Disposal - Grundfos MS Serie Instrucciones De Instalación Y Funcionamiento

4. Insulation resistance
a) Insulation
resistance, MS
b) Insulation
resistance,
MMS

11. Disposal

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
Disconnect the submersible
drop cable from the motor-
protective circuit breaker.
Measure the insulation
resistance from each phase to
earth (frame). Make sure that
the earth connection is made
carefully.
Motors outside a well:
Clean the motor cable end.
Installed motors:
Disconnect the submersible
drop cable from the motor-
protective circuit breaker
and clean the cable end
(contact points).
Measure the insulation
resistance from each phase to
earth (frame) using an
insulation tester (500 VDC,
2 min.).
Make sure that the earth
connection is made carefully.
Subject to alterations.
If the insulation resistance is less than 0.5 MΩ, pull
out the pump assembly for motor, cable or cable
termination repair. Local regulations may specify
other values for the insulation resistance.
Check the value on the instrument.
If the insulation resistance is lower than the values
below, pull out the pump assembly for checking
and repair.
The values apply to an ambient temperature of
20 °C (68 °F).
With cable:
• new motor: 4 MΩ.
• used motor: 2 MΩ.
Without drop cable:
• new motor: 200 MΩ.
• used motor: 20 MΩ.
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