NSK MEGATORQUE M-ESB-YSB2020AB300 - Page 333

— A-10 —
B
B
3
3
t
t
y
y
p
p
e
e
B
B
5
5
t
t
y
y
p
p
e
e
Appendix 2: How to Check Motor Condition
Insulation resistance check of Motor winding
2
2
3
3
t
t
y
y
p
p
e
e
2
2
5
5
t
t
y
y
p
p
e
e
3 Insulation resistance check of Motor winding
！
Caution: Disconnect the Motor from the Driver Unit when checking insulation
resistance of the Motor.
！
Caution: Never apply more than 500 VDC.
Figure A-11: Checking with the Cables
500V
＼
MW
(Megohmmeter)
(4)
(3)
(2)
(1)
Connector lock
(7)
(6)
(5)
Resolver cable
Motor cable
Figure A-12: Check Motor only.
500V
＼
MΩ
(Meghommeter)
11 6 1
12 7 2
13 8 3
14 9 4
15 10 5
Connector lock
Table A-13: Checking points
Cable connector Motor connector Result
øA – FG
(1) « (7)
(A+) (FG)
(5) « (13)
(A+) (FG)
øB – FG
(3) « (7)
(B+) (FG)
(10) « (13)
(B+) (FG)
øC – FG
(5) « (7)
(C+) (FG)
(15) « (13)
(C+) (FG)
øA – øB
(1) « (3)
(A+) (B+)
(5) « (10)
(A+) (B+)
øB – øC
(3) « (5)
(B+) (C+)
(10) « (15)
(B+) (C+)
øC – øA
(5) « (1)
(C+) (A+)
(15) « (5)
(C+) (A+)
Table A-14: Insulation resistance specification (Common to all Motors)
Specification
With cables
1 MW or over
Motor only
2 MW or over
4 Appearance check on Motor and Cables
l Check the Motor for damage.
l Check the Cables for cable insulation.