1、MIL-M-24350B 57 m 7777706 00300L 5 m I l I METRIC 1 31 Julv 1989 SUPERSEDING 27 September 1982 15 November 1977 (See 6.9) MIL-M-2435OB(SH) MIL-M-24350A(SH) MIL-R-24563B(SH) MILITARY SPECIFICATION MONITORS, REVERSE POWER AND POWER-SENSING, ELECTRICAL POWER (NAVAL SHIPBOARD USE) (METRIC) This specific
2、ation is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the general requirements for reverse power monitors and power-sensing monitors for
3、protection of electrical power generation equipment (see 6. i). a 1.2 classification. The type designation of reverse power and power-sensing monitors shall be in the following form (see 6.2): RP Example of part or identifying number (PIN): RP60 The nominal frequency designated in hertz (Hz). Revers
4、e power monitors covered by this specification are designated by the two letter symbol “RP“, and power-sensing monitors by the two letter symbol IIPSil. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be address
5、ed to: Commander, Naval Sea Systems Command, SEA 55Z3, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 5925 AMSC N/A DEXlION STATEMENT A. Approved for pu
6、blic release; disrribution is unlimited. THIS DOCUMENT CONTAINS do PAGES- _ -_=- T_ a =- - - =_ =- - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-M-2350B 57 a 977970b 0030082 7 - MIL -M - 2 4 3 5. OB (Sa) 2. APPLICABLE DOCUMENTS .2.1 Governme
7、nt documents, 2,l.l Specifications and standards. The following specifications and standards farm a part of this document to the extent specified herein. otherwise speczfied, the issues of these documents are those listed in the Issue of the Department of Defense Index of Specifications and Standard
8、s (DoDISS) and supplement thereto, cited fn the solicitation (see 6.2). SPECIFICATTONS Unless * FEDERAL t PPP-F-320 - Fiberboard: Corrugated and Solid, Sheet Stock (Container Grade) and Cut Shapes. MILITARY NIL-c- 901 - Shock Tests, H.I. (High-Impact); Shipboard NXE-E-$17“ - Electric Power Eqpipment
9、, Basic Requirements MIL-P-15024 - Plates, Tags and Bands or Identification of MIL-P-5024/5 - Platzes, Ientifi-cation. MIL-S-16036 - Switchgear, Power, Naval Shipboard. MIL-C-195OQ - Semconductar Devices, General Specification for. MIL-K-38510 - Microcircuits, General Specification for. MIL-E-17555
10、- Electronic and Electrical Equipment, Accessories., MIL-L-19140 - Lumber and Plywood, Fire-Retardant Treated. Machinery, Equipment and Systems, Requirements for. (“aval ShTpboard Use). Equipment. and Provisioned Items (Repair Parts) : Packaging of. STANDARDS MILITARY MIL-STD-167-1 - Mechanical Vibr
11、ations of Shipboard Equipment (Type I- Environmental and Type II-Internally Excited). MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts. MIL-STD-461 - Electromagnetic Emission and Susceptibility Requirements for the Control of Electromagnetic Interference. MIL-STD-471 - Mainta
12、inablity/VeriicationDeotraio/Evalution. MIL-STD-701 - Lists of Standard Semiconductor Devices. MIL-STD-740 - Airborne and Structureborne Noise Measurements MIL-STD-781 MIL-STD-1399, - Interface Standard for Shipboard Systems-Electric MIL-CTD-1562 - Lists of Standard Microcircuits. =. and Acceptance
13、Criteria of Shipboard Equipment. - .Reliability Testing for Engineering Development, Qualification, and Production. Section 300 Power, Alternating Currene (Metric), 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(Unless otherwise indicated, copies
14、 of federal and military specifications and standards are available from the Naval Publications and Forms Center, (ATTN: NPODS), 5801 Tabor Avenue, Philadelphia, PA 19120-5099.) 2.2 Order of precedence, In the event of a conflict between the text: of this document and the references cited herein, th
15、e text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Qualification. The monitors furnished under this specification shall be products which are qualified for listing
16、on the applicable qualified products list at time set for opening of bids (see 4.4 and 6.6). 3.2 General requirements. The monitors shall be in accordance with the requirements of MIL-E-917, and the requirements of this specification except as otherwise specified in the contract or order. 3.2.1 Pain
17、ting. Parts not fabricated of a corrosion-resisting material or having a corrosion-resistant treatment as specified in MIL-E-917 except for semi- conductors, shall be painted as specified in MIL-E-917. Only one coat of gray enamel shall be applied on the outside of the enclosure. Touching-up will be
18、 permitted for marks or scratches due to factory handling. Cadmium plating spec- ified in MIL-E-917 shall not be used. 3.3 Performance. 3.3.1 Alternating current (ac) monitors. The ac monitor, when connected similarly to that shown on figure 1 to a 3-phase ac generator with any leading or lagging po
19、wer factor (pf) condition, shall perform the functions specified herein. The power characteristics are as specified in MIL-STD-1399, section 300. Each monitor shall receive a 3-phase, 115 volt supply from the generator side of the generator circuit breaker via open delta connected potential transfor
20、mers. The monitor current sensing supply shall be obtained from two current transformers with a rated 5 ampere secondary current. One current transformer is located in phase A, and the other in phase C. The monitor shall not be damaged by voltages from O through 160 volts, currents to 10 amperes, an
21、d by frequencies from O through 63 Hz during the time the generators are coming up to rated speed. 3.3.1.1 Trip pickup, reverse power monitors. The performance of the monitor shall not be adversely affected under reverse power conditions by a generator load unbalance up to 50 percent at 0.4 lagging
22、to unity pf and a phase voltage unbal- ance up to 5 percent. Under any combinations of unbalance, on any phase up to these limits, the monitor shall provide tripping action at a preset reverse power level of 2.5 to 10 percent of rated load reverse power at unity pf (see 3-3.4). The trip point shall
23、be continuously adjustable over this range. The monitor shall not trip under any condition of forward 3-phase pawer, with load unbalance up to 100 percent and pf from 0.4 to unity, leading or lagging. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
24、-3.3,1.2 Trip pickup, power-sensinv monitors. Power level to actuate the monitor shall be between 80 to 130 percent of rated power at unity pf for each stage (see 3.3.4). mon-itor is reduced to 85 i“electt.irr strength Vlbxae3bn Shack. resiseance ka33K-up :sensfng, - luaiif cat ior inspect ion X X x
25、 X X X- X X X X X .x X X X X X X X Requalif icatior inspection .x - X X X x X X X X X X X X -x X - - - tequir ement paragraph 3.2 3.6 3.2 3.12 3.3 3.18 3.9 3.3 3.5 3.3 3.3 3.3.1 3.16 . 3.17 3.19 3.20 3.13 3.14 3.15 In spec t ion paragraph 4.6 4.7.1 4.7.2 4.7.3 4.7.4 4.7.5. 4.7.6 4.7.7.2 4.7.7.3 4.7.
26、7.4 4.7.7.5 4.7.8 4.7.9 4.7;10 4.7.11 4.7.12 4.7.13 4.7.14 4.7.15 Required for reverse power monitors only. 4.6 Quality conformance inspection report. (See 6.3). 4.7 Test procedures. Tests, as specified herein, shall be performed on both reverse power and power-sensing monitors. 4+7.1 Enclosure. The
27、 enclosure shall be as shown on figure 2 or 3. 4.7.2 Creepage and clearance. Creepage and clearance distances shall be demonstrated by actual measurement to be in accordance with MIL-E-917. 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-243
28、508 59 M 7799706 0030091 B I - 4.7.3 Insulation resistance. Insulation resistance shall be as specified in 3.12. The measurement of insulation resistance shall be made with all circuits of equal voltage above ground connected together, Circuits or groups of circuits of different voltage above ground
29、 shall be tested separately. Insulation resistance shall be measured with an insulation-resistance-indicating meter at 500 volts direct current (Vdc). The time of test voltage application shall not be less than 60 seconds. Measurements shall be made at room temperature (20 to 25OC). The relative hum
30、idity and surrounding temperature shall be recorded. The monitor shall not be damaged when the generator cables or the external monitor leads are tested between phases with the 500 Vdc tester. 4.7.4 Wiring. The connecting potential leads and shunt trip coil leads under rated operating conditions sha
31、ll be sequentially opened and closed and the current leads shorted. The monitor shall then be inspected for damage. 4.7.5 Warm-up. When the monitor is subjected to rated voltage and frequency at both 10 and 65OC ambient, the equipment shall meet the requirements Specified in 3.3 and 3.18. 4.7.6 Temp
32、erature rise. The temperature rise shall be monitored for compliance with 3.9. 4.7.7 Sensine;. 4.7.7.1 AC monitors. The monitor shall be tested when connected as shown on figure 1. The test power supply shall be 115 volts plus or minus 10 percent and 60 Hz plus or minus 5 percent. The power supply s
33、hall be connected to a common load bus. The definition of load unbalance and voltage unbalance is as specified in 6.7. The burden placed on each current transformer by the monitor shall be as specified in 3.3.3.1. 4.7.7.2 Sensing test. Each monitor shall perform within the specified power and time d
34、elay limits (see 3.3.4 and 3.3.5) when at an operating temperature range between 10 and 65OC, setting as specified in 3.3.4 and 3.3.5. During the testing specified in 4.7.7.2.1 through 4.7.7.2.4, it shall be demonstrated that the monitor has tripped the applicable circuit breakers for at least 40 op
35、erations as specified in 3.5 Reverse power monitors shall be tested as specified in 4.7.7.2.1 through 4.7.7.2.3. Power-sensing monitors shall be tested as specified in 4.7.7.2.3 and 4.7.7.2.4. For reverse power monitors there shall be no circuit breaker tripping under any condition of forward power.
36、 Quality conformance tests shall be done at room temperature (20 to 25OC). Trip points and trip delay points shall be tested for accuracy and repeatability over the operating temperature range of 10 to 65OC. Room temperature (20 to 25OC) is the reference. In each test, the trip shall be tested at ea
37、ch current . 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4,7.7,2.1 Sensing test #1. Sensing test #1 shall be conducted as follows: Ac systems shall have a 3-phase load on the bus, for both a leading and lagging pf of 0.4, 25 percent of its rat
38、ed capacity to the bus. Under thfs condition, stop the generator prime mover. with the generator supplying 100 percent of its rating to the bus. breaker shall trip. Repeat each of the above tests three times. Close the circuit breaker with the generator being tested contributing The circuit breaker
39、shall trip. Repeat the above test The circuit 4,7.7.2.2 Sensing test #2. Sensing test #2 sha be conducted as follows: Adjust the test generator to supply approximately 25 percent of its rating to the 3-phase power bus and on phase AB of the power bus provide a 15 percent load unbalance (see 6.7) wit
40、h the resulting unbalance on all phases. Under the above conditions, wfth each a 0.4 leading and a 0.4 lagging pf, stop the prime mover. The monitor shall trip the generator circuit breaker within the trip settings as specifled in 3,3.4, and trip delay as specified in 3.3.5. In addition, repeat the
41、abave load unbalance tests on each phase BC and CA. tests at approximately 80 percent of the generator load capacity. I Also repeat all of the above 4.7,7.2.3 Serrs.inR test #3. Sensing test #3 shall be conducted as follows: Connect the test generator to the energized 3-phase bus with no load on pha
42、se AB and 100 percent generator load on phases BC and CA. Repeat the above test at various leading and lagging pf from 0.4 to- unity and resuiting 3-phase voltage unbalance. The montor shall not trip the circuit breaker. Repeat the above no-load test on each phase B and CA, 4.7,7.2.4 Sensing test #4
43、. Sensing test #4 shall be conducted as follows: With the monitor Connect the test generator to a balanced load on a 3-phase bus. pickup settings at lower and upper adjustment in accordance with 3.3.4 and at least one other settfng, test for complfance with 3.3.4 and 3.3.5, 4.7.7.3 Trip recovery tes
44、t, The monltor tr5p deIay shall be set at approx- imately 10 secanas, trip Condition is sensed for 5 seconds. The power sensed by the monitor shall be immediately changed to foEwarrd power- The breaker sall not trip. The monFeor shalI be sabjected ta reverse power so that a 4.7,?.4 Current c5rcutt o
45、verload. The monftor current sensor input shall be increased to 0 amperes (forward power for reverse power monitors anl Packaninn requirements. Monitors shall be preserved level A, C or commercal, and packed Level A, B, C: or commercial, as specified (see 6.2) and marked in accordance with MIL-E-175
46、55 and shall include bar codes and applicable packaging acquistion options therein as specified (see 6.2). In addition, for Navy acquisitions, the. following applies: 14 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(a) Navy fire-retardant requirem
47、ents. (1) Lumber and plywood. Unless otherwise specified see 6.2, all lumber and plywood including lamimaterial used in shipping container construction members, blocking, bracing, and reinforcing shall be fire-retardant treated material conforming to MIL-L-19140 as follows: Levels A and B - Type II
48、- weather resistant. Category I - general use. Level C - Type I - non-weather resistant. Category I - general use. (2) . Fiberboard. Unless otherwise specified (see 6.2), fiberboard used in the construction of class-domestic, non-weather resistant fiberboard and cleated fiberboard boxes including in
49、terior packaging forms shall meet the flamespread and the specific optic density requirements of PPP-F-320 and amendments thereto. 6. NOTES 6.1 Intended use. The reverse power monitor, when mounted in a generator control unit, shall sense a power reversal on a 60 Hz, 3-phase generator, and cause the tripping of the circuit breaker for the motorized generator to prevent damage to its prime mover. The p
