Thytronic NV021, Manual

Page: 16 / 146

16
NV021 - Manual - 08 - 2012
TECHNICAL DATA
Overvoltage - 59
Common confi guration:
59 Operating logic ( Logic 59) AND/OR
U> Element
U > Curve type ( U >
Curve
) DEFINITE/INVERSE
[1]
Defi nite time
59 First threshold defi nite time (
U>
def
) 0.50...1.50 U
n
(step 0.01 U
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
(step 0.01 U
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
Defi nite time
59 Second threshold defi nite time (
U>>
def
) 0.50...1.50 U
n
(step 0.01 U
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
Ten minutes overvoltage - 59Uavg
[2]
Common confi guration:
Operating logic ( Logic59Uavg ) AND/OR
Uavg> Element
Defi nite time
First threshold defi nite time (
U
avg
>
def
) 0.50...1.50 U
n
(step 0.01 U
n
)
Time delay ( t
Uavg
>
def
) 0...1000 s (step 1 s)
Pickup time according to the reference conditions
[3]
Pickup accuracy ± 1% ± 1% U
n
Time delay accuracy
[4]
5% ± 3 s
Negative sequence overvoltage - 59V2
U
2
> Element
Defi nite time
59V2 First threshold defi nite time ( U
2
>
def
) 0.01...0.50 U
n
(step 0.01 U
n
)
U
2
>
def
Operating time ( t
U2
>
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
n
Operate time accuracy 5% or ± 10 ms
Underfrequency (81U)
f< Element
Defi nite time
81U First threshold defi nite time ( f<
def
) 0.800...1.000 f
n
(step 0.001 f
n
)
f<
def
Operating time ( t
f
<
def
) 0.05...100.0 s
0.05...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Voltage control
f< Control enable ( f < & ) ON/OFF
f< Controlled by U
E
>> start ( f < &UE >>) ON/OFF
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 function is based on the measurement of the mean of the three phase voltages of 10 minutes with update every three seconds
Note 3 The pickup time depends on the initial and fi nal value of the input voltage; e.g. with a setting of threshold equal to 1.10 Un:
- with initial value 0 and fi nal value 1.1 Uavg> def (1.1x1.1 = 1.21 Un) the pickup time is 498 s
- with initial value 0.9 Uavg>def (0.9x1.1 = 0.99 Un) and fi nal value 1.1 Uavg>def (1.1x1.1 = 1.21 Un) the pickup time is 285 s
Note 4 Since the aggregate value is updated every 3 s, times are only meaningful in multiples of 3 s
—
—
—
•
•
—
•
•