![background image](http://html.mh-extra.com/html/abb/relion-615-series/relion-615-series_technical-manual_2395849.webp)
A070972-ANSI V1 EN
Figure 432:
Incorrect connection of trip-circuit supervision
A connection of three protection relays with a double pole trip circuit is shown in the
following figure. Only the protection relay R3 has an internal TCM circuit. In order to test
the operation of the protection relay R2, but not to trip the circuit breaker, the upper trip
contact of the protection relay R2 is disconnected, as shown in the figure, while the lower
contact is still connected. When the protection relay R2 operates, the coil current starts to
flow through the internal resistor of the protection relay R3 and the resistor burns
immediately. As proven with the previous examples, both trip contacts must operate
together. Attention should also be paid for correct usage of the trip circuit supervision
while, for example, testing the protection relay.
1MAC059074-MB A
Section 6
Supervision functions
615 series ANSI
843
Technical Manual
Содержание Relion 615 series
Страница 1: ... RELION PROTECTION AND CONTROL 615 series ANSI Technical Manual ...
Страница 2: ......
Страница 39: ...Section 17 Glossary 1181 Table of contents 615 series ANSI 33 Technical Manual ...
Страница 40: ...34 ...
Страница 64: ...58 ...
Страница 210: ...3 19 4 Settings Section 3 1MAC059074 MB A Basic functions 204 615 series ANSI Technical Manual ...
Страница 216: ...210 ...
Страница 884: ...878 ...
Страница 1038: ...1032 ...
Страница 1136: ...1130 ...
Страница 1172: ...1166 ...
Страница 1180: ...1174 ...
Страница 1186: ...1180 ...
Страница 1192: ...1186 ...
Страница 1193: ...1187 ...
Страница 1194: ......
Страница 1195: ......