ElmoMC SimplIQ Digital Servo Drives-Trombone Installation Guide - Manual (Page 29)

Trombone Installation Guide Installation
MAN-TROIG (Ver. 1.403)
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3.7.2.1.a Three-Phase Direct-to-Mains Connection Topology
Figure 6: Non-Isolated Three-Phase Connection Topology
Caution:
Do not connect VN- to PE. In a direct-to-mains connection, the VN- must not be
connected to the PE, as this will cause irreparable damage to the system.
Take care to note that in a direct-to-mains connection the Neutral point is not
the most negative voltage level. It is the mid-point level of the rectified DC bus.