Dc Bus Connection; Load Sharing Connection; Brake Cable Connection - Danfoss VLT AQUA FC 202 Design Manual

VLT® AQUA Drive FC 202
Design Guide

10.3.3 DC Bus Connection

EMC REQUIREMENTS
According to the EMC Directive, a system is defined as a combination of several types of equipment, finished products, and/or
components combined, designed and/or put together by the same person (system manufacturer) intended to be placed on the
market for distribution as a single functional unit for an end user and intended to be installed and operated together to perform a
specific task.
The EMC directive applies to products/systems and installations, but in case the installation is built up of CE-marked products/
systems, the installation can also be considered compliant with the EMC directive. Installations shall not be CE marked.
According to the EMC Directive, Danfoss Drives as a manufacturer of product/systems is responsible for obtaining the essential
requirements of the EMC directive and attaching the CE mark. For systems involving load sharing and other DC terminals, Danfoss
Drives can only ensure compliance to EMC Directive when the end user connects combinations of Danfoss Drives products as
described in our technical documentation.
If any third-party products are connected to the load share or other DC terminals on the AC drives, Danfoss Drives cannot guaran-
tee that the EMC requirements are fulfilled.
The DC bus terminal is used for DC back-up, with the DC link being supplied from an external source.
Terminals
88, 89

10.3.4 Load Sharing Connection

EMC REQUIREMENTS
According to the EMC Directive, a system is defined as a combination of several types of equipment, finished products, and/or
components combined, designed and/or put together by the same person (system manufacturer) intended to be placed on the
market for distribution as a single functional unit for an end user and intended to be installed and operated together to perform a
specific task.
The EMC directive applies to products/systems and installations, but in case the installation is built up of CE-marked products/
systems, the installation can also be considered compliant with the EMC directive. Installations shall not be CE marked.
According to the EMC Directive, Danfoss Drives as a manufacturer of product/systems is responsible for obtaining the essential
requirements of the EMC directive and attaching the CE mark. For systems involving load sharing and other DC terminals, Danfoss
Drives can only ensure compliance to EMC Directive when the end user connects combinations of Danfoss Drives products as
described in our technical documentation.
If any third-party products are connected to the load share or other DC terminals on the AC drives, Danfoss Drives cannot guaran-
tee that the EMC requirements are fulfilled.
Load sharing links together the DC links of several drives. For an overview, see
The load sharing feature requires extra equipment and safety considerations. Consult Danfoss for ordering and installation recom-
mendations.
Terminals
88, 89

10.3.5 Brake Cable Connection

The connection cable to the brake resistor must be shielded and the maximum length from the drive to the DC bar is limited to 25
m (82 ft).
• Use cable clamps to connect the shield to the conductive backplate on the drive and to the metal cabinet of the brake resistor.
• Size the brake cable cross-section to match the brake torque.
Danfoss A/S © 2020.09
N O T I C E
Function
DC bus
N O T I C E
6.4 Load
Function
Load sharing
Electrical Installation
Considerations
Sharing.
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