NSK Megatorque PS Series - Page 351

— A-7 —
 Insulation resistance check of Motor winding
！
Caution: Disconnect the Motor from the Driver Unit when checking insulation
resistance of the Motor.
！
Caution: Checking voltage must be 500 VDC or less.
Fig A-10: Check with the Cable
Megohmmeter
Ω／
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Fig A-11: Check the Motor only
Megohmmeter
Ω／
(1)
(2)
(3)
(4)
Table A-8: Checking point
Cable connector Motor connector Result
øU – PE
(1) ↔ (9)
(U) (PE)
(1) ↔ (4)
(U) (PE)
øV – PE
(2) ↔ (9)
(V) (PE)
(2) ↔ (4)
(V) (PE)
øW – PE
(3) ↔ (9)
(W) (PE)
(3) ↔ (4)
(W) (PE)
Table A-9: Specification of Insulation resistance (Common to all type of Motor)
Specification
With cable
1 [MΩ] or over
Motor only
2 [MΩ] or over
 Visual check of the Motor and the Cables
 Check the Motor for damage.
 Check the cable for damage of the cable insulation.