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Installation Manual
SMA Solar Technology AG
DC-CMB-IA-U10-xx-en
2 Safety
2.5 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 care-
fully 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 Combiner Box. Touching live components results in death
or serious injury due to electric shock.
•
Wear personal protective equipment when working on the Combiner Box.
•
Do not touch live components.
•
Before performing any work, always disconnect the Combiner Box from voltage sources unless supply voltage is
absolutely necessary.
– Switch off the DC load-break switch in the Combiner Box.
– With power off, remove the DC fuses in the central inverter or main DC distribution box. Use the LV/HRC fuse
handle to do this.
– Only open the fuse holders when the Combiner Box is switched off.
•
Ensure that the device cannot be reconnected.
•
Ensure that no voltage is present.
•
Ground and short-circuit.
•
Cover or isolate any adjacent live components. Protective covers must always be mounted.
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 DC cables 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 when working on the Combiner Box.
Danger to life from electric shock due to ground fault
In the event of a ground fault, grounded PV systems can still be live. Touching system components that have not been
properly grounded results in death or serious injuries from electric shock.
•
Before working on the PV system, ensure that no ground fault is present.
•
Wear suitable personal protective equipment for all work on the device.
Danger to life from electric shock if the Combiner Box is damaged
If the Combiner Box is damaged, dangerous situations may arise during operation that result in death or serious
injury from electric shock.
•
Only use the Combiner Box when it is in a technically faultless condition and safe to operate.
•
Regularly check the Combiner Box for visual damage.
•
Make sure that all external safety equipment is freely accessible at all times.
•
Make sure that all safety equipment is in good working order.
