Stator current, Reactive power, Protection functions – Basler Electric DECS-400 User Manual

Page 177: Field overvoltage, Field overcurrent, Generator undervoltage, Generator overvoltage, Loss of sensing voltage, Generator underfrequency, Loss of field (40q)

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9369700990 Rev R

165

Stator Current

Single- or three-phase summing-point limiter with PI control loop. Limiter has two steps…High and Low.
Setpoint Range

High, Low ................................ 100 to 300% of nominal generator output current

Definite Time Delay

High ........................................ 0 to 60 s, 1 s increments

Reactive Power

The reactive power limiter ensures that the level of var flow out of the generator does not exceed its
capability.
Setting Range (Lagging kvar)…… Determined by rated kVA specified for the controlled machine: from 0

to current value of generator rating in 1 kvar increments.

Time Delay .................................... 0 to 10 s

Protection Functions

Field Overvoltage

Setting Range ............................... 1 to 2,000 Vdc
Time Delay .................................... 0.2 to 30 s

Field Overcurrent

Setting Range ............................... 0.1 to 9,999 Adc
Time Delay .................................... 0.1 to 20 s

Generator Undervoltage

Setting Range ............................... 0 to 34,500 Vac
Time Delay .................................... 0.5 to 60 s

Generator Overvoltage

Setting Range ............................... 0 to 34,500 Vac
Time Delay .................................... 0.1 to 60 s

Loss of Sensing Voltage

Pickup Level .................................. 0 to 100%, balance or imbalance condition
Time Delay .................................... 0 to 30 s

Generator Underfrequency

Pickup Level .................................. Fixed at 10 Hz
Time Delay .................................... N/A

Loss of Field (40Q)

Setting Range ............................... 0 to 3,000 Mvar
Time Delay .................................... 0 to 9.9 s

Field Overtemperature

Calculated from field voltage and current data.

Setting Range ............................... 0 to 572

°C

Time Delay .................................... 0.1 to 60 s

DECS-400

Specifications

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