String PV Grid-tied Inverter SPI-B-H Series (175K-250K)
User Manual
2Overview
All rights reserved ©Kehua Hengsheng Co.,
Ltd.
11
2.2.4 Dimension
Figure2-7
Inverter dimensions (unit: mm)
2.3 Working Principle
The PV string input is connected to the inverter, and the maximum power point of the PV string is
tracked through the internal 12 groups of MPPT circuits to achieve the maximum power output of the
photovoltaic string, and then the conversion of DC power to three-phase AC power is realized
through the inverter circuit. As shown in 0.
Output
EMI
filtering
R
e
la
y
s
防雷器
PV24
C
HCT
HCT
HCT
(
– )
( + )
(
– )
( + )
PV2
(
– )
( + )
PV1
C
PV23
(
– )
( + )
PWM
+
–
GND
MPPT1
MPPT12
…
L1
L2
L3
PE
Input EMI
filtering
…
…
…
…
SPD
GND
GND
D
C
s
w
itc
h
L1 L2 L3
Figure2-8
Working principle diagram
2.4 Communication Method
The inverter has multiple communication methods, including Ethernet communication, RS485
communication, WIFI/GPRS communication (optional), and PLC communication (optional). Users
can easily obtain the current system operation data of the inverter.
2.4.1 Ethernet Communication
Ethernet communication (the interface location is shown in Figure2-9) is mainly used for local area
network monitoring, which can realize the remote monitoring.
Summary of Contents for SPI-B-H Series SPI175K-B-H
Page 1: ...String PV Grid tied Inverter SPI B H Series 175K 250K User Manual...
Page 2: ......
Page 71: ...4402 00000001...
