Connection Alternatives; Motor Operation; Making Sure That The Motor Is Cooled Sufficiently - Franklin Electric 226-Serie Montage- Und Betriebsanleitung

Encapsulated Submersible Motors

6 Motor operation

Surge voltage
protection
Connection
alternatives
Motor safety switch
6 Motor operation
6.1

Making sure that the motor is cooled sufficiently

10
Figure 5-12: Surge voltage protection
The motors can be used for clockwise and anti-clockwise rotation. The connection example shows the usual
circuit with a right-hand field and an anti-clockwise direction of rotation:
Figure 5-13: Direct starting
A motor safety switch (overload relay) is absolutely necessary!
Only use thermal trips of tripping categories 10A or 10, with
 tripping time < 10 s at 500 % I
 phase sensitivity,
 temperature compensation from 20 to 40 °C.
 Set the motor protection unit to the value of the operating current measured without exceeding the
rated motor current I (as indicated on the type plate).
N
 Integrate an overload protector in accordance with
IEC 60099 in the power supply (lightning safety
(5)).
Figure 5-14: Wye-delta-starting
(nominal current),
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