FUNCTION CHARACTERISTICS
90
NA30 - Manual - 04 - 2022
Selective block (Block2)
All along the protective elements the selective block may be set.
The logic selectivity function may be performed by means any combination of the following I/O:
• One committed pilot wire input (BLIN1).
• One or more binary inputs designed for input selective block.
• One committed pilot wire output (BLOUT1).
• One or more output relays designed for output selective block.
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
IED>BLK2IN, IED>>BLK2IN, IED>>>BLK2IN
and/or
IED>>>>BLK2IN
parameters
are set to
ON
and a binary input is designed for selective block (Block2), the protection is blocked
off by phase elements (Block2 Iph) or by any protection element (Block2 Iph/IE) according the se-
lectivity block criteria.
[1]
The enable
IED>BLK2IN, IED>>BLK2IN, IED>>>BLK2IN
and/or
IED>>>>BLK2IN
parameters are available inside the
Set\Profile A(or B)\Directional earth fault
overcurrent-67N \
IED> Element
(
IED>> Element
,
IED>>> Element
,
IED>>>> 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(2)
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
IED>BLK2OUT, IED>>BLK2OUT, IED>>>BLK2OUT
and/or
IED>>>>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 S
et\Profile
A(or B)\Directional earth fault overcurrent-67 \
IED> Element
(
IED>> Element
,
IED>>> Element
,
IED>>>> 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)\Selective 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 directional earth fault overcur-
rent function may be enabled/disabled by means the
IED>BLK4
,
IED>>BLK4
,
IED>>>BLK4
and/or
IED>>>>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.
