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164
NVA100X-D - Manual - 02 - 2016
FUNCTION CHARACTERISTICS
setting
ON
the Disable IE(H)>> by start IE(H)>>> (
IE
(H)
>>disbyIE
(H)
>>>
) parameter available
inside the
Set \ Profi le A(or B) \ Calculated residual overcurrent-50N(Comp)/51N(Comp) side H \
IE(H)>>> Element
\ Setpoints
menus for side H element, the
IE
(L)
>>disbyIE
(L)
>>>
parameter
available inside the
Set \ Profi le A(or B) \ Calculated residual overcurrent-50N(Comp)/51N(Comp)
side L \
IE(L)>>> Element
\ Setpoints
menus for side L element and the
IE
(T)>
>disbyIE
(T)
>>>
parameter available inside the
Set \ Profi le A(or B) \ Calculated residual overcurrent-50N(Comp)/
51N(Comp) side T \
IE(T)>>> Element
\ Setpoints
menus for side T element.
All the parameters can be set separately for
Profi le A
and
Profi le B
E’ regolabile un tempo di ripristino costante per ciascuna delle soglie (
t
E(H)
>
RES
,
t
E(H)
>>
RES
,
t
E(H)
>>>
RES
per il lato H e
t
E(L)
>
RES
,
t
E(L)
>>
RES
,
t
E(L)
>>>
RES
per il lato L).
Breaker failure (BF)
Each calculated residual overcurrent element can produce the Breaker Failure output if the
IEC>
BF, IEC>> BF
e
IEC>>> BF
. are set to
ON.
The parameters are available inside the
Set \ Profi le
A(or B) \ Calculated residual overcurrent-50N(Comp)/51N(Comp) \
IEC> Element
(
IEC>> Element
,
IEC>>> Element) \ Setpoints
menus.
[1]
Second harmonic restraint
For all elements, a block from the second harmonic restraint may be set by setting
ON
the
IEC>2ndh-
REST, IEC>>2ndh-REST, IEC>>>2ndh-REST
.
The parameters are available inside the
Set \ Profi le A(or B) \ Residual overcurrent-50N(Comp)/
51N(Comp) \
IEC> Element
(
IEC>> Element
,
IEC>>> Element) \ Setpoints
menus.
Cold load pickup (CLP)
If the CLP function (Cold Load Pick-up) is enabled for
element blocking
, the element may be blocked
for an adjustable time interval, starting from circuit breaker closure.
If the CLP function (Cold Load Pick-up) is enabled for
setting change
, the selected threshold may be
changed for an adjustable time interval, starting from the circuit breaker closure.
The operating mode may be select by setting
ON-Element blocking
or
ON-Change setting
the
IECCLP> Mode, IECCLP>> Mode, IECCLP>>> Mode
parameter.
The operating modes and the CLP Activation time parameters
(
tECCLP>, tECCLP>>
e
tEC-
CLP>>>
) may be adjusted inside the
Set \ Profi le A(or B) \ Residual overcurrent-50N(Comp)/
51N(Comp) \
IEC> Element
(
IEC>> Element
,
IEC>>> Element) \ Setpoints
menus.
The threshold inside CLP (
IECCLP>def, IECCLP>inv,....
) can be set inside the
Set \ Profi le A(or B)
\ Residual overcurrent-50N(Comp)/51N(Comp) \
IEC> Element
(
IEC>> Element
,
IEC>>> Element) \ Def-
inite time (Inverse time)
menus.
For every of the four thresholds the following block criteria are available:
Logical block (Block1)
If the
IEC>BLK1, IEC>>BLK1
and/or
IEC>>>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) \
Residual overcurrent-50N(Comp)/51N(Comp) \
IEC> Element
(
IEC>> Element
,
IEC>>> Element) \ Set-
points
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).
Note 1 The common settings concerning the Breaker failure protection are adjustable inside the
Breaker Failure - BF
menu.
Note 2 The description of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside
CONTROL AND MONITORING
section
•
•
•
IEC> element residual overcurrent 50N(Calc)/51N(Calc) - Timers
IE
C
> Start
IE
C
> Trip
RESET
INPUT
t
EC
t
EC
t
EC>RES
t
EC>RES
t
EC>RES
t