Thytronic NC20 User Manual

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NC2 0 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
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 \ Profi le A(or B) \ Selective block-BLOCK2 \ Selective block IN menus.
Use of binary inputs:
If the I>>BLK2IN and/or I>>>BLK2IN parameters are set to ON and a binary input is de-
signed for selective block (Block2), the protection is blocked off by phase elements (Block2 Iph)
or by any protection element (Block2 Iph/IE) according the selectivity block criteria.
[1]
The enable
I>BLK2IN, I>>BLK2IN and/or I>>>BLK2IN parameters are available inside the Set \ Profi le
A(or B) \ Phase overcurrent-50/51 Fundamental \ I>> Element (I>>> 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 INx 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 \ Profi le A(or B) \ Selective block-
BLOCK2 \ Selective block OUT menus.
Use of output relay (K1...K6):
If the I>BLK2OUT, I>>BLK2OUT and/or I>>>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 I>, Start I>> e/o Start I>>>) becomes active. The enable I>BLK2OUT,
I>>BLK2OUT and/or I>>>BLK2OUT parameters (ON or OFF) are available inside the Set
\ Profi le A(or B) \ Phase overcurrent-50/51 Fundamental \ I>> Element (I>>> 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 \ Profi le A(or B) \ Selective block-BLOCK2 \ Selective block OUT menu.
All the named parameters can be set separately for Profi le A and Profi le B menus.
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
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Thytronic NC20 Specifications

General

Brand	Thytronic
Model	NC20
Category	Power distribution unit
Language	English