TECHNICAL DATA
23
NVA100X-D - Manual - 02 - 2016
Phase overcurrent - 50/51 side H
I
(H)
> Element
I
(H)
> Curve type (
I
(H)
>
Curve
)
DEFINITE,
IEC/BS A, B, C, LIT, ANSI/IEEE MI, VI, EI
RECTIFIER,
I
2
t or EM
CLP operating mode (
I
(H)CLP>
Mode)
OFF/ON-Element blocking/ON-Change setting
CLP activation time (
t
(H)CLP>
)
0.00...100.0
s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Reset time delay (
t
(H)
>
RES
)
0.00...100.0
s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Defi nite time
First threshold defi nite time (
I
(H)
>
def
)
0.100...40.0
I
nH
0.100...0.999
I
n
(step 0.001
I
nH
)
1.00...9.99
I
n
(step 0.01
I
nH
)
10.0...40.0
I
n
(step 0.1
I
nH
)
First threshold within CLP (
I
(H)CLP>def
)
0.100...40.0
I
nH
0.100...0.999
I
n
(step 0.001
I
nH
)
1.00...9.99
I
n
(step 0.01
I
nH
)
10.0...40.0
I
n
(step 0.1
I
nH
)
Operating time (
t
(H)
>
def
) 0.04...200.00
s
0.04...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...200 s (step 1 s)
Inverse time
[1]
First threshold inverse time (
I
(H)
>
inv
)
0.100...20.00
I
nH
0.100...0.999
I
n
(step 0.001
I
nH
)
1.00...20.00
I
n
(step 0.01
I
nH
)
First threshold
within CLP (
I
(H)CLP>inv
)
0.100...20.00
I
nH
0.100...0.999
I
n
(step 0.001
I
nH
)
1.00...20.00
I
n
(step 0.01
I
nH
)
Operating time (
t
(H)
>
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
(H)
>> Element
Curve type (
I>>
Curve
)
DEFINITE
or
I
2
t
CLP operating mode (
I
(H)CLP
>>
Mode)
OFF/ON-Element blocking/ON-Change setting
CLP activation time (
t
(H)CLP>>
)
0.00...100.0
s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Reset time delay (
t
(H)
>>
RES
)
0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Defi nite time
Second threshold defi nite time (
I
(H)
>>
def
)
0.100...40.0
I
nH
0.100...0.999
I
n
(step 0.001
I
nH
)
1.00...9.99
I
n
(step 0.01
I
nH
)
10.0...40.0
I
n
(step 0.1
I
nH
)
Second threshold
within CLP (
I
(H)CLP>>def
)
0.100...40.00
I
nH
0.100...0.999
I
n
(step 0.001
I
nH
)
1.00...9.99
I
n
(step 0.01
I
nH
)
10.0...40.0
I
n
(step 0.1
I
nH
)
Operating time (
t
(H)
>>
def
)
0.03...10.00 s (step 0.01 s)
Inverse time
Second threshold inverse time (
I
(H)
>>
inv
) 0.100...20.00
I
nH
0.100...0.999
I
n
(step 0.001 I
nH
)
1.00...20.00
I
n
(step 0.01 I
nH
)
Note 1
Standard Inverse Time (IEC 255-3/BS142 type A or SIT):
t = 0.14 · t
(H)
>
inv
/ [(I/I
(H)
>
inv
)
0.02
- 1]
Very Inverse Time (IEC 255-3/BS142 type B or VIT):
t = 13.5 · t
(H)
>
inv
/ [(I/I
(H)
>
inv
) - 1]
Extremely Inverse Time (IEC 255-3/BS142 type C or EIT):
t = 80 · t
(H)
>
inv
/ [(I/I
(H)
>
inv
)
2
- 1]
Very Inverse Time (IEC 255-3/BS142 type B or LIT):
t = 120 · t
(H)
>
inv
/ [(I/I
(H)
>
inv
) - 1]
Moderately Inverse (ANSI/IEEE type MI):
t = t
(H)
>
inv
· {0.01 / [(I/I
(H)
>
inv
)
0.02
- 1] + 0.023}
Very Inverse (ANSI/IEEE type VI):
t = t
(H)
>
inv
· {3.922 / [(I/I
(H)
>
inv
)
2
- 1] + 0.098}
Extremely Inverse (ANSI/IEEE type EI):
t = t
(H)
>
inv
· {5.64 / [(I/I
(H)
>
inv
)
2
- 1] + 0.024}
I-squared-t
(I
2
t = K):
t = 16 · t
(H)
>
inv
/ (I/I
(H)
>
inv
)
2
Electromechanical (EM):
t = 0.28 · t
(H)
>
inv
/ [-0.236 · (I/I
(H)
>
inv
)
-1
+ 0.339]
RECTIFIER (RI):
t = 2351 · t
(H)
>
inv
/ [(I/I
(H)
>
inv
)
5.6
- 1]
t
:
operate time, minimum operate time:
0.1 s
I
(H)
>
inv
:
pickup value
t
(H)
>
inv
:
operate time setting
Asymptotic reference value:
1.1
I
(H)
>
inv
Equation is valid for 1.1 ≤ I/I
(H)
>
inv
≤ 20; the upper limit is
50
I
nH
—
