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