Measuring The Insulation Resistance - SFA Sanipump VX 50 Bedienungs- Und Installationsanleitung

Table 10: Overview of maintenance work
Maintenance interval
Every 4,000 operating hours
Every five years
Visual inspection
Checking the earth
conductor
16 At least once a year
7 Servicing/inspection
7.2 Servicing/inspection
SFA recommends the following regular maintenance schedule:
Maintenance work
16)
Measure the insulation resistance.
Check the power cable and float switch cable.
Visually inspect the lifting chain/rope.
Change the lubricant.
Inspect the bearings.
General overhaul
7.2.1 Inspection work
7.2.1.1 Checking the lifting chain/rope
ü The pump set has been lifted out of the pump sump and cleaned. (Applies to
installation type K only.)
1. Inspect the lifting chain/rope as well as their fasteners (shackles) for any visible
damage.
2. Replace any damaged components by original spare parts.
3. Assess the lifting chain/lifting rope/shackle in accordance with the locally
applicable regulations for lifting tackle.
4. In addition, observe the operating manual of the lifting accessories.
7.2.1.2 Checking the power cables
ü The pump set has been lifted out of the pump sump and cleaned.
1. Inspect the power cables for visible damage.
2. Replace any damaged components by original spare parts.
ü The pump set has been lifted out of the pump sump and cleaned.
1. Measure the resistance between the earth conductor and chassis ground.
The electrical 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 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.
ü The pump set has been disconnected in the control cabinet.
ü Use an insulation resistance measuring device.
ü The recommended measuring voltage is 500 V (maximum permissible voltage:
1000 V).
1. Measure the winding to chassis ground.
To do so, connect all winding ends together.
Sanipump VX 50
For details see ...
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