BS EN 4838-001:2018

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Aerospace series. Arc Fault Circuit breakers, single-pole, 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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Description

This European Standard specifies the single-pole temperature compensated arc fault circuit breakers with or 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 arc fault circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282.

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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
8	5.2 Design 5.2.1 Insulating box 5.2.2 Free release mechanism 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
9	5.2.8 Protection against non-release 5.2.9 Safety and reliability 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
17	7.4 Arc fault detection tests
18	8 Qualification tests 8.1 Sampling
22	8.2 Material tests 8.3 Periodic checks for qualification maintenance 9 Quality assurance 10 Marking 11 Delivery conditions 12 Packaging 13 Storage 13.1 Definition 13.2 Storage conditions
23	13.3 Storage duration

Additional information

Status	Definitive
Pages	24
Publication Date	2018-08-14
ISBN	978 0 580 51080 9
Standard Number	BS EN 4838-001:2018
Title	Aerospace series. Arc Fault Circuit breakers, single-pole, temperature compensated, rated current 3 A to 25 A. 115 V a.c. 400 Hz Constant Frequency – Technical specification
Identical National Standard Of	EN 4838-001:2018
Descriptors	Torque, Force, Environment (working), Vibration testing, Voltage fluctuations, Rated voltage, Short-circuit currents, Mechanical properties of materials, Aircraft components, Electrical resistance, Performance, Acceleration, Rated current, Circuit-breakers, Electrical protection equipment, Electrical insulation, Temperature, Tripping mechanisms (circuit-breakers), Height, Short-circuit current tests, Electrical testing, Environmental testing, Mechanical testing, Single, Dielectric strength, Overload (electric), Switchgear, Life (durability)
Publisher	BSI
Committee	ACE/6
ICS Codes	49.060 - Aerospace electric equipment and systems

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BS EN 4838-001:2018

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