FUNCTION CHARACTERISTICS
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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.
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