Tiger Tiger Tiger
Different Starters

Starting Methods Comparison for High Voltage Cage Rotor Motor


       Starting
         mode
Comparison item

Liquid Resistor Soft Starting

Reactor Starting

Auto-Transformer Starting

High Voltage Frequency Converter (VFD Drive)

Principle

voltage drop starting

voltage drop starting

voltage drop starting

VVVF

Starting prediction

predictable

unpredictable

unpredictable

dependent to software level

Characteristics parameters

adjustable

nonadjustable

nonadjustable

adjustable

Starting current

can be adjusted to the minimal permission value

3-5 times
nonadjustable

3-4 times
nonadjustable

can be adjusted to the minimal permission value

Starting time

adjustable

nonadjustable

nonadjustable

adjustable

Controllability of starting process

controllable

uncontrollable

uncontrollable

controllable

Continual starting attempt

more than 3 times

1 time

1~2 times

more than 3 times

Current close loop control

available

no

no

available

Remote communication

available

no

no

available

Maintenance expenses

low

relatively low

relatively low, But difficult

high

Secondary impact

no

yes

yes

no

Soft stop

available

no

no

available

Motor comprehensive protection

relatively perfect

no

no

perfect

Requirement for ambient temperature

relatively low

relatively low

relatively low

high

Endurance to severe environment

relatively strong

relatively strong

relatively strong

very weak

 

Stability of starting characteristics

good

good

good

good

Pollution

no

no

no

harmonic pollution

Safety & reliability

relatively good

common

common

good

Average life time

commonly 25 years

less than 15 years

less than 15 years

less than 15 years

© 2012 WorldWide Electricals, All Rights Reserved ® . Powered By, Affity Solutions Pvt. Ltd.