3 Product Overview
SMA Solar Technology AG
Maintenance Manual
SCCP-JP-B1-WA-en-22
14
Position
Component
Description
E
SC-COM
The SC-COM is the communication unit of the inverter. The SC-COM estab-
lishes the connection between the inverter and the system operator.
F
AC disconnection unit
With the AC disconnection unit, the electrical connection between the in-
verter and MV transformer can be disconnected manually.
In the event of residual current, the AC disconnection unit disconnects the
connection between the inverter and MV transformer automatically.
G
AC contactor
The AC contactor disconnects the electrical connection between the in-
verter and MV transformer automatically.
3.3
Operating and Display Elements
3.3.1
Function of the Switches
3.3.1.1
Key Switch
The key switch is used to switch the inverter on and off.
Figure 3: Switch positions of the key switch
Position
Designation
A
Switch position
Stop
B
Switch position
Start
Switch position Start
If the key switch is turned to
Start
, a motor drive switches the DC switchgear on and the inverter switches from the
operating state "Stop" to the operating state "Grid monitoring". Provided that there is sufficient irradiation and a valid
utility grid connection, the inverter switches to feed-in operation. If there is insufficient irradiation and the input voltage
is therefore too low, the inverter remains in the operating state "Grid monitoring".
Switch position Stop
If the key switch is turned to
Stop
while the inverter is in the operating state "Grid monitoring", a motor drive switches
the DC switchgear off. The inverter switches to the operating state "Stop". If the key switch is turned to
Stop
while the
inverter is in the operating state "MPP load operation", the inverter switches to the operating state "Shutdown". Once
shutdown is complete, the AC contactor and the DC switchgear are opened automatically and the inverter switches to
the operating state "Stop".
Summary of Contents for Sunny Central 1000CP-JP
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