DI-SESS-82287

Overload and Fault Analysis Report

Documents the ability of an electrical power system to safely operate in the presence of overloads and faults, substantiating an airworthiness certification for the system.

Approval DateAugust 15, 2019

AMSC NumberN10071

Preparing ActivityAS

Project NumberSESS-2019-037

OPR—

DTIC Applicable—

GIDEP Applicable—

LimitationNone

Applicable Forms—

Approval Limitation—

Form Version—

DID Formatfree_text

963C CompliantYes

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Supersedes

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Description & Purpose

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Application & Interrelationship

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Use & Relationship

The Overload and Fault Analysis Report documents the ability of an electrical power system to safely operate in the presence of overloads and faults. The data will be used to substantiate an airworthiness certification for the system.

This Data Item Description (DID) contains the format, content, and intended use information for the Overload and Fault Analysis Report resulting from fault analysis tasking described by the contract statement of work.

Preparation Instructions

1Reference DocumentsNone

2FormatContractor format acceptable

3ContentThe report shall include the following:

3.1All unique overload and fault conditionsof the electrical power system

3.2An electrical bond impedance analysisof the electrical power system and utilization equipment, including:

3.2.1Bond impedances needed to meet grounding and bonding requirements

3.2.2Predicted bond impedances for each piece of utilization equipment

3.2.3Current carrying capacity of conductors and insulation, including system structural components

3.3A circuit isolation and fault analysisof the electrical power system, including:

3.3.1The ability of the system to isolate faultsfrom the sources powering them

3.3.2The location of each simulated faultand the physical location and electrical connections of the element that interrupted the fault

3.3.3The ability of the system to operateduring and after clearing faults, including

3.3.3.1The mission impact of each cleared fault

3.3.3.2The mission impact of the faults that cannot be cleared

3.3.4All damage prevention schemes used in the system

3.3.4.1Circuit protection equipment

3.3.4.2Methods of power regulation and control

3.3.4.3The ability of each scheme to safely interrupt faultsand sustain overloads without creating a fault

3.3.4.4The response time of damage prevention schemes to overloads and faults

3.3.5The ability of the system to prevent and isolate arc faults

3.3.5.1Steady state voltages

3.3.5.2Transient voltages

3.3.6The methods used to prevent the connectionof each source to any other source

References

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