DYNA II Digital Isochronous Load Sharing - ssdservice.pl

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7.0 CALIBRATION INSTRUCTIONS FOR DIGITAL ILS 7.1 INSTALLATION CHECKOUT Following completion of system wiring and before starting the engine/generator, perform the checkout procedure to assist in verifying that the ILS unit is operational. These checks provide an indication of the unit’s operating capability. 7.1.1 Remove the ILS module cover. 7.1.2 Visual inspection. RPM for generating the desired generator output frequency. c. Calibrate the DYNA controller per the calibration and adjustment sheet for the controller. d. Once engine/generator is running stable, proceed to step 7.1.7, ILS voltage and current phasing check. 7.1.7 ILS voltage and current phasing check. a. Check all wiring for loose connections or broken wires. b. Check wiring to verify it agrees with the system wiring diagram. c. Repair or correct wiring before starting engine/ generator. 7.1.3 ILS initial potentiometer settings. a. Set “LS Gain” potentiometer fully clockwise. b. Set “Droop” potentiometer fully counterclockwise.* c. Set forward power on, “FP On”, potentiometer fully CW. d. Set forward power off, “FP Off”, potentiometer fully CW. e. Set reverse power, “RPLVL”, potentiometer fully CW. f. Set “Load Pulse” potentiometer fully CCW. NOTE “Balance” potentiometer is factory set. * If the unit must be set up against an infinite bus, then set “Droop” potentiometer at mid-range for a starting point. 7.1.4 If “Remote Speed” potentiometer is used, set it to mid-range. (The Barber-Colman potentiometer is a 10-turn unit.) 7.1.5 Check the DYNA controller and, if necessary, set potentiometer as called out on the calibration and adjustments sheet for the DYNA I controller. CAUTION Current transformers must be connected to burden resistors. Do not operate engine/generator when any leads are removed from terminals 4, 5, 6, 7, 8 or 9 of the ILS module. Current transformers can develop dangerously high voltages when they are operated into an open circuit. 7.1.6 Start the engine. a. If the actuator does not allow the fuel system to open far enough to allow engine to start, the “Speed” potentiometer will have to be adjusted clockwise to increase the speed setting. Uncontrolled Document a. Start engine/generator and load unit to as near full load as possible with a unity power factor load. Keep load constant and balanced. b. Connect DC voltmeter to TP1 and TP2 test jacks. See Figure 2 in the Installation section. The red jack is plus and the black jack is minus. The positive lead of the voltmeter goes into the red jack. Adjust the C.T. CAL potentiometer to achieve 7.5 Vdc at the test points. Clockwise increases test point voltage; counterclockwise decreases test point voltage. CAUTION Current transformers must be connected to burden resistors. Do not operate engine/generator when any leads are removed from terminals 4, 5, 6, 7, 8 or 9 of the ILS module. Current transformers can develop dangerously high voltages when they are operated into an open circuit. c. Check for correct phasing of the voltage and current inputs to the ILS module by placing a jumper between test points TPA and TPN (phase A). The voltage at test jacks TP1 and TP2 should drop by approximately 1/3. Remove jumper from between test points TPA and TPN. Repeat procedure for test points TPB and TPN (phase B) and test points TPC and TPN (phase C). Each time the voltage should drop by 1/3. If the above conditions are not obtained, proceed with the next step to establish the correct phase relationship for the potential and current transformer connections. If the phase wiring is correct, proceed to step 7.1 .8. For Historical Reference Only b. Adjust the DYNA controller’s internal “Speed” potentiometer until the engine/generator is operating at the correct 12 NOTE Improper wiring of the three-phase current and voltage inputs causes most parallel load sharing difficulties. The voltage of one phase is often wired with the current signal of another phase or transformers are wired in backwards so that the two signals oppose rather than add to each other. d. Stop the engine. Recheck the wiring. Make certain all CTs are phased identically and that the voltage at terminal 1 comes from the same phase as the CT connected to terminals 4 and 5. Terminal 2’s voltage connection should be from the same phase as the CT connected to terminals 6 and 7, and terminal 3’s voltage should be from the same phase as the CT connected to terminals 8 and 9. Correct
any mistakes and repeat steps A through C, recording the voltage at the test points for each step. e. Stop the engine. If the test point voltage is negative, but still drops by 1/3 when the jumper is applied to each CT connection, then all CTs are phased backwards. Terminals 4 & 5, 6 & 7 and 8 & 9 should be swapped. If the jumper causes any test point voltage to increase, then it is likely that phase is backwards. f. To determine if all CTs are functioning, the voltage across the ILS’s burden resistors can be read. This voltage should be .05 ohms x secondary current. Check that the CT scaling is correct for your generator. g. When proper power measurement is achieved, proceed to step 7.1.8. 7.1.8 CT Cal adjustment. a. Start the engine and load the generator to 100% load. Then adjust the I LS module “CT Cal” potentiometer for 7.5 Vdc at TP1 and TP2. The following table can be used for setting TP1 and TP2 if 100% load cannot be obtained. % Load TP1 to TP2 DC Voltage 80 6.00 50 3.50 20 1.50 b. Do not adjust the CT Cal potentiometer again. It may be desirable to apply an adhesive such as RTV to make further adjustment more difficult. 7.1.9 LS Gain adjustment. a. Next, with the same load applied, turn the “LS Gain” potentiometer CCW until the test point voltage drops to 8/10 of its previous value. b. At unity power factor measure the governor KW output or calculate it based on voltage and current readings. 7.1.10 PM Gain adjustment. Uncontrolled Document b. The power monitor output has a range of 0-5 volts DC or 0-5 mA for 100% load and the test points at 7.5 volts. Adjust the “PM Gain” potentiometer to provide the correct KW reading on your meter. Lock the “PM Gain” potentiometer with adhesive. c. Now continue with the other adjustments as necessary in steps 7.1.11, 7.1.12, 7.1.13 and 7.1.14. 7.1.11 ILS “Droop” potentiometer adjustment. a. Turning the “Droop” potentiometer clockwise increases the percentage of droop. The “Droop” potentiometer sets the amount of speed regulation for the prime mover. The “Droop” potentiometer biases the wheatstone bridge in a direction to cause the speed to decrease with an increase in load. Percent of droop is the difference in engine speed at no load with respect to engine speed at full load expressed as a percentage. The ratio of full load capacity to actual load must be taken into consideration when the load does not have a unit power factor. To set droop, proceed with the following steps. b. Set Droop/Isochronous switch to droop position. If switch is not used, make sure ILS terminal 11 is connected to terminal 12. c. Set ILS “LS Gain” potentiometer to obtain 6V at TP1 and TP2 at full load. This voltage TP1 and TP2 must be set to the same value on all engines in the same system. NOTE If stability problems are evident during paralleling, reduce the voltage at the TP1 and TP2 by turning the LS Gain CCW. This reduction must be done on all ILS modules. All test point voltages must be equal at full load. d. Set “Droop” potentiometer to provide desired percentage of droop. e. Operate engine/generator at correct frequency of 50 or 60 Hz no load and record Hz reading. This is frequency F1. f. Load engine/generator to full load and record Hz reading. This is frequency F2. For Historical Reference Only a. The ILS current transformer burden resistors are .05 ohms. Phase currents can be determined by measuring the voltage across the burden resistors, calculating the current transformer current, Vburden = CT current .05 and scaling upward by the current transformer step down ratio. g. Calculate droop as shown below: % Droop = F1 - F2 x 100 F2 h. The above procedure may have to be repeated several times to obtain the desired percentage of droop. 7.1.12 ILS “Load Pulse” potentiometer adjustment. KW can be calculated with the following equation: KW = 1.732 VLL (IA + IB + IC ) 3000 NOTE If “Load Pulse” function is not being used, the “Load Pulse” potentiometer must be set fully counterclockwise. a. load pulse sensor provides a pulse output to the amplifier when a step change in load on the generator occurs. 13
Page 1 and 2: Technical Manual DYNA II Digital Is
Page 3 and 4: 2.0 PARALLEL OPERATION USING DIGITA
Page 5 and 6: 4.0 ADJUSTMENTS Current Transformer
Page 7 and 8: TPB TPA RPLVL FP TPC OFF FP ON LOAD
Page 9 and 10: Figure 4. Typical Electrical Schema
Page 11: NOTE See Bulletin 16V for proper wi
Page 15 and 16: 8.0 TROUBLESHOOTING FOR DYNA II DIG

DYNA II Digital Isochronous Load Sharing - ssdservice.pl

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