Start-Up 09.02
4-8 Siemens AG 6SE7087-6AK85-1AA0
Rectifier/Regenerating Unit Operating Instructions
P571 = 0001
P318 =
P408 =
r000
≤
o
009
P613 = 1001
P571 = 1004
P319 =
P318 =
Regen.
transformer?
yes
no
Permanent
reduction
yes
Wait to
Ud<50V
Forming
Idle time
of converter
>1year
yes
no
no
(see r006)
P052 = 20
P key
Switch-on
Mode variants:
a) The system voltage in the regenerative branch is
stepped up by an (auto) transformer in order not to
have to reduce the link voltage in regenerative mode
b) Permanent reduction
of the link voltage by phase
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
c) Reduction of the DC link voltage only for regenerative
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)
c1) Externally required reduction
of the DC link voltage
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)
c2) Automatic reduction
of the DC link voltage depending
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
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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