3.10 Shut-down Sequence
It is recommended to send a STOP signal to the AFE before shutting down the power.
Send Open signals to
the AFE and Mains
contactors.
AFE/Inverter Drives
Auxiliary Hardware
Actions
Control PLC
130BA775.11
End of Stop
Sequence
Stop Sequence
Wait for 1sec.
Send INV Stop signals
to all the inverters
All the inverters control
to reduce the speed
to zero, if it is not zero.
Send AFE Stop signals
to the AFE.
AFE is deactive.
DC voltage level is
down to zero
DC voltage level
is reduced.
Open the contactor.
The motor speed is
reduced to zero.
"Running" signal is off
when the speed is zero.
"Running" off?
Yes
No
Wait for 5min?
No
Protection Mode
Yes
The DC capacitor can be discharged
with the external resistor, which
expedites the discharge process.
: The wait period is tentative.
Illustration 3.20 Shut-down Sequence Flow Cart
Crane System Design
Operating Instructions
22
Danfoss A/S © Rev. 05/2014 All rights reserved.
MG33X402
3
3
Содержание VLT Active Front End AFE 302
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