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 frequency converter is used.
As shown in
, a frequency converter does not
consume more than rated current.
Full load
% F
ull-load cur
ren
t
& speed
500
100
0
0
12,5
25
37,5
50Hz
200
300
400
600
700
800
4
3
2
1
175HA227.10
1 VLT
®
DriveMotor
2 Star/delta starter
3 Soft starter
4 Start directly on mains
Illustration 4.1 Start-up Current
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).
195NA446.10
18
13
12
29
27
19
32 33 20
+24V
P 5-10 [8]
P 5-12 [0]
1
2
3
1
Start/stop
2
Speed
3
Start/stop [18]
Illustration 4.2 Start/Stop and Running Speed
Application Examples
Design Guide
MG03M202
Danfoss A/S © 06/2016 All rights reserved.
47
4
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Содержание VLT DriveMotor FCP 106
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