1MAC050144-MB C
Section 6
Supervision functions
615 series ANSI
457
Technical Manual
Since incorrectly measured voltage can result in a misoperation of some of the protection
functions, fast failure detection is one of the means to block voltage-based functions before
they operate.
Figure 243:
Fault in a circuit from the voltage transformer to the IED
A fuse failure occurs due to blown fuses, broken wires or intended substation operations.
The negative sequence component-based function can be used to detect different types of
single-phase or two-phase fuse failures. However, at least one of the three circuits from the
voltage transformers must not be broken. The supporting delta-based function can also
detect a fuse failure due to three-phase interruptions.
In the negative sequence component-based part of the function, a fuse failure is detected
by comparing the calculated value of the negative sequence component voltage to the
negative sequence component current. The sequence entities are calculated from the
measured current and voltage data for all three phases. The purpose of this function is to
block voltage-dependent functions when a fuse failure is detected. Since the voltage
dependence differs between these functions, 60 has two outputs for this purpose.
Содержание 615 Series ANSI
Страница 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Страница 2: ......
Страница 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Страница 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Страница 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Страница 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Страница 707: ...Section 15 1MAC050144 MB C Applicable standards and regulations 700 615 series ANSI Technical Manual ...
Страница 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
Страница 712: ......