TABLE OF CONTENTS H.Wayne Beaty
Editor, Standard Handbook for Electrical Engineers; Former
Managing Editor, Electric Light & Power, Utility Automation,
Power Delivery; Senior Member, Institute of Electrical and
Electronics Engineers
The units of the quantities most commonly used in electrical engineering (volts, amperes, watts, ohms, etc.) are those of the metric system. They are embodied in the International System of Units ( Syst me International d Unit s, abbreviated SI). The SI units are used throughout this handbook, in accordance with the established practice of electrical engineering publications throughout the world. Other units, notably the cgs (centimeter-gram-second) units, may be used in citations in the earlier literature. The cgs electrical units are listed in Table 1 9 with conversion factors to the SI units.
| Quantity | Name | Symbol | Correspondence with SI unit |
|---|---|---|---|
| Electromagnetic system | |||
| Current | abampere | abA | =10 amperes (exactly) |
| Voltage | abvolt | abV | =10 8 volt (exactly) |
| Capacitance | abfarad | abF | =10 9 farads (exactly) |
| Inductance | abhenry | abH | =10 ?9 henry (exactly) |
| Resistance | abohm | ab ? | =10 ?9 ohm (exactly) |
| Magnetic flux | maxwell | Mx | =10 ?8 weber-(exactly) |
| Magnetic field strength | oersted | Oe | =79.577 4 amperes per meter |
| Magnetic flux density | gauss | G | =10 ?4 tesla (exactly) |
| Magnetomotive force | gilbert | Gb | =0.795 774 ampere |
| Electrostatic system | |||
| Current | statampere | statA | =3.335 641 10 ?10 ampere |
| Voltage | statvolt | statV | =299.792 46 volts |
| Capacitance | statfarad | statF | =1.112 650 10 12 farad |
| Inductance | stathenry | statH | =8.987 554 10 11 henrys |
| Resistance | statohm | stat ? | =8.987 554 10 |
