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3.5 Electrical connection
3.5.1 Connection to the grid (AC output)
1) Add breaker or fuse to AC side, the specification should be more than 1.25 times of rated
AC output current.
2) The PE line of inverter should be connected to the earth, make sure the impedance of
neutral wire and earth wire less than 10 ohm.
3) Disconnect the breaker or fuse between the inverter and the utility.
4) All inverters incorporate a certified internal Residual Current Device(RCD) in order to
protect against possible electrocution and fire hazard in case of a malfunction in the PV
array, cables or inverter.There are 2 trip thresholds for the RCD as required for certification
(IEC 62109-2:2011). The default value for electrocution protection is 30mA, and for slow
rising current is 300mA.
Connect the inverter to the grid as follows:
1. Strip off L/N/PE cables as figure 3-5:
No.
Description
Remark
A
Protective layer
Diameter ranges
:
9-16mm
B
Length of stripped off
12mm
C
Insulate layer
50mm
D
Cross section of ac cables
6-10mm²
Figure 3-6 Strip off PE/N/L cables
2. Tighten the nut clockwise & Tighten L/N/PE cable screws to the terminals according to markings.
Fix (Torque: 2~2.5 N.m) the connector of AC cable to the corresponding terminals
Figure 3-7 Connect the inverter to the Grid
3. Plug Grid side connector into AC connector of inverter end, rotate and tighten clockwise.
A
C
D
B
Summary of Contents for NAC4K-DS
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