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MegaFlex 1000 to 1600
UPS Installation Guide / REV-A
4.9.4 Use of MegaFlex 1000 to 1600 as Frequency Converter
Note!
Permanently running the UPS without Bypass supply requires a change of internal wiring to be
performed by an ABB Service Technician only.
When the MegaFlex 1000 to 1600 is utilized for different Output Frequency compared to the Input Frequency,
the Automatic Bypass is 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.
When the set-up parameters of the UPS are set for frequency converter, the eBoost™ Operation Mode is
automatically disabled.
Fig. 4.9.4-1 MegaFlex 1000 to 1600 - Interconnection links BR1, BR2 and BR3
In order to avoid improper operation, only the Rectifier Utility input should be powered (L1-1, L2-1 and L3-1 / Fig.
4.9.1-1), therefore the interconnection links BR1, BR2 and BR3, on the input bus bars, must be removed.
See pictures above and Fig. 4.9.4-1.
Special care must be taken in choosing the fuse ratings installed in the output distribution (max. 20% of the
UPS rated current).
Avoid high inrush current due to transformer magnetization or motor starting.
Note!
Only an ABB Service Technician may change a unit from Frequency Converter into a normal UPS
(with Bypass) or a normal UPS to a Frequency Converter (with Bypass).
BR1
Interconnections links
BR1, BR2 and BR3
must be removed
L3-1
1 - Rectifier Utility
MGF_UL_1000
-1600_S1_UPS
BR1-2-3_01US
!
BR2
BR3
L2-1
L1-1
B
Battery -
L1
L2
L3
Load
2 - Bypass Utility
L3-2
BR1
BR2
BR3
L2-2
L1-2