Danfoss vlt soft starter mcd 500, Инструкция по эксплуатации

Страница: 45 / 95

5.12 Soft Braking
For high inertia loads the MCD 500 can be configured for soft braking.
In this application the MCD 500 is employed with forward run and braking contactors. When MCD 500 receives a start signal (button S1), it closes the
forward run contactor (KM1) and controls the motor according to the programmed primary motor settings.
When the MCD 500 receives a stop signal (button S2), it opens the forward run contactor (KM1) and closes the braking contactor (KM2) after a delay of
approximately 2-3 seconds (KT1). KA3 is also closed to activate the secondary motor settings, which should be user programmed for the desired stopping
performance characteristics.
When motor speed approaches zero, the external shaft rotation sensor (A2) stops the soft starter and opens the braking contactor (KM2).
3
17
7HA526.
10
6
5
6
4
2
3
1
KM2
KA1 KA2 KA3 KA4 KM1
M1
15 16 25 18 17
F1
KM2 KM1
KA3 S2 KA4 A2
KT1 KT1 KT2
KM1 KM2
KM1 KM2 S1 KA1 KA1
Y1
Y2
Y1
Y2
KA1
KT2
4/T2 6/T3 E
1/L1 3/L2 5/L3
2/T1
33
34
A4 A5 A6
05
06
KA3
KA2 S3
11
1 Control voltage (model dependent) KA3 Brake relay
2 Remote control inputs KA4 Rotation sensing relay
3 Motor thermistor input (PTC only) KM1 Line contactor (Run)
4 Relay outputs KM2 Line contactor (Brake)
5 3-phase supply KT1 Run delay timer
6 Motor terminals KT2 Brake delay timer
A2 Shaft rotation sensor S1 Start contact
KA1 Run relay S2 Stop contact
KA2 Start relay S3 Reset contact
Parameter settings:
• Par. 3-3
Input A Function
• Select Motor Set Select - assigns Input A for Motor set selection
• Set starting performance characteristics using the primary motor set (parameter group 1)
• Set braking performance characteristics using the secondary motor settings (parameter group 7)
• Par. 4-7 Relay C Function
• Select Trip - assigns Trip function to Relay Output C
NB!
If the MCD-500 trips on supply frequency (Par. 16-5
Frequency
) when the braking contactor KM2 opens, modify the setting of Pars.
2-8 - 2-10.
MCD 500 Operating Instruction 5 Application Examples
MG.17.K2.02 - VLT
®
is a registered Danfoss trademark
45
5