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PLEUGER STANDARD USER INSTRUCTIONS ENGLISH 71569293 01-13

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5 ELECTRICAL CONNECTIONS

5.1 Motor

All work on the electrical system must

be performed by a qualified Electrician in accordance

with relevant local, national and international

regulations.

The connection diagrams in the following sections

show the basic structure of the connection

possibilities and the line arrangement of the mains

and motor power cable.

Detailed information about the connection of

motors and, if necessary, of control and monitoring

devices can be taken from the appropriate circuit

diagrams from the control panel manufacturer.

To ensure a good connection with the least possible

contact resistance when connecting the power lines,

the conductor ends should not be tin-plated. If the

conductor ends are tin-plated, these should be

removed. The exposed fine-strand wires must be

connected to the electrical supply with suitable

terminal screws or by crimping or soldered cable lugs.

5.1.1 Labelling of conductor ends and rotation

direction of three-phase motors

The conductor ends of the power cables are labelled

so that all three-phase motors rotate clockwise (seen

from the coupling ends and towards the shaft) when

connected to a clockwise rotating system according

to figure 5-1 to 5-5.

Counter clockwise rotation occurs if two phases of

the main connection are transposed from that shown

in the clockwise connection diagrams (compare

figures 5-7 to 5-11).

Power supply cables with round or flat cross-sections

are connected to the motor. Depending on power

consumption or if the installation circumstances are

restricted then several single core cables can be

used.

5.1.2 Single-phase motors

The direction of rotation of single-phase motors

(alternating current motors) is pre-set by the

manufacturer and cannot be changed. The rotation

direction pre-set by the manufacturer can be seen in

the data sheet. Connection can only be made using

the switching device accompanying the motor for

which the labelling of the leads can be found in figure

5-6 or 5-12.

5.1.3 Motors with one power cable

One four lead power cable is connected to the motor

for direct-on-line starting, also auto transformer

starting, starting via soft-start and soft-running-out

devices as well as for static-frequency operating

(compare figures 5-1 and 5-7), if the current load of

the leads allow it.

5.1.4 Motors with two power supply cables,

parallel connection

See attachment TI 01-04 E for the

interim solution for motors with old and new coloured

power supply cables until 01 April 2006.

When the rated current of a motor cannot be supplied

by one cable it is equipped with two parallel cables.

The connections for a motor with two power cables,

with parallel connection, as well as the colour and

letter labelling of the conductor ends, is shown in

figure 5-2 or 5-8.

5.1.5 Motors with two power supply cables,

parallel connection (open delta-connection)

See attachment TI 01-04 E for the

interim solution for motors with old and new coloured

power supply cables until 01 April 2006.

For motors with star-delta starting (figure 5-3 or 5-9),

motors whose star connection (figure 5-4 or 5-10) and

or delta connection (figure 5-5 or 5-11) is in the control

panel, as well as for motors provided with two different

voltages, two three-lead and or one three- and one

four-lead power cables are connected to the motor.

5.2 Protective measures against shock-

hazard voltage

Protective measures against shock-hazard voltages

must be taken according to IEC regulations and the

local electricity supply company ordinances.

According to IEC-regulations the protective conductor

must be connected directly to the motor on new

systems. This also applies when the unit is installed

in an inaccessible well.

If there is no earth lead on the motor, a

separate earth lead must be connected to the motor

using the earth screw supplied. This is labelled with a

symbol.

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