Maintenance interval
Maintenance work
After 16,000 operating hours
5)
Checking the sensors
Lubricant change (
Every five years
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.
2. Replace any damaged components by original spare parts.
DANGER
Defective earth conductor
Electric shock!
▷
Never switch on a submersible mixer with a defective earth conductor.
7.2.1.3 Checking the shackle/lifting rope
✓
The submersible mixer has been lifted out of the fluid handled and cleaned.
1. Inspect the shackle/lifting rope and all fixing elements for visual damage.
2. Replace damaged components by original spare parts.
Visual inspection
Checking the earth
conductor
Visual inspection
5)
At least every three years
7 Servicing/Maintenance
Amaprop®
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Goodnal STP ST041 Biological Treatment (KSB Amaprop Installation and Operating Manual) Vendor Manual
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