Electrical Power Systems Technology

190 Electrical Power Systems Technology The resulting DC output voltage of the three-phase, full-wave rectifier circuit is shown ...

Direct Current Power Systems 191 DC FILTERING METHODS The pulsating direct current produced by both single-phase and three- phas ...

192 Electrical Power Systems Technology The output of a rectifier has a DC value and an AC ripple value, as shown in Figure 7-27 ...

Direct Current Power Systems 193 Vr(rms) % ripple = ——— = 100 Vdc Sample Problem: Given: a power supply has an AC input of 24 vo ...

194 Electrical Power Systems Technology The ideal filtered DC voltage would be one with no AC ripple and a value equal to the pe ...

Direct Current Power Systems 195 Solution: Vr(p–p) Vr(rms) = ——— 2 × √ 3 1.2 V = ——— 3.46 Vr(rms) = 0.34 V Figure 7-28. Filter c ...

196 Electrical Power Systems Technology We can also express the amount of ripple of a 60-Hz full-wave filter- capacitor circuit ...

Direct Current Power Systems 197 The average DC voltage output can be expressed as: 4.16Idc Vdc = Vmax – ——— C Sample Problem: G ...

198 Electrical Power Systems Technology 2.4 × 950 mA = —————— 0.5 V C = 4550 uF It should be pointed out that as the value of C ...

Direct Current Power Systems 199 sistance, but its AC impedance is much larger. It therefore passes DC and blocks the AC compone ...

200 Electrical Power Systems Technology In an ideally regulated circuit, VNL would equal VFL. In all types of power supplies tha ...

Direct Current Power Systems 201 ly, if the voltage across the load increases, the rise in emitter voltage makes the base less p ...

202 Electrical Power Systems Technology transistors causes an increase in the voltage drop across resistor R1. This increased vo ...

203 UNIT III Electrical Power Distribution Systems Once electrical power has been produced, it must be distributed to the locati ...

204 Electrical Power Systems Technology Calculate turns ratio, voltage ratio, current ratio, and the power and efficiency of tr ...

Unit Objectives 205 Branch Circuits Safety Switches Distribution Panelboards Low-Voltage Switchgear Service Entrance Explain th ...

206 Electrical Power Systems Technology Wire Connectors Plastic Conduit and Enclosures Power Outlet Design International Power S ...

207 Chapter 8 Power Distribution Fundamentals Power distribution systems are a very important part of electrical pow- er systems ...

208 Electrical Power Systems Technology Secondary Winding Transformer Core Closed-Core Transformer Construction Shell-Core Trans ...

Electrical Power Distribution Systems 209 may say that the overall electrical power system delivers power from the source to the ...