OPERATION AND MAINTENANCE MANUAL
ID MOTORS
PAGE: 41
CODE: CTT52 EDITION: 03 RELEASE: APRIL 2019
Subject to technical changes without prior notice
5.2
Electrical connections
WARNING
All the work must be carried out by qualified personnel and when the motors are completely stopped and isolated from the mains.
Always check that there is no voltage!
PRECAUTION
Damage to the windings
Before the connection, check the status of the insulation elements of the windings with regard to earth, since long or inappropriate
storage or transport may have caused the motor to absorb humidity, which affects the capacity for insulation.
The insulation reference values considered safe by VASCAT are as follows:
Parameters
Reference values
Recommended measurement voltage
500 V
Minimum insulation resistance with new or repaired windings
60 M
Ω
Table 21:
Insulation reference values for ID motors
If the humidity or dirt returns a value below the specified figure, the windings must be cleaned or dried until measurements in the
safe range are obtained.
WARNING
Dangerous voltage
When measuring the resistance of the winding insulation and just after the measurement, the terminals are live. Contact with any
live part may cause serious injury or even death.
Do not touch the terminals during the measurement process or immediately afterwards. Before any contact, discharge the
terminals to earth using an insulated cable.
