BS 2G 134:1970

Foreword
Specification
1. General
1.1 Scope
1.2 Design and construction
1.3 Standard voltage
1.4 Cooling arrangements
1.5 Mounting and drive
1.6 Electrical connection
1.7 Radio interference suppression
1.8 Rating and overload requirements
1.9 Efficiency
1.10 Excitation
1.11 Overspeed
1.12 Environmental conditions
1.13 Declaration of performance
1.14 Nameplate
2. Tests
2.1 General
2.2 Test conditions
2.3 Type tests
2.3.1 Weight, centre of gravity and rotor inertia
2.3.2 Initial check
2.3.3 Cold resistance of windings
2.3.4 Commutation
2.3.5 Magnetization characteristics
2.3.6 Ripple voltage
2.3.7 Brush performance at altitude
2.3.8 Temperature
2.3.9 Temperature (shortened standard test)
2.3.10 Insulation resistance
2.3.11 Overspeed
2.3.12 Containment
2.3.13 Endurance, overload and radio interference
       suppression
2.3.14 Vibration
2.3.15 Acceleration
2.3.16 Temperature-pressure
2.3.17 Mould growth
2.3.18 Compass interference
2.3.19 Waterproofness
2.3.20 Salt corrosion
2.3.21 Dust and sand
2.3.22 Fluid contamination
2.4 Production routine tests
2.4.1 Component check
2.4.2 Resistance of windings
2.4.3 Brush bedding and adjustment
2.4.4 Temperature
2.4.5 Overspeed
2.4.6 Loading
2.4.7 Insulation
2.5 Production quality tests
2.5.1 Selection of samples
2.5.2 Testing
Appendices
A. Salt corrosion test
B. Dust and sand test
C. Fluid contamination test
Figure
1. Measuring device for dust and sand test

Specifies generators for aircraft d.c. power supply. The design aim is to achieve 3,000 (aircraft) hours operation before maintenance is necessary. Includes salt corrosion test, dust and sand test and fluid contamination test. Illustrates measuring device for dust and sand test.

This British Standard applies to generators for aircraft d.c. power supply. It is intended to be read in conjunction with the relevant parts of BS 2G 100 or BS 3G 100, and BS G 102.