SMA SC 200 Installation - Manual (Page 12)

Safety SMA Solar Technology AG
12 SC20_25_35-IEN094521 Installation Guide
Ground and short-circuit the unit if necessary (not on the DC side)
Ground and short-circuit the AC side. The DC side does not have to be grounded.
If necessary, cover or shield any adjacent live components
Cover or shield all adjacent live parts to prevent accidental contact.
2.2.5 General Information
Overvoltage and lightning protection
The devices have internal overvoltage protection on the AC and DC sides. However, the desired
protection level can only be achieved if a lightning protection area concept exists for the installation
building as per DIN VDE 0185-4, i.e. lightning conductors or combined surge and lightning
conductors (not included in delivery) are available at, among other locations, the building’s entrance
(transfer lightning protection area LPZ 1).
The combined overvoltage and lightning protection for the analog inputs can be ordered as an
option.
Emergency Shut-off
In photovoltaic systems with more than one Sunny Central, or additional external emergency shut-off
switches, the emergency-shut off circuits must be connected to one another. Only one Sunny Central
may supply the emergency shut-off circuit with voltage. For further information on connecting external
emergency shut-off switches, see section 6.10 ”Connecting the Emergency Shut-off” (page 71).
Ear Protection
The device fans and the power unit create elevated levels of operating noise. In addition to this, a
fault in the device can lead to very high sound levels. While in the service room, we recommend that
you wear ear protection.
Burns
Immediately after disconnecting the Sunny Central, depending on the operating conditions, certain
components can be very hot (e.g. fuses, transformer core, sine wave filter, heatsinks etc.).
When working on hot components, we recommend that you wear gloves.
Torque
The circuit diagram contains a torque list. It provides details on all relevant torques. Observe these
torques when tightening the individual threaded connections. You can also ask Sunny Central Service
what the respective torques are.
Fuse Grip
A fuse grip is supplied with the Sunny Central for removing and inserting the fuses when the power
supply is disconnected. Additional safety equipment is required if fuses are not removed or inserted
when the power supply is disconnected.