Vacon 10, Полное руководство пользователя

Страница: 32 / 102

installation vacon
•
29
24-hour support (0)201 212 575 • Email: vacon@vacon.com
3
3.2.6 Stripping lengths of motor and mains cables
Figure 3.14: Stripping of cables
Note! Strip also the plastic cover of the cables for 360 degree earthing. See Figures
Vacon 10 power connections, MI1, Vacon 10 power connections, MI2 - MI3 and Install
the control cables. MI1 - MI3. See Chapter 6.2
3.2.7 Cable installation and the UL standards
To meet the UL (Underwriters Laboratories) regulations, a UL-approved copper ca-
ble with a minimum heat-resistance of +60 / 75°C must be used.
3.2.8 Cable and motor insulation checks
These checks can be performed as follows if motor or cable insulations are suspect-
ed to be faulty.
1. Motor cable insulation checks
Disconnect the motor cable from terminals U / T1, V / T2 and W / T3 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 >1 MOhm.
2. Mains cable insulation checks
Disconnect the mains cable from terminals L1, L2 / N and L3 of the frequency con-
verter and from the mains. Measure the insulation resistance of the mains cable be-
tween each phase conductor as well as between each phase conductor and the
protective ground conductor. The insulation resistance must be >1 MOhm.
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 >1 MOhm.
20 mm
35 mm
8 mm
Earth conductor
8 mm