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VLT Ea4 Parallel Drive Modules
Operating Guide
ELECTRICAL SHOCK AND FIRE HAZARD
The drive can cause a DC current in the ground conductor. Failure to use a Type B residual current-operated protective device
(RCD) can lead to the RCD not providing the intended protection which can result in death, fire, or other serious hazard.
-
Use an RCD device.
-
When an RCD is used for protection against electrical shock or fire, use only a Type B device on the supply side.
INDUCED VOLTAGE
Induced voltage from output motor cables that run together can charge equipment capacitors, even with the equipment turned
off and locked out/tagged out. Failure to run output motor cables separately, or to use shielded cables, could result in death or
serious injury.
-
Run output motor cables separately or use shielded cables.
-
Simultaneously lock out/tag out all the drives.
ELECTRICAL SHOCK HAZARD
Due to the stray capacitance of the shielded motor cable, the leakage currents exceed 3.5 mA. Failure to properly ground the
drive can result in death or serious injury.
-
Ensure that minimum size of the ground conductor complies with the local safety regulations for high touch current equip-
ment.
-
Use a reinforced ground conductor according to IEC 60364-5-54 cl. 543.7 or local safety regulations for equipment with leak-
age current >3.5 mA.
-
For reinforced grounding:
Use a ground conductor with a cross-section of at least 10 mm
ductor of the same cross-sectional area as the original ground conductor as specified by IEC 60364-5-54, with a minimum
cross-sectional area of 2.5 mm
Use a ground conductor inside an enclosure or otherwise protected throughout its length against mechanical damage.
Use a ground conductor that is part of a multi-conductor power cable with a minimum PE conductor cross-section of
2
2.5 mm
(14 AWG) that is permanently connected or plugged in by an industrial connector. The multi-conductor power ca-
ble must be installed with an appropriate strain relief.
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.
-
Use additional protective devices such as short-circuit protection or motor thermal protection between the drive and the
motor 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.
8 | Danfoss A/S © 2023.01
W A R N I N G
W A R N I N G
W A R N I N G
2
(14 AWG) mechanically protected or 4 mm
C A U T I O N
N O T I C E
2
2
(8 AWG) Cu or 16 mm
(6 AWG) Al, or an extra ground con-
2
(12 AWG) not mechanically protected.
AQ434333248451en-000101 / 130R1286
Introduction and Safety
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