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 under
"
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
Every 8,000 operating hours
2)
Measure the insulation resistance (
⇨
Section 7.2.1.1 Page 30)
Check the power cables (
⇨
Section 7.2.1.2 Page 30)
Visually inspect the shackle/lifting rope (
⇨
Section 7.2.1.3 Page 31)
Every 16,000 operating hours
3)
Check the sensors (
⇨
Section 7.2.1.4 Page 31)
Change the lubricant (
⇨
Section 7.2.1.5 Page 31)
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 maximum measuring voltage is 1000 V.
1.
Measure winding against ground.
To do so, connect all winding ends together.
2.
Measure winding temperature sensor against ground.
To do so, connect all core ends of the winding temperature sensors together
and connect all winding ends to ground.
⇨
The insulation resistance of the core ends against ground 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 of the power cable is lower than 1 M
Ω
, the power cable
is defective and must be replaced.
NOTE
If the motor insulation resistance measured is too low, the winding 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 ground conductor and ground.
The resistance must be lower than 1
Ω.
Visual inspection
Checking the ground
conductor
2)
At least once a year
3)
At least every three years
7 Servicing/Maintenance
30 of 54
Amamix
