Thytronic NC20 User Manual

65
NC2 0 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
The operation of I
N
>AL element may be inhibited by:
The start of the fi rst element (I
N
>) by setting ON the Disable IN>AL by start IN> (IN>ALdisbyIN>)
parameter available inside the Set \ Profi le A(or B) \ Neutral unbalance current-46N \
IN> Element \ Setpoints menu.
The start of second element (I
N
>>) by setting ON the Disable IN>AL by start IN>>
(IN>ALdisbyIN>>) parameter available inside the Set \ Profi le A(or B) \ Neutral unbalance cur-
rent-46N \ IN>> Element \ Setpoints menu.
Similarly, the operation of I
N
> element may be inhibited by the start of the second element (I
N
>>)
by setting ON the Disable I
N
> by start I
N
>> (IN>disbyIN>>) parameter available inside the Set \
Profi le A(or B) \ Neutral unbalance current-46N \ IN>> Element \ Setpoints menu.
All the named parameters can be set separately for Profi le A and Profi le B menus.
The operation threshold elements (I
N
>, I
N
>>) can produce the Breaker Failure output if the IN> BF
and/or IN>> BF parameter is set to ON. The parameters are available inside the Set \ Profi le A(or
B) \ Neutral unbalance current-46N \ IN> Element (IN>> 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 INCLP>AL Mode,
INCLP>Mode and/or INCLP>> Mode 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 INCLP>AL Mode,
INCLP>Mode and/or INCLP>> Mode parameters, whereas the operating thresholds with-
in the CLP may be adjusted inside the Set \ Profi le A(or B) \ Neutral unbalance current-46N \
IN>AL (Element IN> Element IN>>) Element \ Setpoints menus.
For both operating modes the CLP Activation time parameters (tNCLP-AL, tNCLP>, tN-
CLP>>) may be adjusted inside the Set \ Profi le A(or B) \ Neutral unbalance current-46N \
IN>AL (Element IN> Element IN>>) Element \ Setpoints menus.
For every of the two thresholds the following block criteria are available:
Logical block (Block1)
If the IN>ALBLK1, IN>BLK1 and/or IN>>BLK1 enabling parameters are 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 parameters are available inside the Set \ Profi le A(or B) \ Neu-
tral unbalance current-46N \ IN>AL (Element IN> Element IN>>) 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 IN>BLK2IN and/or IN>>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 pro-
tection element (Block2 Iph/IE) according the selectivity block criteria.
[3]
The enable IN>BLK2IN,
IN>>BLK2IN parameters is available inside the Set \ Profi le A(or B) \ Neutral unbalance current-
46N \ Element IN> (Element IN>>) 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 \ Profi le A(or B) \ Selective block-
BLOCK2 \ Selective block OUT menus.
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