Eletrical Tip

7/24/2019 Eletrical Tip

1/19

Electrical Tips

sophearak


2/19

Type of equipment which generated

most harmonic

Switch mode power supply

Electronic uorescent lighting ballast

VSD UPS

agnetic!cored de"ices


3/19

#omparison D$% & Star!Delta& soft starter


4/19

D$%

' direct-on-line startwith a normal squirrelcage motor gi"es appro)* +*, to -*, times ratedtorque of the motor depending on motor si.e*/earbo)es and couplings are also e)posed to high

mechanical stresses* This result is considerablewear and tear and often high maintenance costs*
http://electrical-engineering-portal.com/direct-on-line-dol-motor-starterhttp://electrical-engineering-portal.com/direct-on-line-dol-motor-starter


5/19

D$%


6/19

Star!delta

This is a starting method thatreduces the starting current andstarting torque* 0t is not possible to

use this starting method when theload torque is close to the ratedmotor torque during start


7/19

Star!delta


8/19

Soft starter

1y using the softstarter2 startingtorque can be reduced to a minimum"alue still able to start up the

conveyor belt.


9/19


10/19

3ow to use 4TD sensor with 5/,666


11/19


12/19


13/19


14/19


15/19


16/19

scale


17/19

7iring


18/19

7iring


19/19

7iring

Eletrical Tip

Documents

Transcript of Eletrical Tip