Thytronic NC20 User Manual

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NC2 0 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
Selective block (Block2)
For the operation threshold element, 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 parameter is 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 selectivity block criteria.
[1]
The enable I>BLK2IN parameter is available in-
side the Set \ Profi le A(or B) \ Phase overcurrent-50/51 RMS \ I> Element \Setpoints menu, 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 \ Profi le A(or B) \ Selective block-
BLOCK2 \ Selective block OUT menus.
Use of output relay (K1...K6):
If the I>BLK2OUT enable parameter is 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>) becomes active. The
enable I>BLK2OUT parameter (ON or OFF) is available inside the Set \ Profi le A(or B) \ Phase
overcurrent-50/51 RMS \ I> Element \Setpoints menu, 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.
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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all-F50-51.ai
General logic diagram of the phase overcurrent elements - 50/51 RMS
I
L1RMS
I
L2RMS
I
L3RMS
I
L1RMS
I
L2RMS
I
L3RMS
≥
I>AL inhibition
I>
AL
disbyI>>
I>AL Element
Start I>
AL
Trip I>
AL
t
> ALdef
ICLP>
ALdef
I>
ALdef
ICLP>
AL
Mode
tCLP>
AL
I>
AL
Enable
≥
I>
AL
disbyI>>>
I> disbyI>>
I> disbyI>>>
Block1
BLK1I>
AL
&
I>
AL
BLK1
Start I>
AL
&
Start I>
&
I>
AL
disbyI>
I> inhibition
CLPI>
I> Element
BLK2OUT
BLK2INI>
Start I>
Trip I>
Block2
&
I>BLK2IN
I>BLK2OUT
I>BF
Trip I>
&
I>BF
Start I>
&
t
> def
ICLP>
def
I>
def
t
> inv
ICLP>
inv
I>
inv
I>Curve
ICLP>Mode
tCLP>
t
> RES
I> Enable
Block1
BLK1I>
&
I>BLK1
Start I>
&
Start I>
&

Thytronic NC20 Specifications

General

Brand	Thytronic
Model	NC20
Category	Power distribution unit
Language	English