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Siemens AG 6SE8004-0BH76
SIMOVERT MV Commissioning Instructions
57
4.2.11
Testing pre-charging with the main supply connected
The limit for the "pre-charging OK" (block M30.X2 in the FP-GRS) message must
be set to 80%. The checkback signal from the external auxiliaries must be
connected at terminal strip X100 : A45 / C45. The circuit-breaker is connected with
the main supply. The auxiliaries are powered-up after the ON command. The
checkback signals are evaluated and the pre-charging relay is switched-in. After
80% of the rated DC link voltage has been reached, the command to CLOSE the
circuit-breaker is output. The system monitors that the circuit-breaker checkback
signal is received. From now onwards, the DC link is no longer fed via the pre-
charging circuit, but through the incoming rectifier. As long as the inverter is not
enabled, the drive converter is in the ready status with the rated DC link voltage
available. The pre-charging or ready status can be aborted at any time with an
OFF command (door-mounted pushbutton) or using the safety off switch
(mushroom head pushbutton in the door).
4.2.12
Testing the inverter without connected load at the rated DC link
voltage
The inverter can be operated via a setpoint generator block in function package
TRV (refer to Section 4.2.10.3). Operation without a connected load, can be used,
under a fault condition to test the gating circuits and the IGBTs. In this case, an
operating mode must be selected. This selection is made in function package WRS
at block B60.X. For simulation purposes, the inverter can be operated in three
different modes via block SWG in function package TRV.
1. B60.X
2
Standard operation, Transvektor control active
2. B60.X
4
SWG without excitation, service
3. B60.X
5
SWG with excitation, service
Operating mode SWG without energization is selected by entering a “4” at block
B60.X. The inverter is enabled via the selected source in function package IO at
block D70.X1.
Closed-loop controlled operation is selected at block SWG in function package
TRV via connector SWG.IRM. The frequency setpoint of the voltage vector can be
entered at connector SWG50.X. The absolute value of the voltage vector is closed-
loop controlled. A current setpoint can be entered at connector SWG50.X. The
entered current setpoints refer to the nominal shunt data. The SWG.KP and
SWG.TN controller parameters are active. The ON command is entered via the
selected source FP IO D10. The auxiliaries are controlled. As soon as the
checkback signals from the auxiliaries have been evaluated, pre-charging is
executed. The CLOSE command is output to the circuit-breaker with the pre-
charging OK message. The drive converter is now in the ready condition. The
inverter is enabled using the selected source FP IO D70. The inverter now clocks
the semiconductor devices. The inverter is automatically inhibited when the inverter
enable is withdrawn.
