Santerno Sinus M, User Manual, Page: 27 / 219

3-5
Opening to access
Ground Terminal
WARNING

Use the Type 3 grounding method (Ground impedance: Below 100 Ω ) for 2S/T class
inverters.

Use the Special Type 3 grounding method (Ground impedance: Below 10 Ω ) for 4T class
inverters.

Use the dedicated ground terminal to ground the inverter. Do not use the screw in the case
or chassis, etc for grounding.
☞ Note : Grounding procedure
1) Remove the front cover.
2) Connect the Grounding wire to the ground terminal through the opening for ground
terminal as shown above. Enter the screw driver from vertical to the terminal and
secure the screw tightly.
☞ N ote : Grounding work guidance
Inverter
capacity
2S/T Class (1/3 phase 200-230Vac) 4T Class (3 phase 380-480Vac)
Wire size
Terminal
screw
Grounding
method
Wire size
Terminal
screw
Grounding
method
0.4~4.0 kW 4 mm
2
M3
Type 3
2.5 mm
2
M3
Special
Type 3
5.5~7.5 kW 6 mm
2
M4 4 mm
2
M4
11 ~ 15 kW 16 mm
2
M5 6 mm
2
M5
18.5~22 kW 25 mm
2
M6 16 mm
2
M5