4
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 use application. Using appropriate external lightning protection, the effect of a direct lightning
strike into a building can be mitigated in a controlled way, and the lightning current can be discharged into the
ground.
Installation of SPDs to protect the inverter against mechanical damage and excessive stress include a surge
arrester in case of a building with external lightning protection system (LPS) when separation distance is kept.
To protect the DC system, surge suppression device (SPD type2) should be fitted at the inverter end of the
DC cabling and at the array located between the inverter and the PV generator, if the voltage protection level
(VP) of the surge arresters is greater than 1100V, an additional SPD type 3 is required for surge protection for
electrical devices.
To protect the AC system, surge suppression devices (SPD type2) should be fitted at the main incoming point
of AC supply (at the consumer’s cutout), located between the inverter and the meter/distribution system; SPD
(test impulse D1) for signal line according to EN 61632-1. All DC cables should be installed to provide as short
a run as possible, and positive and negative cables of the string or main DC supply should be bundled
together.
Avoiding the creation of loops in the system. This requirement for short runs and bundling includes any
associated earth bundling conductors. Spark gap devices are not suitable to be used in DC circuits once
conducting; they won’t stop conducting until the voltage across their terminals is typically below 30 volts.
3. About Product
3.1 About Inverter
This series inverters cover 7kW systems up to 10.5kW and are integrated with 3 MPP trackers with high
efficiency and reliability. The product should not be installed in multiple phase combinations.
3.2 Basic Features
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Advanced DSP control technology.
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Utilizes the latest high-efficiency power component.
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Optimal MPPT technology.
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Three independent MPP trackers.
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Wide MPPT input range.
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Advanced anti-islanding solutions.
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IP65 protection level.
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Max. Efficiency up to 97.4%. EU efficiency up to 96.8%. THD<3%.
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Safety & Reliability: Transformerless design with software and hardware protection.
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Export limitation (CT/Meter/DRM0/ESTOP).
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Power factor regulation. Friendly HMI.
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LED status indications.
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LCD display technical data, human-machine interaction through touch key.
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PC remote control.
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Upgrade through USB interface.
Summary of Contents for Force 10.5S
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