SMA SC 500CP XT Service Manual - Manual (Page 7)

SMA Solar Technology AG 2 Safety
Instructions for the Protection Test of the Power-Generating Unit SCCPXT_EZE-SG-en-11 7
2.2 Safety Information
This section contains safety information 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
observe all safety information at all times.
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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 information of the module manufacturer.
• Provided live voltage is not absolutely necessary, always disconnect the following devices from voltage sources
before performing any work:
– Grid 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 devices can be reconnected.
• After disconnecting the Sunny Central from voltage sources, wait at least 15 minutes for the capacitors of the
Sunny Central to discharge completely.
• Before working on the Sunny Central, make sure that all devices are completely voltage-free.
• Ground and short-circuit the device.
• 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 are live. Touching live components results in death or
serious injury.
• Prior to connecting the DC cables, ensure that the DC cables are voltage-free.
• Wear suitable personal protective equipment for all work on the product.
Danger to life from electric shock due to ground fault
If a ground fault has occurred, parts of the PV power plant that are supposedly grounded may in fact be live. Touching
incorrectly grounded parts of the PV power plant results in death or serious injuries from electric shock.
• Before working on the PV power plant, ensure that no ground fault is present.
• Wear suitable personal protective equipment for all work on the product.