FUNCTION CHARACTERISTICS
111
NVA100X-D - Manual - 02 - 2016
The fi rst overcurrent element can be programmed with defi nite or inverse time characteristic by
setting the
I2>Curve
parameter (
DEFINITE, IEC/BS A, IEC/BS B, IEC/BS C, ANSI/IEE MI,
ANSI/IEE VI, ANSI/IEE EI, I2t, EM
) available inside the
Set \ Profi le A(or B) \ Negative sequence
overcurrent - 46 \
I2> Element \ Setpoints
menu.
The trip of
I2
> element may be inhibited by the start of the second element (
I2
>>) by set-
ting
ON
the Disable I2> by start I2>> (
I2>disbyI2>>
) parameter available inside the
Set \ Profi le A(or B) \ Negative sequence overcurrent-46 \ I2>> Element \ Setpoints
menu.
All the parameters can be set separately for
Profi le A
and
Profi le B
(
Set \ Profi
le
A(or B) \ Negative sequence overcurrent - 46 \
I2> Element
(
I2>> Element) \ Setpoints
menus).
An adjustable reset time delay is provided for every threshold (
t
2
>
RES
,
t
2
>>
RES
).
Each element 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) \ negative sequence
overcurrent - 46 \
I2> Element
(
I2>> Element) \ Setpoints
menus.
[1]
Note 1 The common settings concerning the Breaker failure protection are adjustable inside the
Breaker Failure - BF
menu.
Timers-F46M.ai
I2> Start
I2> Trip
t
2
>
t
2
>
RESET
INPUT
t
2
>
RES
t
2
>
RES
t
2
>
RES
t
I2> element timers - 46M
all-F46M.ai
I
2
BLK1I2>>
I2>> Element
BLK2OUT
Start I2>>
Start I2>>
Trip I2>>
&
I2> disbyI>>
&
I2>>BLK1
&
I2>>BLK2IN
t2>>
def
I2CLP>>
def
I2>>
def
t2CLP>>
t2>>
RES
I2>> Enable
I2> inhibition
Block1
BLK1I2>
CLPI2>
CLPI2>>
I
2
I2> Element
BLK2OUT
BLK2INI2>
BLK2INI>>
Start I2>
Trip I2>
&
I2>BLK1
Block2
&
I2>BLK2IN
I2>BLK2OUT
I2>>BF
I2>> Trip
&
I2>>BF
I2>BF
Trip I2>
&
I2>BF
Start I2>
&
I2>>BLK2OUT
Start I2>> &
Block1
Block2
t2>
def
I2CLP>
def
I2>
def
t2>
inv
I2CLP>
inv
I2>
inv
I2>Curve
t2CLP>
t2>
RES
I2> Enable
Start I2>
&
Start I2>>
&
Start I2>>
&
Start I2>
&
General logic diagram of the negative sequence overcurrent elements - 46M
I2CLP>Mode
Starting control set
Change setting
Element blocking
OFF
I2CLP>>Mode
Starting control set
Change setting
Element blocking
OFF