Appendix F Selection of Motor
163
App.F
b.Insulation Measurement of Drive and Motor
1. Measure the drive insulation impedance
a. Please extremely cautious the following steps to test the main circuit
insulation of drive. Any incaution operations while testing the drive insulation
may possibly harm operating personnel and cause serious damages to drive.
b. Remove all wiring at power terminal (main circuit) and control circuit terminal
before the testing is performed. Please follow the below diagram to wire all
power terminals in parallel with an insulation tester for drive insulation test.
c. Using an insulation tester with DC500V to test the insulation value of drive.
The drive insulation impedance must be greater than 20M
Ω. If drive
insulation impedance is below 20M
Ω, replace a drive and contact the
customer support for repair service of drive.
Insulation
tester
Drive
Drive Insulation Impedance Measurement
2. Measure the motor insulation impedance
a. Remove the U/T1, V/T2, W/T3 cables of motor from the drive before
measuring the motor insulation impedance, and then measure the motor
insulation impedance (including motor cables) using the insulation tester with
DC500V. The motor insulation impedance (including motor cables) must be
greater than 20M
Ω.
b. If motor insulation impedance is less than 20M
Ω, Do Not connect motor with
a drive or the drive lifetime may be shorten or the drive may be possibly
damaged due to insufficient motor insulation.
c. Please follow the below connection diagram for motor insulation test. Motor
cables must be connected in parallel to the insulation tester with DC500V to
test the insulation, and the motor insulation impedance must be greater than
20M
Ω to connect the drive.
Insulation
tester
Motor
Motor
cable
Motor Insulation Impedance Measurement (Including Motor Cables)
Summary of Contents for RM6F5 series
Page 1: ...AC MOTOR DRIVE Operation Manual RM6F5 series ...
Page 194: ...Notes 194 Notes ...
Page 195: ...Notes 195 Notes ...