Sunny Tripower Installation Manual

SMA America, LLC 6 Electrical Connection
Installation Manual CU600-1000US-IA-en-10 35
6.6 Connecting the PV Array to the Connection Unit 1000-US
Cable requirements:
☐ The DC cables of the PV array must be designed in accordance with the installation
requirements applicable on site and for temperatures of +194°F (+90°C).
☐ The DC input and output circuits are isolated from the enclosure and that system grounding, if
required by Section 250 of the National Electrical Code
®
, ANSI/NFPA 70, is the responsibility
of the installer.
☐ The maximum cable length, which is dependent on the conductor cross-section, must be
adhered to.
☐ Cable type: copper wire
☐ Conductor cross-section: AWG 12 to AWG 6 (4 mm² to 16 mm²)
Requirements:
☐ The conduits must be correctly connected to the Connection Unit (see Section 6.3).
☐ The DC switch-disconnector must be switched OFF and the lid must be dismantled.
Procedure:
Connect the DC cables of the PV array to INPUT A and B as follows:
3. Lead the DC cables of the PV array through the connected conduits into the interior of the
Connection Unit.
1.
Danger to life due to electric shock
• Make sure that all devices (e.g. inverter) connected to the Connection Unit are switched
off and protected against reconnection (see manual of the respective device).
•Cover the PV modules.
2.
Danger to life due to electric shock
The strings in the Connection Unit are combined to one main string. If there is reverse polarity
of a PV string, there can be short-circuit current flowing when string fuses are inserted, string
safety levers are closed, and the DC switch-disconnector is open.
• Open all safety levers all the way.