{"id":457519,"date":"2024-10-20T09:51:44","date_gmt":"2024-10-20T09:51:44","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-3774-0042024\/"},"modified":"2024-10-26T18:19:31","modified_gmt":"2024-10-26T18:19:31","slug":"bs-en-3774-0042024","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-3774-0042024\/","title":{"rendered":"BS EN 3774-004:2024"},"content":{"rendered":"
This document specifies the characteristics of three-pole circuit breakers, temperature compensated with a rated current from 1 A to 25 A, used in aircraft on-board circuits at a temperature between \u221255 \u00b0C and 125 \u00b0C for ratings \u2264 15 A and \u221255 \u00b0C to 90 \u00b0C for ratings > 15 A and at an altitude of 22 000 m max. These circuit breakers are operated by a push-pull type single pushbutton (actuator), with delayed action \u201ctrip-free\u201d tripping. They will continue to function up to the short-circuit current.<\/p>\n
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2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
6<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
7<\/td>\n | 4 Dimensions and mass 4.1 Dimensional characteristics <\/td>\n<\/tr>\n | ||||||
8<\/td>\n | 4.2 Electrical diagram 4.3 Mass 4.4 Panel mounting <\/td>\n<\/tr>\n | ||||||
9<\/td>\n | 5 Characteristics 5.1 Material, surface treatment 5.2 Mechanical characteristics 5.2.1 Fasteners 5.2.2 Recommended tightening torque of attaching nut for installation 5.2.3 Recommended tightening torque of connection hardware for installation 5.2.4 Resistance to vibrations 5.2.4.1 Combined test: ambient temperature at 70 \u00b0C and vibrations 5.2.4.2 Combined test: ambient temperature at 85 \u00b0C, altitude and vibrations 5.2.5 Resistance to shocks 5.2.6 Mechanical endurance 5.3 Environment characteristics 5.3.1 Humidity 5.3.2 Corrosion 5.3.3 Contaminating liquids <\/td>\n<\/tr>\n | ||||||
10<\/td>\n | 5.3.4 Overvoltage caused by lightning 5.4 Electrical characteristics 5.4.1 Nominal voltage of operational circuits 5.4.2 Voltage drop at \u0399n and low current 5.4.3 Minimum and maximum tripping thresholds <\/td>\n<\/tr>\n | ||||||
11<\/td>\n | 5.4.4 Overload trip 5.4.5 Short-circuit values <\/td>\n<\/tr>\n | ||||||
12<\/td>\n | 5.4.6 No-load and load endurance 5.4.7 Dielectric rigidity 5.4.8 Insulation resistance <\/td>\n<\/tr>\n | ||||||
13<\/td>\n | 6 Designation 7 Rated current code 8 Delivery codes <\/td>\n<\/tr>\n | ||||||
14<\/td>\n | 9 Marking 10 Technical specification <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Aerospace series. Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A – UNC thread terminals. Product standard<\/b><\/p>\n |