Siemens SIPROTEC 4 User Manual

Flexible Protection Functions
The flexible protection function is applicable for a variety of protection principles. The user can create up to 20
flexible protection functions and configure them according to their function. Each function can be used either
as an autonomous protection function, as an additional protective element of an existing protection function
or as a universal logic, e.g. for monitoring tasks.
Functional Description
General
The function is a combination of a standard protection logic and a characteristic (measured quantity or derived
quantity) that is adjustable via parameters. The characteristics listed in table 2-20 and the derived protection
functions are available.
Table 2-19 Possible Protection Functions
Characteristic
Group
Characteristic / Measured Quantity Protective Function ANSI-No. Mode of Operation
3–phase 1–phase
Current
Ι
RMS value of fundamental
component
Time overcurrent protec-
tion
50, 50G X X
Ι
rms
True RMS (r.m.s. value) Time overcurrent protec-
tion
Thermal overload protec-
tion
50, 50G X X
3Ι
0
Zero sequence system Time overcurrent protec-
tion, ground
50N X
Ι1
Positive-sequence component X
Ι2
Negative-sequence component Negative sequence protec-
tion
46 X
Ι2/Ι1
Positive/negative sequence
component ratio
X
Frequency f Frequency Frequency protection 81U/O without phase
reference
df/dt Frequency change Frequency change protec-
tion
81R
Voltage V RMS value of fundamental
component
Voltage protection
Displacement voltage
27, 59,
59G, 59N,
59NC
X X
V
rms
True RMS (r.m.s. value) Voltage protection
Displacement voltage
27, 59,
59G, 59N,
59NC
X X
3V
0
Zero sequence system Displacement voltage 59N X
V
1
Positive-sequence component Voltage protection 27, 59 X
V
2
Negative-sequence component Voltage asymmetry 47 X
dV/dt Voltage change Voltage change protection X
Power P Real power Reverse power protection
Power protection
32R, 32, 37 X X
Q Reactive power Power protection 32 X X
cos φ Power factor Power factor 55 X X
Binary input – Binary input Direct coupling without phase
reference
2.19
2.19.1
Functions
2.19 Flexible Protection Functions
270 SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016

Siemens SIPROTEC 4 Specifications

General

Brand	Siemens
Model	SIPROTEC 4
Category	Protection Device
Language	English