Siemens 6MD85 Manual page 632

Protection and Automation Functions
7.4 Overcurrent Protection, Phases
Several AREC signals can affect the setting for the Threshold and Operate delay parameters of the
protection stage and its blocking.
•
AREC is ready for reclosing 1 (= Automatic reclosing cycle 1)
•
AREC is ready for reclosing 2 (= Automatic reclosing cycle 2)
•
AREC is ready for reclosing 3 (= Automatic reclosing cycle 3)
•
AREC is ready for reclosing 4 (= Automatic reclosing cycle >3)
The following signal can only block the protection stage:
•
AREC is not ready or switched off (= Automatic reclosing off / not ready)
This means that if the AREC is ready and the protection stage is in the idle state, the settings for
AREC cycle 1 are active and not the standard settings. The standard settings are active in the case of AREC
off/not ready.
The influence can be activated for each signal individually. You also have to set the Threshold and Operate
delay or Stage blocked parameters, which take effect when the signal is active.
The way AREC signals are generated is described in chapter
Link to the Device-Internal Function
[loocp3kal-030311-01.vsd, 1, en_US]
Figure 7-74
In the case of cold-load pickup, you have the option to change the settings for the Threshold and Operate
delay parameters of the protection level. You can also block the level. To do so, you must activate the influ-
ence of the cold-load pickup. You also have to set the Threshold and Operate delay or assign settings to
Stage blocked, which take effect when the signal is active.
The way signals are generated Cold-load pickup is described in chapter
Link to an External
Function via a Binary Input Signal (Advanced Stage)
[loocp3bin-030311-01.vsd, 1, en_US]
Figure 7-75
You can use the binary input signal >Activ. dyn. settings to change the settings for the Threshold
and the Operate delay parameters of the protection stage. You can also block the level. To do so, you must
activate the influence of the binary input. You also have to set the Threshold and Operate delay or
assign settings to Stage blocked, which take effect when the signal is active.
632
Cold-Load Pickup Detection (Advanced Stage)
Influence of the Cold-Load Pickup Detection on the Overcurrent-Protection Stage
Influence of the Binary Input on the Overcurrent-Protection Stage
7.2.1 Overview of Functions.
5.8.1 Overview of
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
Functions.