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Vacon NX User Manual

Vacon NX
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Electrical cabling and connections vacon • 81
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
6
6.1.1.5 Cable selection and unit installation in accordance with the UL standards
To meet the UL (Underwriters Laboratories) regulations, use a UL-approved copper cable with a
minimum heat-resistance of +90 °C to meet the requirements.
Use Class 1 wire only.
The units are suitable for use on a circuit capable of delivering not more than 100,000 rms
symmetrical amperes, 600 V maximum, when protected by J, L or T Class fuses.
Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit
protection must be provided in accordance with the National Electric Code and any additional local
codes. Branch circuit protection provided by fuses only.
6.1.2 Drive protection – Fuses
In order to protect the drive from short-circuits and excessive loads, input line fuses must be used.
The warranty becomes void if the drive is not equipped with approriate fuses.
Depending on the drive configuration, the following types of fuse protection are recommended:
AC drive with AC supply:
Always protect the drive with fast-acting input line fuses for short-circuit protection. Also pay
attention to protection of cables!
Common DC bus:
Inverter units: Choose fuse protection according to Table 43 and Table 44.
Active Front End (AFE) units: Choose DC fuses according to Table 43 and Table 44;
Appropriate fuses for the AC supply are listed in Table 62 and Table 63, see Chapter 10.
Inverter units connected to AFE units: Choose fuses for AC supply according to Table 62 and
Table 63; NOTE! Protect each inverter unit with fuses according to Table 43 and Table 44.
DC links interconnected (e.g. 2*CH74)
In case interconnection of DC links is required, contact the manufacturer.
Brake chopper unit
See Chapter 11.
6.1.3 Fuse sizes
The fuse sizing in the tables below is based on Ferraz aR fuses. We primarily recommend you to use
these fuses or corresponding Bussman aR fuses (see Appendix 3 on page 196). Sufficient protection
against short-circuit cannot be guaranteed if other fuse types are used. Furthermore, equation of
the fuse values given in the tables below with those of other fuse manufacturers is not allowed. In
case you wish to use fuses of other fuse manufacturers, contact your nearest distributor.

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Vacon NX Specifications

General IconGeneral
Product TypeAC Drive
Control MethodScalar Control
EnclosureIP00, IP21
CommunicationEthernet
SafetySTO (Safe Torque Off)
Protection FeaturesOvercurrent, Overvoltage, Undervoltage, Overtemperature, Short Circuit
Ambient Temperature Range-10°C to +50°C (with derating above +40°C)
Cooling MethodAir-cooled, Liquid-cooled

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