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4 Technical Data
4.5
Unbalanced Load (Negative Sequence) Protection (ANSI 46)
Setting Ranges/
Resolutions
Trip Characteristic
Inherent Operating
Times
Dropout
Tolerances
Influencing
Variables for
Pickup
414
Permissible Unbalanced Load I
(Warn. Stage too)
Tripping Stage (Definite Time)I
Delay Times
Asymmetry Factor
Time for Cool Down
Trip Characteristic of the Thermal Replica
Where:
Pickup Times
Warning Stage I
>, Tripping Stage I
2
Dropout Times
Warning Stage I
>, Tripping Stage I
2
Warning Stage I
>, Tripping Stage I
2
Thermal Replica
Pickup Values I
>, I
>>
2
2
Delay Times T
Thermal Replica for 2 ≤ I
Power Supply Direct Voltage in Range
0.8 ≤ U
/ U
PS
PS nominal
Temperature in Range
23 °F ≤ ϑ
≤ 131 °F
amb
–5 °C ≤ ϑ
≤ 55 °C
amb
Frequency in Range
0.95 ≤ f/f
≤ 1.05
N
Harmonic Currents
– Up to 10 % 3rd Harmonics
– Up to 10 % 5th Harmonics
>/I
3.0 % to 30.0 %
2
N
>>/I
10 % to 100 %
2
N
T(I
>), T(I
>>) 0.00 s to 60.00 s
2
2
or ∞ (does not expire)
K
2.0 s to 100.0 s
T
0 s to 50000 s
Cool down
refer also to Figure 4-5
t
=
t
K
I
2
I
N
I
2 perm.
>> Approx. 50 ms
2
>> Approx. 50 ms
2
>> Approx. 0.95
2
drop-off at I
3 % of setting value or 0.3 % unbal. load
1 % of setting value or 10 ms
≤ 20
/I
5 % of reference (calculated) value + 1 %
2
2 perm.
current tolerance, or 600 ms
≤ 1.15
1 %
0.3 % / 10 °F
0.5 % / 10 K
1 %
1 %
1 %
(Increments 0.1 %)
(Increments 1 %)
(Increments 0.01 s)
(Increments 0.1 s)
(Increments 1 s)
K
--------------------- -
2
(
⁄
)
I
I
2
N
– Tripping time
– Asymmetry factor
– Negative sequence current
– Nominal current of the device
– Continuously permissible negative
sequence current
< I
2
2 perm.
C53000-G1176-C149-3
7UM62 Manual
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