Basler DECS-200 User Manual

6-18 Setup DECS-200
If an output relay is programmed to alarm, the output, BESTCOMS, front panel HMI, and
any remote indicator should annunciate the alarm. ...................................................................... ________
Reset the AVR setpoint to the rated output .................................................................................. ________
Limit and Protection Check
In this test, operation of generator overvoltage protection, generator undervoltage protection, field
overvoltage protection, and field overcurrent protection will be verified.
Review the overvoltage protection settings in BESTCOMS ......................................................... ________
Reduce the Generator Overvoltage Level setting to the alarm threshold..................................... ________
Verify that all alarms and annunciation function as programmed................................................. ________
Reset the generator Overvoltage Level setting to the desired value............................................ ________
Raise the Generator Undervoltage Level setting to the alarm threshold...................................... ________
Verify that all alarms and annunciations function as programmed ............................................... ________
Reset the Generator Undervoltage Level setting to the desired value ......................................... ________
Reduce the Exciter Field Overvoltage Level setting to the alarm threshold ................................. ________
Verify that all alarms and annunciations function as programmed ............................................... ________
Reduce the Exciter Field Overvoltage Level setting to the desired value .................................... ________
Reduce the Exciter Field Overcurrent Level setting to the alarm threshold ................................. ________
Verify all alarms and annunciations function as programmed ...................................................... ________
Reset the Exciter Field Overcurrent Level setting to the desired value........................................ ________
Parallel Operation, Generator On Line
In this test, the generator is connected to the bus and the phase relationship between the current and
sensed voltage is checked. If the polarity of the CT is incorrect, a shorting terminal block can be used to
reverse the CT polarity. If sensed voltage has the wrong phasing, the generator breaker must be opened,
and the wiring corrected. In the following procedures, overexcitation and underexcitation protection is
exercised, and var and power factor performance evaluations are conducted at levels that will not stress
the machine. For more information about paralleling circuits, download Application Note 126 from the
Basler Electric website at www.basler.com
.
Phase Relationship Test
Transfer to FCR mode .................................................................................................................. ________
Parallel the generator with the bus ............................................................................................... ________
Set the machine kilowatt level at approximately 25% of the machine rating at 0 vars ................. ________
Check for phase shift at the voltage and current sensing inputs of the DECS-200.
The B-phase current should lag the sensed voltage (between E1 and E3) by 90°. If the
phase relationship is correct, proceed with testing. If the phase relationship is incorrect,
troubleshoot the system, resolve the problem, and retest as appropriate before transferring
to AVR mode................................................................................................................................. ________
Verify that the AVR setpoint is nulled to the FCR setpoint ........................................................... ________
Verify that all null status indicators provide the null indication...................................................... ________
Verify that AVR Pre-position mode is disabled or that the external pre-position contacts
are open. ....................................................................................................................................... ________
In the following step, be prepared to transfer back to Manual mode if the excitation voltage increases
suddenly.
Transfer to AVR ............................................................................................................................ ________

Basler DECS-200 Specifications

General

Brand	Basler
Model	DECS-200
Category	Controller
Language	English