1、IINCH-POUNDI MIL-S-24187E(SH) 22 March 1991 SUPERSEDING 15 June 1978 MIL-S-Z4187D(SH) MILITARY SPECIFICATION SWITCH ASSEMBLIES, LINEAR MOVEMENT, MANUAL AND REMOTE OPERATION, GENERAL SPECIFICATION FOR This specification is approved for use by the Naval Sen Systems Command, Department of the Navy2 and
2、 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, operating conditions, and tests for linear movement, multipole, multiposition switch assemblies for manual and remote operation. Switch assemb
3、lies are for use in low level circuits and for power circuits and for power circuits up to a maximum of 10 amperes (see 6.1). 1.2 Classification. The type designation shall be of the- following form, and as specified (see 3.1 and 6.2): I 1 Beneficial comments (recommendations, additions, deletions)
4、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 en
5、d of this document or by letter. I I AMSC NIA FSC 5930 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-24L87E 59 m 9999906 0473835 9 m Switch operation (see 1.2.1
6、) - - 3 f Wiring module (see 1.2.5) P Enclosure (see 1.2.6) (see 1.2.6) Variations (see 1.2.7) TP 4 BLS Switch Additional style fuseholders (see 1.2.3) (see 1.2.4) Contact Switch configuration style (see 1.2.2) variation (see 1.2.3.1) Basic switch v assembly When V specified (see 3.1 and 6.2) 1.2.1
7、Switch operation. , Switch operation shall be designated by a single letter as follows: M Manual operation only R Remote operation with manual override. 1.2.2 Contact configuration. Configuration of contacts on the movable contact plate shall be designated by a single digit as follows and shall be a
8、s shown on figure 1: Configuration 2 Switch action: 1, 2, off or 1, off 2 Configuration 3 Switch action: 1, 2, 3, -N, off (“N“ is the number of active Configuration 4 Switch action: off, 1, 1 and 2, 2 Configuration 4-A Switch action: 1, off, 2, 1 and 2, 1 Configuration 5 . Switch action: 1, 2, 3, 4,
9、 5, off. positions) 1.2.2,l Contact configuration variation. A letter following the basic switch style shall be used to show a contact variation for that basic switch (see 3.1). 1.23 Switch style. Switch style shall be designated by the letters LS, BLS, CLS, and so forth, indicating the basic switch
10、 style (see 3.1). 1.23.1 Switch style variation. A letter following the basic switch style shall be used to show a switch variation for that basic switch (see 3.1). 1.2.4 Additional fuseholders. Number of additional 2-circuit fuseholders required for the protection of connected load circuits shall b
11、e designated by the number specified in the applicable specification sheet (see 6.2). When no additional fuseholders are required the number O shall be 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-24187E 59 m 9999906 047383b O m usd. Fuseh
12、olders required in control circuits of remote operated switch assemblies specified in the applicable specification sheet shall not b designated as additional fuseholders. When the switch style has no provisions for mounting fuseholders, this designator shall be omitted from the type designated. 1.2.
13、5 Wiring module. When required, wiring modules for enclosed switches shall be as specified in the applicable specification sheet and figure 2. 1.2.6 Enclosure, When required, enclosures shall conform to the requirements specified in the applicable specification sheet. 1.2.7 Variations, Variations su
14、ch as connectors, different circuitry and wiring configurations shall be indicated by the designations “S“ and a number modifier (see 3.1). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a
15、part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS -. FED
16、ERAL QQ-N-290 Nickel Plating (Electrodeposited) PPP-F-320 Fiberboard: Corrugated and Solid, Sheet Stock (Container Grade) and Cut Shapes MILITARY h4IL-I431 hulation, Electrical, Synthetic-Resin Composition, Nonrigid “S-901 Shock Tests, HI (High-Impact) Shipboard Machinery, Equipment and Systems, Req
17、uirements for Indicator Light Lenses, General Specification for MILL3661 Lampholders, Indicator Lights, Indicator-Light Housings, and MILL3661/6 Lampholders, Indicator-Lights, Indicator-Light Housings and Indicator-Light Lenses Dusttight Housing, Style LH74 3 Provided by IHSNot for ResaleNo reproduc
18、tion or networking permitted without license from IHS-,-,-flIL-S-24L87E 59 m 7999906 0473837 2 M MIL-L3661/13 MIL-B-5423 - MIL-T-792-8 I“S-13282 MILL15098 MIL-L15W8/11 I“F-15160 “F-15160/77 MIL-W-16878 “W-16878/1 MIG W- 16878/4 MIL-E-17555 MILL-19140 MIL-F- 19207 MLF-19207/38 MIL-S-23190 “G-23827 MI
19、L-C-28731 MIL-C-2873 1/20 MIL-C-2873 1/23 Lampholders, Indicator Lights, Indicator-Light Housings, and Indicator Light Lenses, Dusttight Lenses, Style LC13 Boots, Dust and Water Seal (For Toggle and Pushbutton Switches, Circuit Breakers, and Rotary-Actuated Parts), General Specification for Terminal
20、s, Lug: Splices, Conductor: Crimp Style, Copper, General Specification for Silver and Silver Alloys Lamps, Glow, General Specification for Lamps, Glow, Indicator, Types C7A, BA, AlG and A1H Fuses, Instrument, Power, and Telephone Fuses, (Indicating), Style F77A Wire, Electrical, Insulated, General S
21、pecification for Wire, Electrical, Polyvinyl Chloride (PVC) Insulated, 105 “C, 600 Volts Wire, Electrical, Polytetrafluoroethylene (PTFE) Insulated, 200 “C, 600 Volts, Extruded Insulation Electronic and Electrical Equipment Accessories, and Provisioned Items (Repair Parts); Packaging of Lumber and P
22、lywood, Fire Retardant Treated Fuseholders, Extractor Post Type, Blown Fuse Indicating and Nonindicating General Specification for Fuseholders, Extractor Post Type, Blown Fuse IndiLding, Type FHL57G Straps, Clamps, and Mounting Hardware, Plastic and Metal for Cable Harness Tying and Support Grease,
23、Aircraft and Instrument, Gear and Actuator Screw Connectors, Electrical, Rectangular, Removable Contact, Formed Blade, Fork Type (for Rack and Panel and Other Applications), General Specification for Connector, Electrical, Contact, Fork Type, Crimp, Removable (8.5 Amper-) Connector, Electrical, Cont
24、act, Fork Type, Removable, Double Wire Crimp 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-24187E 59 W 9999906 0473838 4 m I“C-28731135 Connector, Electrical, Contact, Fork Type, Crimp Removable (5.0 Amperes) MIL-G-45204 Gold Plating, Elect
25、rodeposited “4-45208 Inspection System Requirements STANDARDS MILITARY MIGSTD-130 Identification Marking of U.S. Military Property “D-167-1 Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited) MILSTD-202 Test Methods for Electronic and Electrical Com
26、ponent Parts MIGSTD-1285 Marking of Electrical and Electronic Parts “D-1303 Painting of Naval Ordnance Equipment MS25100 Switch, Toggle, Two Pole, Sealed Toggle See supplement 1 for list of associated specification sheets. (Unless otherwise indicated, copies of federal and military specifications, s
27、tandards,-and handbooks are available from the Standardization Document Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 23 Order of precedena. In the event of a conflict between the text a this. document and the references cited herein (except for related specification she
28、ets), the te 6 poles shall be measured for switch assemblies having 61 - 100 poles; and 8 poles shall be measured for switch assemblies having more than 100 poles. For qualification and group C tests, measurements shall be made on 50 percent of the poles of the switch assembly. 18 Provided by IHSNot
29、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-. 4.8.2.2 Transfer time. Transfer time for an individual pole shall be measured from the time the initially closed contact opens to the time the initially open contact closes for a one position change. Measurements shall
30、 be made for single position changes -in both directions of travel for each pole being tested. The test shall be performed in room ambient conditions. Number of poles tested shall conform to 4.8.2.1(c). The transfer time shall be recorded for each actuation of each pole being tested and shall meet t
31、he requirements of 3.6.5.4. 4.8.23 Current drain. With rated voltage applied, the current in each line of the supply to the switch drive motor shall be monitored in the three conditions specified (see 3.6.5.5). Line current shall not exceed the value specified in 3.6.5.5. 4.83 Contact and bushing re
32、tention. 4.83.1 Stationary contacts and bushings. Specified loads (see 3.7.6.1 and 3.7.6.2) shall be applied externally to contacts and bushings mounted in a stationary contact plate. Applicable loads shall be applied to the split ends of the contacts and to the round ends of the bushings on the con
33、nector side of the contact plate. The two loads need not be applied simultaneously. A reduced load shall be applied to the part being tested and, after the slack between the part and its mounting has been taken up, the load shall be increased uniformly at 1 pound per second until the specified load
34、is reached. The specified load shall be maintained for 5 seconds. During and after application of the specified load, the contacts and bushings shall comply with the requirements of 3.7.6.1 and 3.7.6.2. For qualification and group C tests, a minimum o 20 Contacts and bushings evenly spaced over the
35、switch contact plate shall be tested. For group B tests, conducted when switches are offered for quality conformance inspection, 5 contacts and bushings spaced around the periphery of the switch contact plate shall be tested. For qualification or group B tests, the contact and bushing retention test
36、 may be made on completed contact plates prior to their mounting in switch assemblies. 4.83.2 Switch contact module connector pIug confacts. Specified maximum axial tension load shall be applied to each of 20 contacts spaced over the connector. Load shall be applied uniformly at the rate of 1 pound
37、per second through a size 16 AWG wire crimped to each contact. Contacts shall meet the requirements of 3.7.6.3 after three insertiow and withdrawals from the same hole. This test is not required of connectors conforming ta MIGC-28731. 4.8.4 Torque (rotational), Maximum torque required at the handle
38、shaft to operate the switch shaft with respect to the switch body, shall be measured by a torque wrench or other torque measuring device. Torque shall not exceed the requirements Specified in 3.7.6.3. Switch shall be tested in each position and in both directions. For qualification and group C testi
39、ng, the tesk shall be conducted immediately after exposure for 2 hours to the maximum temperature and then again immediately after exposure-for 2 hours to the minimum temperature specified in the applicable specification sheet. For qualification and group C testing, record the highest torque between
40、 al1 switch positions for five complete rotations. For group A testing, record the highest torque between all switch positions for one complete clockwise and one complete counterclockwise rotation. 19 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I
41、 MIL-S-24L87E 59 9999906 0473853 O 4.8.5 Stop strength. With the switch stops in place, the switch shaft shall be rotated to the clockwise and counterclockwise extremes, and the torque specified in 3.7.4 applied to the switch shaft against the stop. 4.8.6 Dielectric withstanding voltage. Switch asse
42、mbly shall be tested in accordance with method 301 of MILSTD-202. The following details shall apply: a. Test voltage shall be 1200 volts, room mean square (rms), 60 hertz (Hz), except that b. For group A inspection, the test voltage shall be applied for 5 seconds. For following the endurance tests t
43、he test voltage shall be 600 volts, rms, 60 Hz. qualification and group C inspection, the test voltage shall be applied for 1 minute. c. In each switch position, the test voltage shall be applied between open circuit contacts and between closed contacts and noncurrent carrying parts. d. The test sha
44、ll apply to stationary and movable control and switching contacts only. e. For enclosed switches, the test voltage shall be applied at the ships wiring connector receptacles (see figure 2). NOTE Dielectric withstanding voltage shall not be applied to circuitry which includes components which would n
45、ormally be damaged by the test voltage (that is, control circuit module, transient suppression diode). 4.8.7 Insulation resistance. Switch assembly shall be tested in accordance with method 302 of MIL-STD-202. The following details shall apply: a. Test condition B shall be used. b. In each switch po
46、sition, the test voltage shall be applied between open circuit contacts, and between closed contacts and noncurrent carrying parts. c. For group B tests, the test voltages shall be applied for 15 seconds. For qualification and group C inspection, the test voltage shall be applied for 1 minute. NOTE
47、The insulation resistance test voltage shall not be applied to circuitry which includes components which would normally be damaged by the test voltage (that is, control circuit module, transient suppression diode). 20 Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
48、se from IHS-,-,-MIL-S-24187E 59 m 9999906 0473854 2 m . 4.8.8 Contact resistance. Switch assemblies shall be tested in accordance with method 307 of MIGSTD-202. Measurements shall be taken at the crimp portion of the contacts in the switch contact module connector plug (see figure 2). The following
49、details shall apply: a. b. C. d. e. Method of connection - Copper leads, size 16 American Wire Gauge (AWG) for switches rated over 4 amperes and size 20 AWG or switches rated at 4 amperes or less, shall be crimped to connector contacts; the contacts inserted into a connector plug and fastened to the switch. Test load shall be as shown on the applicable specification sheet. For group A inspection, any load from 1 ampere to the maximum rate
