Cable Installation And The Ul Standards; Cable And Motor Insulation Checks; Motor Cable Insulation Checks; Mains Cable Insulation Checks - Honeywell NX series User Manual

Cable installation and the UL standards

6.1.3
To meet the UL (Underwriters
minimum heat-resistance of +60/75 C must be used.
The tightening torques of the terminals are given in Table 6-4.
Type
NX5 0003—0012
NX5 0016—0031
NX5 0038—0061
NX5 0072—0105
NX5 0140
NX5 0168—0205
Table 6-4. Tightening torques of terminals
* Tightening torque of terminal connection to the isolative base in Nm/in-lbs.

Cable and motor insulation checks

6.1.4

1. Motor cable insulation checks

Disconnect the motor cable from terminals U, V and W of the frequency converter 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 >1M .

2. Mains cable insulation checks

Disconnect the motor cable from terminals L1, L2 and L3 of the frequency converter and from
the mains. 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 >1M .
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 1000 V. The insulation
resistance must be >1M .
Cabling and connections
Laboratories) regulations, a UL-approved copper cable with a
Frame Tightening torque
[Nm]
FR4 0.5—0.6
FR5 1.2—1.5
FR6 4
FR7 10
FR8 20/9*
FR8 40/22*
Tightening torque
in-lbs.
4—5
10—13
35
85
170/76*
340/187*
39(86)
6