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BS EN 4839-001:2018

BS EN 4839-001:2018

$142.49

Aerospace series. Arc fault circuit breakers, three-poles, temperature compensated, rated current 3 A to 25 A – 115 V a.c. 400 Hz constant frequency – Technical specification

Published By Publication Date Number of Pages
BSI 2018 24
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This European Standard specifies the three-poles temperature compensated arc fault circuit breakers without signal contacts, rated from 3 A to 25 A and used in aircraft on-board circuits. In any operating state a “trip-free” tripping is ensured. These Items are designed to protect aircraft wiring system from circuit overload and arc faults. It describes specific environmental, electrical and mechanical characteristics and the stringency of tests to be applied according to test methods of EN 3841-100.

If the design of the arc fault circuit breakers contains software or complex hardware, as a minimum, the software and hardware shall be developed in accordance with RTCA DO-178B or C, DAL C and RTCA DO‑254, DAL C, respectively.

These circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 1 Scope
2 Normative references
7 3 Terms and definitions
4 Description
5 Design
5.1 Materials
5.1.1 Metallic materials
5.1.2 Insulation materials
5.2 Design
5.2.1 Insulating box
5.2.2 Free release mechanism
8 5.2.3 Attachment
5.2.4 Electrical connection units
5.2.5 Control actuator
5.2.6 Rating inviolability
5.2.7 Clearances and creepage distances
5.2.8 Protection against non-release
5.2.9 Safety and reliability
9 6 Characteristics
6.1 General characteristics
6.2 Ratings
6.3 Nominal voltage of operational circuits
6.4 Dimensional characteristics
6.5 Recommended panel mounting
10 7 Tests
7.1 Mechanical tests
11 7.2 Environmental tests
16 7.3 Electrical tests
18 7.4 Arc fault detection tests
8 Qualification tests
8.1 Sampling
22 8.2 Material tests
8.3 Periodic checks for qualification maintenance
9 Quality assurance
23 Delivery conditions
11 Packaging
12 Storage
12.1 Definition
12.2 Storage conditions
12.3 Storage duration

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BS EN 4839-001:2018
$142.49