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NVA100X-D - Manual - 02 - 2016
FUNCTION CHARACTERISTICS
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 (ON-Change setting = IEDCCLP> Mode, IEDCCLP>> Mode, IEDC-
CLP>>> Mode, IEDCCLP>>>> Mode) and the concerning operating time within the CLP
(tEDCLP>, tEDCLP>>, tEDCLP>>>, tEDCLP>>>>) may be adjusted inside the Set \ Pro-
fi le A(or B) \ Directional earth fault overcurrent-67N(Comp) \ IEDC> Element (IEDC>> Element,
IEDC>>> Element, IEDC>>> Element) \ Setpoints menus, whereas the operating thresholds within
the CLP ( IEDCCLP>def, IEDCCLP>inv,....) may be adjusted inside the Set \ Profi le A(or B) \
Directional earth fault overcurrent-67N(Comp) \ IEDC> Element (IEDC>> Element, IEDC>>> Element,
IEDC>>> Element) \ Defi nite time (Inverse time) menus.
For every of the four thresholds the following block criteria are available:
Logical block (Block1)
If the IEDC>BLK1, IEDC>>BLK1, IEDC>>>BLK1 and/or IEDC>>>>BLK1 enabling param-
eters 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.
[1]
The enabling parameters are available inside the
Set \ Profi le A(or B) \ Directional earth fault overcurrent-67N(Comp) \ IEDC> Element (IEDC>> Ele-
ment, IEDC>>> Element, IEDC>>> Element) \ Setpoints menus, while the Block1 function must be
assigned to the selected binary input inside the Set \ Board 1(2) inputs \ Binary input IN1-1...(IN1-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 IEDC>BLK2IN, IEDC>>BLK2IN, IEDC>>>BLK2IN and/or IEDC>>>>BLK2IN
parameters are 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.
[2]
The enable IEDC>BLK2IN, IEDC>>BLK2IN,
IEDC>>>BLK2IN and/or IEDC>>>>BLK2IN parameters are available inside the Set \ Pro-
fi le A(or B) \ Directional earth fault overcurrent-67N(Comp) \ IEDC> Element (IEDC>> Element,
IEDC>>> Element, IEDC>>>> Element) \ Setpoints menus, while the Block2 Iph and Block2 Iph/
IE functions must be assigned to the selected binary inputs inside the Set \ Board 1(2) inputs \
Binary input IN1-1...(IN1-x) menus.
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:
If the IEDC>BLK2OUT, IEDC>>BLK2OUT, IEDC>>>BLK2OUT and/or
IEDC>>>>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 IEDC>, Start
IEDC>>, Start IEDC>>> and/or Start IEDC>>>>) becomes active. The enable IEDC>BLK2OUT,
IEDC>>BLK2OUT, IEDC>>>BLK2OUT and/or IEDC>>>>BLK2OUT parameters (ON or
OFF) are available inside the Set \ Profi le A(or B) \ Directional earth fault overcurrent-67(Comp) \
IEDC> Element (IEDC>> Element, IEDC>>> Element, IEDC>>>> 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.
Note 1 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 2 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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