Thytronic Pro-N NVA100X-D

130
NVA100X-D - Manual - 02 - 2016
FUNCTION CHARACTERISTICS
The second overcurrent element can be programmed with defi nite or inverse time characteris-
tic by setting the I> Time characteristic (I(H)>>Curve) parameter (DEFINITE, I2t) available
inside the Set \ Profi le A(or B) \ Phase overcurrent-50/51 side H \ I(H)> Element (I(H)>> Element,
I(H)>>> Element) \ Setpoints menu.
The trip of I(H)> element may be inhibited by the start of the second and/or third element
(I(H)>>, I(H)>>>) by setting ON the Disable I(H)> by start I(H)>>, Disable I(H)>> by start I(H)>>>
(I(H)>disbyI(H)>>, I(H)>disbyI(H)>>>) parameters available inside the Set \ Profi le A(or
B) \ Phase overcurrent-50/51 side H \ I(H)> Element (I(H)>> Element, I(H)>>> Element) \ Setpoints
menus.
Similarly the trip of the I(H)>> element may be inhibited by start of the third element (I(H)>>>) by
setting ON the Disable I(H)>> by start I(H)>>> (I(H)>>disbyI(H)>>>) parameter available
inside the Set \ Profi le A(or B) \ Phase overcurrent-50/51 side H \ I(H)> Element (I(H)>> Element,
I(H)>>> Element) \ Setpoints menu.
All the named parameters can be set separately for Profi le A and Profi le B (Set \ Profi le A(or B)
\ Phase overcurrent-50/51 side H \ I(H)> Element (I(H)>> Element, I(H)>>> Element) \ Setpoints
menus).
An adjustable reset time delay is provided for every threshold (t
(H)
>
RES
, t
(H)
>>
RES
, t
(H)
>>>
RES
).
Breaker failure (BF)
Each overcurrent element can produce the Breaker Failure output if the I(H)> BF, I(H)>> BF and/
or I(H)>>> BF parameters are set to ON. The parameters are available inside the Set \ Profi le
A(or B) \ Phase overcurrent-50/51 side H \ I(H)> Element (I(H)>> Element, I(H)>>> Element) \ Set-
points menus.
[1]
Second harmonic restraint
For all overcurrent elements, a block from the second harmonic restraint may be set by setting ON
the I>2ndh-REST, I>>2ndh-REST, I>>>2ndh-REST parameters inside the Set \ Profi le A(or
B) \ Phase overcurrent-50/51 side H \ I(H)> Element (I(H)>> Element, I(H)>>> Element) \ Setpoints
menus.
Cold load pickup
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 I(H)CLP> Mode,
I(H)CLP>> Mode and/or I(H)CLP>>> 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 I(H)CLP> Mode,
I(H)CLP>> Mode and/or I(H)CLP>>> Mode parameters, whereas the operating thresholds
within the CLP may be adjusted inside the Set \ Profi le A(or B) \ Phase overcurrent-50/51 side H \
I(H)> Element (I(H)>> Element, I(H)>>> Element) \ Defi nite time (Inverse time) menus.
For both operating modes the CLP Activation time parameters (tCLP>, tCLP>>, tCLP>>>) may
be adjusted inside the Set \ Profi le A(or B) \ Phase overcurrent-50/51 side H \ I(H)> Element (I(H)>>
Element, I(H)>>> Element) \ Setpoints menus.
For every of the three thresholds the following block criteria are available:
Logical block (Block1)
If the I(H)>BLK1, I(H)>>BLK1 and/or I(H)>>>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) \
Phase overcurrent-50/51 side H \ I(H)> Element (I(H)>> Element, I(H)>>> Element) \ Setpoints 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.
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
I> element phase overcurrent timers - 50/51 side H
Timers-F50-51.ai
I(H)> Start
I(H)> Trip
RESET
INPUT
t
(H)
>
RES
t
(H)
>
RES
t
(H)
>
RES
t
(H)
> t
(H)
>
t