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Local safety regulations and codes of practice will
specify the minimum acceptable standard but as
a guide:
•
Couplings, belts and pulleys must be
enclosed to prevent fingers, clothing or
tools from touching moving parts.
•
Guards must be made from corrosion
resistant materials.
•
Guards in hazardous areas must be made
from non-sparking material.
•
Guards must be securely fixed.
•
Pump must not be operated with guards
removed.
3.7 ELECTRICAL CONNECTION
OF THE MOTOR
The electrical connections may only be made
when no electrical power is connected and by
qualified personnel in accordance with EN 60204
and the local regulations. Special attention must
be paid to optimal earthing of the motor; this
must be performed in accordance with the
applicable regulations in the relevant country.
Check on the name plate of the motor whether
the motor can operate from the available voltage
and frequency.
The connecting cables and the protection system
against excessive currents must be chosen
according to the data on the name plate of the
motor. The voltage drop during the starting of the
motor may not exceed 3 %.
Tighten the nuts of the connector terminals in
accordance with the torque values (Nm) stated
below:
Terminal
M4
M5
Steel
2
3.2
Copper
1
2
Do not install any washers or nuts between the
cable lugs of the motor windings and the cable
lugs of the connecting cables.
Inspect the seal of the gland. The gland must
match the diameter of the connecting cable used.
Bending of the cable beside the gland must not
allow water to penetrate. (Allow the cable to be
routed downwards when it leaves the motor.)
Connect the motor in star or delta according to
the designation on the name plate of the motor
and in accordance with the diagram that is
M6
M8
M10 M12 M16
5
10
20
35
3
6
12
20
installed in the terminal box. Do not connect the
motor if you have any doubts regarding the
interpretation of the connection diagram. If in
doubt please contact JEC. Never check the
direction of rotation of the pump when the
terminal
box
responsible for complying with the regulations
relating to electrical compatibility in the country
where the pump is installed.
The voltage and the frequency stated on the
name plate of the motor must be observed.
(Tolerance of 5 % for the voltage, and 1 % for
the frequency.)
For pumps whose power exceeds 7.5 kW, special
starting provisions must be provided (star-delta
starter, soft starter, or starting with frequency
converter).
The
installation
protection device is always mandatory.
65
50
is
open.
The
technician
of
an
overcurrent
is
12
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