FUNCTION CHARACTERISTICS
73
NA30 - Manual - 04 - 2022
Only when the committed pilot wire are used the continuity check of the pilot wire link is active.
Use of committed pilot wire input BLIN1:
• The protection is blocked off according the selectivity block criteria when the input BLIN1 is active.
The information about phase or phase+earth block may be select programming the
ModeBLIN1
parameter inside the
Set \ Profile A(or B) \ Selective block-BLOCK2 \ Selective block IN
menus.
Use of binary inputs:
• If the
IE>BLK2IN, IE>>BLK2IN
and/or
IE>>>BLK2IN
parameters are set to
ON
and a
binary input is designed for selective block (Block2), the protection is blocked off by phase ele-
ments (Block2 Iph) or by any protection element (Block2 Iph/IE) according the selectivity block
criteria.
[1]
The enable
IE>BLK2IN, IE>>BLK2IN
and/or
IE>>>BLK2IN
parameters are avail-
able inside the
Set \ Profile A(or B) \ Residual overcurrent-50N/51N \
IE> Element
(
IE>> Element
,
IE>>> Element) \ Setpoints
menus, while the
Block2 Iph
and
Block2 Iph/IE
functions must be
assigned to the selected binary inputs inside the
Set \ Inputs \ Binary input IN1(x)
menus (IN1 or
IN2 matching).
Use of committed pilot wire output BLOUT1:
• The information about phase or phase+earth block may be select programming the
ModeBLOUT1
parameter (
OFF - ON IPh - ON IPh/IE - ON IE
) inside
Set \ Profile A(or B) \ Selective block-
BLOCK2 \ Selective block OUT
menus.
Use of output relay (K1...K6):
• If the
IE>BLK2OUT, IE>>BLK2OUT
and/or
IE>>>BLK2OUT
enable parameters are set to
ON
and a output relay is designed for selective block (Block2), the protection issues a block output
by phase elements (BLK2OUT-Iph) or by any protection element (BLK2OUT-Iph/IE), whenever the
given element (Start IED>, Start IED>>, Start IED>>> and/or Start IED>>>>) becomes active. The
enable
IED>BLK2OUT, IED>>BLK2OUT, IED>>>BLK2OUT
and/or
IED>>>>BLK2OUT
parameters (
ON
or
OFF
) are available inside the
Set \ Profile A(or B) \ Residual overcurrent-
50N/51N \
IE> Element
(
IE>> Element
,
IE>>> Element) \ Setpoints
menus, while the
BLK2OUT-
Iph-K, BLK2OUT-Iph/IE-K
and/or
BLK2OUT-IE-K
output relays and LEDs (
BLK2OUT-Iph-L,
BLK2OUT-Iph/IE-L
e/o
BLK2OUT-IE-L
) must be select inside the
Set \ Profile A(or B) \ Selec-
tive block-BLOCK2 \ Selective block OUT
menu.
Internal selective block (Block4)
As well as to send or transmit a selective block toward other protective relays, each protective
element may be enabled for receive or transmit a selective block from/to other internal protective
elements.
[2]
The internal selective block of one or more element concerning the residual overcurrent function
may be enabled/disabled by means the
IE>BLK4
,
IE>>BLK4
and/or
IE>>>BLK4
parameters
(virtual input and output common to all protective thresholds); the following operating modes are
available:
• IN - the element is enabled to receive the selective block from an internal input.
• OUT - the element is enabled to send the selective block to an internal output.
• OFF - the element is disabled to send/receive the internal selective block.
Transmission and reception for the same element is not allowed, so any stall situation due to wrong
setting is avoided.
The internal selective block can work together with an external selective block from other protective
relays (Block2).
Note 1 The exhaustive treatment of the selective block (Block 2) function may be found in the “Selective Block” paragraph inside
CONTROL AND
MONITORING
section
Nota 2 The exhaustive treatment of the internal selective block (Block 4) function may be found in the “Internal selective block” paragraph inside
CONTROL AND MONITORING
section.