Wiring The Solar Panel Junction Boxes - Phoenix Contact UM IA RAD-SOL-SET-24 Serie Manual De Instrucciones

RAD-SOL-SET-24-...
4-26
PHOENIX CONTACT
4.12.2

Wiring the solar panel junction boxes

WARNING: Risk of electric shock at solar panels
Solar panels can produce hazardous voltages whenever exposed to sunlight. Even when
not in full sunlight.
• Therefore, when working with solar panels or connecting cables during the daytime,
cover solar panels with an opaque material.
WARNING: Risk of electric shock when fuses are installed
When carrying out any work on the solar panel, loads or battery, make sure that fuses for
the solar system are not installed in the fuse terminal blocks of the control cabinet
electronics.
• Before carrying out any work on the solar system, remove the three fuses from the
fuse terminal blocks in the control cabinet in the specified order (1. Solar panel,
2. Battery, 3. Loads). This will isolate the voltage sources from the circuit.
• Do not work on connecting cables when they are under load.
NOTE: Polarity of the solar cables and connection terminal blocks
The solar panels in the system are operated in series.
Label the solar cables clearly to prevent the poles from being mixed up (e. g., solar cable
with plus pole – red insulating tape, solar cable with minus pole – blue insulating tape*).
• Observe the polarity of the solar cables and connection terminal blocks.
• Observe the connection sequence.
* various labelling systems possible
The solar panel outlet box has a watertight cable feed-through, which simultaneously
serves as strain relief. In the connection space of the outlet boxes there are prepunched
openings.
1
3
Figure 4-15 Basic circuit diagram of the solar panel wiring
Key:
1 Solar panel outlet box 1
2 Solar panel outlet box 2
3 Solar cable (positive pole)
4 Connecting cable for outlet box 1/2
5 Solar cable (negative pole)
2
4
5
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