Danfoss VLT AutomationDrive EZ FC 321 Installation Manual page 9

VLT®AutomationDrive EZ FC 321
Installation Guide
ELECTRICAL SHOCK HAZARD - LEAKAGE CURRENT HAZARD >3.5 MA
Leakage currents exceed 3.5 mA. Failure to connect the drive properly to protective earth (PE) can result in death or serious in-
jury.
-
Ensure reinforced protective earthing conductor according to IEC 60364-5-54 cl. 543.7 or according to local safety regula-
tions for high touch current equipment. The reinforced protective earthing of the can be done with:
-
a PE conductor with a cross-section of at least 10 mm
-
an extra PE conductor of the same cross-sectional area as the original PE conductor as specified by IEC 60364-5-54 with a
minimum cross-sectional area of 2.5 mm
-
a PE conductor completely enclosed with an enclosure or otherwise protected throughout its length against mechanical
damage.
-
a PE conductor part of a multi-conductor power cable with a minimum PE conductor cross-section of 2.5 mm
(permanently connected or pluggable by an industrial connector. The multi-conductor power cable shall be installed with an
appropriate strain relief).
-
NOTE: In IEC/EN 60364-5-54 cl. 543.7 and some application standards (for example IEC/EN 60204-1), the limit for requiring
reinforced protective earthing conductor is 10 mA leakage current.
ELECTRICAL SHOCK HAZARD - LEAKAGE CURRENT
Leakage currents can exceed 5%. Failure to ground the drive properly can result in death or serious injury.
-
When the leakage currents exceed 5%, the protective earth (PE) shall be oversized by one number according to IEC/EN
60364-5-54 cl. 543.
-
Ensure that the minimum size of the ground conductor complies with local safety regulations.
ELECTRICAL SHOCK AND FIRE HAZARD - RCD COMPLIANCE
The unit can cause a DC fault current in the PE conductor. Failure to use a Type B residual current-operated protective device
(RCD) may lead to the RCD not providing the intended protection and therefore may result in death, fire, or other serious hazard.
-
When an RCD is used for protection against electrical shock or against fire, only a Type B device is allowed on the supply side.
Other precautions
THERMISTOR INSULATION
Risk of personal injury or equipment damage.
-
To meet PELV insulation requirements, use only thermistors with reinforced or double insulation.
EXCESSIVE HEAT AND PROPERTY DAMAGE
Overcurrent can generate excessive heat within the drive. Failure to provide overcurrent protection can result in risk of fire and
property damage.
-
Other protective devices such as short-circuit protection or motor thermal protection between drive and motor are required
for applications with multiple motors.
-
Input fusing is required to provide short circuit and overcurrent protection. If fuses are not factory-supplied, the installer
must provide them. See
8 | Danfoss A/S © 2021.05
W A R N I N G
2
(14 AWG) (mechanical protected) or 4 mm
W A R N I N G
W A R N I N G
C A U T I O N
N O T I C E
4.11 Fuses and Circuit Breakers
2 2
(8 AWG) Cu or 16 mm (6 AWG) Al
for fuse specifications.
Safety Instructions
2
(12 AWG) (not mechanical protected).
2
(14 AWG)
AN354546796134en-000201 / 130R0954