Thytronic NA011, Manual, Page: 16 / 95

TECHNICAL DATA
16 NA011 - Manual - 05 - 2022
Inverse time
[1]
50/51 First threshold inverse time ( I >
inv
) 0.100...2.50 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...2.50 I
n
(step 0.01 I
n
)
I >
inv
within CLP ( I
CLP>inv
) 0.100...10.00 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...10.00 I
n
(step 0.01 I
n
) I >
inv
I >
inv
Operating time ( t >
inv
) 0.02...60.0 s
0.02...9.99 s (step 0.01 s)
10.0...60.0 s (step 0.1 s)
I>> Element
CLP Activation time ( t
CLP
>>
def
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
I >> Reset time delay ( t >>
RES
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50/51 Second threshold definite time ( I >>
def
) 0.100...20.0 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...9.99 I
n
(step 0.01 I
n
)
10.0...20.0 I
n
(step 0.1 I
n
)
I >>
def
within CLP ( I
CLP>def
) 0.100...20.0 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...9.99 I
n
(step 0.01 I
n
)
I >>
def
Operating time ( t >>
def
) 0.03...10.00 s (step 0.01 s)
I>>> Element
CLP Activation time ( t
CLP
>>>
def
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
I >>> Reset time delay ( t >>>
RES
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50/51 Third threshold definite time ( I >>>
def
) 0.100...20.0 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...9.99 I
n
(step 0.01 I
n
)
10.0...20.0 I
n
(step 0.1 I
n
)
I >>>
def
Operating time ( t >>>
def
) 0.03...10.00 s (step 0.01 s)
Pickup time ≤ 0.03 s
Dropout ratio 0.95...0.98
Dropout time ≤ 0.04 s
Overshoot time 0.03 s
Pickup accuracy ± 4% ± 1% I
n
Operate time accuracy 5% or ± 10 ms
Note 1
Standard Inverse Time (IEC 255-3/BS142 type A or SIT): t = 0.14 · t>
inv
/ [(I/I>
inv
)
0.02
- 1]
Very Inverse Time (IEC 255-3/BS142 type B or VIT): t = 13.5 · t>
inv
/ [(I/I>
inv
) - 1]
Extremely Inverse Time (IEC 255-3/BS142 type C or EIT): t = 80 · t>
inv
/ [(I/I>
inv
)
2
- 1]
Moderately Inverse (ANSI/IEEE type MI): t = t>
inv
· {0.01 / [(I/I>
inv
)
0.02
- 1] + 0.023}
Very Inverse (ANSI/IEEE type VI): t = t>
inv
· {3.922 / [(I/I>
inv
)
2
- 1] + 0.098}
Extremely Inverse (ANSI/IEEE type EI): t = t>
inv
· {5.64 / [(I/I>
inv
)
2
- 1] + 0.024}
I-squared-t (I
2
t = K): t = 16 · t>
inv
/ (I/I>
inv
)
2
where:
t : operate time
I>
inv
: pickup value
t>
inv
: operate time setting
Asymptotic reference value: 1.1 I >
inv
Minimum operate time: 0.1 s
Equation is valid for 1.1 ≤ I/I>
inv
≤ 20
With I>
inv
pickup ≥ 2.5 I
n
, the upper limit is 50 I
n