1、MIL-W-19088 (10) bb D 999790b 0327856 7 t UILITARY SPECIFICATION WAmHETERS, SWITCHBOARD TYPE, 4-1/2 INCH 20 October lS7E SUPERCEDING =NDMENT 9 27 June 1977 This amendment forms a part of Military Specifi- cation MIL-W-l908(SHIPC), dated 24 October 1955. PAGE 1 1.2.1.2.2, line 3: Delete “260“ and sub
2、stitute “250“. PAGE 2 1.2.1.9.1, line 1: Delete “FR491W300AC, KkW“ md substitute “HR491W300-ACKW“. PAGES 2 AND 3 2.1: Dclete reference to Military Specification *PL-I-15024“, Military Standard MIL-STD-105“, and Navy Department Specification “General Specifications for Inspection of Material“, and ad
3、d the following Military Specification and Standard: SPECIFICATION MILITARY “ML-E-15090 - Enamel Equipment, Light-Gray (Formula No. 111) .“ STANDARDS MILITARY “MIL-STD-130 - Identification Marking of U. C. Military Property.“ PAGE 4 3.1: Delete and substitute: “3.1 Qualification.- Wattmeters furnish
4、ed under this specification shall be products which are qualified for listing on the applicable qualified proucts list at the time set for opening of bids (see 4.3 and 6.3) .“ PAGE 7 “3.5.1.1, first sentence: Delete and substitute *The portion of the case exposed to view from the front of the panel
5、shall have a light-gray finish in accordance with fornula No. 111, class 2 of MIL-E-15090. PAGE 9 3.13: Delete and substitute: “3.13 Voltage influence.- The voltage influence shall not exceed the value spec when tested In accordance with 4.6.8 (see 3.271.“ PAGE 10 3.24: Delete and substitute: “3.24
6、Shock (high-impact).- When high-impact-shock resistant meters are tested accordance with 4.6.19, no screws, bearings, pivots, windows, or other parts shall become loosened, cracked, (except as specified herein), or unduly damaged. Ninor cracking or distortion of pivots will be permissible only when
7、conformance to the post shock performance has been demonstrated. of the complete scale is retained and no fragment has become dislodged. The permanent Cracking of glass windows will be penrissible only when readability f ied n FCC 6625 Provided by IHSNot for ResaleNo reproduction or networking permi
8、tted without license from IHS-,-,-MIL-W-LSOB (LO) bb 99999Ob 0229857 9 D MIL-W-19088 (S) mun“T 10 change in indication bared on calibration mada after resetting the pointer to zero or null poition (if applicable) shail not excaed the value specified (.Ce 3.27). PAGES 10 AND 11 3.25.1, line 6: elete
9、Specification MIL-1-15024 and substitute “Standard MIL-STD-130“. PAGES 11 AND 12 3.27(6): Under *Limits* elete *3“ and substitute -5“. 3.27(f) Under “Limits“: Delete and substitute: “Potential system 8 volt amperes maximimi per element at 120 volts 60 and 400 cycles for nominal 120 volt rating. For
10、higher nominal voltage ratings the maximum volt were burden shall be increased proportionately. Current iystem 2.5 volts ampere maximum per elunent for 60 cycles and 16 volts -ere maximum per clement of 400 cycles with current applied in phase with the voltage to produce end scale deflection while t
11、he potential system is energized at rated voltage and frequency. ment system, this is detennined with all current coils similarly energized.“ In a 2 ele- 3.27(i): Under “Limits“: Delete and substitute: “1 percent maximum from 1.0 to 0.5 lagging power factor.“ Add as paragraph 3.30: “3.30 4.1 (b) : D
12、elete and substitute: Power factor influence.- The power factor influence shall not exceed the value specified (see 3.27 and 4.6.21) .“ “ (b) Quality conformance inilpection (see 4.4) .I PAGE 13 Add as paragraph 4.2.11: *4.2.11 Polyphase wattmeters.- Polyphase wattmeters may be connected as single p
13、hase wattmeters and iubjected to the applicable tests specified herein subject to meeting the following requirements. (a) No mutual action shall exist between elements of the wattmeter. This requirement shall be checked by energizing the potential circuit of one element and the current circuit of th
14、e other element. Deflection of the pointer shall not exceed plus or minus 0.5 percent of scale length for this connection. This shall be checked by connecting the potential circuits in parallel and the current circuits in series opposing and energizing the wattmeter. Deflection of the pointer shall
15、not exceed plus or minus 0.5 percent of scale length. “ (b) Both elements of the wattmeter shall be matched in their characteristics. 4.3: Delete and substitute: “4.3 ualification tests.- Qualification tests shall be conducted at a laboratory sat- isfactory t$-ginearing Center. These tests shall con
16、sist of the tests specified in 4.6.“ 4.3.1, line 5: Delete “of 0.065 2 0.010-ohm resistance“. Table I: Under “Specimens, Type designation“, line 1: Delete “HR491W50OACWWA“ and Table I: Under “Specimens, Type designation“, line 2: Delete “MR492W1000ACWWA“ and substitute MR491W5OACWWH“. substitute uMR
17、492W1000ACWWHt. Page 2 of 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-U-19088 (LO) bb W 9997906 0129858 O MIL-W-190 88 (CH) AMENDMENT 10 PAGE 14 Table II: Under “Test“ column: elete “Frequency ranqe“ and substitute “Voltage Table II: Under
18、*Test“ column: Add “Power factor influence“, under “Requirement para- influence.“ graph“ column, ad6 “3.30“; uid under “Test paragraph“ column, add “4.6.21“. PAGES 15 AND 16 4.4 through 4.5.3 and Tables III, IV and V: Delete and substitute: “1.4 Quality conformance inspection.- All wattmeters shall
19、be subjected to the quality conformance inspection tests shown in table III. In case of rejection of a wattmeter to pass the quality conformance inspection. corrective masures may be approved by the Govern- ment inspector for up to three failures. The Naval Ship Engineering Center shall be advised.
20、Over three failures shall be referred to the Naval Ship Engineering Center for action. Table III - Quality conformance inspection tests. Test Ftequirement Test paragraph paragraph I Visual and mechanical inspection Position inf hence Initial accuracy (2 points) Damping factor Dielectric itress (with
21、out opening case) (See table VI) 3.8 3.9 3.10 3.20 4.6.1 4.6.3 4.6.4.2 4.6.5 4.6.15 # Table VI, column 3: Delete. PAGES 16 AVD 17 PAGE 17 4.6.5, fourth sentence: Delete. 4.6.8: Delete and substitute: “4.6.8 Voltage influence.- The voltage across the potential circuit shall be varied plus and minus 1
22、0 percent of rated voltage and a check for accuracy made at 0.8 power factor lagging and unity power factor. 4.2.9 and the readings compared with the corresponding readings of the standard meter.“ The nrmibcr of scale readings shall be as specified in PAGE 20 Add as paragraph 4.6.21: “4.6.21 Power f
23、actor influence.- Feadings shall be taken when the power factor is varied from 0.5, 0.8 lagging and unity power factor. factor shall be as specifie: in 4.2.9 and the readings compared with the corresponding read- ings of the standard meter. The number of readings at each power 4.7: Delete an8 substi
24、tute: “4.7 Responsibility for inspection.- Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirenents specified herein. Except as otherwise specified in the contract, the contractor may use his own or any other facilities suitable for
25、 the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed
26、 requirements.“ Page 3 of 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-19088 (SR) AMENDNENT 10 PAGE 21 6.3: Dclete and 8ubstLtutc* “6.3 With re8pect to products requiring qualification, awards will be nade only for products which are at th
27、e time met for opening of bids, qualifie8 for inclusion in the applicable Qualified Product6 fist QPL-19068, whether or nct such products have actually been 80 li8ted by that date. The attention of the contractors is callec! to these require- ments, and manufacturers are urge to arrange to have the
28、products that they propose to offer to the Federal Government tested for qualification in order that they nay be elioible to be awarded contracts or orders for the products covered by this specification. The activity re8ponsible for the Qualified Prducts List is Naval Ship Engineering Center, Depart
29、ment of the Navy, Washington, DC 20362, and inforration pertaining to qualification of products may be obtained frorr that activity. Application or Qualification tests shall be made Ln accordance with “Provisions Governing Qualification SD-6“ (ice 6.3.1). to Cormnanding Officer, Naval Publications a
30、nd Form Center, Pennqlvania, PA 19120.“ 6.3.1 Copies of “Provisions Governing Qualification“ may be obtained upar! application PAGE 22 Patent notice : Delete. PAGE 23 Figure 1: Delete dimension “1.250 2 .375 and substitute “0.625 2 0.125“. NOTE: The margins of this amendment are markeci I“ to indica
31、te where changes (additions, modifications, corrections, deletions) fror the previous amendment were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccura- cies in these notations. Bidder6 and contractors are cautioned to evaluate the requireme
32、nts of this document based on the entire content irrespective of the marginal notations and rela- tionship to the last previous amendment. Preparing activity: Navy - CH (Project 6625-15741) *us. QOVERNMENTCRINTINQ OFFICE: ton -SOQ.ZWBUJE Page 4 of 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
