SMA SC 100LV-560HE - Manual (Page 14)

Safety SMA Solar Technology AG
14 SC125_560HE-IEN083220 Installation Guide
The disconnection of the DC voltage is carried out by the internal or external DC input fuses or, if
available, external circuit breakers. The disconnection with the DC input fuses has to be carried out
under load-free conditions.
The device contains capacitors on the DC and AC sides that discharge when the device is
disconnected. After switching off, there are dangerous accidental-contact voltages present within the
device for several minutes. If there is a fault in the device, these voltages may also remain present for
a longer period of time. For these reasons, wait a minimum of 5 minutes after switching off before
opening the device.
The Plexiglas cover must be removed in order to pull the fuses. The cover must never be removed from
both poles at the same time. After the cover has been removed from one pole, and the fuse has been
pulled, the cover must be immediately re-installed before removing the cover from the second pole.
The covers must always remain in place when fuses are not to be pulled.
DANGER!
Risk of lethal electric shock!
Dangerous accidental-contact voltages can be present in the Sunny Central even when the
main AC and DC switches are switched off!
• After switching off the Sunny Central, wait a minimum of 5 minutes.
WARNING!
Risk of lethal electric shock!
• To avoid arcing, the load-free status must be checked with a current probe (using a
clamp-on ammeter) before removing the DC input fuses. The fuses may only be
pulled/inserted using the personal protective equipment and fuse carriers.
• In the case of inserted DC fuses (internal or external), reverse voltage is applied to
all externally connected DC main distributors and sub-distributors (Sunny String
Monitor) as well as the team device via the the bus bar in the Sunny Central.
• In the event of a failure, the DC contactors may carry a life-threatening DC voltage!
• The discharge time of the capacitors is longer than 5 minutes.
Disconnection of system components without risk
In addition, we recommend the use of external DC circuit breakers for disconnecting the
inverter and/or the DC main cables / Sunny String monitors (DC circuit breakers are
optionally available). Even in the case of faults or fire, this allows system components to be
safely disconnected.