4 Technical Data
432
7UM62 Manual
C53000-G1176-C149-3
4.18
Overexcitation (Volt/Hertz) Protection (ANSI 24)
Setting Ranges/
Resolutions
Overexcitation
(Ratio
)
1.00 to 1.20
(Increments 0.01)
(Warning Stage)
Overexcitation
(Ratio
)
1.00 to 1.40
(Increments 0.01)
(Stepped Characteristic)
Time Delay
T
0.00 s to 60.00 s
(Increments 0.01 s)
(Warning Stage
and Stepped Charact.
or
∞
(does not expire)
Pair of Values for
Characteristic of
U/f
1.05 / 1.10 / 1.15 / 1.20 / 1.25 /
1.30 / 1.35 / 1.40
Thermal Replica
T
0 s to 20 000 s
(Increments 0.01 s)
Time for Cool Down
T
COOL DOWN
0 s to 20 000 s
(Increments 1 s)
Inherent Operating
Times
Warning Stage and Stepped Characteristic
– Pickup Times at 1.1 Times
Approx. 60 ms
setting value
– Dropout Times
Approx. 60 ms
Dropout
Dropout/Pickup
Approx. 0.95
Tripping time
characteristic
Thermal Replica acc. to Presettings
Refer to Figure 4-13
Tolerances
Pickup on U/f
3 % of setting value )
Delay Times T
1 % of setting value or 10 ms
Thermal Replica
5 %, related to U/f ± 600 ms
Influencing
Variables for
Pickup
Power Supply Direct Voltage in Range
0.8
≤
U
PS
/ U
PS nominal
≤
1.15
1 %
Temperature in Range
23 °F
≤ ϑ
amb
≤
131 °F
0.3 % / 10 °F
–5 °C
≤ ϑ
amb
≤
55 °C
0.5 % / 10 K
Frequency in Range
0.95
≤
f/f
N
≤
1.05
< 1 %
Harmonic Currents
– Up to 10 % 3rd Harmonics
< 1 %
– Up to 10 % 5th Harmonics
< 1 %
U / U
N
f / f
N
>
U / U
N
f / f
N
>
