On-Grid & Backup Connections - Goodwe ET Series User Manual

2.4.3 On-Grid & Backup Connection
An external AC breaker is needed for the on-grid connection for isolation from the grid when
necessary.
Note: Backup function is optional for only German market, even though the hardware connector is always
there.
The requirements for the on-grid AC breaker are shown below.
Inverter model AC breaker specifications
GW5K/GW5KL-ET 25A/400V (e.g. DZ47-60 C25)
GW6.5K/GW6KL-ET 25A/400V (e.g. DZ47-60 C25)
GW8K/GW8KL-ET 32A/400V (e.g. DZ47-60 C32)
GW10K/GW10KL-ET 32A/400V (e.g. DZ47-60 C32)
Note: The absence of an AC breaker on the backup side will lead to inverter damage if an electrical short
circuit occurs on the backup side.
1. Use separate AC breakers for individual
inverters.
11 AC Breaker AC Breaker
AC Breaker
Requirement of AC cable connected to On-Grid and Back-Up side.
Make sure the inverter is totally isolated from any DC or AC power before connecting
the AC cable.
Note:
1. The neutral cable shall be blue, the line cable shall be black or brown (preferred), and the protective
earth cable shall be yellow-green.
2. For AC cables, the PE cable shall be longer than the N&L cables. This provides protection in case the AC
cable slips or is removed, the ensuring that the earth conductor will be the last cable to take the strain.
Step 1
Prepare the terminals and AC cables according to the correct table.
A
B
2. On the AC side, an individual breaker
should be connected between the
inverter and grid but before any loads.
AC breaker
Loads
Grid
C
Grade Description
A Outside diameter
D
B Separated wire length
C Conductor wire length
D Conductor core section
Step 2
Place the AC cable through the terminal cover
as shown in the figure.
Note: Please use the terminals in the accessory
box.
Step 3
Press the connectors tightly on the cable conductor core.
Note: Make sure the cable jacket is not locked within the connector.
Grid
Step 4
Use a screwing
torque of
2.0‒2.5Nm
1. Connect the assembled AC cables to AC terminals with a fastening torque of approxi-
mately 2.0-2.5 Nm.
(If the inverter has backup function)
Note:
the on-grid terminals. Make sure they are not connected to the wrong side.
2. Lock the cover and screw on the cap.
Value
13-18 mm
Special adjustable settings
20-25 mm
The inverter has a field where the user can set functions, such as trip points, trip time, time of
7-9 mm
reconnection, active and invalid of QU curve, and PU curve. These functions can be adjusted by
4-6 mm
2
using special software. If interested, please contact the after-sales department.
Screw Cap The Insulator
Single Hole AC Sheet Cover
Cables
Seal Ring
Connect the backup terminals before connecting
12