en – Original instructions
24
•
Proper protective grounding for equipment with ground currents higher the 3.5 mA must be
established. See the Leakage current (>3.5 mA) section for details.
•
Keep the ground wire connections as short as possible.
•
Use high-strand wire to reduce electrical noise is recommended.
5.3 Wire type and ratings
•
All wiring must comply with local and national regulations regarding cross section and ambient
temperature requirements.
•
Use cables with a minimum heat resistance of +70°C (158°F); to obey the UL (Underwriters
Laboratories) regulations, it is recommended that all power connections be made with a
minimum 75°C rated copper wire of the following types: THW, THWN.
•
The cables never have to touch the motor housing or the pump or the pipeline.
•
Wires connected to supply terminals and fault signal relay (NO,C) must be separated from
others by reinforced insulation.
Table 7: Recommended power connections cables
e-SM Drive models
Power supply input cable + PE
Tightening torque [Nm (lbf·in)]
Wire numbers x Max.
copper section [mm
2
(in
2
)]
Wire numbers
x Max. AWG
Mains and motor
cable terminals
Earth Conductor
103, 105, 107, 111,
115
3x1.5 (3x0.0023)
3x15 Spring
connectors Spring
connectors
303, 305, 307, 311,
315, 322
4x1.5 (4x0.0023)
4 x 15
0.8 (7.1)
3 (26.6)
Control cables
External volt free contacts must be suitable for switching < 10 VDC.
NOTICE:
Control cables must be installed separate both from power supply cable and fault signal relay
cable. If control cables are installed in parallel to power supply cable or fault signal relay cable for
a longer distance, the distance between these cable should be more than 200 mm (7.9 in). Do not
cross power cables. If this is not possible, cross them only in a an angle of 90°.
Table 8: Recommended control cables
e-SM Drive control cables
Wires number x Max. copper Section
[mm
2
(in
2
)]
AWG Tightening
torque
[Nm (lbf·in)]
All I/O conductors
0.75÷1.5 (0.00012÷0.0023)
18÷16 0.6
(5.4)
5.4 Power supply connection
WARNING:
Do not make any connection in the pump control box unless the power supply has been
switched off for at least: refer to the table 12 for wait times.
