Eaton SLX9000 - Table 3-8: Tightening Torques of Terminals

SLX9000 Adjustable Frequency Drives User Manual
MN04003020E
For more information visit: www.eaton.com 3-15
January 2009
Cable Installation and the UL Standards
To meet the UL (Underwriters Laboratories) regulations, a UL-approved copper cable with a
minimum heat-resistance of +60/75°C must be used.
The tightening torques of the terminals are given in Table 3-8.
Table 3-8: Tightening Torques of Terminals
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The isolation standoff of the bus bar will not withstand the listed tightening
torque. Use a wrench to apply a counter torque when tightening.
Cable and Motor Insulation Checks
1. Motor cable insulation checks
Disconnect the motor cable from terminals U, V and W of the drive and from the motor.
Measure the insulation resistance of the motor cable between each phase conductor as
well as between each phase conductor and the protective ground conductor.
The insulation resistance must be >1MΩ.
2. Mains cable insulation checks
Disconnect the mains cable from terminals L1, L2 and L3 of the drive and from the
mains. Measure the insulation resistance of the mains cable between each phase
conductor as well as between each phase conductor and the protective ground
conductor.
The insulation resistance must be >1MΩ.
3. Motor insulation checks
Disconnect the motor cable from the motor and open the bridging connections in the
motor connection box. Measure the insulation resistance of each motor winding. The
measurement voltage must equal at least the motor nominal voltage but not exceed
1000V. The insulation resistance must be >1MΩ.
Frame
Tightening Torque
(Nm)
Tightening Torque
in-lbs.
MF4 .5 – .6 4 – 5
MF5 1.2 – 1.5 10 – 13
MF6 4 35
FR7 10 85
FR8 40/22
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340/187
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