ABB REB670 - Application

13.10.2 Application
GUID-221AFC68-C31C-459F-8301-2A8048CB93CE v1
Integer to Boolean conversion for six-zone busbar BCTZCONN is used to transform
the zone connection integer signal of each CT from one bay function block into 7
binary (logical) signals in the six-zone busbar differential protection. It is intended to
facilitate the recording of zone connection information from each bay function block to
the disturbance recorder
.
The BCTZCONN function does not have a logical node mapping and is designed to
receive only an integer input locally. If the BLOCK input is activated, it freezes the
logical outputs at the last values.
More specifically, it transfers an integer input ZONCONI to a combination of activated
binary outputs ZONEx (1≤x≤6) and CZ, so that:
6
61
1
2 2
x
x
ZONCONI CZ ZONEx


   

IECEQUATION16077 V1 EN-US (Equation 89)
where 0≤ZONCONI≤127. Note that when a binary output ZONEx or CZ is activated,
it has the logical value one. Otherwise, it has the logical value zero
.
The equation above also implies that each individual binary output corresponds
actually to one integer, which is presented in the input ZONCONI and can be defined
by:
CZ×2
6
or ZONEx×2
x-1
, (1≤x≤6).
Refer to Table
44 for the description of such representations.
Table 44: Integer representations for the binary outputs of BCTZCONN
Output names Type Description
Corresponding integer value
in ZONCONI
When
deactivated
When
activated
ZONE1 BOOLEAN Bay is connected to Z1 0 1
ZONE2 BOOLEAN Bay is connected to Z2 0 2
ZONE3 BOOLEAN Bay is connected to Z3 0 4
ZONE4 BOOLEAN Bay is connected to Z4 0 8
ZONE5 BOOLEAN Bay is connected to Z5 0 16
ZONE6 BOOLEAN Bay is connected to Z6 0 32
CZ BOOLEAN Supervision status of the check
zone on differential zones (Valid
only for feeder bays)
0 64
Section 13 1MRK 505 370-UUS A
Logic
418 Busbar protection REB670 2.2 ANSI
Application manual