Electrical Requirements For Certifications And Approvals - Danfoss VLT 380-500 V Design Manual

Considerations During Insta...

8.3 Electrical Requirements for Certifications and Approvals

The standard configuration provided in this guide (drive modules, control shelf, wire harnesses, fuses, and microswitches) is
UL and CE certified. The following conditions must be met apart from the standard configuration to obtain UL and CE
regulatory approval requirements. For a list of disclaimers, see chapter 18.1 Disclaimer.
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Use the frequency converter in a heated, indoor-controlled environment. Cooling air must be clean, free from
corrosive materials, and electrically conductive dust. See chapter 6.9 Ambient Conditions for Drive Modules for
specific limits.
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Maximum ambient air temperature is 40 °C (104 °F) at rated current.
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The drive system must be assembled in clean air, according to enclosure classification. To obtain UL or CE certifi-
cation regulatory approvals, drive modules must be installed according to the standard configuration provided in
this guide.
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Maximum voltage and current must not exceed the values provided in for the specified drive configuration.
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The drive modules are suitable for use on a circuit capable of delivering not more than 100 kA rms symmetrical
amperes at the drive nominal voltage (600 V maximum for 690 V units) when protected by fuses with the standard
configuration. Refer to chapter 8.4.1 Fuse Selection. The ampere rating is based on tests done according to UL 508C.
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The cables located within the motor circuit must be rated for at least 75 °C (167 °F) in UL-compliant installations.
The cable sizes have been provided in for the specified drive configuration.
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The input cable must be protected with fuses. Circuit breakers must not be used without fuses in the U.S. Suitable
IEC (class aR) fuses and UL (class L or T) fuses are listed in chapter 8.4.1 Fuse Selection. In addition, country-specific
regulatory requirements must be adhered to.
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For installation in the U.S., branch circuit protection must be provided according to the National Electrical Code
(NEC) and any applicable local codes. To fulfill this requirement, use UL-classified fuses.
•
For installation in Canada, branch circuit protection must be provided according to the Canadian Electrical Code
and any applicable provincial codes. To fulfill this requirement, use the UL-classified fuses.
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VLT Parallel Drive Modules
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