ABB Relion 670 Series Technical Reference Manual page 849

1MRK505222-UUS C
13.8.5.3
13.8.5.4
Technical reference manual
released, and in 2 out of 2 mode both the CRs should be high to release trip signal. If
any one of the channel error signals is high in 2 out of 2 mode, then logic automatically
switches to 1 out of 2 mode after a time delay of 200 ms. After switching to 1/2 mode
under channel error condition and if channel error gets cleared the mode will switch
back only after a time delay of 200 ms.
If the input channel error signal is high then the respective carrier receive signal will be
blocked.
The complete function can be blocked by setting the BLOCK input high.
Function block
LCCRPTRC (94)
BLOCK TRIP
LOCTR TR_A
LOCTR_A TR_B
LOCTR_B TR_C
LOCTR_C
CHERR1
CHERR2
CR!
CR2
ANSI09000766-1-en.vsd
ANSI09000766 V1 EN
Figure 420: LCCRPTRC (94) function block
Input and output signals
Table 463: LCCRPTRC (94) Input signals
Name Type
BLOCK BOOLEAN
LOCTR BOOLEAN
LOCTR_A BOOLEAN
LOCTR_B BOOLEAN
LOCTR_C BOOLEAN
CHERR1 BOOLEAN
CHERR2 BOOLEAN
CR! BOOLEAN
CR2 BOOLEAN
Scheme communication
Default Description
0 Block of function
0 Local common trip signal coming from DTT
0 Local trip signal for phase A coming from DTT
0 Local trip signal for phase B coming from DTT
0 Local trip signal for phase C coming from DTT
0 Channel error indication flag for carrier receive 1
0 Channel error indication flag for carrier receive 2
0 Carrier receive 1
0 Carrier receive 2
Section 13
843