Manual

FUSION Operations Manual Chapter 8: Maintenance and Inspection (Rev. 2
)
Page 8-5
• 4. Measure the isolation resistance between each pair and the frame.
Insulation resistance: Using a megohmmeter, 500 VDC, 50 Mohms or more, test the insula-
tion resistance between the motor windings and the motor case. The values should register in
excess of 50 Mohms for each winding.
FIG. 8-2-3 Motor Inspection
Motor Winding Resistance*
MOTOR SIZE Pins A - M Pins M - L Pins L - A
(M80)
5.0Ω 5.0Ω 5.0Ω
(M50)
7.8Ω 7.8Ω 7.8Ω
Tolerance + / - 10%
Resolver Winding Resistance
MOTOR SIZE Pins C - D Pins P - R Pins V - S
(M80)
20 −30 Ω 65 − 75 Ω 65 − 75 Ω
(M50)
20 −30 Ω 65 − 75 Ω 65 − 75 Ω
Resolver windings should not be “Open” or zero ohms.
Insulation Resistance
MOTOR SIZE Pins J - K Pins K - L Pins L - J
(M80)
More than 50 mega ohms at 500 VDC
(M50)