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September 2006
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 below in Table 3-9.
Table 3-9: Terminal Tightening Torques
Nominal Current
140 – 245
100 – 170
300 – 460
208 – 325
520 – 920
385 – 650
1030 – 1300
920 – 1030
1600 – 2300
1300 – 1900
Tightening torque of terminal connection to the isolative base.
Note: 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.
Cable and Motor Insulation Checks
1. Motor cable insulation checks
Disconnect the motor cable from terminals U, V and W of the inverter 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.
DC supply cable insulation checks
Disconnect the DC supply cable from terminals B- and B+ of the inverter and from DC
supply. Measure the insulation resistance between each conductor and ground.
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
1,000V.
The insulation resistance must be >1MΩ.
MN04004002E
Voltage
380 – 500V
525 – 690V
380 – 500V
525 – 690V
380 – 500V
525 – 690V
380 – 500V
525 – 690V
380 – 500V
525 – 690V
For more information visit: www.EatonElectrical.com
SPI9000 Inverter Unit FI9 – FI14 User Manual
Frame
FI9
FI10
FI12
FI13
FI14
Tightening Torque in
in-lb (Nm)
340 (40)
340 (40)
340 (40)
340 (40)
340 (40)
3-17
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