AD437153353153en-010301.pdf - 第7页
Application Inertia Eltwin SMC MCD 201 MCD 202 MCD 600 W ater Agitator High · · Centrifugal pump · · · · Compressor (Screw , unloaded) · · · · Compressor (Reciprocating , unloaded) High · Conveyor High · F an (damped) · …
AD437153353153en-010301 > VLT® Soft Starter 6
Application Inertia Eltwin SMC MCD 201 MCD 202 MCD 600
Water
Agitator High
· ·
Centrifugal pump
· · · ·
Compressor (Screw, unloaded)
· · · ·
Compressor (Reciprocating, unloaded) High
·
Conveyor High
·
Fan (damped)
· · · ·
Fan (undamped) High
·
Mixer High
·
Positive displacement pump High
·
Submersible pump
· · · ·
Metals & mining
Belt conveyor High
·
Dust collector
· · · ·
Grinder
· · · ·
Hammer mill High
·
Rock crusher High
·
Roller conveyor
· · · ·
Roller mill High
·
Tumbler High
·
Wire draw machine High
·
Food processing
Bottle washer
· · · ·
Centrifuge High
·
Dryer High
·
Mill High
·
Palletizer High
·
Separator High
·
Slicer
· · · ·
Pulp & paper
Dryer High
·
Re-pulper High
·
Shredder High
·
Petro-chemical
Ball mill High
·
Centrifuge High
·
Extruder High
·
Screw conveyor High
·
Transport &
machine tool
Ball mill High
·
Grinder
· · · ·
Material conveyor High
·
Palletizer High
·
Press
· · · ·
Roller mill High
·
Rotary table High
·
Lumber & wood products
Bandsaw High
·
Chipper High
·
Circular saw
· · · ·
Debarker
· · · ·
Edger
· · · ·
Hydraulic power pack
· · · ·
Planer
· · · ·
Sander High
·
Soft starter application guide:
Find the right product for your application
AD437153353153en-010301 > VLT® Soft Starter
7
Speed control Initial cost
AC drive
(VSD)
Soft starter
(SST)
Direct-on-line
(DOL)
Continuous
speed control
Start/stop
CAPEX OPEX
VSD
SST
DOL
SST
DOL
VSD
Step 2. Match your application, motor, and controls
If you selected an AC drive (VSD), read more about Danfoss
drives on drives.danfoss.com.
If you selected a soft starter, then read on.
Direct-on-line (DOL) drawbacks
• Wear on motor bearings
• Wear and tear on gearbox
• Water hammer
Select the size of the soft starter to
match both the motor and the
application.
1. Use the soft starter guide on p6 as a
starting point
2. Match the soft starter current rating
with motor full load current rating,
see p8
Soft starter motor and control guide
- select a soft starter to match
Select a soft starter that has a current
rating at least equal to the motor’s full
load current rating (see motor
nameplate) at the application start
duty (Light, Standard, heavy)
Soft starter current rating
The current rating of the soft starter
determines the maximum motor size it
is compatible with.
The current rating of the soft starter
depends on:
• The number of starts per hour
• The duration and current level of each
start
• The duration of time the soft starter is
turned off (not passing current)
between starts
Soft starter start performance
For Eltwin SMC, find information on
start performance here
For MCD 200, find information on start
performance in the Design Guide.
Find it here.
For MCD 600
• Refer to the Design Guide for
information on start performance in
different load situations
• Alternatively use the designer tool
“Winstart for MCD 600” to tailor the
selection to optimize your application.
Download Winstart for MCD 600 on
www.danfoss.com.
Interaction with controls
Designing your application also
includes interaction with controls.
The basic soft starters, Eltwin SMC and
MCD 201, depend on other
components for warning and alarms.
MCD 202 is able to signal overload,
either via digital I/O or fieldbus options.
Step 1. Determine what kind of speed control you need
Consider first, whether start/stop control or continuous speed control is required.
Then consider the scale of both initial investment and running costs.
Soft starter application guide:
Find the right product for your application
AD437153353153en-010301 > VLT® Soft Starter 8