Thytronic NC20 User Manual

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NC2 0 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
All the named parameters can be set separately for Profi le A and Profi le B (Set \ Profi le A(or B) \
Phase unbalance-46 \ I2> Element (I2>> Element) \ Setpoints menu).
The operation threshold elements can produce the Breaker Failure output if the I2> BF and/or
I2>> BF parameters are set to ON. The parameters are available inside the Set \ Profi le A(or B) \
Phase unbalance-46 \ I2> Element (I2>> Element) \ Setpoints menus.
[1]
If the CLP function (Cold Load Pick-up) is enabled for element blocking, the selected threshold may
be blocked for an adjustable time interval, starting from the circuit breaker closure.
This operating mode may be select by setting ON-Element blocking the I2CLP> and/or I2CLP>>
parameters.
If the CLP function (Cold Load Pick-up) is enabled for threshold change, the selected threshold may
be changed for an adjustable time interval, starting from the circuit breaker closure.
This operating mode may be select by setting ON-Change setting the I2CLP>Mode and/or
I2CLP>>Mode, parameter, whereas the operating thresholds within the CLP may be adjusted in-
side the Set \ Profi le A(or B) \ Phase unbalance-46 \ I2> Element (I2>> Element) \ Setpoints menus.
For both operating modes the CLP activation time parameters (t2>CLP, t2>>CLP) may be adjusted
inside the Set \ Profi le A(or B) \ Phase unbalance-46 \ I2> Element (I2>> Element) \ Setpoints menu.
The following block criteria are available:
Logical block (Block1)
If the I2>BLK1 enabling parameter is set to ON and a binary input is designed for logical block
(Block1), the concerning element is blocked off whenever the given input is active.
[2]
The enabling
parameter is available inside the Set \ Profi le A(or B) \ Phase unbalance-46 \ I2> Element (I2>>
Element) \ Setpoints menus, while the Block1 function must be assigned to the selected binary
input inside the Set \ Inputs \ Binary input IN1(x) menus.
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 I2>BLK2IN is set to ON and a binary input is designed for selective block (Block2), the pro-
tection is blocked off by phase elements (Block2 Iph) or by any protection element (Block2 Iph/IE)
according the selectivity block criteria.
[3]
The enable I2>BLK2IN and/or I2>>BLK2IN param-
eters are available inside the Set \ Profi le A(or B) \ Phase unbalance-46 \ I2> 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 I2>BLK2OUT and/or I2>>BLK2OUT enable parameters is set to ON and a output relay is
designed for selective block (Block2), the protection issues a block output by earth elements (BLK-
2OUT-IE) or by any protection element (BLK2OUT-Iph/IE), whenever the given element (Start I2>,
Start I2>>) becomes active. The enable I2>BLK2OUT, I2>>BLK2OUT parameters (ON or OFF)
are available inside the Set \ Profi le A(or B) \ Phase unbalance-46 \ I2> Element (I2>> Element) \ Set-
points 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.
Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu.
Note 2 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITOR-
ING section
Note 3 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