Danfoss VLT Active Front End AFE 302, Руководство по эксплуатации

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3.2.4 MDCIC Connector Configuration
The MDCIC board has the four connectors. The ribbon
cables from the power units will be connected from FK100
to FK103.
For one power unit configuration, the part 176F9091 which
consists of the DC/DC converter and the ribbon cable is
connected to FK101. It generates an isolated 5 V from an
internal 24 V for the RS-485 communication.
FK100 (Master) FK102 (Slave 2)
FK101 (Slave 1) FK103 (Slave 3)
Table 3.7 MDCIC Port Layout
3.3 First Power Up/Commissioning Check
List
The following measurement equipment are recommended:
•
Voltage meter (1 kV AC/DC env. Cat III)
•
Current clamp min. 2 kA
•
Harmonic analyzer, only for commissioning
Check list
•
Check fan voltage supply (3x400 V).
•
Verify that system is not powered.
•
Verify the system is grounded to earth.
- all AFEs and frequency converters
- all motors
- all filters
- the whole crane construction
- HT transformer
•
Check that there are no earth faults or short
circuits at the motor cables and motors.
•
Check that the DC discharge resistor is connected
right and not shorted.
•
Verify phase sequence and continuity for the
voltage sensing on the AFE as described below.
- Make sure that power is not applied.
- Manually close input contactor between
AFE and LCL filter.
- Unplug the MK105 connector on the
MDCIC.
- Measure MK105 of MDCIC harness to
the input phases.
- Red wire of MK105 to phase R.
- White wire of MK105 to phase
S.
- Black wire of MK105 to phase
T.
-
All should be <0.2
Ω
.
•
Open the input contactor between AFE and LCL
filter.
•
Verify that the mains voltage is 630 V RMS and
balanced.
•
Apply power to the LCL filter and verify that the
rms current magnitude measured between the
line and delta connection point is approximately
same as the value using the following formula:
i = 630×314×C×3
3
, where C is the LCL filter
capacitance, delta value.
•
Leave the AFE main contactors open and disallow
the AFE start signal in the PLC.
•
Soft charge the system but do not enable the
main contactor.
•
Let the softcharge circuit active for about 5min.
•
Check the voltage at the AFE Mains side when
the AFE is powered up by softcharge. The voltage
between all phases should be 0 V. Also the
voltage between the phases L1/L2/L3 and earth
should be 0 V. Please call Danfoss service if you
can measure a voltage greater then 10 V here.
Do not switch on the mains contactors if you
measure a voltage more than 10 V here.
•
Verify that the LCP readings for the DC-link
voltage from all the AFE and inverter drives are
within
±
2% of the value measured with the
voltage meter. The estimated DC-link voltage
value at 630 V mains voltage with no load is as
follows:
890
VDC+5/
− 10% =
Vmains_LL_RMS× 2+5/
− 10%
=630×1,414+5/ − 10%
•
Download all the AFE and frequency converter
settings with MCT 10 Set-up Software.
1. Capacitance value of the LC filter in the
inverter drive must be star equivalent.
2. Set the right LCL filter values in the AFE,
the capacitance value of the LCL filter
shall be entered as delta equivalent.
3. Set the right mains values in the AFE.
4. Parameter group 4-** Output Limits AFE
– use factory settings.
5. Total system capacitance par. 7-60 must
be programmed with a sum of the DC-
link capacitance x 0,9.
Crane System Design Operating Instructions
MG33X402 Danfoss A/S © Rev. 05/2014 All rights reserved. 17
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