FUNCTION CHARACTERISTICS
37
NA30 - Manual - 04 - 2022
Block2 IPh/IE
A change in status of a binary input effects a block
[1]
common for the following phase and ground
protective elements:
• I
>,
I
>> and
I
>>> (50/51),
• DthAL1,
DthAL2
and
Dth
(49),
• I
PD
>,
I
PD
>>,
I
PD
>>> and
I
PD
>>>> (67),
and ground fault:
• I
E
>,
I
E
>> and
I
E
>>> (50N/51N),
• I
ED
>,
I
ED
>>,
I
ED
>>> and
I
E
>>>> (67N),
The application of the IN1 and IN2 binary inputs for the acquisition of Block2 (selective block) com-
ing from external protection relays is shown in the following figure (one phase overcurrent and one
phase and residual overcurrent protection).
Block2 IPh
A change in status of a binary input effects a block
[2]
for the following phase protective elements:
• I
>,
I
>> and
I
>>> (50/51),
DthAL1
,
DthAL2
and
Dth
> (49),
I
PD
>,
I
PD
>>,
I
PD
>>> and
I
PD
>>>> (67)
Block2 IE
A change in status of a binary input effects a block
[1]
for the following earth protective elements:
• I
E
>,
I
E
>> and
I
E
>>> (50N/51N),
I
ED
>,
I
ED
>>,
I
ED
>>> and
I
ED
>>>> (67N).
Block1
A change in status of a binary input effects a block for a length of time equal to the activation of the
input[3]; the element pickup that wish be blocked must be enabled (the
Block1
parameter must be
set to
ON
in the concerning menu).
[4]
The application of the IN1 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.
Note 1 The exhaustive treatment of the Block 2 function is described in the “Logic selectivity” paragraph.
Note 2 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 3 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 4 The activation of one binary input produces indiscriminately a block of all protective elements programmed for being blocked from Block1
≥
1
≥
1
≥
1
Block2IPh/IE
T
0
t
B-Iph
BlockIph-Ie.ai
Binary input allocation for logic selectivity (Block2)
t
B-Iph
t
B-IE
xxxxx Trip Block2
Block2 input enable (ON
≡
Enable)
&
Block2 IN
towards reset timer
IPh Block2 input
IE Block2 input
Block2 IN diagnostic
Block2 input
FROM ANY PROTECTIONS
FROM OVERCURRENT PROTECTIONS
T
0
t
B-IE
IPh/IE Block2
Binary input INx (x=1,... 5)
T
0
Logic
IN2
t
ON
INx
t
ON
IN2
t
OFF
T
0
n.o.
n.c.
INx
t
OFF
FROM EARTH FAULT PROTECTIONS
Block1.ai
xxxx Block1
Enable (ON
≡
Enable)
Block1 input (ON
≡
Block)
Block1
from Block2 (ON
≡
Block)
&
Block1
Block1
Binary input INx (x=1,... 5)
Binary input allocation for logic block
(Block1)
Blocking
T
0
IN1
t
ON
T
0
n.o.
n.c.
IN1 tON
Logic
IN1 tOF F
IN1
t
OFF
≥
1
