BASLER ELECTRIC DECS-250-LN1SN1N DIGITAL EXCITATION CONTROL SYSTEM
BASLER ELECTRIC DECS-250-LN1SN1N DIGITAL EXCITATION CONTROL SYSTEM
Metered Frequency Values and Accuracy
Range ………………………………………………………………….. 10 to 75 hertz
Accuracy ………………………………………………………………. ±0.01 hertz, ±1 least significant digit at 25°C
Minimum Frequency Tracking Voltage ……………………… 10 V RMS
3-wire Sensing Input ………………………………………………. Phase A – B
4-wire Sensing Input ………………………………………………. Phase A – Neutral
Slip Frequency
Range ………………………………………………………………….. ±10 hertz
Accuracy ………………………………………………………………. ±0.01 hertz, ±1 least significant digit at 25°C
Phase Angle
Range ………………………………………………………………….. –180° to 0° to +180°
Accuracy ………………………………………………………………. ±0.5°
Calculated Values and Accuracy
Demand
Range ………………………………………………………………….. 0.1 to 1.5 nominal
Type …………………………………………………………………….. Exponential
Accuracy ………………………………………………………………. ±1% of reading, ±1 digit at 25°C
Temperature Dependence ………………………………………. ≤ ±0.02% per °C
Interval …………………………………………………………………. 1 to 60 minutes
True Power
5 Ampere CT Range ………………………………………………. −7.500 W to +7.500 W
1 Ampere CT Range ………………………………………………. −1.500 W to +1.500 W
Accuracy ………………………………………………………………. ±1% at unity power factor
Reactive Power
5 Ampere CT Range ………………………………………………. −7.500 var to +7.500 var
1 Ampere CT Range ………………………………………………. −1.500 var to +1.500 var
Accuracy ………………………………………………………………. ±1% at zero power factor
Energy Data Reporting
5 Ampere CT Range ………………………………………………. 1.000.000 kWh or 1.000.000 kvarhr
1 Ampere CT Range ………………………………………………. 1.000.000 kWh or 1.000.000 kvarhr
Units of Measure ……………………………………………………. kilo, mega, giga
Rollover Value of Registers …………………………………….. 1.000.000 kWh or 1.000.000 kvarhr
Accuracy ………………………………………………………………. ±1% at unity power factor
24 Overexcitation Protection
Pickup
Setting Range ……………………………………………………….. 0.5 – 6V/Hz
Time Delay
Delay Time ……………………………………………………………. Inverse Squared Curve
( )2
T T 1 M
D T
−
=
TT
= Time Trip
DT
= Time Dial, Trip
V/Hz Pickup
V/Hz Actual M=
25 Sync-Check Protection
Settings
Delta Phase Angle
Setting Range ……………………………………………………….. 1 to 99°
Accuracy ………………………………………………………………. ±0.5°
Delta Voltage Magnitude
Setting Range ……………………………………………………….. 1 to 20 V
Accuracy ………………………………………………………………. ±2% or ±1 V, whichever is greater
Delta Frequency
Setting Range ……………………………………………………….. 0.01 to 0.50 Hz
Accuracy ………………………………………………………………. ±0.01 Hz
27P Phase Undervoltage Protection
Pickup
Setting Range ……………………………………………………….. 10 to 300 V
Accuracy ………………………………………………………………. ±2% of setting or ±1 V, whichever is greater
Dropout/Pickup Ratio ……………………………………………… 102%
Time Delay
Setting Range ……………………………………………………….. 0.05 to 600 s
Accuracy ………………………………………………………………. ±0.5% or +3.6/–1.9 cycles, whichever is greater
27X Auxiliary Undervoltage Protection
Pickup
Setting Range ……………………………………………………….. 1 to 150 V
Accuracy ………………………………………………………………. ±2% of setting or ±1 V, whichever is greater
Dropout/Pickup Ratio ……………………………………………… 102%
Time Delay
Setting Range ……………………………………………………….. 0.05 to 600 s
Accuracy ………………………………………………………………. ±0.5% or ±1 cycle, whichever is greater
40Q Loss of Excitation Protection
Pickup
5 Ampere CT Setting Range …………………………………… 1 to 6.000 vars, 3-phase
1 Ampere CT Setting Range …………………………………… 1 to 1.200 vars, 3-phase
Accuracy ………………………………………………………………. ±3%
Time Delay
Setting Range ……………………………………………………….. 0.05 to 600 s
Accuracy ………………………………………………………………. ±0.5% or ±3 cycles, whichever is greater
47 Negative-Sequence Overvoltage Protection
Pickup
Setting Range ……………………………………………………….. 1.0 to 300 VL-N
Accuracy ……………………………………………………………… ±2% of setting or ±1 V, whichever is greater
Dropout/Pickup Ratio ……………………………………………… 98%
Time Delay
Setting Range ……………………………………………………….. 0.050 to 600 s
Accuracy ………………………………………………………………. ±0.5% or ±1 cycle, whichever is greater
50T Instantaneous Overcurrent Protection
Pickup
5 Ampere CT Setting Range …………………………………… 0.5 to 150 A
1 Ampere CT Setting Range …………………………………… 0.1 to 30 A
Dropout/Pickup Ratio ……………………………………………… 95%
Accuracy
5 Ampere CT ………………………………………………………… ±2% or ±50 mA, whichever is greater
1 Ampere CT ………………………………………………………… ±2% or ±10 mA, whichever is greater
Time Delay
Setting Range ……………………………………………………….. 0 to 60 s
Accuracy
±0.5% or ±½ cycle, whichever is greater, plus trip time for instantaneous response (0.0 setting) ∗
∗ Trip Time for 0.0 Delay Setting
2¼ cycles maximum for currents ≥ 5 times the pickup setting. Three cycles maximum for a current of
1.5 times pickup. Four cycles maximum for a current of 1.05 times the pickup setting.
50BF Breaker Failure Protection
Pickup
Setting Range ……………………………………………………….. Fixed at 0.5 A for 5 A unit, 0.1 A for 1 A unit
Accuracy
5 Ampere CT ………………………………………………………… ±2% or ±50 mA, whichever is greater
1 Ampere CT ………………………………………………………… ±2% or ±10 mA, whichever is greater
Time Delay
Setting Range ……………………………………………………….. 50 to 999 ms
Accuracy ………………………………………………………………. ±0.5% or +1¼, −½ cycles, whichever is greater
Reset Time …………………………………………………………… Within 1¼ cycles of the current being removed