GE 225, 300 manual 26

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 .3.8.3-2).

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

Fig. 3.8.3-2 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.

Notices for installation

SGS_225-300_UPS BR1-2-3_01

Q2

Q1	Q2
	BR1

BR2

BR3

Fig. 3.8.3-3 AC bus bars BR1, BR2 and BR3

For separate Bypass and Rectifier input configuration AC bus bars BR1, BR2 and BR3 must be removed.

OPM_SGS_ISG_M22_M30_0US_V011.doc 26/38 Installation Guide SG Series 225 & 300 kVA