1、 MIL-HDBK-704-3 9 April 2004 DEPARTMENT OF DEFENSE HANDBOOK GUIDANCE FOR TEST PROCEDURES FOR DEMONSTRATION OF UTILIZATION EQUIPMENT COMPLIANCE TO AIRCRAFT ELECTRICAL POWER CHARACTERISTICS THREE PHASE, 400 Hz, 115 VOLT ( PART 3 OF 8 PARTS ) This Handbook is for guidance only. Do not cite this documen
2、t as a requirement. AMSC N/A AREA SESS NOT MEASUREMENT SENSITIVE Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-3 iiFOREWORD 1. This handbook is approved for use by all Departments and Agencies of the Department of Defense. 2. This hand
3、book provides guidance on test procedures for demonstration of three phase, 400 Hz, 115 volt utilization equipment to determine compliance with the applicable edition of MIL-STD-704. 3. MIL-HDBK-704-3 is Part 3 in a series of 8 Parts. Part 3 describes the test methods and procedures to demonstrate t
4、hat three phase, 400 Hz, 115 volt utilization equipment is compatible with the electric power characteristics of MIL-STD-704. These series of handbooks and MIL-STD-704 are companion documents. 4. Comments, suggestions, or questions on this document should be addressed to Commander, Naval Air Systems
5、 Command, 4.1.4, Highway 547, Lakehurst, NJ 08733-5100 or email to thomas.omaranavy.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/www.dodssp.daps.mil/. Provided by IHSNot for ResaleNo reproduction
6、or networking permitted without license from IHS-,-,-MIL-HDBK-704-3 iiiCONTENTS PARAGRAPH PAGE FOREWORD ii 1. SCOPE 1 1.1 Scope. 1 2. APPLICABLE DOCUMENTS 1 2.1 General 1 2.2 Government documents 1 2.2.1 Specifications, standards and handbooks 1 3. DEFINITIONS 1 3.1 Acronyms and definitions. 1 4. TE
7、ST METHODS INFORMATION . 1 4.1 Demonstration of compatibility 1 4.1.1 Recording performance. 1 4.2 Calibration of test equpment. 1 4.3 Test methods. 2 5. TEST METHODS. 4 METHOD TAC101 Load Measurements 5 METHOD TAC102 Steady State Limits for Voltage, Including . Unbalance, and Frequency. 10 METHOD T
8、AC103 Voltage Phase Difference . 16 METHOD TAC104 Voltage Modulation 20 METHOD TAC105 Frequency Modulation 26 METHOD TAC106 Voltage Distortion Spectrum 33 METHOD TAC107 Total Voltage Distortion. 39 METHOD TAC108 DC Voltage Component . 44 METHOD TAC109 Normal Voltage Transients. 48 METHOD TAC110 Norm
9、al Frequency Transients. 61 METHOD TAC201 Power Interrupt . 70 METHOD TAC301 Abnormal Steady State Limits for Voltage and Frequency 77 METHOD TAC302 Abnormal Voltage Transients. 83 METHOD TAC303 Abnormal Frequency Transients. 95 METHOD TAC401 Emergency Steady State Limits for Voltage and Frequency 1
10、01 METHOD TAC501 (No Test Required) . 106 METHOD TAC601 Power Failure (Three Phase) 107 METHOD TAC602 One and Two Phase Power Failures . 111 METHOD TAC603 Phase Reversal (Three Phase). 116 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-
11、3 ivPARAGRAPH PAGE 6. NOTES 121 6.1 Intended use 121 6.2 Subject term (keyword) listing . 121 TABLE TAC-I. Summary of three phase, 400 Hz, 115 volt utilization equipment MIL-STD-704 compliance tests. 3 CONCLUDING MATERIAL 121 Provided by IHSNot for ResaleNo reproduction or networking permitted witho
12、ut license from IHS-,-,-MIL-HDBK-704-3 11. SCOPE 1.1 Scope. This handbook provides, as guidance, test methods used to demonstrate that three phase, 400 Hz, 115 volt utilization equipment is compatible with the electric power characteristics of the applicable edition(s) of MIL-STD-704. This handbook
13、is for guidance only and cannot be cited as a required. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed below are not necessarily all of the documents referenced herein, but are those needed to understand the information provided by this handbook. 2.2 Government documents. 2.2.1 Specificat
14、ions, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-704 DoD Interface Standard for Aircraft Electric Power Characteristics (Copies of these documents are available
15、online at http:/assist. daps.dla.mil/quicksearch or http:/www.dodssp.daps.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 3. DEFINITIONS 3.1 Acronyms and definitions. The acronyms and definitions of MIL-STD-704 are applicable to thi
16、s handbook. 4. TEST METHODS INFORMATION 4.1 Demonstration of compatibility. This section contains the test methods which will ensure that three phase, 400 Hz, 115 volt utilization equipment is compatible with the electric power characteristics of the applicable edition(s) of MIL-STD-704, by testing
17、the Unit Under Test (UUT) in accordance with the test procedures as described in test methods TA101 through TAC603. 4.1.1 Recording performance. In table TAC-I, record the edition(s) of MIL-STD-704 that defined the aircraft electric power characteristics used for testing and the performance of the U
18、UT for each of the test methods. 4.2 Calibration of test equipment. Test equipment and accessories required for measurement in accordance with this handbook should be calibrated in accordance with an approved calibration program traceable to the National Institute for Standards and Technology. Provi
19、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-3 2The serial numbers, model, and calibration date of all test equipment should be included with the test data. 4.3 Test methods. The test methods listed in table TAC-I are provided in section 5
20、 of this handbook. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-3 3TABLE TAC-I. Summary of Three Phase, 400 Hz, 115 volt utilization equipment MIL-STD-704 compliance tests. UUT: Compliance to MIL-STD-704 Edition(s): Test Dates: Test M
21、ethod Description Performance (Pass/Fail) Comments Normal, Aircraft Electrical Operation TAC101 Three Phase Load and Current Harmonic Measurements TAC102 Steady State Limits for Voltage (Including Unbalance) and Frequency TAC103 Voltage Phase Difference TAC104 Voltage Modulation TAC105 Frequency Mod
22、ulation TAC106 Voltage Distortion Spectrum TAC107 Total Voltage Distortion TAC108 DC Voltage Component TAC109 Normal Voltage Transients TAC110 Normal Frequency Transients Transfer, Aircraft Electrical Operation TAC201 Power Interrupt Abnormal, Aircraft Electrical Operation TAC301 Abnormal Limits for
23、 Voltage and Frequency TAC302 Abnormal Voltage Transients (Overvoltage/Undervoltage) TAC303 Abnormal Frequency Transients (Overfrequency/Underfrequency)Emergency, Aircraft Electrical Operation TAC401 Emergency Limits for Voltage and Frequency Starting, Aircraft Electrical Operation TAC501 See Note #
24、1 Power Failure, Aircraft Electrical Operation TAC601 Power Failure (Three Phase) TAC602 One Phase and Two Phase Power Failures TAC603 Phase Reversal Note 1: Starting operation conditions are usually not applicable to AC utilization equipment. No test is required for TAC501 unless specified by the e
25、quipment performance specification.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-3 45. TEST METHODS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-3 5METHOD TAC101 Load Me
26、asurements POWER GROUP: Three Phase, 400 Hz, 115 V AIRCRAFT ELECTRICAL OPERATING CONDITION: Normal PARAMETER: Load Measurements 1. Scope. 1.1 Purpose. This test is used to verify that three phase, 115 Volt, 400 Hz power utilization equipment utilizes only 115 Volt line-to-neutral power, current inru
27、sh is within limits, has balanced power, the power factor is within limits, and does not use half-wave rectification for the applicable edition(s) of MIL-STD-704. Additionally, when the utilization equipment performance specification document imposes current waveform requirements, this test procedur
28、e is used to verify that the utilization equipment current waveform is within total current distortion and current spectrum (current distortion vs. frequency) limits defined in the utilization equipment performance specification document. 2. Validation criteria. The utilization equipment is consider
29、ed to have passed if the utilization equipment utilize only 115 Volt line-to-neutral power, is within current inrush limits, is within the balanced load limits, is within the power factor limits, and does not use half-wave rectification for the applicable edition(s) of MIL-STD-704 and as noted in ta
30、ble TAC101-I. If required by the utilization equipment performance specification document, the utilization equipment current waveform must be within the total current distortion and current spectrum limits defined in the utilization equipment performance specification document. The utilization equip
31、ment must not suffer damage or cause an unsafe condition. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-3 6TABLE TAC101-I. MIL-STD-704 limits for inrush current, balanced load, power factor, rectification restriction, current distortio
32、n, and current spectrum for three phase, 400 Hz utilization equipment. Limit 704A 704B 704C 704D 704E 704F Inrush Current N/A N/A N/A N/A N/A 300 Percent for Loads 3 kVA Percent Unbalanced Load Figure 11 MIL-STD-704A N/A1/Figure 1 MIL-STD-704C Figure 1 MIL-STD-704D Figure 1 MIL-STD-704E or 3.33% for
33、 Loads 30 kVA Figure 1 MIL-STD-704For 3.33% for Loads 30 kVA Power Factor Figure 12 MIL-STD-704A N/A N/A N/A N/A 0.85 Lagging to Unity for Loads 500 VA and No Leading Power Factor for 100VA Rectification Restriction N/A2/N/A2/N/A2/N/A2/No Half-Wave Rectification No Half-Wave Rectification Current Di
34、stortion See Note 3/ See Note 3/ See Note 3/ See Note 3/ See Note 3/ See Note 3/ Current Spectrum See Note 3/ See Note 3/ See Note 3/ See Note 3/ See Note 3/ See Note 3/ 1/ For utilization equipment being tested to MIL-STD-704 edition B use the unbalanced load limits of MIL-STD-704C. 2/ It is highly
35、 recommended that equipment built to MIL-STD-704 editions A, B, C, or D should not use half-wave rectification. 3/ Utilization equipment specification should include requirements that reduce the likelihood of the equipment having an adverse effect on the electrical power characteristics of the aircr
36、aft. Current distortion and current spectrum limits may be imposed to minimize the undesirable effects to the electrical power characteristics. These limits should take into account the utilization equipment power draw, aircraft electrical system capacity and distribution characteristics, trade-offs
37、 with weight, volume, cost, and reliability that are specific to each type of equipment and aircraft. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-3 73. Apparatus. The test equipment should be as follows: a. Adjustable AC power supply
38、 (rotating AC source for current waveform limits) b. True RMS voltmeter c. Frequency counter d. Power meter e. Spectrum analyzer f. Distortion meter g. Current transformer h. Oscilloscope 4. Test setup. Configure the test setup as shown in figure TAC101-1. Measurements, except current, must be made
39、within 10 cm of the input power terminals of the UUT. Current measurements must be taken from the 115 Volt conductors. If the utilization equipment performance specification document imposes current waveform limits, the AC power source must be a rotating machine. 5. Compliance test. With the power s
40、ource off, install the UUT and the stimulation and monitoring equipment into the test setup of figure TAC101-1. Turn on the power source and adjust the voltage to the nominal steady state voltage of 115 Vrms (line-to-neutral) and adjust the frequency to the nominal steady state frequency of 400 Hz.
41、Close the circuit breaker, energizing the UUT. Record the inrush currents (oscilloscope traces) and record the maximum rms current of each phase in the data sheet shown in table TAC101-II. Allow sufficient time for the UUT to warm up. Conduct a performance test of the UUT according to the utilizatio
42、n equipment performance test procedures to verify that the UUT is providing specified performance for normal aircraft electrical conditions. Record the frequency in table TAC101-II. For each phase, record the voltage, VA, and power factor in the data sheet shown in table TAC101-II. Compare the calcu
43、lated percent inrush current, the load unbalance, and power factor with the limits of the applicable edition(s) of MIL-STD-704. Repeat for each mode of operation of the UUT. Confirm the UUT does not use half-wave rectification and record in the data sheet shown in table TAC101-II. If the utilization
44、 equipment performance specification document imposes current waveform limits, for each phase record the total current distortion and current spectrum in the data sheet shown in table TAC101-II and compare to the limits defined in the utilization equipment performance specification document. Repeat
45、for each mode of operation of the UUT. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-3 8Unit Under Test(UUT)AdjustableAC 3-PhasePowerSupplyStimulation & MonitoringEquipment(See Note 5)True RMSVoltmeterFrequencyCounterPowerMeterSpectrum
46、AnalyzerOscilloscopeABCGround PlaneNGNDSee Note 110 cmABCNIFUSEDCHASSISSee Note 3CAUTIONCurrentTransformers3XNotes:1. Voltage measurements shall be made within 10 cm of UUT input power terminals.2. For 3 phase 4 wire equipment, neutral connection to also be made within 10 cm of UUTinput power termin
47、als. For 3 phase 3 wire equipment, line-to-neutral measurements to bemade with neutral connection made to power supply neutral.3. CAUTION: Verify suitability of power supply NEUTRAL and GROUND connections.4. CAUTION: Verify suitability of instumentation inputs and/or use appropriate attenuation.5. S
48、timulation and Monitoring Equipment are user defined. This functional block shallprovide appropriate inputs (stimulations) and monitor UUT outputs (e.g.: RPM, signals,data, etc.)6. If current waveform limits are imposed by the detail performance specification, the ACpower source shall be a rotating
49、machine.Load MeasurementsFigure TAC101-1See Note 2CircuitBreakerDistortionMeter(See Note 6)(See Note 4)(See Note 4)(See Note 4)(See Note 4)(See Note 4)(See Note 4)FIGURE TAC101-1. Load measurement. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE T
