Unit 36 Flash Cards

Frage	Antworten
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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