Siemens 6MD85, Manual

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Figure 6-159 Inverse Control Characteristic
Parameter: T1 Inverse Min
•
Default setting
(_:116) T1 Inverse Min
=
5 s
With the
T1 Inverse Min
parameter, you define the minimum time delay for the control action. This time
applies only to the control response
Inverse
and the response cannot be shorter.
Parameter: T2 delay
•
Default setting
(_:117) T2 delay
=
5 s
With the
T2 delay
parameter, you set the time the tap changer has to wait from one tap position to the
next. During this time, several adjusting commands can be sent to the tap changer in one direction, which
permits a correction of the actual voltage. The time delay T2 has an independent characteristic. The time T2 is
generally set shorter than the time T1. If the time T2 is switched off by a setting equal to 0, the delay T1 is
always active.
Parameter: Fast step up
•
Default setting
(_:118) Fast step up
=
off
Parameter: Fast step up limit
•
Default setting
(_:119) Fast step up limit
=
–6.0 %
Parameter: Fast step up T delay
•
Default setting
(_:120) Fast step up T delay
=
2.0 s
With this parameter, you specify the time delay of the fast step up mode. If the actual voltage is less than the
value of the limit for the fast step up mode (_:119), the fast step up mode is activated. A fast step up mode is
not activated if the value drops below the voltage limit for only a brief period within the time delay.
Parameter: Fast step down
•
Default setting
(_:121) Fast step down
=
on
Parameter: Fast step down limit
•
Default setting
(_:122) Fast step down limit
=
6.0 %
Parameter: Fast step down T delay
•
Default setting
(_:123) Fast step down T delay
=
0.0 s
Control Functions
6.9 Voltage Controller
494 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017