Thytronic DMC3S - Neutral Overcurrent - 51 N(E)

16
DMC3S - Manual - 08 - 2021
Threshold IE>>
Reset delay (t
E
>>
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
Second definite time threshold (I
E
>>
def
) 0.005...25.0 I
En
0.005...0.995 I
En
(step 0.005 I
En
)
1.00...9.99 I
En
(step 0.01 I
En
)
10.0...25.0 I
En
(step 0.1 I
En
Operating time (t
E
>>
def
) 0.05...1000 s
0.05...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...1000 s (step 1 s)
Shrink time trip (t
cIE
>>
def
) 0.05...1000 s
0.05...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...1000 s (step 1 s)
Shrink activation time (t
atcIE
>>
def
) 1...60 s (step 1 s)
Threshold IE>>>
Reset delay (t
E
>>>
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
Third definite time threshold (I
E
>>>
def
) 0.005...25.0 I
En
0.005...0.995 I
En
(step 0.005 I
En
)
1.00...9.99 I
En
(step 0.01 I
En
)
10.0...25.0 I
En
(step 0.1 I
En
Operating time (t
E
>>
def
) 0.05...1000 s
0.05...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...1000 s (step 1 s)
Shrink time trip (t
cIE
>>
def
) 0.05...1000 s
0.05...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...1000 s (step 1 s)
Shrink activation time (t
atcIE
>>
def
) 1...60 s (step 1 s)
— Neutral overcurrent - 51N(E)
Threshold INe>
Type of characteristic (I
Ne
>
Curve
) DEFINITE,
IEC/BS A, B, B-LI, C
Reset delay (t
Ne
>
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
First definite time threshold (I
Ne
>
def
) 0.005...25.0 I
En
0.005...0.995 I
En
(step 0.005 I
En
)
1.00...9.99 I
En
(step 0.01 I
En
)
10.0...25.0 I
En
(step 0.1 I
En
Operating time (t
Ne
>
def
) 0.05...1000 s
0.05...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...1000 s (step 1 s)
Shrink time trip (t
cINe
>
def
) 0.05...1000 s
0.05...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...1000 s (step 1 s)
Shrink activation time (t
atcINe
>>
def
) 1...60 s (step 1 s)
Inverse time
[1]
First inverse time threshold (I
Ne
>
inv
) 0.005...2.00 I
En
0.005...0.995 I
En
(step 0.005 I
En
)
1.00...2.00 I
En
(step 0.01 I
En
)
Note1 Inverse time curve IEC 255-3/BS142 (type A or SIT): t = 0.14 · t
Ne
>
inv
/ [(I
Ne
/I
Ne
>
inv
)
0.02
- 1]
Very inverse time curve IEC 255-3/BS142 (type B or VIT): t = 13.5 · t
Ne
>
inv
/ [(I
Ne
/I
Ne
>
inv
) - 1]
Long inverse time curve (IEC 255-3/BS B LTI): t = 120 · t
Ne
>
inv
/ [(I
Ne
/I
Ne
>
inv
) - 1]
Extremely inverse time curve IEC 255-3/BS142 (type C or EIT): t = 80 · t
Ne
>
inv
/ [(I
Ne
/I
Ne
>
inv
)
2
- 1]
t: operating time
t
Ne
>
inv
: operating time regulation
I
Ne
>
inv
: trip threshold regulation
I
Ne
: measured residual current
Asymptotic reference value: 1.1 I
ENe
>
inv
Minimum operating time: 0.1 s
Dynamic: 1.1 ≤ I
Ne
/I
Ne
>
inv
≤ 20;
With regulation I
Ne
>
inv
greater than 0.5 I
E
n
, the upper limit of the measurement range is 10 I
E
n