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5-9

Table 5-3. Troubleshooting Chart - Continued.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

4. VOLTAGE HIGH AND CONTROLLABLE WITH VOLTAGE ADJUST RHEOSTAT - Continued.

Step 3. Check that the Voltage Adjust Potentiometer (R1) resistance is not too low.

If the Voltage Adjust Potentiometer resistance is too low, replace potentiometer with one
of the proper value.

If the Voltage Adjust Potentiometer resistance is proper, proceed to step 4.

Step 4. Verify that the sensing leads are properly connected to the generator and regulator.

If the sensing leads are improperly connected, reconnect properly.

If the sensing leads are properly connected, proceed to step 5.

Step 5. Verify that three-phase sensing is applied to regulator.  (Three-phase sensing models

only.  For single-phase sensing models, proceed to step 6.)

If single-phase sensing is applied, reconnect for three-phase sensing.

If three phase sensing is applied, proceed to step 6.

Step 6. Verify the accuracy and connection of the voltmeter.

If voltmeter is improperly connected, reconnect voltmeter properly.

If voltmeter is defective, replace voltmeter.

If voltmeter is connected properly and not defective, proceed to step 7.

Step 7. If the above steps fail to correct the malfunction, replace or repair the voltage regulator

as necessary.

5. VOLTAGE LOW AND CONTROLLABLE WITH VOLTAGE ADJUST RHEOSTAT.

Step 1.  Check that the sensing transformer is set to the proper tap.

If transformer tap is improperly selected, reconnect to proper tap.

If transformer tap is properly selected, proceed to step 2.

Step 2. Check that Voltage Range Adjust Potentiometer (R3) is not set too low.

If Voltage Range Adjust Potentiometer is set too low, adjust potentiometer.

If Voltage Range Adjust Potentiometer setting is within limits, proceed to step 3.

Содержание SR4A

Страница 1: ...INSTRUCTION MANUAL FOR VOLTAGE REGULATOR Model SR4A SR8A Part Number 9 0177 00 XXX Publication Number 9 0177 00 990 Revision R 09 97...

Страница 2: ...ided Specifications Functional Description Installation Information Operation Maintenance REV L M N P R ECA 15609 15959 16057 16195 16334 WARNING TO AVOID PERSONAL INJURY OR EQUIPMENT DAMAGE ONLY QUAL...

Страница 3: ...and design of all features and options are subject to modification without notice Should further information be required contact Basler Electric Company Highland Illinois BASLER ELECTRIC BOX 269 HIGHL...

Страница 4: ...P N 03469 3 2 Brush Type Rotary Exciter Interconnection 3 5 Brushless Type Rotary Exciter or Static Exciter Interconnection 3 6 3 3 Parallel Compensation 3 6 3 4 Reactive Droop Compensation Droop 3 7...

Страница 5: ...Continued SECTION 5 MAINTENANCE REPLACEMENT PARTS AND TROUBLESHOOTING Continued SR8A Replacement Parts 5 3 Wiring Diagram 5 4 5 4 Warranty and Repair Service 5 5 5 5 Troubleshooting 5 5 Troubleshootin...

Страница 6: ...n and shock Table 1 1 provides the electrical specifications of the SR4A and SR8A while Table 1 2 provides the physical specifications Table 1 1 Electrical Specifications Input Power SR4A SR8A 95 139...

Страница 7: ...mounted directly to an engine generator set It is strongly recommended that the voltage regulator be mounted vertically for optimum cooling Overall Dimensions Height Width Depth 11 5 inches 292 mm 8...

Страница 8: ...formation covering these accessories may be obtained by consulting the applicable instruction manual and product bulletin or by contacting your nearest Basler Electric Sales Representative or the fact...

Страница 9: ...tage Adjust Rheostat supplied separately with regulator A For use on all brush type and most brushless exciters on generators rated over 150 kW E For use with brushless exciters primarily on generator...

Страница 10: ...cally sealed relay 15 Selectable 1 phase sensing 16 Selectable 3 phase sensing w Faston connectors B Cover 2 Voltage adjust rheostat internally installed 3 Voltage adjust rheostat supplied separately...

Страница 11: ...he field power is taken from the generator output voltage A heavy load such as a large motor can cause the generator voltage to decrease substantially at the first few cycles after load applications A...

Страница 12: ...ard The ac voltage applied to the sensing rectifier bridge is the vector sum of the stepped down sensing voltage terminals E1 and E3 and the parallel CT signal supplied through T3 terminals 1 and 2 Th...

Страница 13: ...ss current 1 Reactive differential compensation allows two or more paralleled generators to share inductive reactive loads with no decrease or droop in the generator system output voltage This is acco...

Страница 14: ...ounted in any location where the ambient temperature does not exceed its ambient operational limits Due to its rugged construction the regulator can be mounted directly on the generator The overall an...

Страница 15: ...eter P N 03456 Figure 3 3 Paralleling Potentiometer P N 03469 3 2 INTERCONNECTION CAUTION Meggers and high potential test equipment must not be used Incorrect use of such equipment could damage the se...

Страница 16: ...drop in leads that may occur at points other than where the regulator sensing leads are connected The leads that supply regulator sensing should not be used to supply power to any other equipment or t...

Страница 17: ...into the system The voltage regulator could be damaged if interconnection is attempted before this data is known 2 When manual voltage control is desired on brush type exciter applications a MANUAL OF...

Страница 18: ...able 1 2 a power transformer must be used to match the generator voltage to the regulator input If excessive voltage is applied to the regulator input terminals 3 and 4 the regulator may be damaged CA...

Страница 19: ...lator provisions a 25 VA current transformer CT is required See Figure 3 4 and 3 5 This CT is connected in a generator line and should deliver from 3 to 5 A secondary current at rated load b The phase...

Страница 20: ...voltage droop will be introduced into the system This is due to the unloaded generator parallel CT not supplying its compensating signal but allowing a voltage drop to occur across it Lack of this sho...

Страница 21: ...3 8 LJXUH 5HDFWLYH LIIHUHQWLDO URVV FXUUHQW RPSHQVDWLRQ 7 QWHUFRQQHFWLRQ...

Страница 22: ...3 9 Figure 3 7 Top View of Voltage Regulator...

Страница 23: ...d at reduced speed See Figure 3 3 If this switch is not used it is recommended it be temporarily installed for initial operation b If the A terminal is used a double pole switch must be used for volta...

Страница 24: ...s obtained Maximum generator voltage is obtained with minimum resistance CW c Nominal Voltage Range Set Adjust R3 This adjustment is provided to vary the limits of R1 Normally R3 is set to provide R1...

Страница 25: ...these steps see paragraph 3 2c 3 Tighten lock nut on R4 d To adjust the voltage range for 10 verify R1 is adjusted to the center of its travel and perform the following steps 1 Loosen the locking nut...

Страница 26: ...AR load 2 The speed governing system must make the generators share the total kW load a Preliminary Instructions 1 It is recommended before proceeding that the operation of the components in and exter...

Страница 27: ...be attempted only when the speeds frequencies are equal and at the instant when the generator voltages are equal That is they have the same phase sequence of voltage and the voltages are in phase d Me...

Страница 28: ...ed when both sets are supplying the same percent of rated current the kW or power factor readings are equal or the sum of the ammeter currents of the two sets is minimum 3 Upon closing the circuit bre...

Страница 29: ...7 NOTE Sometimes a stability problem or fighting of these two high gain control systems governor and voltage regulator causes paralleling problems that cannot be isolated using manual voltage control...

Страница 30: ...efer to Figure 5 1 a Move the wire on the sensing transformer T1 to the terminal listed below SR4A Move to 120 V tap SR8A Move to 240 V tap b Adjust the voltage stability potentiometer R4 fully counte...

Страница 31: ...al a stability problem however rotating the stability adjustment R4 should affect the light s turn on turn off time i Before reinstalling the voltage regulator into the system reconnect the sensing tr...

Страница 32: ...7 R1 R1 R1 03456 02629 04768 Rheostat Ext 175 10 25 W Rheostat Ext 150 10 5 W Rheostat Ext 150 10 4 W Table 5 2 SR8A Replacement Parts Figure 5 1 Legend No Reference Designation Basler Part Number Des...

Страница 33: ...5 4 Figure 5 3 Wiring Diagram...

Страница 34: ...d troubles Pre arrangement with either the nearest Basler Sales Office or the Factory will assure the fastest possible turn around time b Out of warranty units should also be returned freight prepaid...

Страница 35: ...rated speed proceed to step 4 Step 4 Incorrect or missing voltage at regulator power input terminals 3 4 If this condition exists repair wiring If this condition does not exist proceed to step 5 Step...

Страница 36: ...nal voltage Step 11 If the above steps fail to correct the malfunction replace or repair the voltage regula tor 2 VOLTAGE BUILDS UP UNTIL RELAY ACTUATES THEN DECAYS Step 1 Check for a defective Voltag...

Страница 37: ...orted proceed to step 4 Step 4 Verify that the sensing transformer is set to the proper tap If transformer tap is improperly selected reconnect to proper tap If transformer tap is properly selected pr...

Страница 38: ...s proceed to step 6 If single phase sensing is applied reconnect for three phase sensing If three phase sensing is applied proceed to step 6 Step 6 Verify the accuracy and connection of the voltmeter...

Страница 39: ...ter is defective replace voltmeter If voltmeter is connected properly and not defective proceed to step 6 Step 6 If the above steps fail to correct the malfunction replace or repair the voltage regula...

Страница 40: ...ve replace switch If the switch is set to the proper position proceed to step 6 Step 6 Check that load is not unbalanced as regulator averages all three phases together Three Phase Sensing ONLY All ot...

Страница 41: ...setting If R4 is not maladjusted proceed to step 5 Step 5 Verify that the no load field voltage is at rated If the no load field voltage is below rated refer to paragraph 3 2c If the no load field vo...

Страница 42: ...NED FOR PARALLEL GENERA TORS Step 1 Verify that the tap on R25 is not set to the minimum position If the tap is set to the minimum position adjust R25 to obtain the required droop If the tap is set pr...

Страница 43: ...uired 3 to 5 A secondary current proceed to step 3 Step 3 Verify that the paralleling CT s polarity is correct If the CT s polarity is incorrect reverse the CT secondary leads If the CT s polarity is...

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