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BS ISO 20949:2018

BS ISO 20949:2018

$142.49

Aircraft. Smart contactor. General requirements

Published By Publication Date Number of Pages
BSI 2018 32
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This document specifies the definitions, titles of design and general requirements and test methods to determine the performance of smart contactors for use in aircraft electrical power systems. The smart contactor consists of a switching driving circuit and a power switch for protection, action on control signals, and providing status information.

PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
11 4 General requirements
4.1 Detail specification sheets
12 4.2 Materials
4.3 Construction
4.4 Terminals
4.4.1 Main terminals
13 4.4.2 Auxiliary terminals
4.5 Enclosures
4.5.1 General
14 4.5.2 Open enclosures
4.5.3 Enclosed enclosures (ventilated explosion-proof)
4.5.4 Sealed (other than hermetically) enclosures
4.5.5 Hermetically sealed enclosures
4.5.6 Grounding of enclosures
4.6 Installation clearances
4.7 Terminal marking
4.8 Terminal covers and barriers
15 4.9 Mounting
5 Design characteristics
5.1 General
16 5.2 Control signal
5.3 Status signals for smart contactors
5.4 Fail-safe characteristics
6 Operating characteristics
6.1 General operating characteristics
6.2 Timing sequence
17 6.3 Operating voltage
6.3.1 General
6.3.2 Pickup voltage
6.3.3 Dropout voltage
6.4 Electrical characteristics
6.4.1 General
18 6.4.2 Contact voltage drop
6.4.3 Quiescent power dissipation
6.4.4 Control signals
19 6.5 Contact bounce, operating and release time
6.6 Dielectric strength
6.7 Insulation resistance
20 6.8 Overload characteristics
6.8.1 General
6.8.2 Trip characteristics with the overload condition
6.8.3 Circuit breaker compatibility
6.9 Ground Fault Interrupt characteristics
6.10 Trip-free characteristics
6.11 Life
21 7 Environmental conditions and test procedures
8 Qualification Tests
8.1 General
22 8.2 Visual and mechanical examination
8.3 Timing sequence
8.3.1 Turn-off time
23 8.3.2 Turn-on time
8.4 Operating voltage
8.4.1 General
24 8.4.2 Pickup voltage
8.4.3 Dropout voltage
8.5 Electrical characteristics
8.5.1 General
8.5.2 Contact voltage drop
25 8.5.3 Quiescent power dissipation
8.5.4 Control signals
27 8.6 Contact bounce, operating and release times
8.6.1 General
28 8.7 Dielectric withstanding voltage
8.8 Insulation resistance
29 8.9 Overloads
8.9.1 Trip characteristics with the overload condition
8.9.2 Circuit breaker compatibility
8.10 Ground Fault Interrupt characteristics
8.11 Trip-free characteristics
8.12 Life
30 8.13 Terminal strength
8.14 Seal
31 Bibliography

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BS ISO 20949:2018
$142.49