Operating A Motor With A Soft Starter; Maintenance And Service; Troubleshooting; Service - Franklin Electric 6 Serie Manual De Instrucciones

Encapsulated Submersible Motors

7 Maintenance and service

6.5

Operating a motor with a soft starter

7 Maintenance and service
8

Troubleshooting

9

Service

10

Appendix

12
 Adjust the frequency converter so that the limit values for the nominal motor frequency of min. 30 Hz
and max. the value of the nominal motor frequency are observed.
 Limit any voltage peaks on the motor when using a frequency converter to the following values:
max. voltage rises 500 V/µs, max. voltage peak 1000V.
 Make sure that the running up time from 0 to 1800 rpm and the deceleration time from 1800 to 0 rpm is
maximum one second.
 Dimension the cable such that power loss due to additional filters is taken into consideration.
 Make sure that the required coolant flow speed along the motor is also observed with frequency
converter operation.
Note
When operating a motor with a soft starter, the relevant operating manual must be observed!
 Set the starting voltage of the soft starter to 55 % of the nominal voltage and set the running up and
delay times to max. three seconds.
 Bridge the soft starter after running up, using a contactor.
The motor is maintenance-free; no maintenance or service activities are necessary.
Fault
Unusual noises, problems with the true
running of the pump or the pump switching
on and off too frequently.
The pump repeatedly switches off

Repairs must only be carried out by authorised professional workshops (only use original Franklin
Electric spare parts).

Please note the additional safety instructions for submersible synchronous motors

If you have any questions or problems, please contact your dealer or contact Franklin Electric via
web: franklinwater.eu or mail to service-de@franklinwater.eu.
Page Explanation
Page A Outline drawings 6" / 8" Standard Motors
Page B Outline drawings HiTemp 75/90 Motors
Page C Motor Test Report (MTR)
Page D Cable cross-sections DOL and YD
Remedy
 Try to find the cause of the fault on the pump unit.
 Have the insulation resistance checked by a
professional (see chapter 5.4).
 If no cause can be found in the motor or the motor
cable: Have the electrical system checked.