1. What is the most critical node for a symmetric three-phase fault? 2. If the reference voltage of the system is 10 KV Line to neutral, what is the current short-circuit for a fault in node 2? ( 3. How much would the voltage drop at node 3 for the fault described in point 2? (

1. What is the most critical node for a symmetric three-phase fault? 2. If the reference voltage of the system is 10 KV Line to neutral, what is the current short-circuit for a fault in node 2? ( 3. How much would the voltage drop at node 3 for the fault described in point 2? (

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Protection System

A system that protects electrical systems from faults by isolating the problematic part from the remainder of the system, preventing power from being cut from healthy elements, improving system dependability and efficiency is the protection system. Protection devices are the equipment that are utilized to implement the protection system.

Predictive Maintenance System

Predictive maintenance technologies are designed to assist in determining the state of in-service equipment so that maintenance can be scheduled. Predictive maintenance is the application of information; proactive maintenance approaches examine the condition of equipment and anticipate when it should maintain. The purpose of predictive maintenance is to forecast when equipment will fail (depending on a variety of parameters), then prevent the failure through routine and corrective maintenance.Condition monitoring is the continual monitoring of machines during process conditions to maintain optimal machine use, which is necessary for predictive maintenance. There are three types of condition monitoring: online, periodic, and remote. Finally, remote condition monitoring allows the equipment observed from a small place and data supplied for analysis.

Preventive Maintenance System

To maintain the equipment and materials on a regular basis in order to maintain those running conditions and reduce unnecessary shutdowns due to unexpected equipment failure is called Preventive Maintenance (PM).

Question

FROULLIVU.
shown below, say:
S: Knowing the ZBUS matrix of a three-node system,
1. What is the most critical node for a symmetric three-phase fault? (
2. If the reference voltage of the system is 10 KV Line to neutral, what is the current
short-circuit for a fault in node 2? (
3. How much would the voltage drop at node 3 for the fault described in point 2? (
4. If only one electric motor with reactance Xm is connected to node 3,
what is its current during the fault? (1

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Step 1: Introduction

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Step 2: Part (1) - Critical node

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Step 3: Part (2) - Short-circuit fault current in node 2

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Step 4: Part (3) - Voltage drop at node 3 due to fault

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