MIL-DTL-24347B
STANDARDS
DEPARTMENT OF DEFENSE
MIL-STD-167/1
- Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and
Type II - Internally Excited).
- Requirements for the Control of Electromagnetic Interference
MIL-STD-461
Characteristics of Subsystems and Equipment.
MIL-STD-810
- Environmental Test Methods and Engineering Guidelines.
MIL-STD-1399/300
- Interface Standard of Shipboard Systems, Electric Power, Alternating Current.
(Metric).
HANDBOOKS
- Designing and Developing Maintainable Products and Systems, Volume I
MIL-HDBK-470
and Volume II.
MIL-HDBK-5961
- List of Standard Semiconductor Devices.
MIL-HDBK-781
- Reliability Test Methods, Plans, and Environments for Engineering
Development, Qualification, and Production.
(Unless otherwise indicated, copies of the above specifications, standards, and handbooks are available from the
Document Automation and Production Service, Building 4D (DPM-DODSSP), 700 Robbins Avenue, Philadelphia, PA
19111-5094.)
2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited
herein, the 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 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.4) in
accordance with 4.2.
3.2 General requirements. The enclosure and hardware material shall be of corrosion resistance material. The
monitor fabricated of static components, shall be in accordance with MIL-E-917, and the requirements of this
specification except as otherwise specified in the contract or order. If any requirement specified herein conflicts with
the requirements of MIL-E-917, the requirements of this specification shall govern.
3.2.1 Painting. 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. One coat of gray
enamel or epoxy shall be applied to the outside of the enclosure. Touching-up will be permitted for marks or
scratches due to factory handling. Powder coat which meets the color requirement is permissible.
3.3 Definitions. Definitions shall be as specified in MIL-STD-1399/300.
3.4 Performance. The single phase monitor shall perform the functions specified herein when connected in either
a single or three phase main power circuit of either 115 or 440 normal voltage and either a 60 or 400 Hz normal
frequency. The monitor shall operate within the specified limits when the voltage is reduced to 85 percent of normal
or raised to 10 percent above normal. The operating frequency range shall be plus or minus 5 percent of normal. A
typical monitor external wiring diagram is shown on figure 1. The monitor shall receive its voltage from the load side
connections of the disconnect device. Under the above conditions, the monitor shall permit the load disconnect to
close and stay latched if a load of 1-1/2 amperes (plus or minus 15 percent) exists. When the load current is reduced
below 1-1/2 amperes (plus or minus 15 percent), the monitor shall actuate its normally open single contact static
device to close and cause the disconnect device to open. Upon receipt of a signal, the contact shall have a delay
adjustable from 5 seconds to 30 seconds before it operates. If current goes above 1-1/2 amperes before the set
delay time, the monitor shall reset.
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