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Dahlander Motor Connection: A Simple Guide for Electrical Engineers

Motors are the backbone of modern industry, powering everything from heavy machinery to everyday appliances. Among the many types of motors, the   Dahlander motor   stands out for its ability to operate at two different speeds. Also known as a   pole-changing motor   or   two-speed motor , it achieves this by altering the number of poles in its winding configuration. In this post, we’ll break down how Dahlander motors work, their benefits, drawbacks, and where they’re commonly used      What is a Dahlander Motor? A Dahlander motor is a specialized type of  AC induction motor  designed to run at two distinct speeds. This is made possible by changing the number of poles in the stator winding. The speed of an AC motor depends on the number of poles and the supply frequency, as described by the formula: Synchronous Speed (Ns) = 120 × Frequency (f) Number of Poles (P) Synchronous Speed (Ns) = Number...
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How to wire one or two fluorescent tube lamps? How to Connect it to Electronic Ballasts?

Fluorescent lamp is a light weight mercury vapor lamp that uses fluorescence to deliver visible light.
In this blog we will learn:
1- How to wire one fluorescent tube lamp.
2- How to wire two parallel fluorescent tube lamps.
3- How to use electronic ballast to illuminate fluorescent tube lamp.


Also you can watch the whole video about wiring fluorescent tube lamps on Electrical Engineering Planet YouTube channel

Let's start with wiring one fluorescent tube lamp 

Bring the lamp, a starter, a choke coil or we can call it a ballast and a light switch.


a. Connect the line power source to one pin of the light switch.
b. Connect the other pin of the switch to one pin of the choke coil.
c. Connect the other pin of the choke coil to one terminal of the lamp.
d. Connect the adjacent terminal of the lamp to the first terminal of the starter.
e. The second terminal of the starter shall be connected to the third pen of the lamp.
f. The last pen of the lamp will be connected to neutral


for two parallel fluorescent tubes we will duplicate the ballast and the starter


a. Connect the line source to one pin of the switch.
b. The other pin will be connected to one pin of each ballast.
c. The other pin of the two ballasts will be connected to one pin of the lamps.
d. The other adjacent pin will be connected to one of each starter and the second pin of starters to the third pen of each lamp.
e. The neutral will be connected to the last pin.



If we have an electronic ballast we can connect it by following these steps

 
a. Connect the line source to one pin of a switch.
b. The other pin of the switch will be connected to the L terminal of the electronic ballast. 
c. Neutral will be connected directly to N terminal of electronic ballast.
d. Terminal one and two will be connected to the two adjacent pins of the lamp
e. Connect three and four to the other two adjacent pins of the lamp



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