Use Of Megaflex 1000 To 1600 As Frequency Converter - ABB MegaFlex 1000 UL S1 Installation Manual

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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).
MegaFlex 1000 to 1600
!
Interconnections links
BR1, BR2 and BR3
must be removed
BR1
BR2
BR3
UPS Installation Guide / REV-A
L3
Load
L2
L1
Battery +
L1-2
BR1
2 - Bypass Utility
L2-2
BR2
L3-2
BR3
L1-1
L2-1
1 - Rectifier Utility
L3-1
Battery -