Table of Contents
Procedure
1. Inhibit controller.
2. Disconnect power connection; in the case of terminal box design, disconnect power
supply between inverter and motor.
3. Measure the resistance between the following contacts or terminals:
– Connector size 1.0; M23:
pins U↔V, V↔W, W↔U
– Connector size 1.5; M40:
pins 4↔5, 5↔6 and 6↔4
– Terminal box:
terminals 1↔2,.2↔3 and 3↔1 and U↔V, V↔W, W↔U
4. The mean value calculated from the three measured values corresponds to twice the
phase resistance (star connection).
– Use the mean value as R
winding temperature ϑ
R
R
1
1
 [° ]
[°C] =
Â
1
9.3
Repair
It is recommended to have all repairs performed by Lenze Service.
ƒ
Delivery of spare parts is available upon request.
ƒ
BA33.0001 EN 2.0
and R
1
:
1
⋅ 255
⋅ 255
− 235
R
R
0
0
Maintenance/repair
in the following equation to calculate the
0
ϑ
Winding temperature during operation
1
R
Winding resistance at operating temperature
1
R
Winding resistance at 20°C
0
9
Repair
51
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