1、 MIL-HDBK-704-7 9 April 2004 DEPARTMENT OF DEFENSE HANDBOOK GUIDANCE FOR TEST PROCEDURES FOR DEMONSTRATION OF UTILIZATION EQUIPMENT COMPLIANCE TO AIRCRAFT ELECTRICAL POWER CHARACTERISTICS 270 VDC ( PART 7 OF 8 PARTS ) This Handbook is for guidance only. Do not cite this document as a requirement. AM
2、SC N/A AREA SESS NOT MEASUREMENTSENSITIVE Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-7 ii FOREWORD 1. This handbook is approved for use by all Departments and Agencies of the Department of Defense. 2. This handbook provides guidance
3、 on test procedures for demonstration of 270 VDC utilization equipment to determine compliance with the applicable edition of MIL-STD-704. 3. MIL-HDBK-704-7 is Part 7 in a series of 8 Parts. Part 7 describes the test methods and procedures to demonstrate that 270 VDC utilization equipment is compati
4、ble 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 Command, Code 4.1.4, Highway 547, Lakehurst, NJ 08733-5100 or ema
5、il 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 www.dodssp.daps.mil/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-7
6、 iii CONTENTS 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. TEST METHODS INFORMATION 1 4.1 Demonstration of compatibility 1 4.
7、1.1 Recording performance. 1 4.2 Calibration of test equipment 1 4.3 Test methods . 2 5. TEST METHODS. 4 METHOD HDC101 Load Measurements . 5 METHOD HDC102 Steady State Limits for Voltage . 10 METHOD HDC103 Voltage Distortion Spectrum 14 METHOD HDC104 Total Ripple 21 METHOD HDC105 Normal Voltage Tran
8、sients 26 METHOD HDC201 Power Interrupt. 37 METHOD HDC301 Steady State Limits for Voltage . 42 METHOD HDC302 Abnormal Voltage Transients 46 METHOD HDC401 Steady State Limits for Voltage . 56 METHOD HDC501 Starting Voltage Transients 60 METHOD HDC601 Power Failure . 65 METHOD HDC602 Phase Reversal 69
9、 6. NOTES 74 6.1 Intended use 74 6.3 Subject term (keyword) listing 74 TABLE HDC-I. Summary of 270VDC utilization equipment MIL-STD-704 compliance tests 3 CONCLUDING MATERIAL 74 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-7 1 1. SCOP
10、E 1.1 Scope. This handbook provides, as guidance, test methods used to demonstrate that 270 VDC utilization equipment is compatible with the electric power characteristics of the applicable edition(s) of MIL-STD-704. This handbook is for guidance only and cannot be cited as a requirement. 2. APPLICA
11、BLE 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 Specifications, standards, and handbooks. The following specifications, stan
12、dards, 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 online at http:/assist. daps.dla.mil/quicksearch or www.dodssp.dap
13、s.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 this handbook. 4. TEST METHODS INFORMATION 4.1 Demonstration of compatibil
14、ity. This section contains the test methods which will ensure that 270 VDC utilization equipment is compatible with the electric power characteristics of the applicable edition(s) of MIL-STD-704, by testing the Unit Under Test (UUT) in accordance with the test procedures as described in test methods
15、 HDC101 through HDC602. 4.1.1 Recording performance. In table HDC-I, record the edition(s) of MIL-STD-704 that defined the aircraft electric power characteristics used for testing and the performance of the UUT for each of the test methods. 4.2 Calibration of test equipment. . Test equipment and acc
16、essories 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. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
17、-,-MIL-HDBK-704-7 2 The 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 HDC-I are provided in section 5 of this handbook. Provided by IHSNot for ResaleNo reproduction or networking permitted w
18、ithout license from IHS-,-,-MIL-HDBK-704-7 3 TABLE HDC-I. Summary of 270 VDC utilization equipment MIL-STD-704 compliance tests. UUT: Compliance to MIL-STD-704 Edition(s): Test Dates: Test Method Description Performance (Pass/Fail) Comments Normal, Aircraft Electrical Operation HDC101 Load Measureme
19、nts HDC102 Steady State Limits for Voltage HDC103 Voltage Distortion Spectrum HDC104 Total Ripple HDC105 Normal Voltage Transients Transfer, Aircraft Electrical Operation HDC201 Power Interrupt Abnormal, Aircraft Electrical Operation HDC301 Abnormal Steady State Limits for Voltage HDC302 Abnormal Vo
20、ltage Transients (Overvoltage/Undervoltage) Emergency, Aircraft Electrical Operation HDC401 Emergency Limits for Voltage Starting, Aircraft Electrical Operation HDC501 Starting Voltage Transients Power Failure, Aircraft Electrical Operation HDC601 Power Failure HDC602 Polarity Reversal Provided by I
21、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-7 4 5. TEST METHODS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-7 5 METHOD HDC101 Load Measurements POWER GROUP: 270 Volt DC AIRCRAFT E
22、LECTRICAL OPERATING CONDITION: Normal PARAMETER: Load Measurements 1. Scope. 1.1 Purpose. This test procedure is used to verify that 270 volt DC power utilization equipment meets the load limits, inrush limits, current distortion limits and current spectrum limits that may be required by the utiliza
23、tion equipment performance specification document. 2. Validation criteria. If required by the utilization equipment performance specification document, the utilization equipment is considered to have passed if the utilization equipment is within the load limits, inrush current limits, the current di
24、stortion limit, and the current spectrum limits specified in the utilization equipment performance specification document. As noted in table HDC101-I, the load limits, inrush current limits, the current distortion limit, and the current spectrum limits are not specified in MIL-STD-704 versions A thr
25、ough F. The utilization equipment must not suffer damage or cause an unsafe condition. Note: The utilization equipment performance specification document should include requirements that reduce the likelihood of the equipment having an adverse effect on the electrical power characteristics of the ai
26、rcraft. Load, inrush currents, current distortion and current spectrum limits may be imposed to minimize undesirable effects to the electrical power characteristics. These limits should take into account the utilization equipment power draw, aircraft electrical system capacity and distribution chara
27、cteristics, trade-offs with weight, volume, cost, and reliability that are specific to each type of equipment and aircraft. TABLE HDC101-I. MIL-STD-704 limits for load, inrush current, current distortion factor, and current spectrum for 270 volt DC utilization equipment. Limit 704A 704B 704C 704D 70
28、4E 704F Inrush Current N/A1/N/A1/N/A1/N/A1/N/A1/N/A1/Load (VA) N/A1/N/A1/N/A1/N/A1/N/A1/N/A1/Current Distortion Factor N/A1/N/A1/N/A1/N/A1/N/A1/N/A1/Current Spectrum N/A1/N/A1/N/A1/N/A1/N/A1/N/A1/1/. Limits for load, inrush current, current distortion factor, and current spectrum must be defined in
29、the utilization equipment performance specification document and are unique to each equipment. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-7 6 3. Apparatus. The test equipment should be as follows: a. Adjustable DC power supply b. Tr
30、ue RMS voltmeter c. Power meter d. Spectrum analyzer e. Distortion meter f. Current transformer g. Oscilloscope 4. Test setup. Configure the test setup as shown in figure HDC101-1. Measurements, except current, must be made within 10 cm of the input power terminals of the UUT. The current measuremen
31、t must be taken from the 270 volt DC conductor. 5. Compliance test. With the power source off, install the UUT and the stimulation and monitoring equipment into the test setup of figure HDC101-1. Turn on the power source and adjust the voltage to the nominal steady state voltage of 270 VDC. If the u
32、tilization equipment performance specification document: a. Imposes inrush current limits, close the circuit breaker, energizing the UUT. Record the inrush current in the data sheet shown in table HDC101-II and compare with the limits of utilization equipment performance specification document. Allo
33、w sufficient time for the UUT to warm up. Conduct a performance test of the UUT according to the utilization equipment performance test procedures to verify that the UUT is providing specified performance for normal aircraft electrical conditions. Repeat for each mode of operation of the UUT. b. Imp
34、oses load limits, energize the UUT. Allow sufficient time for the UUT to warm up. Conduct a performance test of the UUT according to the utilization equipment performance test procedures to verify that the UUT is providing specified performance for normal aircraft electrical conditions. Record the l
35、oad (Volt-Amps) and the voltage in the data sheet shown in table HDC101-II and compare with the limits of utilization equipment performance specification document. Repeat for each mode of operation of the UUT. c. Imposes current distortion limits, energize the UUT. Allow sufficient time for the UUT
36、to warm up. Conduct a performance test of the UUT according to the utilization equipment performance test procedures to verify that the UUT is providing specified performance for normal aircraft electrical conditions. Record the current distortion factor in the data sheet shown in table HDC101-II an
37、d compare with the limits of utilization equipment performance specification document. Repeat for each mode of operation of the UUT. d. Imposes current spectrum limits, energize the UUT. Allow sufficient time for the UUT to warm up. Conduct a performance test of the UUT according to the utilization
38、equipment Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-7 7 performance test procedures to verify that the UUT is providing specified performance for normal aircraft electrical conditions. Record the current spectrum (current amplitude
39、 vs. frequency) in the data sheet shown in table HDC101-II and compare with the limits of utilization equipment performance specification document. Repeat for each mode of operation of the UUT. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK
40、-704-7 8 Unit Under Test(UUT)AdjustableDC PowerSupplyStimulation & MonitoringEquipment(See Note 4)+Ground Plane-GNDSee Note 110 cm+-CHASSISSee Note 2CAUTIONHall EffectCurrent ProbeNotes:1. Voltage measurements shall be made within 10 cm of UUT input power terminals.2. CAUTION: Verify suitability of
41、power supply MINUS and GROUND connections.3. CAUTION: Verify suitablity of instrumentation inputs and/or use appropriate attenuation.4. Stimulation and Monitoring Equipment are user defined. This functional block shall provideappropriate inputs (stimulations) and monitor UUT outputs (e.g.: RPM, sign
42、als, data, etc.)Normal Operation - Load and Current Distortion MeasurementFigure HDC 101-1(See Note 5)True RMSVoltmeterPowerMeterSpectrumAnalyzerOscilloscope DistortionMeter(See Note 3)(See Note 3)(See Note 3)(See Note 3)(See Note 3)FIGURE HDC101-1. Normal operation - load and current distortion mea
43、surement. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE HDC101-II. Sample data sheet for HDC101 load measurements. Parameter Measurement Unit Performance Pass/Fail Inrush Current Amps Voltage VDC N/A Load (VA) VA Total Current Distortion % Cu
44、rrent Distortion Current Spectrum Attach Spectrum Plot Amplitude vs. Frequency 9 MIL-HDBK-704-7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-704-7 10 METHOD HDC102 Steady State Limits for Voltage POWER GROUP: 270 Volt DC AIRCRAFT ELECTRIC
45、AL OPERATING CONDITION: Normal PARAMETER: Steady State Limits for Voltage 1. Scope. 1.1 Purpose. This test procedure is used to verify that 270 volt DC power utilization equipment operates and maintains specified performance when provided power with voltage at that the Normal Low Steady State (NLSS)
46、 limits and the Normal High Steady State (NHSS) limits as specified in the applicable edition(s) of MIL-STD-704. 2. Validation criteria. The utilization equipment is considered to have passed if the utilization equipment operates and maintains performance as specified in the utilization equipment pe
47、rformance specification document for normal aircraft electrical conditions when supplied input power of voltage at the specified normal steady state limits of the applicable edition(s) of MIL-STD-704 and as noted in table HDC102-I. The utilization equipment must maintain specified performance for a
48、length of time that confirms the utilization equipment can continuously operate at the steady state voltage and frequency limits and should be, not less than thirty (30) minutes for each of the test conditions. The utilization equipment must demonstrate re-start at the steady state voltage limits. The utilization equipment must not suffer damage or cause an unsafe condition. Note: If the utilization has exactly the same full performance requirements for abnormal steady state limits and emergency steady state limits as required for the normal aircraft electrical conditions, then performance
