5.
Grid (Utility) Connection
7
www.sinetech.co.za
5.
Grid (Utility) Connection
5-1. Preparation
Before connecting to AC utility, please install a
separate
AC circuit breaker between
inverter and AC utility. This will ensure the inverter can be safely disconnected during
maintenance and is fully isolated from the AC input.
NOTE1:
Although this inverter is equipped with a 250VAC/40A fuse, install a separate
circuit breaker for safety. Use a 250VAC/40A circuit breaker between inverter and AC
utility.
NOTE2:
The overvoltage category of the AC input is III. It should be connected to a
power distribution board.
WARNING!
It's very important for system safety and efficient operation to use
appropriate cable for grid (utility) connection. To reduce risk of injury, please use the
proper recommended cable size as below. Suggested cable requirement for AC wire:
Model
5KW
Nominal Grid Voltage
230VAC
Conductor cross-section (mm
2
)
10 mm
2
AWG no.
7
5-2. Connecting to the AC Utility
Step 1: Check the grid voltage and frequency with a voltmeter. It should be the same as
“VAC” va
lue on the product label.
Step 2: Turn off the circuit breaker.
Step 3
: Remove insulation sleeve 10 mm on all three
conductors.
Shorten phase and neutral conductors to
3 mm. Refer to chart 1.
Step 4: Connect wires according to polarities
indicated on terminal block. Be sure to connect PE
protective conductor (
)
first.
L
→
LINE (brown or black)
→
Ground (yellow-green)
N
→
Neutral (blue)
Step 5: Make sure the wires are securely connected.
The tightening torque is 0.8 N.m.
Chart 2
L
N
Chart 1
