1、MIL-M-24116B(SH) 27 February 1985 SUPERSEDING MIL-M-24116A(SHIPS) 1 April 1965 (See 6.6) MILITARY SPECIFICATION MONITORS, VOLTAGE AND FREQUENCY, 400 HERTZ (HZ) ELECTRIC POWER This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by
2、all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the general requirements for volt- age and frequency monitors for Naval shipboard installation. 1.2 Classification. The monitors shall be of the following types as specified (see 6.2.1): Type VM1
3、 - For sensing under voltage and over voltage limits on a single phase power system and providing direct current (dc) power to trip the connected remote feeder circuit breaker. 3 phase power system and providing dc power to trip the connected remote feeder circuit breaker. Type VFM3 - For sensing un
4、der voltage and over voltage and under frequency and over frequency limits on a 3 phase power system and providing dc power to trip the connected remote feeder circuit breaker. Type VM3 - For sensing under voltage and over voltage limits on a Beneficial comments (recommendations, additions, deletion
5、s) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the
6、 end of this document or by letter. FSC 6625 .r y. THIS DOCUMENT CONTAINS -1s“ “- PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-20 APPLICABLE DOCUMENTS 2 . 1 Government documents . 2.1.1 Specifications and standards. Unless otherwise specifie
7、d, the following specifications aid standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDlSS) specified tl the solicitation form a part of this specification to the extent specified “ herein. SPECIFICATIONS MILITARY MIL-S-90 1 - MIL-C-915
8、 - MIL-C-915/30 - MIL-E-9 17 141L-E-2036 - MIL-P-15024 - MIL-P-15024/5 - MIL-0-16485 - MIL-1-46058 - STANDARDS MILITARY MIL-STD-167-1 - ML-STD-461 - MIL-STD-462 - MIL-STD-7 40 - MIL-STD-810 - DOD-STD-139 9, - Section 300 Shock Tests ; H. I . (High-Impact ) ; Shipboard Machinery, Equipment and System
9、s, Require- ments for. Cable and Cord Electrical, for Shipboard Use General Specification for. Cable, Electrical, 1000 Volts, Type TSGU. Electric Power Equipment, Basic Requirements Enclosures for Electric and Electronic Equip- Plates, Tags and Rands for Identification of Plates, Identification. Ohm
10、meters, Insulation-Resistance-Indicating Insulating Compound, Electrical (for Coating (Naval Shipboard Use) . ment, Naval Shipboard. Equipment . Portable. Printed Circuit Assemblies) . Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited) . Requiremen
11、ts for the Control of Electromagnetic Interference. Measurement of. and Acceptance Criteria of Shipbuilding Equipment . Environmental Test Methods and Engineering Guidelines. Interface Standard for Shipboard Systems Electric Power, Alternating Current (Metric). Electromagnetic Emission and Susceptib
12、ility Electromagnetic Interference Characteristics, Airborne and Structureborne Noise Measurements I -W (Copies of specifications, standards and drawings required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the c
13、ontracting officer.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-ELl11bB 66 m 9977706 0132473 b W A MIL-M-24116B(SH) 2.2 “- Other publication. The following document forms a part of this specification to the extent specified herein. The i
14、ssues of the documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and and the supplement thereto, if applicable. UNIFORM CLASSIFICATION COMMITTEE AGENT Uniform Freight Classification Ratings, Rules and Regulations (Application for copies should be addressed to
15、 the Uniform Classification Committee Agent, Tariff Publication Officer, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) (Industry association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Feder
16、al agencies.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specifi- cation shall take precedence. “ 3. REQUIREMENTS- 3.1 “_ First article. Unless otherwise specified (see 6.2.1), a sample moni- tor shall
17、be subjected to first article inspection and tests (see 4.3 and 6.4). 3.2 General re&rements. The monitors shall be in accordance with the requirements of MLL-E-917 and the requirements of this specification, except as otherwise specified in the contract or order. “- “_ 3.2.1 “0 Paintino Parts not f
18、abricated of a corrdsion-resisting material or having a corrosion-resistant treatment as specified in MIL-E-917, except or semi-conductors, shall be painted as specified in MIL-E-917 except that only one coat of gray enamel shall be applied. Touching-up will be permitted for marks or scratches due t
19、o factory handling. 3.3 *eration. The monitors, when connected as shown on figure 1, shall sense the voltage and frequency conditions of all phases of the power source output whether connected 3 phase delta oc wye (four wire grounded). In a delta connection, the phase sensing shall be between each l
20、ine. In a wye connection, the phase sensing shall be between each line and the grounded neutral. The monitors shall operate within the specified voltage and frequency ranges speci- fied in table I to provide tripping power to the circuit breaker when any one voltage or frequency exceeds the specifie
21、d limit. When the monitor is connected to the output terminals of a power source there shall be no interaction between the control circuits of the monitor and the power source. On polyphase circuits the sensors shall respond to the highest root mean square (rms) value of the phase voltage irrespecti
22、ve of the values of the remaining phases. The perfor- mance of the voltage sensors shall. be within the specified tolerances specified in table I, including the effects of line harmonics up to 4 percent per harmonic or 6 percent total. The line harmonics include all phase relationships relative to t
23、he fundamental. Frequency sensors shall operate within specified limits (see table I) under all voltage variations specified in table I and including the 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-E4LLbB bb. - _ W 9997906 0132474 B W MIL
24、-M-24116B(SH) presence of harmonics as outlined above for the voltage sensors. Under the specified under voltage and over voltage and frequency conditions, the monitor shall provide a dc supply to trip the remote circuit breaker connected in the alternating current (ac) power circuit. Energy require
25、d to trip the circuit breaker shall correspond to 300 microfarad (VI?) of capacitance charged to 125 volts dc, After the monitor has tripped the remote circuit breaker, the monitor shall automatically reset to permit closing of the circuit breaker by hand under favorable voltage and frequency condit
26、ions (see 3.4.6). The monitor shall not be damaged because of an open circuit or a ground located in the sensing leads or in the dc supply to the circuit breaker. 3.3.1 Input power. The monitor shall meet the performance requirements of 3.3 when powered in accordance with DOD-STD-1399, section 300,
27、types II and III. 3.4 “- Electrical rating. 3.41 Sensing voltages (nominal). Each monitor shall operate on an input phase voltagrof 115 volts delta, 200/115 volts wye, or 440 volts delta. The voltage application shall be determined at time of installation. 3.4.2 Sensing frequency (nominal). Each mon
28、itor shall operate on a phase input frequency of 400 Hz. 3.4.3 “ Monitor powerae-tetting_s_, The selection shall be set in the field between types II and fi- power in accordance with DOD-STD-1399, section 300, by operating an internal double throw switch. Monitor trip setting values shall be as spec
29、ified in table I. TABLE I. “ Monitor ta “. setting values (undzall conditions of system &se “ voltage, frequency - or current unbalance). I For Over vo 1 tage Under voltage Over frequency Under frequency Type II power settings 125 percent of nominal (+ 5 percent) 77 percent of nominal (+ 5 percent)
30、430-Hz (+ 5 Hz) 370 Hz (ir - 5 Hz) Type III power settings 115 percent of nominal (+ 5 percent) 87 to 90 percent nominal 420 Hz (+ 5 Hz) 380 Hz (T - 5 Hz) 3.4.4 MonitLr setting trip delay. The trip values specified in table I shall be held from 45 milliseconds (mi) minimum to 70 ms maximum to preven
31、t nuisance tripping because of possible system transients. 3.4.5 Trip energy for circuit breaker. The monitor circuit shall provide “ “ capacitor energy to trip the remote circuit breaker (200 feet maximum) two times on any one charge at all voltage and frequency conditions. The circuit breaker 120
32、volt dc shunt trip coils may have a resistance from 20 to 400 ohms. 4 Y Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-242LbB 66 3.4.6 Trip energy for breaker (external signal). The monitor shall “ include two terminals for connection of exter
33、nal leads for tripping of the circuit breaker by the monitor when a closed contact signal is received from an external device such as a protective relay (see figure 1). 3.5 “-. Static components. Field adjustment of the sensing circuits to compensate for aging of components shall be provided. 3.6 Du
34、ty. The monitor shall sense the power circuit continuously. The monitor shall provide the power to trip the breaker or 40 consecutive operations at l-minute intervals (see 4.7.7). 3.7 Enclosure. The enclosures shall be of dripproof construction in accor- “ dance with MIL-E-2036 (see 4.7.1). Similar
35、dimensioas for the height and weight shall be provided. An identical enclosure shall be provided for type VM3 and VFM3 monitors. It shall be possible to remove or install any internal component without removing the enclosure from its mounting. Mounting means shall protrude from the sides of the encl
36、osure. The mounting holes shall be suitable to take provided at the bottom of the enclosure and a cable knockout of 1-1/32 inch dia- meter shall be placed on the two sides of the enclosure. In the bottom of the enclosure a 5/16 inch screw shall be provided for a condensation drain or as a breather h
37、ole. t 5/16 inch screws. A wiring compartment approximately 2 inches high shall be 3.8 Internal components. Components shall be accessible only when the front cover of the enclosuFe-is removed. An internal single throw switch shall be provided for defeating the monitor trip circuit. The switch shall
38、 be labeled “SCR TRIP CIRCUIT“ and the positions marked “ON“ and “OFF“. A second switch shall be provided for selection of the type power needed. The switch shall be labeled “TYPE POWER“ and positions marked “II“ and “III“. The printed circuit board shall be coated in accordance with MIL-1-46058, ty
39、pes AR, SR, UR or XY. 3.9 Ventilation. Ventilation shall be by natural draft. 3.10 Environmental. 3.10.1 Ambient temperature. The normal ambient temperature shall be 50 degrees Celsius (“C). The monitor shall meet the requirements specified herein when operating over a range of 23 to 65OC. 3.10.2 “
40、Humidity. The monitor shall meet the requirements specified herein when exposed to an ambient humidity as specified in 4.7.14. 3,11 Mounting. The monitor shall be suitable for bulkhead mounting. 3.12 Size and weight. The size and weight of the equipment shall be held _. to a minimum. - “ 3.13 Insula
41、tion resistance. The insulation resistance of all circuits shall be not less than 10 megohms when measured with all circuits both hot and cold (see 4.7.3). 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.14 Dielectric stre-. Monitors shall be con
42、structed to withstand, for a period of 1 minute, a dielectric test voltage between separate circuits and to ground as E ollows (see 4.7 . 12) : “ Ac rms input or output VOlta&_e“ “ 60 and under 61 to 90 91 to 600 Over 600 “ “ Test voltage I“.“_._ rms 600 900 1000 plus twice rated 2000 plus 2-1/4 tim
43、es rated 3*15 u_“ Vibration. Monitors shall withstand type I vibration tests specified in MIL-STD-167-1 without mechanical damage or malfunctioning (see 4.7.13). 3.16 - Shock. Monitors shall withstand the shock tests specified in MIL-S-901 on the light weight machine without the use of shock mounts.
44、 With rated voltage applied, all control devices shall function properly during and after the shock test. Mounting fixture 4A of MIL-S-901 shall apply (see 4.7.14). 3.17 “ Noise. Monitors shall meet the noise requirements specified in MIL-STD-740 for type 3, grade C equipment. 3.18 Electromag_netic
45、interference (EMI). Monitors shall conform to the emission and susceptibility requirements and limits of MIL-STD-461 for class A4 surf ace ship (Servo/Synchro) equipment with the following addition: “ “- RS03 limits “ Frequency- 14 KHz to 14 GHz “_ E-field level (volts/meter) 200 1_ 3.19 Inclined op
46、eration. Monitors shall show no change in operation when inclined at an angle of 45 degrees from the vertical in any direction (see 4.7.8). “ “ 3.20 Warm-up Monitors shall meet the performance requirements specified herein af ter-being energized for a maximum of 1 minute (see 4.7 . 5) . 3.21 Co*nent
47、 “ life. Monitors shall meet the specified 168-hour component life test (gee 4*7.11). 3.22 - Diagrams and identification plates. “- _. 3+22.1 “ Connection diagram. Each monitor shall contain a diagram of electri- cal connections for external wiring with each terminal and lead designated to correspon
48、d to markings as shown on the monitor. In addition, a schematic circuit, a wiring diagram, a description of operation and a list of recommended repair parts shall be included. Diagrams and instruction sheets shall be subject to approval upon request of the Naval Sea Systems Command (NAVSEA) and shal
49、l be secured and protected in accordance with MIL-E-2036. This information shall be sealed between sheets of clear plastic material and placed in a holder mounted on the inside of the front cover of the enclosure. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-2433bB bb 9999906 0332477 3 m 3.22.2 Identification plate. Each monitor shall be provided with an identification plate in
