SMA SC 200 Installation - Manual (Page 10)

Safety SMA Solar Technology AG
10 SC20_25_35-IEN094521 Installation Guide
2.2.2 Installation
Observe the installation conditions for the Sunny Central (separate document). The describe what you
must bear in mind when installing the Sunny Central.
An electrical service room is ideal for installation of the Sunny Central, to achieve optimal noise and
fire protection.
The Sunny Central was designed for use in industrial environments in terms of the EMC thresholds
(EMC = Electromagnetic Compatibility).
Note the following points when installing the Sunny Central:
• The inlet and exhaust ventilation systems for the Sunny Central must be separate to any other
ventilation, in order to minimize smoke distribution in case of fire.
• A sufficient escape route must be guaranteed.
• The EMC specifications must be observed (see technical data).
2.2.3 Special Hazards of Photovoltaic Systems
Photovoltaic systems in particular have some special hazards. They are described below:
• An active power source is connected. Depending on the operating mode, there may be voltage
present from the photovoltaic generator and the Sunny Central. This is especially important to
note when disconnecting particular parts of the system
• As a result of the very high DC voltages, arcing may occur if fuses and plugs are used
incorrectly.
• The short circuit current of the photovoltaic generator is only slightly higher than the maximum
operating current and also depends on irradiation conditions. If a short-circuit occurs in the
system, the available fuses are not guaranteed to switch off.
• A highly complex generator array may be difficult to disconnect if a fault develops (e.g. short
circuit). We recommend additional external DC circuit breakers, which disconnect the inverter,
the main DC lines and the Sunny String-Monitors (DC switches are available as an option).
2.2.4 Working on the Sunny Central
Work may only be performed on the Sunny Central when it is disconnected. Observe the following
safety rules when working on the Sunny Central:
1. Disconnect
2. Ensure that the device cannot be reconnected
3. Ensure that no voltage is present in the system
4. Ground and short-circuit if necessary
Smoke detector
We recommend that you install smoke detectors in the service room to deactivate the
Sunny Central if smoke develops. Incorporate the smoke detector in the Emergency Stop
circuit.