FUNCTION CHARACTERISTICS
34
NG10 - Manual - 04 - 2022
Block2 IPh
A change in status of a binary input effects a block
[1]
for the phase protective elements.
Block2 IE
A change in status of a binary input effects a block
[1]
for the earth protective elements.
Block1
A change in status of a binary input effects a block for a length of time equal to the activation of the
input[2]; the element pickup that wish be blocked must be enabled (the Block1 parameter must be
set to ON in the concerning menu).
[3]
The application of the INx binary input for the acquisition of the Block1 (logic block) coming from
external signal is shown in the following figure; in the example the block signal is ORed with Block2
(selective block) to block the generic (xxx) element).
The following signals are provided for logic block:
• 87GML logical block sides H-L (single-input blocking enabled features on the sides H and L as well
as the differential protection 87GML)
• H-side logic block (an input lock features enabled on the H side)
• L-side logical block (an input lock features enabled on the L side)
• 87T logic block (an input lock the 87GML element)
TCS1 and TCS2
Trip Circuit Supervision.
Supervision with one or two binary input can be performed.
The exhaustive treatment of the TCS function is described in the concerning paragraph.
Trip ProtExt
The binary input detects a trip coming from an external protective relay: the information is available
for the breaker failure function (BF)
The following signals are provided:
• Trip Protext sides H-L (a single input block functions on H and L sides)
• Trip Protext side H (a single input block functions on H side)
• Trip Protext side L (a single input block functions on L side)
Note 1 The exhaustive treatment of the Block 2 function is described in the “Logic selectivity” paragraph.
The application of the inputs for the acquisition of Block2 (selective block) for Phase (Block2 Iph) and earth protective functions (Block2 IE) is
similar to that illustrated in the scheme concerning the Block2 IphIIE
Note 2 Unlike the Block2 (selective block), that houses a safety logic founded on programmable timers, the Block1 (logic block) keeps block of the
protection for the whole time when the input is active.
Note 3 The activation of one binary input produces indiscriminately a block of all protective elements programmed for being blocked from Block1
Block1.ai
xxxx Block1
Enable (ON≡Enable)
Block1 input (ON≡Block)
Block1
from Block2 (ON≡Block)
&
Block1
Block1
Binary input INx
Blocking
T 0
INx
t
ON
T0
n.o.
n.c.
INx tON
Logic
INx tOFF
INx
t
OFF
≥ 1
Binary input allocation for Block 1 acquisition
TCS2.ai
Trip Circuit Supervision - 74TCS
CB
TC
TRIP TRIP
74TCS
52a 52b
U
aux
U
aux
U
aux
IN1
IN2
CB
TC
74TCS
52a 52b
aux
IN1
74TCS
IN2
IN1
0
01
0
11
0
10
1 (2 s after)
00
74TCS
IN1
0
1
1 (40 s after)
0
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