GE 225, 300 manual Cable section for this connection shall be not less then AWG

g

GE

This UPS is only designed to operate in a wye-configured electrical system with a solidly grounded neutral.

In case of 3-wire utility input the following solutions are possible:

1- Connection of a “3-wire kit” between Utility Input and Neutral of the output transformer.

Attention: With this configuration, load can only be connected phase-phase.

Absolutely no load connection permitted to the Neutral of the output transformer.

In a RPA configuration with 3-wire kit, it’s most important to connect the Neutrals of the UPS outputs together (see Fig .3.8.2-2).

Cable section for this connection shall be not less then AWG 1.

Fig. 3.8.2-2 3-wire kit for RPA Parallel System

2- Bypass transformer.

In this case the Neutral of wye secondary winding must be connected to the Neutral of the output transformer.

Contact your Service Centre, which will help you to find valuable solutions.

OPM_SGS_ISG_M22_M30_0US_V011.doc 24/38 Installation Guide SG Series 225 & 300 kVA