120
NVA100X-D - Manual - 02 - 2016
FUNCTION CHARACTERISTICS
If the CLP Source parameter is set to CB and the circuit breaker is open, the protection is blocked
off or or the equivalent thermal current is decreased by a K
ST
starting overload coeffi cient depend-
ing on the DThCLP Mode setting. The CLP Source parameter is common for profi les A and B
All elements can be enabled or disabled by setting ON or OFF the DThetaAL1 Enable, DTheta-
AL2 Enable and/or DTheta> Enable parameters inside the Set \ Profi le A(or B) \ Thermal image-
49MG \ DthAL1 Element (DthAL2 Element, Dth> Element) menus
The trip element (Dth>) may be inhibited when a start of at least one of the overcurrent element
(50/51) is active, if the Dth>disby50-51 parameter is set ON inside the Set \ Profi le A(or B) \ Ther-
mal image-49MG \ Dth> Element menu.
The Dth
IN
parameter sets a minimum level of previous thermal image Dθ
p
when the protection relay
is powered or when a remote (binary input) or local (keyboard or ThySetter) command is issued.
The DthIN parameter may be adjusted inside the Set \ Profi le A(or B) \ Thermal image-49MG \
Common confi guration menu.
To active the Dth
IN
preset value remotely, a binary input must be programmed as Init DTheta func-
tion inside the Set \ Board 1(2) inputs \ Binary input IN1-1...(IN1-x) menus.
The trip element can produce the Breaker Failure output if the Dth> BF parameters is set to ON. The
parameter is available inside the Set\Profi le A(or B) \ Thermal image-49MG \ Dth> Element menu.
[1]
The IB setting is adjustable inside the Set \ Profi le A(or B) \ Base current IB menu.
For every threshold the following block criteria are available:
Logical block (Block1)
If the DthAL1BLK1, DthAL2BLK1 and/or Dth>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)
\Thermal image-49MG \ DthAL1 Element (DthAL2 Element, Dth> Element) menus, while the Block1
function must be assigned to the selected binary input inside the Set \ Board1(2) inputs \ Binary input
IN1-1...INx-x menus.
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 DthAL1BLK2IN, DthAL2BLK2IN and/or Dth>BLK2IN parameter are 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.
[3]
The enable DthAL1BLK2IN, DthAL2BLK2IN and/or Dth>BLK2IN parameters are
available inside the Set \ Profi le A(or B) \ Thermal image-49MG \ DthAL1 Element, (DthAL2 Element,
Dth> Element) menus, while the Block2 Iph and Block2 Iph/IE functions must be assigned to the
selected binary inputs inside the Set \ Board1(2) inputs \ Binary input IN1-1...INx-x menus.
Use of committed pilot wire output BLOUT1:
The information about phase or phase+earth block may be select programming the ModeBLOUT1
parameter inside Set \ Profi le A(or B) \ Selective block-BLOCK2 \ Selective block OUT menus.
Use of output relay:
If the DthAL1BLK2OUT, DthAL2BLK2OUT and/o Dth>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), when-
ever the given element (DthAL1, DthAL2 e/o Dth>) becomes active. The enable DthAL1BLK2OUT,
DthAL2BLK2OUT and/or Dth>BLK2OUT parameters are available inside the Set \ Profi le A(or
B)\ Thermal image-49MG \ DthAL1 Element (DthAL2 Element, Dth> Element) menus, while the BLK-
2OUT-Iph-K, BLK2OUT-Iph/IE-K and/or BLK2OUT-IE-K output relays must be set inside the
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
•
•
•
•
•
•
•
•
To Next Page
Loading...
