Additional Connections - GE AF-650 GP Design Manual

7.7 Additional Connections

7.7.1 DC Bus Connection (only available on frequency converters with factory installed brake chopper)
The DC bus terminal is used for DC back-up, with the intermediate circuit being supplied from an external source.
Terminal numbers used: 88, 89
Please contact GE if you require further information.
7.7.2 Load Sharing(only available on frequency converters with factory installed brake chopper)
Terminal No.
88, 89
The connection cable must be screened and the max. length from the frequency converter to the DC bar is limited to 25 metres (82 feet).
Load sharing enables linking of the DC intermediate circuits of several frequency converters.
Please note that voltages up to 1099 VDC may occur on the terminals.
Load Sharing calls for extra equipment and safety considerations. For further information, please contact GE.
Please note that mains disconnect may not isolate the frequency converter due to DC link connection
Function
Loadsharing
AF-650 GP Design Guide
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