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1MAC050144-MB C
Section 4
Protection functions
615 series ANSI
285
Technical Manual
4.4.2.2
Function block
Figure 134:
Function block
4.4.2.3
Functionality
Directional negative/zero sequence power protection (32N) is used to detect negative or
residual power direction. The output of the function is used for blocking or releasing other
functions in protection scheme.
In negative sequence voltage selection, if the angle difference between negative sequence
voltage and negative sequence current is in predefined direction (either in forward or
reverse direction), 32N gives release signal after a definite time delay.
In residual voltage selection, if the angle difference between residual voltage and residual
current is in predefined direction (either in forward or reverse direction), 32N gives release
signal after a definite time delay.
This function contains a blocking functionality which blocks the function output and resets
the timer.
4.4.2.4
Operation principle
The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are “On” and “Off”.
The operation of 32N can be described by using a module diagram (see Figure 135). All
the modules in the diagram are explained in the next sections.
RELEASE
VG
32N
I2
V2
VN
IN
IG
BLOCK
RCA_CTL
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
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Page 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Page 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Page 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Page 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Page 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
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