1、i. 1-1-19928( csj 1-1-190281)( os) 3 Ilay 1971 Super sed ing 7 Noveniber i967 MILITARY SPECIFICATION INVERTER (FOR IIIoRPEDo MARK 37 MODS O, 2, AND 3) This specification has been approved by the Naval Ordnance Systems Command, Department of the Navy. 1. SCOPE 1.1 This specification establishes the r
2、equirements for the procure- ment of an inverter, Drawing 1263725, that transforms 26 volt dc .battery voltage into regulated 3-phase, 400 Hertz (Hz), ac voltage of il5 volts average of the three line-to-line voltages. 2. APPLICABLE: DOCUMENTS 2.1 The following documents of the issue in effect on th
3、e date of in- vitation for bids or request for proposal form a part of this specifica- tion to the extent specified herein. SPEK!mCAIPIONS Federal . QQ-2-325 Military MIL-P-1x5 MIL -M- 3171 MIL-C-5541 Zinc Coating, Electrodeposited; Requirements for Preservation, Methods of Magnesium Alloy; Processe
4、s for Corrosion Protection for Chemical Films for Aluminum and Aluminum Alloys Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-KCL- I - 1902 inverter load at 98 pius or minus 2 percent of rated load. The inverter will be sjected to the follow- 3.3.1.
5、2.2.1 Open circuit source voltage prior to starting at 24. plcls 3.3.1.2.2.2 Open circuit source voltage prior to starting at 24 plus or ninus 0.2 vo.ts dc; inverter load at 62 plus or minus 2 percent 03 rated load. 3.3.1.2.2.3 Open cixuit source voltage prior to starting at 28 plus e 5 Provided by
6、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-19028E6 OS) or minus 0.2 volt.s dc; inverter load inver3er load at 62 plus or minus 2 percent of rated load. 3.3.1.3 Output 3.3.1.3.1 Rated load. The rated output load shall be 3-phase, 550 volt-amperes, 64 p
7、ercent lagging power factor, balanced delta, at li5 volts root-mean-square (rms), 400 Hz. 3.3.1.3.2 Voltage. The three regulated line-to-line voltages shall be within, ana remain within, il5 plus or minus 1 volts rmS, with the dilference between any two line-to-line voltages not to exceed 1 volt ms.
8、 limits once during each 10 hours of operation. The output voltage may be reset to hold within the specified 3.3.1.3.2.1 Peak voltage. The instantaneous voltage shall not ex- ceed plus or minus 250 volts peak. 3.3.1.3.3 Frequency. The frequency shall be 400 plus or minus 4 Hz. The frequency may be r
9、eset to hold within the.specified limits once during each 10 hours of operation. 3.3.1.3.4 Regulation. The output voltage measured at the inverter terminals shall be within the limits of 3.3.1.3.2 and the output fre- quency shall be trithin the limits of 3.3.1.3.3, when the inverter is subjected to
10、the following conditions: 3.3.1.3.4.1 Increasing voltage as specified in 33.1.2.1 with 62 plus or minus 2 percent rated load and after a steady state value over the range of 24 to 28 volts dc is reachea, 3.3.1.3.4.2 Step-voltage as specified in the conditions of 3.3.1.2.2. 3.3.1.3.5 Phase sequence.
11、The phase sequence of the output voltage, with the inverter terminals connected in conformance with 3.3.2.4.3, shall be ABC. 3.3.1.3.6 Harmonic voltage content - 3.3.1.3.6.1 Total- harmonic voltage The total harmonic voltage con- tent to 10 kiloHertz (kHz) shall not exceed 2 percent of the fundament
12、al - output voltage. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-17028E 13 777970b 030013b 7 i . 3.3.1.3.6.2 Individual harnonic voltages. Ail harmonic voltages except The the 7th shall not exceed 1 percent of the fundamental output volta
13、ge. 7th harmonic voltage shall not exceed: 1.5 percent of the fundamental out- put voltage * 3.3.1.3.7 Mcdulayion. Output voltage modulation shall not exceed 1 percent of the output voltage when the inverter i,s operating in accord- ance with 3.3.1.2.2. - 3.3.1.3.8 Response time 3.3.1.3.8.1 Step-vol
14、tage start. At 3 second8 maximum after the iwerter is started under the conditions of 3.3.1.2.2,. the output voltage, phase balance, and frequency shall be within, and remain within, the limits of 3.3.1.3.2 and 3.3.1.3.3. 3.3.1.3.8.2 increasing voltage start. .Within seconds maxim after the inverter
15、 is started in accordance with 3.3.1.2.1, the output voltage, phase balance, and fkequency shall be within, arid remain within, the limits of 3.3.1.3.2 and 3.3.1.3.3. 3.3.1.3.9 Recovery time. At 0.1 second maximum after the inverter load is instantaneously switched from 62 plus or minus 2 percent to
16、 98 plus or minus 2 percent of rated load, the AB phase voltage shall be within, and remain within, li5 plus or minus 1 volts rms; the output frequency shall be within, and remain within, 400 plus or minus 4 Hz. shall be me% under the input requirements of 3.3.1.1. These requirements 3.3.1.4. Effici
17、ency. The minimum efficiency of the inverter, at 98 plus or minus 2 percent rated load, shall be not less than 40 percent. minimum efficiency of the inverter at 62 plus or minus 2 percent rated load shall be not less than 35 percent. The 3.3.1.5 Commutation. Commutation shall be such that not more t
18、han fine pinpoint spazking occurs when the inverter is operated at 98 plus or minus 2 percent and 62 plus or minus 2 percent of rated load. 3.3.1.6 Dielectric requirements 3.3.1.6.1 DC circuits. AU dc circuitry of the inverter must be capable of withstanding 500 volts rm, 60 Hz to the frame, with th
19、e ac circuits grounded to the frame, for a perid of at least 1 minute without any arc- ing or breakdm of insulation. 3.3.1.6.1.1 The insuat ion re sistance minimum between all inverter dc circuits grounded to the frame. at 500 volts dc shall be .lo0 megohms and ,the frame, with all ac circuits 7 Pro
20、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-m-I-l9028E( OS) 3.3.1.6.i.i Within 3 hours of completion of the tempe:a+ure and megohm mnirmmi. humidity nonoperating test, the insulation resistance shall be 1 3.3.1.6.1.1.2 Within 48 hours of completion
21、of the temperature and hmidity nonopersking test, the insulation resistance shall be 100 megohms minium. 3.3.1.6.1.1.3 On completion of high temperature Dperating test and while still at the operating temperature, the insulation resistance shall be 20 megohms minimum. 3.3.1.6.1.1.4 On Completion of
22、high temperature operating test and . within 1 hour of returning to dient temperature, the insulation resistance shall be 100 megohms minimum. 3.3.1.6.2 AC circuits. All ac circuits of the inverter must be capble of withstanding 1250 volts rms, 60 Hz to the frame, with the dc circuit grounded to the
23、 frame, for a period of at least 1 minute without any arcing or breakdown of insulation. 3.3.1.6.2.1 The insulation resistance at 500 volts dc shall be 100 megohms minimum between all inverter ac circuits and the frame, with all dc circuits grounded to the frame. 3.3.1.6.2.1.1 Within 3 hours of comp
24、letion of the temperature and humidity nonoperating test, the insulation resistance shall be 1 megohm minimum. 3.3.1.6.2.1.2 Within 48 hours of completion of the temperature and humidity nonoperating test, the insulation resistance shall be 100 megohms minbum. 3.3.1.6.2.1.3 On completion of high tem
25、perature operating $est and wble still at the operating temperature, the insulation resistance shall be 20 megohms minimmu. 3.3.1.6.2.1.4 On completion of high temperature operating test and within 1 hour of returning to ambient temperature, the ins+ation resistance shall be 100 megohms minimum. 3.3
26、.1.7 Running tine, The maximm continuous running time of the inverter shall be 90 minutes, followed by sufficient time for the unit to cool to anibient temperature. I 3.3.1.8 Start-stop life. The inverter shall be capable of withstanding a minimum of 1000 start-stop operations during its life in add
27、ition to the start-stop operations encountered during testing to this specification. - - - =-. measure and record the following: 4.4.5.1.2.1 Lx: input voltage. Measure and record the input voltage as near the inverter terminals as possible, using a 0-50 volt dc volt- meter ( 4.4.3.2. i). 16 Provided
28、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-I-17028E 13 777970b 0300146 T MIL- I -1923E ( os) 4.4.5.1.2.2 DG input current. Measure and record the input current, using a 0-50 ampere dc ameter (4.4.3.3). 4.4.5.1.2.3 AC output voltage. Measure and reco
29、rd the %kee zc output Tnese VOX- line-to-line voltages as near the inverter terminals as possiDle, usig a 0-150 volt ras voltmeter-(4.4.3.2.2) calibrated t 400 Xz. ages shall meet the requirements of 3.3.1.3.2. 4.4.5.1.2.4 Output frequency. Measure and record the phase AB fre- quency, using the elec
30、tronic frequency counter (4.4.3.5). sl=all be within the limits of 3.3.l.3.3. This frequency 4.4.5.1.2.5 Total ac output watts. Use two wattmeters (4.4.3.4) with 0-100 volts ras, 400 cimua peak- to-peak voltage. This reading shall be called E max. 4.4.5.1.2.7.2 Adjust the trace vertical position con
31、trol and the vertical gain control on the oscilloscope so that only about one quarter of the pos- itive half of the waves can be seen on the screen. calibrator, measure and record the maximum difference noted between the voltage peaks on the screen. 6. Using the oscilloscope This reading shall be ca
32、lled E. See Figure 4.4.5.1.2.7.3 Modulation limit. Modulation shall not exceed the limit specified in 3.3.1.3.7 when calculated according to the following formula and using the data of 4.4.5.1.2.7.01 and 4.4.5.1.2.7.2. .- I t Provided by IHSNot for ResaleNo reproduction or networking permitted witho
33、ut license from IHS-,-,-I MIL-I-17028E 13 m 7777706 0300147 1 I- ,. - I. - r- mi,-i - 190283 ( OS) Percent madation =- A E (100) E max - 4.4.5.1.2.8 Comtation. Observe the sparking which occurs between If more than fine the motor comztor and the brushes. If only fine pinpoint sparking is noted, reco
34、rd the comtation as “satisfactory“, spazks are noted, record the comutation as unsatisfactoryi For this test, remove the end bell so tht the brushes can be observed. 4.4.5.1.3 Peak starting current and decay time. Connect the current shunt (4.4.3.10) in the input circuit and connect the oscilloscope
35、 (4.4.3.7) to the voltage terminals of the shunt. asspecified in 3.3.1.2.2.3. The conditions of 3.3.1.1.3 shall be met, as determined by the oscilloscope reading. Start the inverter 4.4.5.2 ?hase sequence. Vith the inverter operating under the load conditions specified in 3.3.1.2.2.2, connect the ph
36、ase sequence indi- cator as specified in 4,4.3.6.i. Record the phase sequence as indicated by the lamp which burns brightest. The phase sequence indicator shall not be left in the circuit after phase sequence is determined or while performing other measurements. The removal of the phase sequence CU.
37、- cuit will prevent interference with the rated Load to the inverter. The indicated phase sequence shalbe ABC. 4.4.5.3 Sop the inverter by shutting off its input power supply. Replace any end bells or covers previously removed and remove the load specified in 4.4.5.2. 4.4.5.4 Dielectric. Apply test
38、voltages to the inverter terminals, as specified in 3.3,1.6. that occurs. 4.4.5.5 Vibration. Record any arcing or insulation breakdown The inverter shall be placed on a pad (4.4.3.13) I that is mounted on a hard flat surface. The inverter shall meet the requirement of 3.3.1 , 1.1. P 4.4. Certficaton
39、. The manufacturer will certify that the require- ments of 3.2.4.8 and 3.2.4.9 have been satisfied. 4.4.7 Visual inspection 4.4.7.1 The inverter shall conform to the requirements or“ 3.3.2.4, 3.3.2.5, and 3.3.2.7 4.4.7.2 The inverter chail conform to the requirement of 3.3.2.6. 18 Provided by IHSNot
40、 for ResaleNo reproduction or networking permitted without license from IHS-,-,- -_I- MIL-I-19028E 13 = 979770b 0300348 3 = 5.1- . . .I 4 4.8 Conducted intmference 4.4.8.1 The inverter sh performance shall be within the limits specified in 3.3.1.3.2 and 3.3.1.3.3. clusion of this test, the inverter
41、shall pass all the quality conformance tests of 4.4. At the end of Once during .each 10 hours of During this test, At the con- 4.5.4 Response time 4.5.4.1 Increasing voltage. Start the inverter as secified in 3,3.1.2.1. Response time shall be measured using suitable calibrated equipment (such as an
42、oscillograph in con junction with a frequency-to-voltage converter) and shall meet the requirements of 3.3.1.3.8.2. 4.5.4.2 Step-voltage. Start the inverter as s-pecified under the condi- tions of 3.3.1.2.2. Response time shall be measured with suitable calibrated equlpmnt (such as an oscillograph i
43、n con junction with a frequency-to-voltage converter) and shall meet the requrements of 3.3.1.3.8.1. 4.5.5 Over voltage. Apply an open circuit source voltage of 35 plus 2 minus O volts dc to the inverter with 62 plus or minus 2 percent of rated load connected. started, reduce the source voltage to 2
44、6 plus or minus 2 volts dc. inverter shall-khen meet the requirements of 3.3.1.3.2 and 3.3.1.3.3. Within 30 plus or minus 5 seconds after the inverter is The 4.5.6 Load change recovery time. Start the inverter as specifi.ed in 3.3.1.2.2.2 and 3.3.1.2.2.4. the inverter output to a load of 98 plus or
45、minus 2 percent of rated load. For each of these starting conditions, switch 21 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-I-17028E 13 3799706 0300151 3 m-1-19028E( os) Recovery time shall be measured with suitable cdibrzteil equipmeEt (auc
46、h as an oscillograph in conjunction xith a frequency-to-uoltage cowerte) and shall meet the rec,urements of 3.3.1.3.9. 4.5.7 Harmonic voltages. . Start and operate the inverter as specified in 4.4.4.1, 4.4.4.2, 4.4.4.3j and 4.4.4.4. Using a wave analyzer con- nected across the AB phase, measure the
47、individual odd hwmonics up to and including the twenty-fifth. The harmonic voltages shall not exceed the limits specified in 3.3.1.3.6. as: Total harmonic content is defined Etotal = v3 + E5 2 + E7 2. i- . . . . . . . .+E, 2 L5 where the subscript denotes the harmonic and all voltages are measured i
48、n the same units as the fundamental component. 4.5.8 Radiated interference 4.5.8.1 The inverter shall be tested far sine wave and random noise interference. 4.5.8.2 The rfrequency shall be scanned from 14 to 250 kHz, and meas- The inverter hookup and the determination of interference urements shall
49、be made at each frequency at which a peak OCCUJ-s. type shall be the sw as given in 4.4.8.3 and 4.4.8.4 Lor the conducted interference test, 4.5.8.3 4.58.4 A 41-inch rod antenna shall be positioned vertically a dis- tance of 3 feet from the closest edge of the inverter. shall be placed on 3/4 inch plywood with a bond to a ground plane. Antennas shall be rotated around the inver
