Setup For Sg Series When Functioning As Frequency Converter - GE Digital Energy SG Series Installation Manual

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
interconnection links BR1, BR2 and BR3 should
also be removed.
See Fig. 3.8.3-2.
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
OPM_SGS_ISG_50K_80K_0US_V040.doc
of safety the
Fig. 3.8.5-1 Switch Q2 – Manual Bypass
Installation Guide SG Series 50 & 80 kVA
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