Basler ElectricDECS-200-1C Digital Excitation Control System

(e.g. -set point PF=0.80, PF regulation is from 0.78 to 0.82 PF.)

Internal autotracking(optional): ±0.5% of the nominal field voltage change when transferring.

PARALLEL COMPENSATION Can use either reactive droop or reactive differential (cross-current) compensation. Adjustable from 0 to 30% of the rated generator voltage droop with optional 1 ampere or less or 5 amperes

or less input. Line drop compensation uses this same parameter; however, it is adjustable from -30% to 0.

FIELD OVERVOLTAGE PROTECTION Adjustable in increments of 1.0Vdc from 1.0 to 325Vdc rated output

voltage with a 0.2 to a 0.2 to 30 second inverse time delay settable in increments of 0.1 second.

FIELD OVERCURRENT PROTECTION Adjustable in increments of 0.1Adc steps of rated field current from 0 to

16Adc excitation current setting with an inverse time delay (ANSI C50.13).

EXCITER DIODE MONITOR (EDM) The DECS-200's EDM can detect open and shorted diodes on brushless

generators. To do this, the DECS-200 requires the user to input the number of generator poles and the number of

exciter poles (both adjustable from 0 to 20 in increments of 2). The open and shorted diode ripple threshold is

adjustable from 0 to 100% of field current. The open diode protection time delay is adjustable from 10 to 60

seconds, and the shorted diode protection time delay is adjustable from 5 to 30 seconds.

GENERATOR UNDERVOLTAGE PROTECTION Adjustable in increments of 1Vac from 0 to 30kV sensing voltage

setting with a 0.5 to 60 second time delay (ANSI C50.13) settable in increments of 0.1 sec.

GENERATOR OVERVOLTAGE PROTECTION Adjustable in increments of 1Vac from 0 to 30kV sensing voltage

with a 0.1 to 60 second time delay (ANSI C50.13) settable in increments of 0.1 second.

GENERATOR LOSS OF FIELD PROTECTION Adjustable in increments of 1 kVar from 0 to 3,000Mvar, with a

0.1 to 9.9 second delay settable in increments of 0.1 second.

LOSS OF SENSING The loss of sensing setting for both balanced and unbalanced generator voltage is adjustable from 0 to 100% of nominal generator voltage. The protection delay is adjustable from 0 to 30 seconds in 0.1

increments.

SOFT START Functional in AVR and FCR with an adjustable rate of 1 to 7200 seconds in one second increments.

SUMMING POINT and TAKEOVER TYPE

OVEREXCITATION LIMITING Limiter response time is less than three cycles.

SUMMING POINT TYPE:

On-Line High Current Level (instantaneous) set point adjustable from 0 to 30.0Adc in 0.1Adc increments. Limiting occurs for a time period ranging from 0 to 10 sec., settable in 1 sec. increments.

Medium Current Level set point adjustable from 0 to 20Adc in 0.1Adc increments.

Limiting occurs for a time period ranging from 0 to 120 seconds, settable in 1 sec. increments.

Low Current Level set point adjustable from 0 to 15Adc in 0.1Adc increments. Limiting occurs

SPECIFICATIONS, continued

Off-Line High Current Level (instantaneous) set point adjustable from 0 to 30Adc in 0.1Adc increments.

Limiting occurs for a time period ranging from 0 to 10 seconds, settable in 1 second increments.

Low Current Level set point adjustable from 0 to 15Adc in 0.1Adc increments. Limiting occurs indefinitely.

TAKEOVER TYPE OEL: The Takeover OEL uses an I2

t characteristic.

On-Line High Level: High Current Level (instantaneous) set point is adjustable from 0 to 30.0Adc in 0.1

Adc increments.

Low Level: Low Current set point is adjustable from 0 to 15.0Adc in 0.1Adc increments. Limint

occurs indefinitely.

Time Dial - This setting determines the inverse time curve selected.

Off-Line High Level - High current level (instantaneous) set point is adjustable from 0 to 30.0Adc in

0.1Adc increments.

Low Level - Low current set point is adjustable from 0 to 15.0Adc in 0.1Adc increments. Limiting

occurs indefinitely.

Time Dial - This setting determines the inverse time curve selected.

UNDEREXCITATION LIMITING Adjustments based on generator ratings.

STATOR CURRENT LIMITING

High Level - High current level set point adjustable from 0 to 60,000Aac in 0.1Aac increments.

Limiting occurs for a time period ranging from 0 to 60 seconds, settable in 0.1 sec. increments.

Low Level - Low current level set point adjustable from 0 to 60,000Aac in 0.1Aac increments.

Limiting occurs indefinitely.

SEQUENCE OF EVENT RECORDING (SER) 127 event reports stored in volatile memory (retrievable via

BESTCOMS). SER triggered by: Input/Output status changes, system operating status changes, and alarm annunciations.

OSCILLOGRAPHY Stores 8 records. Up to 6 variables can be logged in a record. Sampling rate: 600 data points

per log, pre-trigger adjustable from 0 to 599 data points, 4ms to 10sec intervals between data points (2.4sec to

6000sec. total log duration)

MANUAL EXCITATION CONTROL Regulates field current from 0 to 15.0A in increments of 0.1Adc.

VOLTAGE MATCHING Matches utility bus RMS voltage with generator output RMS voltage within ±0.15% of

the generator voltage

REAL TIME CLOCK Time displayed in either 12 hour or 24 hour format and can be selected to allow for daylight

savings timer. The date is selectable for two formats: d-m-y or m/d/y. Requires control power to operate. If power is

lost, the clock will need to be reset.