caprari K+ Serie Betriebs- Und Wartungsanleitung Seite 28

K.M150N.. / K.M100N.. / K.W100N.. / K.d200N.. / K.M200P.. / K.d250P..
All starting equipment must always be equipped with :
1) a main knife switch with a gap of at least 3 mm between its contacts and an appropriate device to lock it in the open position;
2) a suitable thermic motor protector device calibrated for a maximum power draw no higher than 5% of the current rating indicated on the motor
data plate and with an activation time of less than 30 seconds;
3) a suitable magnetic device to protect the cables against short-circuits;
4) a suitable device to protect the electric pump against earth faults;
5) a suitable phase failure protection device;
6) a device to protect against dry runs;
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7) a voltmeter and an amperometer.
The engineer who designs the plant must make sure that the power supply system is protected against unwanted and accidental start-ups due to
the power supply suddenly returning after a blackout.The electrical connections must be made by qualified personnel in strict compliance with all
national rules of installation (Italy CEI 64-8) and according to the wiring diagrams enclosed with the control panels.
Check that the voltage and frequency values on the electric pump data plate correspond to those of the electricity main.
aTTENTION If the cables have been disconnected and re-connected, make sure to check the rotation direction again: the phases could
have been reversed. In electric pumps with channel impellers, this would overload the motor and subject it to heavy vibrations of a hydrodynamic
origin. The flow rate would also become much lower than that indicated on the data plate.
Check the power draw on each phase. Unbalances must not exceed 5%. Higher values could be caused by the motor or the electricity main. Check
the power drawn in the other two motor-main combinations, working with double phase connection changes in order to maintain the same rotation
direction.
The optimum connection is that with the least power draw difference per phase. Note that if the higher power draw is always on the same line phase,
the main cause of this unbalance will be due to the power supply.
Unless it is correctly researched and implemented, use of the INVERTER and SOFT-STARTER can damage the pumping unit. Ask for
assistance from the Caprari Technical Departments if the relative difficulties are not known.
Make sure that the cable clamp is tightened. Check that the cable clamp is tightened with an 8 Nm (0.8 Kgm) torque. In case, for
any reason whatsoever, the cable comes free from cable gland, replace the washer and fix the screws before proceeding in
remounting.
If the sheath comes off the cable, check that the joint between the two ends is perfectly insulated and protected against the damp.
The free ends of the cable must never be immersed or wetted in some way. Protect them against water absorption if necessary.
If the power cable breaks, ask for a genuine Caprari spare, complete with cable gland gasket, specifying the serial number of the electric pump and
the number and section of the conductors in the order.The specifications of any cables in addition to the standard one supplied with the electric pump
must not be inferior to those of the standard cable (contact Caprari S.p.a. and check the type of standard cable used in the sales catalogue).
aTTENTION If the cables have been disconnected and re-connected, make sure to check the rotation direction again: the phases could have
been reversed. In electric pumps with channel impellers, this would overload the motor and subject it to heavy vibrations of a hydrodynamic
origin. The flow rate would also become much lower than that indicated on the data plate.
Check the power drawn on each phase. Unbalances must not exceed 5%. Higher values could be caused by the motor or the electricity main. Check
the power drawn in the other two motor-main combinations, working with double phase connection changes in order to maintain the same rotation
direction.The optimum connection is that with the least power draw difference per phase. Note that if the higher power draw is always on the same line
phase, the main cause of this unbalance will be due to the power supply.
Check that the cable clamp is tightened with an 8 Nm (0.8 Kgm) torque. In case, for any reason whatsoever, the cable comes free
from cable gland, replace the washer and fix the screws before proceeding in remounting.
If the sheath comes off the cable, check that the joint between the two ends is perfectly insulated and protected against the damp.
The free ends of the cable must never be immersed or wetted in some way. Protect them against water absorption if necessary.
If the power cable breaks, ask for a genuine Caprari spare, complete with cable gland gasket, specifying the serial number of the electric pump and
the number and section of the conductors in the order.The specifications of any cables in addition to the standard one supplied with the electric pump
must not be inferior to those of the standard cable (contact Caprari S.p.a. and check the type of standard cable used in the sales catalogue).
General prescriptions for the use of the INVERTER
- During commissioning and/or use, the minimum frequency must not be lower than 30 Hz, with a steady voltage to frequency ratio
- Maximum acceleration ramp time - 3 seconds
- Maximum deceleration time equal to twice the maximum acceleration time.
- Maximum inverter switching frequency ≤5kHz
Ensure the following operating conditions:
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Voltage gradient
Conditions that must be met regardless of the length of the power cables.
General prescriptions for the use of the SOFT STARTER:
- The SOFT STARTER device must carry out a voltage ramp starting or a constant current starting
- The SOFT STARTER device must not carry out a current ramp starting or a torque ramp starting
- Minimum peak current Vs = 60% Vn
- Minimum peak current Is = 400% In
- Maximum acceleration ramp time - 3 seconds
- Maximum deceleration time equal to twice the maximum acceleration time
- Deceleration method either by freewheel or by voltage ramp, not by braking
- Always make sure that the soft-starter is off once the assembly start phase has completed.
In case of malfunctioning of a system featuring a soft starter of inverter start, verify, if possible, the operation of the electric pump
assembly by connecting it directly to the grid (or with another device).
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. e V p < 1000 V
caprari S.p.a.