Wire Types And Ratings - Xylem LOWARA SMB /SVE Series Installation, Operation And Maintenance Manual

Grounding (earthing)
DANGER: Electrical hazard
 Always connect the external protection conductor to the ground terminal before attempting to
 All the electrical equipment must be grounded (earthed); this includes the booster set and its
 Check that the protection conductor (ground) is longer than the phase conductors; in case of
 Keep the connections to the ground cable as short as possible.
 Use a cable with several strands to reduce electric noise.

4.3.4 Wire types and ratings

For the standard version with control panel, the booster set is supplied with the power cables of
the pump unit and the control cables. The booster set without control panel is supplied with the
cable for connecting the pressure sensor but without the power cables of the pump unit.
If the power cable of the pump unit and/or the control cables need to be replaced or added, refer
to the Installation, Operation and Maintenance Manual of the pump units in the Smart Pump
Range.
 All cables must comply with local and national standards in terms of section and ambient
 Use cables with a minimum heat resistance of +70°C (158°F)
 Cables must never enter into contact with the motor body, the pump unit and the piping.
 The wires connected to the power supply terminals and the fault signal relay (NO, C) must be
Power supply connection
WARNING:
 Do not make any connection to the terminal board box of the pump unit without first
 The standard version of the booster set is supplied with the power cables of the motor.
Control cables
External volt free contacts must be suitable for switching < 10 VDC.
NOTICE:
 Install the control cables separate from the power supply cables and the fault signal relay
 If the control cables are installed in parallel with the power supply cable or the fault signal
 Do not intersect the power supply cables; should this be necessary, a 90°intersection angle is
Connecting the control panel
Refer to the wiring diagram in the control panel.
Connecting the frequency converter
Refer to the Installation, Operation and Maintenance Manual of the pump units in the Smart
Pump Range.
make any other electrical connections
equipment. Check that the ground terminal is connected properly.
accidental disconnection of the power supply conductor, the protection conductor (ground)
must be the last one to detach itself from the terminal.
temperature
separated from the others by means of reinforced insulation.
disconnecting the power supply and waiting for the minimum time in Table 1.
Replace the power cable of the motor, if necessary, with a cable of a cross-section suited to
the maximum consumption of the electric motor.
cable
relay, the distance between the cables must exceed 200 mm
permitted.
en – Original instructions
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