GE Industrial Solutions SG Series 100 – 120 – 150 kVA Installation Guide - Manual (Page 27)

3.8.5 Setup for SG Series when functioning as frequency converter
When the SG Series is utilized for different output frequency compared to the input frequency, the
Automatic Bypass and Manual Bypass functions are disabled, therefore the Load cannot be transferred
to Utility in case of overload, short circuit, or inverter failure.
In situations where the UPS needs to be powered down for maintenance purposes, the critical Load
must also be powered down during this time, the UPS cannot be transferred to Manual Bypass,
serious damage to the Load could result.
The handle of the switch Q2 - Manual Bypass should be
removed to avoid attempts to transfer to Manual
Bypass when the UPS is being used as a frequency
converter.
As an added measure of safety the bus bar
connections BR1, BR2 and BR3 should also be
removed.
See Fig 3.8.3-2.
Fig. 3.8.5-1 Switch Q2 – Manual Bypass
NOTE !
The standard SG Series UPS may be operated at 50Hz input with 60Hz output
frequency conversion.
It is recommended that the static switch bypass be electronically blocked if the
UPS is to operated as a frequency converter in order to prevent damage to the
load.
Check with a Global Services Field Service Engineer to facilitate the parameter
change.
CAUTION !
The output transformer of the UPS is designed for 60Hz only.
Operation at 50Hz, 480V output may overheat the transformer.
The optional 5th harmonic filter is designed for 60Hz operation.
If the UPS is purchased with this internal filter it may not be operated at 50Hz
input or damage to the filter could result.
Modifications reserved Page 27/37
OPM_SGS_ISG_M10_M15_0US_V040.doc Installation Guide SG Series 100 –120 – 150 kVA