5.13 Two Speed Motor
The MCD 500 can be configured for control of dual speed Dahlander type motors, using a high speed contactor (KM1), low speed contactor (KM2) and
a star contactor (KM3).
NB!
Pole Amplitude Modulated (PAM) motors alter the speed by effectively changing the stator frequency using external winding configu-
ration. Soft starters are not suitable for use with this type of two-speed motor.
When the soft starter receives a high speed start signal, it closes the high speed contactor (KM1) and star contactor (KM3), then controls the motor
according to the primary motor settings (par. 1-1 - 1-16.)
When the soft starter receives a low speed start signal, it closes the low speed contactor (KM2). This closes Input A and the MCD 500 controls the motor
according to the secondary motor settings (par. 7-1 - 7-16).
17
7
H
A
5
2
7.
10
2/T1
4/T2
6/T3
E
T4
T5
T6
T1
T2
T3
A6
A4
A5
1/L1
3/L2
5/L3
24
22
21
KA1
KA2
KA1
KA2
KM3
KA1
KM2
KA2
KM1
KM2
KM3
KM1
KM3
KM1
KM3
KM2
S1
KM2
KM1
KA1
F1
17
18
25
11
16
15
3
6
7
5
4
2
1
1
Control voltage
KA1
Remote start relay (low speed)
2
Remote control inputs
KA2
Remote start relay (high speed)
3
Relay outputs
KM1
Line contactor (high speed)
4
3-phase supply
KM2
Line contactor (low speed)
5
Motor terminals
KM3
Star contactor (high speed)
6
Remote low-speed start input
S1
Reset contact
7
Remote high-speed start input
21, 22, 24
Relay output B
5 Application Examples
MCD 500 Operating Instruction
46
MG.17.K2.02 - VLT
®
is a registered Danfoss trademark
5
Содержание vlt soft starter mcd 500
Страница 48: ...6 Operation MCD 500 Operating Instruction 48 MG 17 K2 02 VLT is a registered Danfoss trademark 6...
Страница 54: ...7 Programming MCD 500 Operating Instruction 54 MG 17 K2 02 VLT is a registered Danfoss trademark 7...
Страница 82: ...9 Troubleshooting MCD 500 Operating Instruction 82 MG 17 K2 02 VLT is a registered Danfoss trademark 9...
Страница 88: ...10 Specifications MCD 500 Operating Instruction 88 MG 17 K2 02 VLT is a registered Danfoss trademark 10...