8 grounding, 1 connection of ground bus bar, 2 connection of ground cable for control signals – Yaskawa G5HHP Drive User Manual

Page 67

3.8 Grounding

3 - 27

3.8 Grounding

3.8.1 Connection of Ground Bus Bar

When connecting the Inverter Panel side-by-side with an I/O terminal panel or general panel, firmly secure

the bus bar connector or cable between the ground bus bars with bolts as shown in Figure 3.21.
To avoid any troubles or accidents that might be caused by a rise in voltage to ground due to current leakage,

make sure that the bus bar is grounded before applying power.

Tightening bolt

(M8 20 mm)

Ground

bus bar

Ground bus bar

connector

415

Fig 3.21

Ground Bus Bar Connection for 400-V (600 kW) Inverters Connected

Side-by-side

3.8.2 Connection of Ground Cable for Control Signals

Separate the ground cable for control signals from the ground bus bar and apply a class-3 ground (100 Ω

or less).

2TB

(General

terminal

block)

ES terminals (two)

UKT--81

Terminal bolts: M5

Connecting wire: 14 mm

Ground cable

Fig 3.22

Connection of Ground Cable for Control Signals