Electrical Installation; Electrical Installation Safety; Fuse Guidelines; Grounding - Danfoss iC7-60EA3N05-206A Operating Manual

iC7-Automation Air-cooled Enclosed Drives
Operating Guide

6 Electrical Installation

6.1 Electrical Installation Safety

OVERHEATED CABLES
Overheated cables are a fire hazard.
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Because of several possible cable installations and environmental conditions, it is important to consider local regulations and
IEC/EN standards.
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Also follow Danfoss recommendations for minimum cables.
BRANCH CIRCUIT HAZARD
Unprotected branch circuits can cause an electrical or a fire hazard.
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Internal short-circuit protection does not provide branch-circuit protection. To protect the installation, all branch circuits in
an installation, switchgear, and machines must be protected against short circuits and overcurrent according to national or
international regulations.
OVERCURRENT HAZARD
Overheated cables are a fire hazard.
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To avoid fire hazards due to overheating of cables in the installation, use overload protection. The drive system is equipped
with an internal overcurrent protection that can be used for upstream overload protection. Moreover, fuses or circuit break-
ers can be used to provide the overcurrent protection in the installation. Parallel cabling must be done in a way that minimi-
zes the risk of cable overheating due to unequal current sharing between parallel conductors. Always perform overcurrent
protection according to local regulations.
SHORT-CIRCUIT HAZARD
Unprotected drive system can cause an electrical or a fire hazard.
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Protect the drive system against short circuits. To protect the unit, use the fuses that are required by the manufacturer. The
drive system provides full short-circuit protection against a short circuit on the motor output.

6.2 Fuse Guidelines

The drive system is equipped with fast-acting AC fuses to limit the damages of the drive system.
See the fuse tables: 10.6.1 List of Fuse Size
To ensure fuse performance, make sure that available supply short-circuit current is sufficient. Check the minimum required values
(I ) at the fuse location.
SC
Frame Designations AE10, AE11, IE10, and IE11
DC fuses are preinstalled for parallel units to limit the damages of the drive system. Do not replace the DC fuses with any other
types.

6.3 Grounding

Ground the AC drive in accordance with applicable standards and directives.
Unless local wiring regulations state otherwise, the cross-sectional area of the protective grounding conductor must be at least ½
times of the phase conductor and made of the same material when the phase conductor cross-section is above 35 mm
to IEC 60364-5-54; 543.1.
The connection must be fixed.
Danfoss A/S © 2023.09
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