Maintenance interval
Maintenance work
For details see ...
After 10,000 operating hours
8)
Checking the sensors
Checking the mechanical seal leakage
Lubricant change
Lubrication of bearings
Every five years
General overhaul
7.2.1 Inspection work
7.2.1.1 Checking the lifting chain/rope
✓
The pump set has been pulled out of the pump sump and cleaned.
1. Inspect the lifting chain or rope as well as the attachment for any visible damage.
2. Replace any damaged components by original spare parts.
7.2.1.2 Checking the power supply cables
✓
The pump set has been pulled out of the pump sump and cleaned.
1. Inspect the power supply cables for any visual damage.
2. Replace any damaged components by original spare parts.
✓
The pump set has been pulled out of the pump sump and cleaned.
1. Measure the resistance between earth conductor and earth.
The resistance measured must be less than 1
Ω.
2. Replace any damaged components by original spare parts.
DANGER
Defective earth conductor
Electric shock!
▷
Never switch on a pump set with a defective earth conductor.
7.2.1.3 Measuring the insulation resistance
Measure the insulation resistance of the motor winding during annual maintenance
work.
✓
The pump set has been disconnected in the control cabinet.
✓
Use an insulation resistance measuring device.
✓
The maximum measuring voltage equals 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 conductor ends of the winding temperature sensors
together and connect all winding ends to earth.
⇨
The insulation resistance of the conductor 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 one of the power supply cables is less than 1 MΩ, the
cable is defective and must be replaced.
Visual inspection
Checking the earth
conductor
8)
At least every three years
7 Servicing/Maintenance
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Amarex KRT
Goodnal STP ST041 Sewage Delivery (Amarex KRT Submersible Motor Pump) Vendor Manual
Q-Pulse Id VM362
Active 29/10/2013
Page 40 of 96