BS EN 3774-001:2014

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Aerospace series. Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A – Technical specification

Published By	Publication Date	Number of Pages
BSI	2014	24

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Description

This European Standard specifies the three-pole temperature compensated circuit breakers, rated from 1 A to 25 A used in aircraft on-board circuits. It describes specific environmental, electrical and mechanical characteristics and the stringency of tests to be applied according to test methods of EN 3841-100.

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

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PDF Pages	PDF Title
5	Foreword
6	1 Scope 2 Normative references 3 Terms and definitions 4 Description
7	5 Design 5.1 Materials 5.1.1 Metallic materials When bimetals are used, an eventual corrosion shall not affect the good operation of the circuit breaker. 5.1.2 Insulation materials 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
8	5.2.6 Rating inviolability 5.2.7 Clearances and creepage distances 5.2.8 Protection against non-release 6 Characteristics 6.1 General characteristics
9	6.2 Ratings 6.3 Nominal voltage of operational circuits 6.4 Dimensional characteristics 6.5 Recommended panel mounting dimensions 7 Tests 7.1 Mechanical tests
10	7.2 Environmental tests
15	7.3 Electrical tests
17	8 Qualification tests 8.1 Sampling
21	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
22	13.2 Storage conditions 13.3 Storage duration The storage duration under conditions defined in 13.2 shall be three years maximum.

Additional information

Status	Under Review
Pages	24
Publication Date	2014-10-31
ISBN	978 0 580 83453 0
Standard Number	BS EN 3774-001:2014
Title	Aerospace series. Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A – Technical specification
Identical National Standard Of	EN 3774-001:2014
Replaces	BS EN 3774-001:1999
Descriptors	Torque, Electrical insulation, Rated current, Mechanical testing, Aircraft components, Tensile strength, Force, Performance testing, Rated voltage, Tri-pole circuit-breakers, Tripping mechanisms (circuit-breakers), Loading, Making capacity, Compressive strength, Electrical resistance, Switchgear, Electrical protection equipment, Breaking capacity, Electrical testing, Circuit-breakers, Environmental testing
Publisher	BSI
Committee	ACE/6
ICS Codes	49.060 - Aerospace electric equipment and systems

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BS EN 3774-001:2014

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