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The integral solid-state short-circuit protection does not give a branch circuit protection. Obey the National Electric Code and any
additional local codes to get the branch circuit protection. Only fuses give the branch circuit protection.
For the tightening torques of the terminals, see
12.6 Tightening Torques of the Terminals
6.1.3 Cable Selection and Dimensioning
Find the typical sizes and types of cables used with the AC drive in the tables in
12.3.1 List of Cable and Fuse Size Information
selection of cables, refer to local regulations, cable installation conditions, and cable specification.
The dimensions of the cables must comply with the requirements of the standard IEC60364-5-52.
The maximum ambient temperature is +30 °C.
The maximum temperature of the cable surface is +70 °C.
Use only motor cables with a concentric copper shield.
The maximum number of parallel cables is 9.
When using parallel cables, make sure to obey the requirements of the cable cross-sections.
For important information on the requirements of the grounding conductor, see
.
For the correction factors for each temperature, see the standard IEC60364-5-52.
6.1.4 Cable Selection and Dimensioning, North America
Find the typical sizes and types of cables used with the AC drive in the tables in
12.3.1 List of Cable and Fuse Size Information
selection of cables, refer to local regulations, cable installation conditions, and cable specification.
The dimensions of the cables must comply with the requirements of the National Electric Code (NEC) and the Canadian Electric
Code (CEC).
The maximum ambient temperature is +86 °F.
The maximum temperature of the cable surface is +158 °F.
Use only motor cables with a concentric copper shield.
The maximum number of parallel cables is 9.
When using parallel cables, make sure to obey the requirements of the cross-sectional area and the maximum number of cables.
For important information on the requirements of the grounding conductor, see the NEC and CEC.
For the correction factors for each temperature, see the instructions of NEC and CEC.
6.1.5 Fuse Selection
We recommend the fuse type gG/gL (IEC 60269-1). To make a selection of the fuse voltage rating, refer to the mains. Refer also to
local regulations, cable installation conditions, and cable specification. Do not use larger fuses than what is recommended.
External fuses in the input line are required for overload and short-circuit protection of the drive.
Find the recommended fuses in tables in
12.3.1 List of Cable and Fuse Size Information
.
Make sure that the operation time of the fuse is less than 0.4 s. The operation time agrees with the fuse type and the impedance of
the supply circuit. For more information on faster fuses, speak to the manufacturer. The manufacturer can also recommend some aR
(UL recognized, IEC 60269-4) and gS (IEC 60269-4) fuse ranges.
6.1.6 Principle of the Power Unit Topology
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Electrical Installation
VACON® NXS/NXP Air-cooled
Operating Guide
