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VLT Ea4 Parallel Drive Modules
Operating Guide
5 Electrical Installation
5.1 Safety Precautions
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.
-
Additional protective devices such as short circuit protection or motor thermal protection between drive and motor is re-
quired 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. Refer to the product-specific documentation for fuse specifications.
WIRE TYPE AND RATINGS
All wiring must comply with local and national regulations regarding cross-section and ambient temperature requirements. For
power connections, minimum 75 °C (167 °F) rated copper wire is recommended. Refer to the Specifications chapter.
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.
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Simultaneously lock out/tag out all the drives.
ELECTRICAL SHOCK AND FIRE HAZARD – RCD COMPLIANCE
The drive can cause a DC fault current in the PE conductor. Failure to use a Type B residual current-operated protective device
(RCD) can lead to the RCD not providing the intended protection and therefore can 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.
PROPERTY DAMAGE
Protection against motor overload is not included in the default setting. For the North American market, the ETR function pro-
vides class 20 motor overload protection in accordance with NEC. Failure to set the ETR function means that motor overload pro-
tection is not provided and property damage can occur if the motor overheats.
-
Enable the ETR function by setting parameter 1-90 Motor Thermal Protection to [ETR trip] or [ETR warning].
5.2 Electrical Requirements
The following conditions must be met for proper installation. For a list of exceptions, see
•
Maximum ambient air temperature is 40 °C (104 °F) at rated current.
•
The drive system must be assembled in clean air, according to enclosure classification.
•
Maximum voltage and current must not exceed the specified values in
•
Follow the local/country electrical code for cable sizing. See
22 | Danfoss A/S © 2023.01
N O T I C E
N O T I C E
W A R N I N G
W A R N I N G
N O T I C E
7.1 Electrical Data, 380–500 V
7.1 Electrical Data, 380–500 V
Electrical Installation
1.2
Disclaimer.
AC.
AC.
AQ434333248451en-000101 / 130R1286
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