English (GB)
17
1.1 Insulation resistance
The table shows suggested values of insulation resistance
and the test voltage in relation to the rated voltage of the
motor.
If the rated motor voltage is
≤
500 V, the insulation
resistance must be measured at a test voltage of 500 VDC.
If the rated motor voltage is > 500 V, the insulation
resistance must be measured at a test voltage of 1000
VDC.
Note
The insulation resistance must be measured
in accordance with local regulations.
Rated voltage:
≤
500 [V]
> 500 [V]
Condition of motor and cable
[M
Ω
]
[M
Ω
]
New motor (without submersible drop cable)
200
200
Used motor which can be reinstalled in well
10
10
New motor in well
20
20
Motor in good condition in well
0.5
1
Damaged insulation
< 0.5
< 1
