NOTE
All maintenance, service and installation work can be carried out by KSB Service. Find
your contact in the attached "Addresses" booklet or on the Internet at
www.ksb.com/
contact
".
Never use force when dismantling and reassembling the submersible mixer.
7.2
Servicing/inspection
KSB recommends the following maintenance schedule:
Table 7: Overview of maintenance work
Maintenance interval
Maintenance work
After 8,000 operating hours
2)
Measure the insulation resistance (
Visually inspect the shackle/lifting rope (
After 16,000 operating hours
3)
Every five years
Perform a general overhaul
7.2.1 Inspection work
7.2.1.1 Measuring the insulation resistance
✓
The submersible mixer has been disconnected in the control cabinet.
✓
Use an insulation resistance measuring device.
✓
The max. measuring voltage is 1000 V.
1. Measure winding against earth.
To do so, connect all winding ends together.
2. Measure winding temperature sensor against earth.
To do so, connect all core ends of the winding temperature sensors together and
connect all winding ends to earth.
⇨
The insulation resistance of the core ends against earth must not be lower than
1 M
Ω.
If the resistance measured is lower, cable and motor resistance must be measured
separately. Disconnect the power cable from the motor for this purpose.
NOTE
If the insulation resistance for the power cable is lower than 1 MΩ, the power cable is
defective and must be replaced.
NOTE
If the insulation resistance values measured on the motor are too low, the winding
insulation is defective. The submersible mixer must not be returned to service in this
case.
7.2.1.2 Checking the power cables
1. Inspect the power cable for visual damage.
2. Replace any damaged components by original spare parts.
1. Measure the resistance between earth conductor and earth.
The resistance must be lower than 1
Ω.
Visual inspection
Checking the earth
conductor
2)
At least once a year
3)
At least every three years
7 Servicing/Maintenance
Amamix® direkt
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