UNE-EN 3774-001:2000

Foreword
1 Scope
2 Normative reference
3 Definitions
4 Description
5 Required characteristics
6 Tests
   6.1 Mechanical tests
   6.2 Environmental tests
   6.3 Electrical tests
7 Quality assurance
8 Designation
9 Marking
Table 1 - Rated currents
Table 2 - Rated voltages
Table 3 - Mechanical characteristics
Table 4 - Environmental conditions
Table 5 - Electrical characteristics
Table 6 - Voltage drop
Table 7 - Minimum and maximum tripping points
Table 8 - Overload tripping times
Table 9 - Short-circuit performance
Table 10 - Service life at no load and at rated current
Table 11 - Service life under overload trip conditions
Table 12 - Overload test with mechanism locked

This standard defines the required characteristics for three-pole, temperature compensated circuit breakers, rated currents from 2A to 25A, switching capacity 65In for use in aircraft electrical systems. Their operating temperatures are between -55degreeC and 125degreeC for rated currents equal or lower than 15A and between -55degreeC and 90degreeC for rated currents higher than 15A at a maximum altitude of Z = 22000mm. It shall be used together with EN2350. These circuit breakers are intended for use in aircraft with elect rical supplies in accordance with EN2282.