caprari K+ Serie Instrucciones De Servicio página 24

K..065F.. / K.T040F..
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.
GB
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
iring
- 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:
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).
ROUGH DIAGRAM FOR ELECTRIC PUMP CABLE CONNECTIONS
(For direct starter: Y connection with 3-core power cable: thermal probes and conductivity probe inserted in the electric pump on request)
L1 (R)
POWER
L2 (S)
SUPPLY
LINE
L3 (T)
Star delta starter is only available upon request and with no thermal probes and conductivity probe. For connection to the mains, follow the instructions
given in the control panel wiring diagrams.
It is OBLIGATORY to connect thermal probes for flameproof electric pumps (series - ...X...) (see section 19.1)
Electric pump cable conductor identification
24
. e V p < 1000 V
750
SAFETY
ISOLATOR
BLACK
GREY
BROWN
YELLOW / GREEN
CONDUCTIVITY
DETECTOR
COIL
U1
V1
W1
Panel connection
G/V
S
T1
T2
U1
V1
W1
L1 (R)
U2
V2
L2 (S)
W2
L3 (T)
Caprari S.p.A.