BENSHAW ENHANCED KEYPAD Manual de usuario descargar pdf (Pagina 14)

Wound Rotor Starter

WITH MX

TECHNOLOGY - SOLID STATE STARTER WITH WOUND ROTOR CONTROL

Woundrotormotorsaretypically

usedinapplicationsrequiringhigh

startingtorques,alimitednumber

ofoperatingspeeds,orastepped

accelerationtoachieveasoftstart.

Typicalexistingapplicationsutilize

anelectromechanicalstarteronthe

statorandintroducemultiplestages

ofresistanceintherotorviacontac-

torarrangementstoachieveasoft

ramp.

WiththeMX

3

technology,wound

rotorcontrolisgreatlysimplied.

TheMX

3

technology

consistsoftwo

majorsections:1)Asolid-statesta-

torcontrol,and2)asinglestepof

resistanceintotherotorcircuitfrom

aseparate3-phaseresistorbank.

Thisachievesthehightorquere-

quiredbytheapplication—withlow

inrush—whileprovidingasmooth

steplessstart.Thisgreatlyreduces

themaintenancecostofthetypical

electromechanicalcontrol.

Key Advantages:

• BenshawMX

technology

• Singlesteprotorcontrol

• Modularpowerstackdesign

foreaseofmaintenance

• Integralbypasscontactordesign

• AdvancedMX

motor

protection

• AdvancedMX

metering

function

• Realtimeclock

• 99eventloghistory

• Modbuscapable

• Congurableoutputrelays

• Multistep&variablespeed

rotorcontrolavailable

• Reducedmaintenance

• Reducedinsizeandnumber

ofresistorsneeded

• Steplesscontrol

• Reducesinrushwhile

maintainingtorque

Single Step Rotor Control

Thesolid-statestarteriswiredtothe

motorstatorcircuit,andtheresistor

andshortingcontactorarewiredto

themotorrotorcircuit.Thesolidstate

starteracceleratesthemotortoslip

speed(determinedbytheresistance

value)andthenactivatesthecontac-

tortoshorttherotor.Thisallowsthe

motortoacceleratetofullspeed.

Multiple Step Rotor Circuit

RBWseriesstarterscanbesupplied

withmultiplestagesofrotorresistor

andcontactorcombinations.This

arrangementmaybenecessaryfor

multiplestepstartingofextremelyhigh

inertialoads,orforcontinuousopera-

tionatmultiplespeeds.Multiplesteps

ofrotorresistancecanbecoordinated

toachievethis.

Wound Rotor Starter Product Highlights:

Variable Speed Control

Variablespeedcontrolofwoundrotor

motorscanbeaccomplishedwith

theMX

3

technology



seriescontrol.

Bymaintainingfulloutputvoltageof

thecontrolgoingtothestatorofthe

woundrotormotor,andvaryingthe

resistanceintherotor,variablespeed

isaccomplished.

Resistorsmustberatedforcontinu-

ousdutyoperations.Variableloads

(pumpsandfans)only.

RATINGS

Horsepower: 20 - 1500 HP

Overload: 500% for 30 seconds

125% continuous

Starting

Torque: 0 - 100%

Voltage: 200 - 1000 Vac

Typical

Resistance

Steps: 1-2

1 2 ... 9 10 11 12 13 14 15 16

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BENSHAW ENHANCED KEYPAD Manual de usuario Pagina 14

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