KSB Etaseco C, Инструкция по установке и эксплуатации

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7.2.2.2 Cleaning filters
CAUTION
Insufficient inlet pressure due to clogged filter in the suction line
Damage to the pump!
▷
Monitor contamination of filter with suitable means (e.g. differential pressure
gauge).
▷
Clean filter in appropriate intervals.
7.2.2.3 Lubrication of plain bearings
The hydrodynamic plain bearings are lubricated by the pumped product itself during
pump operation. Bearings shall be checked for wear in the following cases:
▪
When the pump has been operated under dry running or cavitation conditions,
the bearings should be checked immediately, if possible.
▪
Vibrations, noise and an increase in current input occurring during unchanged
operating conditions indicate wear at the bearings (insufficient lubrication).
Also check the bearings. (
⇨
Section 7.4.7 Page 41)
7.2.2.4 Checking the motor winding
Measure the insulation resistance of the motor winding as part of the regular
maintenance work.
1. Disconnect (
⇨
Section 7.4.2 Page 40) the pump from the power supply. If
required, remove it from the piping.
2. Measure the insulation resistance of the motor winding against earth.
Measurement procedure (
⇨
Section 7.2.2.5 Page 37)
⇨
If resistance against earth
≧
5 M
Ω
: Motor winding in working order.
The pump can be re-installed (
⇨
Section 5.4 Page 21) and connected to the power
supply (
⇨
Section 5.6 Page 24) .
⇨
If resistance against earth < 5 M
Ω
: Measure the stator and cable separately.
Open the stator space and also check the motor winding at the winding ends of
the stator (
⇨
Section 7.4.9 Page 42).
7.2.2.5 Measuring the insulation resistance (measuring procedure)
Pump version with terminal box
✓
The pump set has been disconnected from the power supply in the terminal box.
✓
Required tools: insulation resistance measuring device
✓
Measuring voltage 1000 V DC
1. Connect the conductor strands of the three phases together and measure the
connection points of the winding against earth (1000 V DC).
2. Connect the conductor strands of the winding temperature sensor together.
3. Measure the connection points of the winding temperature sensor against earth
(1000 V DC).
4. Measure the connection points of the winding temperature sensor against the
stator winding (1000 V DC).
To do so, connect the two conductor ends of the winding temperature sensors
together and connect all stator winding ends together.
Pump version with free cable end
✓
The power cable of the pump set has been disconnected in the control cabinet.
✓
Required tools: insulation resistance measuring device
✓
Measuring voltage 1000 V DC
7 Servicing/Maintenance
Etaseco/Etaseco I 37 of 60