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Basler SR6A Instruction Manual

Voltage regulator
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INSTRUCTION MANUAL
CALL US TODAY
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1-888-POWER-58
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FOR
SR6A & SR9A
Voltage Regulator
Part Number: 9017700XXX
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parts@genpowerusa.com
parts@genpowerusa.com
Publication: 9017700991
Revision: J
Jul-13
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www.genpowerusa.com
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  • Page 1 INSTRUCTION MANUAL SR6A & SR9A Voltage Regulator Part Number: 9017700XXX Publication: 9017700991 Revision: J Jul-13 CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...
  • Page 2 CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...
  • Page 3 Preface This instruction manual provides information about the installation and operation of the SR6A & SR9A Voltage Regulator. To accomplish this, the following information is provided: • General information • Mounting • Operation • Troubleshooting Conventions Used in this Manual Important safety and procedural information is emphasized and presented in this manual through warning, caution, and note boxes.
  • Page 4 The availability and design of all features and options are subject to modification without notice. Over time, improvements and revisions may be made to this publication. Before performing any of the following procedures, contact Basler Electric for the latest revision of this manual.
  • Page 5 Revision History The following information provides a historical summary of the changes made to this instruction manual (9017700991 Rev J). Revisions are listed in chronological order. Manual Revision and Date Change J, Jul-13 • Converted manual into new style and structure •...
  • Page 6 CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...

  • Page 7: Table Of Contents

    Contents General Information ............................ 1 Specifications ............................1 Power Input* ............................1 Output Rating ............................1 Input Sensing Voltage* (NEMA Standard) .................... 1 Field Resistance ............................ 1 Temperature ............................2 Vibration ..............................2 Mounting ..............................2 Weight ..............................2 Overall Dimensions ..........................2 Optional Features ............................
  • Page 8 Troubleshooting ............................27 Voltage Does Not Build Up to Rated Value ..................... 27 Voltage Builds Up Until Relay Actuates, Then Decays ................28 Voltage High but Uncontrollable with Voltage Adjust Rheostat............... 28 Voltage High but Controllable with Voltage Adjust Rheostat ..............28 Voltage Low and Controllable with Voltage Adjust Rheostat ..............

  • Page 9: General Information

    General Information The SR6A and SR9A Voltage Regulators precisely control the output voltage of an ac electric generating system by controlling the amount of current supplied to the exciter (or generator) field. This includes brushless rotary exciters, brush type rotary exciters, or direct excitation into the field of machines within the regulator’s power rating.

  • Page 10: Temperature

    • Voltage adjust rheostat • Type of stability circuit Accessories The following is a partial list of accessories that are available for use with the SR6A and SR9A Voltage Regulators. • EMI suppression filters • Low- and medium-voltage power isolation transformers •...

  • Page 11: Model And Style Number Description

    If used, an external voltage adjust rheostat may be obtained from a source other than Basler Electric. This rheostat must be a minimum of 2 watts in size. The nominal required resistance is 175 Ω. Although any value from 150 Ω to 250 Ω may be used, a slight change in the voltage adjust range will occur.
  • Page 12 CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...

  • Page 13: Principles Of Operation

    Principles of Operation Functional Circuits Refer to the block diagram in Figure 2. The voltage regulator senses the generator voltage, compares a rectified sample of that voltage with a reference diode (Zener) voltage, and supplies the field current required to maintain the predetermined ratio between the generator voltage and the reference voltage. This unit consists of five basic circuits.

  • Page 14: Parallel Compensation

    Parallel Compensation Parallel operation requires additional components in the regulating system. These are resistor R25, transformer T3 and a current transformer CT1. Two of the components are included in a parallel equipped voltage regulator. These are R25 and T3. Current transformer (CT1) is a separate item and must be interconnected as shown in the Installation chapter.
  • Page 15 Contact Basler Electric for additional information. CALL US TODAY...
  • Page 16 CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...

  • Page 17: Installation

    Installation Mounting The voltage regulator should be mounted vertically for optimum cooling when operating near its full-rated output. The regulator can be mounted in any location where the ambient temperature does not exceed its operational limits. Due to its rugged construction, the regulator can be mounted directly on the generator. Outline dimensions are shown in Figure 3.
  • Page 18 The outline drawing for the voltage adjust rheostat (Basler P/N: 03456) is shown in Figure 4. Figure 4. Outline Drawing - Voltage Adjust Rheostat (Basler P/N: 03456) CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE...

  • Page 19: Interconnection

    The outline drawing for the paralleling rheostat (Basler P/N: 03469) is shown in Figure 5. Figure 5. Outline Drawing - Paralleling Rheostat (Basler P/N: 03469) Interconnection Caution Meggers and high potential test equipment must not be used. Incorrect use of such equipment could damage the semiconductors contained in the regulator.
  • Page 20 SR6A and SR9A Voltage Regulators are factory preset for 120 Vac sensing voltage. If the sensing voltage needs to be changed for your application, perform the following steps.

  • Page 21: Field Power (Terminals F+ And F-)

    Example An SR6A voltage regulator is required to operate into an exciter field that has a dc resistance of 4 Ω and a current requirement of 2.5 Adc at no load and 6 Adc at full load. Since the SR6A requires a minimum field resistance of 9 Ω, a resistor of at least 5 Ω...

  • Page 22: Parallel Compensation (Terminals 1 And 2)

    Reactive differential compensation cannot be used when paralleled with the utility or any infinite bus. If this compensation system is used, a switching circuit must be used to convert the system to a reactive droop compensation system. Contact Basler Electric for additional information. CALL US TODAY...
  • Page 23 Figure 7. Interconnection - Brush Type Rotary Exciter CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...
  • Page 24 Figure 8. Interconnection Brushless Rotary Exciter (or Static Exciter) CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...
  • Page 25 Notes: 1) When more than 3 generators are to be paralleled, continue connections as shown. 2) Paralleling CT polarities are shown A-B-C phase rotation. Figure 9. Reactive Differential (Cross-Current) Compensation CT’s Interconnection CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE...

  • Page 26: Wiring

    Wiring An internal wiring diagram is shown in Figure 10. Figure 10. Internal Wiring Diagram CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...

  • Page 27: Operation

    Operation Initial operating procedures are outlined in Initial Operation and Field Flashing and should be reviewed before operation is attempted. Caution All SR6A & SR9A voltage regulators are shipped preset for 120 Vac sensing. Operation at Reduced Speeds Caution Do not operate the generating system at reduced speeds for an extended period of time with the voltage regulator in operation.

  • Page 28: Stability Adjustment R4

    Stability Adjustment R4 This adjustment enables stable regulating operation. It controls the amount of feedback that is applied to the error amplifier stage. Normally it is factory-set in the 75% rotation clockwise (CW) position. This setting normally assures good stability, but tends to slow the response time of the generator. If rotated counterclockwise (CCW), the generator response time becomes faster.

  • Page 29: Instability

    2. Rotate R4 clockwise (CW) approximately 30° beyond the point that stable operation is obtained. If stability cannot be obtained by performing these steps, see Field Power Interconnection in the Installation chapter. 3. Tighten the lock nut on R4. d. To adjust the voltage range for ±10%, verify that R1 is adjusted to the center of its travel and perform the following steps: 1.

  • Page 30: Parallel Operation

    Parallel Operation The following paragraphs describe the procedures to be followed to operate two or more generator sets in parallel. In order to insure proper parallel operation, the following requirements must be met: 1) The voltage regulating systems must cause the generators to share the total kvar load. 2) The speed governing system must make the generators share the total kW load.

  • Page 31: Sequence Of Operation (Parallel)

    Sequence of Operation (Parallel) The following instructions describe the procedures to be followed for paralleling generators on an isolated bus. These procedures should be completely reviewed and understood before paralleling is attempted. a. Start generator set #1. b. Close the circuit breaker to connect the generator to the bus. c.
  • Page 32 Note Sometimes a stability problem or battle of these two high-gain control systems (governor and voltage regulator) causes paralleling problems that cannot be isolated using manual control. CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58...

  • Page 33: Maintenance

    Basler SR6A and SR9A are warranted against defective material and workmanship for 18 months from the date of shipment from Basler Electric. Units submitted for warranty repair should be returned to Basler Electric, freight prepaid, with complete description of the installation and the reported troubles. Pre- arrangement with Basler Electric will assure the fastest possible turnaround time.
  • Page 34 CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...

  • Page 35: Troubleshooting

    Troubleshooting This chapter describes the more common generator system malfunctions and the appropriate repair procedure. Voltage Does Not Build Up to Rated Value Step 1. Check for low residual voltage and/or incorrect polarity relationship between the exciter output and the generator field. If either condition exists, flash the generator field.

  • Page 36: Voltage Builds Up Until Relay Actuates, Then Decays

    Voltage Builds Up Until Relay Actuates, Then Decays Step 1. Check for a defective Voltage Adjust Rheostat (R1) and/or defective associated circuitry. If the circuitry is defective, repair the circuit/wiring. If the rheostat is defective, replace the rheostat. If neither the rheostat or the circuit is defective, proceed to Step 2. Step 2.

  • Page 37: Voltage Low And Controllable With Voltage Adjust Rheostat

    Poor Regulation Step 1. Verify that the exciter/generator field requirements are not in excess of the voltage regulator capability. If the regulator application is incorrect for the regulator, contact Basler Electric. CALL US TODAY CALL US TODAY REQUEST A QUOTE...

  • Page 38: Poor Voltage Stability

    If the regulator application is within regulator limits, proceed to Step 2. Step 2. Verify that the input voltage (terminals 3 and 4) is of the correct value. If the input voltage is incorrect, apply the correct voltage to terminals 3 and 4. If the input voltage is correct, proceed to Step 3.

  • Page 39: Voltage Recovers Slowly With Load Change

    Voltage Recovers Slowly with Load Change Step 1. Verify that the correct regulator is being used for the application. If the incorrect regulator is being used, contact Basler Electric. If the correct regulator is being used, proceed to Step 2. Step 2.

  • Page 40: Parallel Generators Do Not Divide Reactive Kvar Load Equally (Circulating Reactive Current Between Generators)

    Step 3. Verify that terminals 1 and 2 of the regulator are not shorted by the Unit/Parallel switch. If the switch is set to Unit, set it to Parallel. If the terminals are shorted, replace the switch and/or repair the wiring. If the terminals are not shorted, proceed to Step 4.
  • Page 41 CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...
  • Page 42 CALL US TODAY CALL US TODAY REQUEST A QUOTE REQUEST A QUOTE SHOP ONLINE SHOP ONLINE 1-888-POWER-58 1-888-POWER-58 parts@genpowerusa.com parts@genpowerusa.com www.genpowerusa.com www.genpowerusa.com...

This manual is also suitable for:

Sr9a

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