Thytronic NV10B - Overvoltage Protection Details; Residual Overvoltage and Breaker Failure

TECHNICAL DATA
17
NV10B - Manual - 04 - 2022
U> Element
U> Curve type (U>
Curve
) DEFINITE/INVERSE
[1]
Definite time
59 First threshold definite time (
U >
def
) 0.50...1.50 U
n
/E
n
(step 0.01 U
n
/E
n
)
U>
def
Operating time (t
U
>
def
) 0.03...100.0 s
0.03...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Inverse time
59 First threshold inverse time (
U >
inv
) 0.50...1.50 U
n
/E
n
(step 0.01 U
n
/E
n
)
U>
inv
Operating time (t
U
>
inv
) 0.10...100.0 s
0.10...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
U>> Element
Definite time
59 Second threshold definite time (
U >>
def
) 0.50...1.50 U
n
/E
n
(step 0.01 U
n
/E
n
)
U>>
def
Operating time (t
U
>>
def
) 0.03...100.0 s
0.03...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Pickup time ≤ 0.04 s
Dropout ratio 0.95...0.98
Dropout time ≤ 0.04 s
Overshoot time 0.03 s
Pickup accuracy ± 1% ± 1% U
n
/E
n
Operate time accuracy 5% or ± 10 ms
 Residual overvoltage - 59N
Common configuration:
Residual voltage measurement type for 59N - direct/calculated (
3 Vo
Type59N
) U
E
/U
EC
U
E
> Element
U> Curve type (U>
Curve
) DEFINITE/INVERSE
[2]
U
E
> Reset time delay (t
UE>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
59N First threshold definite time (
U
E
>
def
) 0.01...0.70 U
En
(step 0.01 U
En
)
U
E
>
def
Operating time (t
UE
>
def
) 0.07...100.0 s
0.07...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Inverse time
59N First threshold inverse time (
U
E
>
inv
) 0.01...0.50 U
En
(step 0.01 U
En
)
U
E
>
inv
Operating time (t
UE
>
inv
) 0.10...100.0 s
0.10...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Element
U
E
>>
U
E
>> Reset time delay (t
UE>>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
59N Second threshold definite time (
U
E
>>
def
) 0.01...0.70 U
En
(step 0.01 U
En
)
U
E
>>
def
Operating time (t
UE
>>
def
) 0.07...100.0 s
0.07...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Pickup time ≤ 0.04 s
Dropout ratio 0.95...0.98
Dropout time ≤ 0.04 s
Overshoot time 0.03 s
Pickup accuracy ± 1% ± 1% U
En
Operate time accuracy 5% or ± 10 ms
 Breaker failure - BF
BF Time delay (t
BF)
0.06...10.00 s (step 0.01 s)
Dropout ratio 0.95...0.98
Dropout time ≤ 0.05 s
Operate time accuracy 5% or ± 10 ms
Note 1 The mathematical formula for INVERSE curve is: t = (0.5 ∙ t
U
>
inv
) / [(U/U>
inv
) - 1]
t = operating time (in seconds)
t
U
>
inv
= operating time setting (in seconds)
U = input voltage
U>
inv
= threshold setting
Note 2 The mathematical formula for INVERSE curve is t= (0.5 ∙ t
UE
>
inv
) / [(U
E
/U
E
>
inv
) - 1]
t = operating time (in seconds)
t
UE
>
inv
= operating time setting (in seconds)
U
E
= residual input voltage (direct or calculated)
U
E
>
inv
= threshold setting