Disconnecting The Inverter From Voltage Sources - SMA SUNNY BOY 3.0-US Instructions D'installation

SMA Solar Technology AG
8

Disconnecting the Inverter from Voltage Sources

Prior to performing any work on the inverter, always disconnect it from all voltage sources as
described in this section. Always adhere to the prescribed sequence.
Danger to life due to electric shock when live components or DC conductors
are touched
When exposed to light, the PV array generates dangerous direct voltage. Even if the DC load-
break switch of the inverter is in the O, position, there will be dangerous direct voltage present in
the DC conductors and on the DC-in terminal block in the Connection Unit. Touching live DC
conductors results in death or lethal injuries due to electric shock.
• If an external DC disconnecting switch is available, open the external DC disconnecting
switch.
• Leave the DC-in terminal block plugged into the Connection Unit and only touch it on the
black enclosure.
Danger to life due to electric shock from destruction of the measuring device
due to overvoltage
Overvoltage can damage a measuring device and result in voltage being present in the
enclosure of the measuring device. Touching the live enclosure of the measuring device results in
death or lethal injuries due to electric shock.
• Only use measuring devices with a DC input voltage range of 600 V or higher.
Procedure:
1. Disconnect the AC circuit breaker and secure it against reconnection.
2. Set the DC load-break switch of the inverter to O.
Installation Manual
8 Disconnecting the Inverter from Voltage Sources
DANGER
WARNING
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