Installation Instructions

Chapter 6 - Commissioning
Installation in an IT System
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Siemens Industry, Inc.
Smart Infrastructure
Siemens BT300 HVAC Drive
Installation Instructions
DPD01148
2019-05-29
WARNING
Ensure that the motor terminals are not connected to line voltage.
Vous assurer que les bornes du moteur ne sont pas connectés à la tension de
ligne.
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 >1 MOhm at ambient
temperature of 20°C (68°F).
2. Mains cable insulation checks
Disconnect the mains cable from terminals L1, L2 and L3 of the AC 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 >1MOhm at
ambient temperature of 20°C (68°F).
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 >1 MOhm at
ambient temperature of 20°C (68°F). Always follow the instructions of the
motor manufacturer.
Installation in an IT System
If your supply network is an IT (impedance-grounded) system, but your drive is
EMC-protected according to class C2, you must modify the EMC protection of the
drive to EMC-level C4. This is done by removing the built-in EMC jumpers, which is
outlined in the following procedure.
WARNING
Do not perform any modifications on the drive when it is connected to line
voltage.
N’effectuez aucune modification sur le le varieteur lorsqu’il est connecté à la
tension de ligne.