Vogt SSD Series, Руководство по обслуживанию, Страница: 15 / 21

Useful Tips
Useful Tips
for trouble-free operation
8.4 Pump Runs but Thermal Jumps
Possible Causes Solutions
1.- Thermal is set too low.
2.- It is difficult to turn the impeller by
hand.
•
Set the motor protection according
to the nameplate data.
•
Clean the impeller.
•
Clean the sump.
• Check that the impeller is
correctly adjusted.
1 5
3 .- The motor unit is not receiving
full voltage on all three phases.
• Check the fuses. Replace
any fuses that have tripped.
•
If the fuses are intact, report
the problem to plant
electrical personnel.
4 .- Rotational speed exceeds the
nominal.
•
Verify control board configuration.
5 .- Phase currents vary or are
too high.
•
Contact your nearest VOGT staff.
6 .- The insulation between the
phases and the ground connection
on the stator is defective.
•
Use an insulation monitoring
instrument. Check that the
insulation between phases and
between any phase and ground is
> 4 megohms with a 1,000 V DC
megohmmeter. 2.
•
If insulation is lower: Contact
VOGT technical personnel.
7 .- The pumped liquid
is too dense.
Verify that the maximum density is
1,100 kg/m3 .
•
Change to a more suitable pump.
•
Contact your nearest VOGT
personnel.