Protective Ground (Pe) Connection; Protective Earth Conductor - ABB EC Titanium Series Manual

4.2 Protective Ground (PE) Connection

To ensure a safe and trouble-free installation, the EC Titanium Integrated Motor and Drive must be properly grounded. Symmetrical
voltage on all three phases relative to ground is optimum and thus it is recommended that the control be supplied from a 4-wire
wye connected source. The center-tap of the supply transformer secondary should be solidly grounded per local code. The ground
wire from the source should be connected to the ground wire terminated on the EC Titanium Drive as shown below.
Warning: Be sure the system is properly grounded before applying power. Do not apply AC power before you ensure
that all grounding instructions have been followed. Electrical shock can cause serious or fatal injury.
• The ground terminal of the EC Titanium Drive should be individually connected directly to the site ground bus bar. EC
Titanium ground connections should not loop from one drive to another, or to, or from any other equipment.
• Ground loop impedance must confirm to local industrial safety regulations.
• To meet UL regulations, UL approved ring crimp terminals should be used for all ground wiring connections.
• The drive Safety Ground must be connected to system ground.
• Ground impedance must conform to the requirements of national and local industrial safety regulations and/or
electrical codes.
• The integrity of all ground connections should be checked periodically.

4.2.1 Protective Earth Conductor

The Cross sectional area of the PE Conductor must be at least equal to that of the incoming supply conductor.
The PE connection must be directly connected to ground: connection locations for each model are shown below.
Frame Size 1
4-2 Electrical Installation and Planning
Figure 4-1 PE Connection
Frame Size 2
MN448