Application Examples; Hvac Application Examples; Star/Delta Starter Or Soft Starter Not Required; Start/Stop - Danfoss VLT DriveMotor FCP 106 Design Manual

Application Examples

4 Application Examples

4.1 HVAC Application Examples

4.1.1 Star/Delta Starter or Soft Starter not
Required
When larger motors are started, it is necessary in many
countries to use equipment that limits the start-up current.
In more traditional systems, a star/delta starter or soft
starter is widely used. Such motor starters are not required
if a drive is used.
As shown in Illustration 4.1, a drive does not consume
more than rated current.
800
700
600
500
400
300
200
100
1
0
0 12,5
1 VLT ®
DriveMotor
2 Star/delta starter
3 Soft starter
4 Start directly on mains
Illustration 4.1 Start-up Current
MG03M302
Design Guide
4
3
2
25 37,5 50Hz
Full load
& speed
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4.1.2 Start/Stop

Terminal 18 = Start/stop parameter 5-10 Terminal 18 Digital
Input [8] Start.
Terminal 27 = No operation parameter 5-12 Terminal 27
Digital Input [0] No operation (Default [2] Coast inverse).
Parameter 5-10 Terminal 18 Digital Input = [8] Start
(default).
Parameter 5-12 Terminal 27 Digital Input = [2]
Coast inverse (default).
20 27 29 42
45
2
3
1 Start/stop
2 Speed
3 Start/stop [18]
Illustration 4.2 Start/Stop and Running Speed
50
53 54 55
12 18 19
1
39
4 4