Cable Installation And The Ul Standards - Vacon NXP/C 5 Series User Manual

INSTALLATION INSTRUCTIONS
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7.1

Cable installation and the UL standards

To meet the UL (Underwriters
heat-resistance of +60/75
delivering not more than 100,000 rms symmetrical amperes, 600V maximum. Use Class 1 wire only.
The tightening torques of the terminals are given in Table 7-1.
Type
NX_2 0261—0300
NX_5 0261—0300
NX_6 0125—0208
NX_5 0385—1450
NX_6 0261—1180
Table 7-1. Tightening torques of terminals
* Tightening torque of terminal connection to the isolative base in Nm/in-lbs. NOTE: This value is needed only if
the motor connection is made directly to the converter (no devices between converter and motor).
** Apply counter torque to the nut on the other side of the terminal when tightening/loosening the terminal screw
in order to avoid damage to the terminal.
24-hour support +358 (0)40 837 1150 • Email: vacon@vacon.com
Connect the cables:
Strip the motor and mains cables
Remove the protection grids for the input terminals and the
protection covers on the converter module(s).
Pull the cable through the bottom plate and fix the PE conductor
to the PE bar of the cabinet.
Connect the mains, motor and control cables into their respec-
tive terminals. Use cable lugs on the power cables. In units with
parallel cables (FR11 and FR12) make sure the cabling is fully
symmetrical.
Fix the shields of the motor cable(s) to the cabinet by using the
earthing clamps included in the delivery.
For Information on cable installation according to UL
regulations see Chapter 7.1.
Make sure that the control cable wires do not come in contact with
the electronic components of the unit or control components
inside the cabinet.
If an external brake resistor (option) is used, connect its cable to
the appropriate terminal (R+/R–). Also make sure that the con-
verter is equipped with a brake chopper (indicated in the type code
of the converter).
Check the connection of the earth cable to the motor and the
frequency converter terminals marked with PE or
Connect the separate shield of the power cable to the earth
terminals of the frequency converter, motor and the supply centre.
IMPORTANT: If an output filter (+ODU, +OSI) is used, note that the
switching frequency of the converter (parameter 2.6.9, ID601) must be
set according to the specification of the output filter. Setting too high/low
a switching frequency may damage the filter.
Laboratories) regulations, a UL-approved copper cable with a minimum
°
C must be used. The cable must be suitable for use on a circuit capable of
Frame Tightening torque
[Nm]
FR9 40/22*
FR10-14 40**
FR10-14 40**
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