HYD 3K~6K-EP User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd。
(PGND) cables for grounding purpose.
The inverter is transformer-less, requires the positive pole and
negative pole of the PV array are NOT grounded. Otherwise it will cause
inverter failure. In the PV power system, all non current carrying metal
parts (such as: PV module frame, PV rack, combiner box enclosure,
inverter enclosure) should be connected to earth.
The PGND cables are prepared ( ≥4mm²outdoor power cables are
recommended for grounding purposes),the color of cable should be yellow-green.
Procedure:
Step 1 Remove the insulation layer with an appropriate length using a wire
stripper, as shown in Fig.4-1.
Step 2 Insert the exposed core wires into the OT terminal and crimp them by
using a crimping tool, as shown in Fig.4-1.
Step 3 Install the crimped OT terminal, flat washer using M5 screw, and
tighten the screw to a torque of 3 N.m using an Allen wrench.
Note 1: L3 is the length between the insulation layer of the ground cable and the crimped part.L4 is
the distance between the crimped part and core wires protruding from the crimped part.
Note 2: The cavity formed after crimping the conductor crimp strip shall wrap the core wires
completely. The core wires shall contact the terminal closely.
Fig.4-1 Connecting PGND cable
Note
：
L2 is 2 to 3mm longer than L1 ①
1.Screw
2.OT Terminal
3.Tapped hole
③
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