Sungrow SG250HX-20 handleiding
Handleiding
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5 Electrical Connection User Manual
- When designing a LV cabinet, must pay attention to the impact of the diffused MCCB
electric arc on the cabinet and other branch circuit MCCBs, thus the interior of the cab
inet needs to be insulated. A third-party test report of the circuit-breaking performance
of the whole machine in an event of a short-circuit on the LV side is also required. It
is recommended to adopt graduated protection to ensure that in an event of a single
short-circuit fault on the LV side of the box, the corresponding branch MCCB trips nor
mally while the general ACB does not trip.
- If PLC communication is adopted, reserve a fuse-switch disconnector or circuit breaker
inside the LV power distribution room of the box-type transformer. For the connection
to the EMU200 communication box, it is recommended to use the outdoor-type UV-
resistant multi-core copper AC cable with a core diameter of 2.5mm
2
or above and an
insulation voltage of
＞
1000V. The PLC cable connecting the EMU200 to the LV bus
of the box-type transformer should be
＜
10m.
• When Anti-PID is enabled, the AC output common mode voltage of the inverter is 906V,
and the following requirements should be met:
- The LV side winding of the transformer, AC cables, and secondary devices (includ
ing protective relay, detection and measurement instruments, and related auxiliary de
vices) must withstand the voltage to ground of at least 906 V.
- If the LV side winding is in Y shape, neutral point grounding is prohibited.
- Surge protective devices (SPD) for the AC combiner box and on the LV side of the
transformer are recommended to be connected in the "3+1" manner, as shown in the
figure below. The Min. continuous operating voltages of M1 - M4 are 680 Vac.
- The string serial communication box EMU200A requires an external power supply of
220 Vac, so a power supply port and an input port (including switches) should be re
served in the LV power distribution room of the boost transformer.
5.6.2 Requirements for OT/DT Terminal
OT/DT terminals (not included in the delivery scope) are required for fixing AC cables to the
terminal block. Purchase the OT/DT terminals according to the following requirements.
50
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Productinformatie
| Merk | Sungrow |
| Model | SG250HX-20 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 15373 MB |
