Solar Pump Inverter Chapter 3 System Collection Diagram
17
4)External DC electric reactor connecting terminal P1 (+): for external DC reactor to
45Kw and above power inverter, get rid off the connector between P1 (+) terminal
during installation, reactor is installed between the 2 terminal.
5)Inverter output side U V W: the output side cannot connect capacitor or surge
absorber, otherwise it will affect inverter in self-protection frequently or damage.
6)In case the motor cable is too long, it may generate electrical resonance easily due to
the impact of distributed capacitance, thus damaging the motor insulation or generating
higher leakage current to invoke over current protection of the inverter. When the length
of motor cables longer than 100 meters, it needs to install a AC output reactor.
7)Earth terminal PE:
This terminal shall be earthed reliably, with resistance of earth cable of less than
10Ω.Otherwise, it may cause fault or damage the inverter.
Do not share the earth terminal with zero line R,S,T terminal, otherwise it will result
equipment abnormal running or damage.
3.1.3 Control Circuit Terminal
Terminal Description
DI1～DI5
ON-OFF signal input, optical coupling with PW and COM.
Input voltage range: 9~30V
Input impedance: 3.3kΩ
PW
External power supply. +24V terminal is connected to PW terminal as
default setting. If user need external power supply, disconnect +24V
terminal with PW terminal and connect PW terminal with external power
+24V
Provide output power supply of +24V.
Maximum output current: 150mA
AIN
Analog input, 0~10V/ 0~20mA
GND
Common ground terminal of analog signal and +10V.
GND must isolated from COM.
COM
Common ground terminal for digital signal and +24V (or external power
supply).
+10V Supply +10V for inverter.
T1A、T1B、T1C
RO1 relay output: RO1A—common; RO1B—NC; RO1C—NO.
Contact capacity: AC 250V/3A, DC 30V/1A.
T2A、T2C
RO2 relay output: RO2A—common; RO2C—NO.
Contact capacity: AC 250V/3A, DC 30V/1A.
To Next Page
