2 Safety
2.1 Appropriate Usage
The ZDNY Series is a PV inverter which converts the DC current of a PV
generator into AC current and feeds ir into the public grid.
Surge protection devices (SPDs) for PV installation
Over-voltage protection with surge arresters should be provided
when the PV power system installed.
The grid connected inverter is not fitted with SPDs in both PV
input side and MAINS side.
WARNING!
Lightning can cause damage either from direct strike or from surges due to a nearby
strike.
Induced surges are the more likely cause of lightning damage in the majority of
installations, especially in rural areas where electricity is usually by long overhead
lines. Surgemay be induced on both the PV array conduction and the a.c.
cables leading tothe 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 d.c. system, surge suppression device (SPD type2) should be fitted
at the inverter end of the d.c 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, a additional SPD type 3 required for surge protection for electrical
devices.
To protect the a.c system, surge suppression devices (SPD type2) should be fitted at
the main incoming point of a.c 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 61643-21.
All d.c cables should be installed to provide as short runs as possible, and positive
and negative cables of the same string or main d.c 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 d.c circuits as once conducting,they
won’t stop conducting until the voltage across their terminals is typically more th
an 30 volts.
2.2 Important Safety Instructions
• All work on the inverter must be carried out by qualified electrician.
• The appliance is not to be used by children or persons with reduced
physical sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction.
• Children should be supervised to ensure that they do not play with
the appliance.
DANGER!
DANGER TO LIFE DUE TO HIGH VOLTAGES IN THE INVERTER!
During operation, the upper lid of the enclosure and the enclosure
body may become hot.
• Only touch the lower enclosure lid during operation.
CAUTION!
DANGER OF BURN INJURIES DUE TO HOT ENCLOSURE PARTS!
• Do not stay closer than 20 cm to the inverter for any length of time.
CAUTION!
POSSIBLE DAMAGE TO HEALTH AS A RESULT OF THE EFFECTS
OF RADIATION!
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2 Safety2 Safety
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A
Electrical gridPV array
DC
Distribution
Box
AC
Distribution
Box
Inverter
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