Basler Electric DECS-400 - Manual (Page 159)

9369700990 Rev R 147
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Using BESTCOMS, set the SCL high limit to 50% greater than the metered current. .......... ________
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Using BESTCOMS set the SCL high limit time delay at 5 seconds. ..................................... ________
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Enable stator current limiting. ................................................................................................ ________
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Perform a step response into the SCL limit. .......................................................................... ________
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Verify stable performance and speed of response. .............................................................. ________
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Repeat with unit supplying 30% load at 0.8 leading PF in Droop mode. .............................. ________
If the response time is too slow, increase the SCL gain (Ki and Kg) and repeat the test.
•
Verify stable performance of the SCL by testing the machine from 25% through 100%
real-power loading, underexcited. ......................................................................................... ________
•
Increase the excitation above the UEL limit. ......................................................................... ________
•
Enter the final, operating UEL values. ................................................................................... ________
Var Test (If Applicable)
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Verify that Var mode is nulled to AVR. .................................................................................. ________
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Verify that all null status indicators indicate a null condition. ................................................ ________
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Verify that the Var pre-position mode is disabled or the external pre-position contacts
are open. ................................................................................................................................ ________
In the following step, be prepared to transfer back to AVR mode if the excitation voltage increases
suddenly.
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Transfer to Var. ...................................................................................................................... ________
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Set kW for 25% output. .......................................................................................................... ________
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Adjust vars to 30% of rated. .................................................................................................. ________
Monitor the field voltage to determine performance of the following step.
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Using BESTCOMS, perform a 5% step response stability test. ............................................ ________
•
If necessary, increase the var gain (Ki and Kg) to quicken the response and repeat the
test. ........................................................................................................................................ ________
Power Factor Test (If Applicable)
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Verify that PF mode is nulled to Var mode. ........................................................................... ________
•
Verify that all null status indicators indicate a null condition. ................................................ ________
•
Verify that the PF pre-position mode is disabled or the external pre-position contacts
are open. ................................................................................................................................ ________
In the following step, be prepared to transfer back to PF mode if the excitation voltage increases
suddenly.
•
Transfer to PF. ....................................................................................................................... ________
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Adjust the power factor for 0.9 lagging. ................................................................................. ________
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Perform a step response by changing the PF setpoint to 0.85 lagging to determine
stability. .................................................................................................................................. ________
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If necessary, increase the PF gain (Ki and Kg) to quicken the response and repeat the
test. ........................................................................................................................................ ________
Recommended PSS Testing
The following paragraphs describe desired tests to evaluate and confirm stabilizer operation in your
system. For specific testing and commissioning procedures, contact Basler Electric Technical Sales
Support at +1 618-654-2341.
DECS-400 Commissioning