2561119
Description
Flashcards by giannini.chambers, updated more than 1 year ago
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Created by giannini.chambers
over 9 years ago
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| Question | Answer |
| Illuminance below a light source | I/d² |
| Illuminance at an angle from a light source | cos(θ) x I _____________ d² |
| Ohm's Law | V=IxR |
| Resistive Power | P=VxI P=I²R P=V²/R |
| 3 phase True Power | P=√3 x VL x IL x cos(θ) |
| 3 phase apparent power | S=√3 x VL x IL |
| Symbol for Inductance | L |
| Symbol for Capacitance | C |
| Symbol for Resistance | R |
| Symbol for Inductive Reactance | XL |
| Symbol for Capacitive Reactance | XC |
| Equation for Inductive Reactance | 2πfL |
| Equation for Capacitive Reactance | 1/(2πfC) |
| Equation for Impedance | Z=√(R²+(Xl-Xc)²) |
| The names of 8 types of protective device | FUSE MCB MCCB RCBO RCD ACB VCB OCB |
| Typical Generation Voltage | 22/25kV |
| Typical Transmission Voltages | 132kV/275kV/400kV |
| Typical Distribution Voltages | 33kV/11kV |
| Equation for Star Voltage | VL=VP x √3 |
| Equation for Star Current | IL=Ip |
| Equation for Delta Voltage | VL=Vp |
| Equation for Delta Current | IL=Ip x √3 |
| What value is the SI prefix µ | x10^-6 |
| What value is the SI prefix m | x10^-3 |
| What value is the SI prefix k | x10^3 |
| What value is the SI prefix M | x10^6 |
| What value is the SI prefix n | x10^-9 |
| What value is the SI prefix p | x10^-12 |
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