Models for Design Electrical Calculations for Industrial Plants 1st Edition by Robert Henry Pe 1351380577 9781351380577

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ISBN-10 :  1351380577 

ISBN-13 :  9781351380577

Author:  Robert E. Henry Pe 

This book instructs the reader on how to size a network’s equipment and address requirements for fast-transient loads (kiloampere loads that last for several minutes). It explores specific calculations used to design equipment for plants. The chapters discuss economic design methods and dynamic-load requirements for electrical equipment. New motor thermal models are developed and power-cable thermal models are also covered. Furthermore, it presents universal plant-load breakdown.

Models for Design: Electrical Calculations for Industrial Plants 1st Table of contents:

1. Introduction
Fun Test
Questions
Answers
Section I Plant Equipment
2. Using an Uninterruptible Power Supply to Feed a Variable-Speed Drive
Introduction
Variable-Frequency Drives
Uninterruptible Power Supplies
Harmonic Distortion
Torque
Rotating Inertia
Starting a Fan
Starting Ramp Time
Mechanical Resonance
Response Time of a UPS with a Drive’s Load
Fan Start Time and Torque
Motor Efficiency Requirements
An Example
Normal Operation
Time Where Load Exceeds Steady Torque
Setting the Drive’s Torque Limit in the Drive’s Firmware
Sizing the UPS for Its Load
Sizing the UPS Battery
Light Loads on Large Motors
3. Storage Batteries
The DC System
Valve-Regulated Lead–Acid Battery
Battery Selection
Battery Heat Flow
The Battery
The Stack
Heat Flow Analysis of the Stack
Exponential Temperature Response of the Stack
Battery Specific Heat
Heat Flow Analysis of the Stack in the Cabinet
A Different Use of This Battery
Charging the Battery and Thermal Runaway
Section II One-Line Designs
4. The Largest Demand for 13.8 kV Switchgear
Large-Motor Fault Current Contribution
Large Motors
Small Motor Contribution
Medium-Voltage Motor Control Centers
Maximum Plant Motor Load
Fault Analysis of the Maximum Plant
Conclusions
Exceptions
5. The Minor Influence of the Grid Thevenin Impedance on Plant Faults
6. Use of a Three-Winding Step-Up Transformer
Introduction
The Small Off-Power Generating Unit
The Small-Unit Auxiliary Load
The Transformer
Specifying the Transformer
Fault Current in the Auxiliary Distribution
Transformer Impedance Values
Calculating Wye Values
Values on the Transformer’s Nameplate
Fault-Current Analysis for the Protective Relay System
Larger Units
Section III Fast Transient Calculations
7. Analysis of Power Cables Conducting Fast Transient Loads
Cables in Air
Cables Installed in Conduit
Underground Feeders
Calculation of Time Constants
Cooldown
Simple Fast Transient Response
Power Cables Rated 600 V
Sizing Power Feeders Using the Tables
Cable Assemblies
8. Sizing Power Cables for Fast Transient Loads
Developing the Summary Tables 7.2 and 7.5
Low Voltage
Fast Transient Loading of the Motor
Fast Transient Loading of the Motor’s Feeder
Fast Transient Loading of Variable-Speed Drives
Summary
9. Introduction to Motor Fast Transient Loading
A Mining Company Project
General Response
10. Fast Transient Motor Analysis
Background
The Circuit Used for Analysis
Varying Reactance
Torque
Summary
11. Calculation of the Motor’s Temperatures
Thermal Model
Motor Thermal Capacitances
Temperature Rise Rating
Evaluating Thermal Circuit Elements
Operating Time at 1300 lb-ft of Torque
Cooldown to 200 Hp Operation: Extended Cycle
The More Severe Operating Cycle
Afterthought on the Thermal Resistances
Summary
12. Motor Conclusions
Frame Size
Purchasing Requirements
13. Line Design
The Load
Cable Ampacity and Size
Cable Temperature
Voltage Drop
Line Length
Auxiliary Power Feeder Size and Signal Cable
Alternative Conductor Sizes
Transmission at 2400 V
14. Comparisons of Line Alternative Costs
Cable Prices for 600 V Lines
Motor Feeder
Aux Power Feeder
Signals Cable
Galvanized Steel Messenger Cable and Spiral Wrapping Tape
Alternative 2400 V Line
Summary
15. Preliminary Cost Estimate
The Process Plant Cost
The Line Cost
Skid Costs
Summary
Costs per Foot

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Tags: Models, Design, Electrical Calculations, Industrial Plants, Robert Henry Pe