Franklin Electric 262 Serie Manual De Instrucciones página 12

Rewindable Submersible Motors
5 Pre-Operation Checks
Fusing and motor
protection
Surge voltage
protection
Connection
alternatives
Motor safety switch
10
Starting voltage 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 = brown
V = grey (blue)
W = black
Figure 5-10: Fusing and motor protection
Figure 5-12: Surge voltage protection
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.
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); recommendation: 90 % of the nominal motor
N
current.
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)
Integrate an overload protector in accordance with
IEC 60099 in the power supply (lightning safety
(5)).
Figure 5-14: Wye-delta-starting
(nominal current),
N