Breaker-And-A-Half - ABB RELION 670 SERIES Applications Manual

1MRK 506 369-UUS -
15.1.3.5
Line distance protection REL670 2.2 ANSI
Application manual
A double breaker arrangement requires two function blocks, one for breaker WA1_QA1
and one for breaker WA2_QA1. No voltage selection is necessary, because the voltage
from busbar 1 VT is connected to V3PB1 on SESRSYN for WA1_QA1 and the voltage
from busbar 2 VT is connected toV3PB1 on SESRSYN for WA2_QA1. The voltage from
the line VT is connected to V3PL1 on both function blocks. The condition of VT fuses
shall also be connected as shown in figure 304. The voltage selection parameter CBConfig
is set to No voltage sel. for both function blocks.

Breaker-and-a-half

Figure 306 describes a breaker-and-a-half arrangement with three SESRSYN functions in
the same IED, each of them handling voltage selection for WA1_QA1, TIE_QA1 and
WA2_QA1 breakers respectively. The voltage from busbar 1 VT is connected to V3PB1
on all three function blocks and the voltage from busbar 2 VT is connected to V3PB2 on
all three function blocks. The voltage from line1 VT is connected to V3PL1 on all three
function blocks and the voltage from line2 VT is connected to V3PL2 on all three function
blocks. The positions of the disconnectors and VT fuses shall be connected as shown in
Figure 306.
Section 15
Control
645