Safety Precautions - SMA SUNNY CENTRAL 500CP XT Installation Manual

SMA Solar Technology AG

2.2 Safety Precautions

This section contains safety precautions that must be observed at all times when working on or with the product. To
prevent personal injury and property damage and to ensure long-term operation of the product, read this section carefully
and follow all safety precautions at all times.
Danger to life from electric shock due to live voltage
High voltages are present in the live components of the Sunny Central. Touching live components results in death or
serious injury due to electric shock.
• When working in a high contact-risk environment, wear personal protective equipment.
• Do not touch any live components.
• Follow the instructions precisely.
• Observe all warning messages on the product and in the documentation.
• Observe all safety precautions of the module manufacturer.
• Provided live voltage is not absolutely necessary, always disconnect the following components from voltage
sources before performing any work on the inverter:
– Line voltage for grid feed-in
– Internal power supply
– DC voltage from the PV array
– Additional external voltages, e.g. control signals from a control room
• Ensure that no disconnected components can be reconnected.
• Wait 15 minutes after switching off the inverter before opening it. This will ensure that the capacitors are
discharged.
• Before working on the Sunny Central, check that all devices are completely voltage-free.
• Ground and short-circuit.
• Cover or isolate any adjacent live components.
Danger to life from electric shock due to live DC cables
DC cables connected to PV modules that are exposed to sunlight carry live voltage. Touching live components results
in death or serious injury.
• Wear suitable personal protective equipment for all work on the Sunny Central.
• Prior to connecting the DC cables, ensure that the DC cables are voltage-free.
Danger to life from electric shock due to ground fault
If a ground fault has occurred, parts of the PV system that are supposedly grounded may in fact be live. Touching
incorrectly grounded components results in death or serious injuries from electric shock.
• Ensure that no voltage is present before touching any components of the PV system.
• Wear suitable personal protective equipment for all work on the Sunny Central.
Danger to life from electric shock when entering the PV field
The ground-fault monitoring with GFDI, Remote GFDI or soft grounding does not provide protection from personal injury
when GFDI is activated. PV modules which are grounded with GFDI discharge voltage to ground. Entering the PV field
can result in lethal electric shocks.
• The inverter must be installed in a closed operating area.
• Before entering the PV field, switch the PV array to insulated operation.
• Ensure that the insulation resistance of the PV field is greater than 1 k Ω .
Installation Manual SCCPXT-IA-D7-en-42
2 Safety
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