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FUNCTION CHARACTERISTICS

NA10 - Manual - 04 - 2022

• 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(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 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, BLK-

2OUT-Iph/IE-K and/or BLK2OUT-IE-K output relays and LEDs (BLK2OUT-Iph-L, BLK-

2OUT-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.

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

Thytronic NA10 User Manual

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