For Your Information; Making The Electrical Motor Connection - Franklin Electric 226-Serie Montage- Und Betriebsanleitung

For your information

5.5

Making the electrical motor connection

DANGER
Energy supply by
generator
Fusing and motor
protection
Minimum insulation resistance (500 VDC; 1 min.; 20°C) with extension cable:

for a new motor > 4 MΩ

for a used motor > 1 MΩ
Minimum insulation resistance (500 VDC; 1 min.; 20°C) without extension cable:

for a new motor > 400 MΩ

for a used motor > 20 MΩ
Danger to life due to electrocution!
 Prior to making the electrical motor connection make sure that there is no more voltage on the entire
plant and that nobody can accidentally switch on the voltage again while the work is being carried
out.
Observe the instructions on the motor type plate and dimension the electrical system accordingly. The
connection examples in this chapter concern the actual motor and do not serve as recommendation for the
upstream control elements.

All action steps of the previous chapter have been carried out properly
Note
We urgently recommend that you discuss the plant dimensions with the generator manufacturer.
The voltage tolerance –10 % to +6 % -50Hz and +/-10% - 60Hz motors (on the motor terminals) and the
deviation of a motor current from the mean value of all three currents must not be more than 5 %.
 Generator selected on the basis of the motor start behaviour, i.e. starting current with a mean cos φ of
0.5

Sufficient continuous generator power available

Voltage at start at least 55 % of the nominal voltage

You must follow the following switch-on sequences unconditionally:
first switch on the generator and then the motor.
first switch off the motor and then the generator.
U = black
V = grey (blue)
W = brown
Figure 5-10: Fusing and motor protection
Encapsulated Submersible Motors
5 Putting the motor into use
 Provide an external mains switch (1) enabling the
voltage to be removed from the system.
 Provide fuses (2) for every single phase on site.

Provide a motor starting and protection switch (3)
(see connection alternatives)
 Provide an emergency stop system, if required for
your specific application.
 Ground the motor (4)
(exterior grounding possible with all motors)
9