Siemens Simovert 6SE70 Series Operating Instructions Manual page 90

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Start-Up
no
Regen.
transformer?
yes
Permanent
reduction
yes
P318 =
P571 = 0001
Idle time
yes
of converter
>1year
no
P408 =
P052 = 20
P key
Switch-on
Forming
r000 ≤
o 009
Wait to
Ud<50V
4-8
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AoteWell Automation Sales Team
Mode variants:
a) The system voltage in the regenerative branch is
no
b) Permanent reduction of the link voltage by phase
P318 =
c) Reduction of the DC link voltage only for regenerative
P319 =
P571 = 1004
c1) Externally required reduction of the DC link voltage
P613 = 1001
c2) Automatic reduction of the DC link voltage depending
(see r006)
Forming the DC link (if necessary; see Section
4.3.9.6)
- The rectifier/regenerating unit must be in status o 009 or
less (give SWITCH OFF command!).
- Set P408 (forming time: 1.0 to 600.0 minutes).
- Select function (P052 = 20)
- Press the P key on the PMU
- Switch on: Press the I key on the PMU
- Forming of the DC link takes place
- Following the forming process, the status display is
activated.
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stepped up by an (auto) transformer in order not to
have to reduce the link voltage in regenerative mode
angle control in rectifier mode to always be able to
feed power back into the system
P318 Reduced DC link voltage setpoint (e.g. = 80 %)
P571 = 0001 Permanent selection of reduced voltage
feedback operation to make full use of the line voltage
in infeed operation and to obviate the need for an
autotransformer for regenerative feedback. (See also
Chapter 4.3.10.2)
by external control (using the control word command
"Ud reduction requested")
P318 reduced DC link voltage setpoint (e.g. = 80 %)
P571 = 1004 on selection of the reduction via terminal
X101-12 (binary input 4)
P613 = 1001 message "DC link voltage reduced"
output at alarm relay X104-17/18 (ready
for regenerative feedback)
P319 Hysteresis for the message "DC link voltage
reduced" (ready for regenerative feedback)
on the DC link current (only implemented on Software
Version 3.2 and higher and not shown in the adjacent
diagram):
If the DC link current falls below threshold P321 in
infeed direction, the command for Ud reduction is
generated internally. The load current drawn must still
remain positive for long enough before it changes
direction after falling below P321 to permit a drop of
Ud to the required value. The current-dependent Ud
reduction therefore only works if the appropriate load
cycle applies.
Relevant parameters: P318, P319, P321, P322, P323
Rectifier/Regenerating Unit
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Siemens AG 6SE7087-6AK85-1AA0
Operating Instructions
https://www.aotewell.com
09.02