Siemens 7SJ85 - Overvoltage Protection with Positive-Sequence Voltage; Overview of Functions; Structure of the Function

Overvoltage Protection with Positive-Sequence Voltage
Overview of Functions
The function Overvoltage protection with positive-sequence voltage (ANSI 59) is used to:
•
Detect symmetric stationary overvoltages
•
Supervise the voltage range if the positive-sequence voltage is the decisive quantity
Unbalanced overvoltages, for example, caused by ground faults and unbalanced faults, are not detected due
to the evaluation of the positive-sequence voltage.
Structure of the Function
The Overvoltage protection with positive-sequence voltage function is used in protection function groups,
which are based on voltage measurement.
The function Overvoltage protection with positive-sequence voltage comes factory-set with 2 stages. A
maximum of 3 tripping stages can be operated simultaneously in the function. The tripping stages have an
identical structure.
[dwovpu1s-030211-01.tif, 1, en_US]
Figure 6-185 Structure/Embedding of the Function
6.25
6.25.1
6.25.2
Protection and Automation Functions
6.25 Overvoltage Protection with Positive-Sequence Voltage
710 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017