for PV installation

S Series User Manual www.fox-ess.com P a g e | 4
2.2 PE Connection and Leakage Current
- The end-use application shall monitor the protective conductor by residual current operated protective
device (RCD) with rated fault current Ifn≤280mA which automatically disconnects the device in case of a
fault.
- DC differential currents are created (caused by insulation resistance and through capacities of the PV
generator). In order to prevent unwanted triggering during operation, the rated residual current of the RCD
has to be min 240mA. The device is intended to connect to a PV generator with a capacitance limit of
approx. 700nf.
WARNING!
High leakage current! Earth connection essential before connecting supply.
- Incorrect grounding can cause physical injury, death or equipment malfunction and increase
electromagnetic interference.
- Make sure that grounding conductor is adequately sized as required by safety regulations.
- Do not connect the ground terminals of the unit in series in case of a multiple installation. This product can
cause current with a DC component, Where a residual current operated protective device (RCD) or
monitoring device (RCM) is used for protection in case of direct or indirect contact, only an RCD or RCM of
type B is allowed on the supply side of this product.
For UK
- The installation that connects the equipment to the supply terminals shall comply with the requirements of
BS 7671.
- Electrical installation of PV system shall comply with requirements of BS 7671 and IEC 60634-7-712.
- No protection settings can be altered.
- User shall ensure that the equipment is so installed, designed and operated to maintain at all times
compliance with requirements of ESQCR22(1)(a).
For AU
Electrical installation and maintenance shall be conducted by licensed electrician and shall comply with Australia
National Wiring Rules.
2.3 Surge protection devices (SPDs) for PV installation
WARNING！
Over-voltage protection with surge arresters should be provided when the PV power system is
installed. The grid connected inverter is not fitted with SPDs in both PV input side and mains
side.
Lightning will cause damage either from a direct strike or from surges due to a nearby strike.
Induced surges are the most likely cause of lightning damage in majority or installations, especially in rural areas
where electricity is usually provided by long overhead lines. Surges may impact on both the PV array conduction
and the AC cables leading to the building. Specialists in lightning protection should be consulted during the end