Electrical Load Calculation Pdf

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  1. Free Electrical Load Calculation Spreadsheet
  2. Residential Electrical Load Calculation Pdf
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Simplified Electrical Calculations for Sophisticated Results. AC Power - 3 Phase Power. Cooking equipment load. 1 MELs are produced by hard wired and “plug in” electrical devices. Instantaneous load calculation at different outdoor dry bulb temperatures,.

Cooling and Heating Load Calculation Principles, by Curtis Pedersen, Daniel Fisher, Richard Liesen, and myself. The Load Calculation Applications Manual, also sponsored by TC 4.1, builds on the past three, and some parts are taken directly from previous versions. New develop-ments in data and methods have led to numerous revisions.


Большой англо-русский и русско-английский словарь. 2001.

Смотреть что такое 'calculated load' в других словарях:

  • calculated load — skaičiuotinė apkrova statusas T sritis automatika atitikmenys: angl. assumed load; calculated load; specified load vok. rechnerische Belastung, f rus. расчётная нагрузка, f pranc. charge calculée, f … Automatikos terminų žodynas

  • ultimate calculated load — ribinė skaičiuotinė apkrova statusas T sritis automatika atitikmenys: angl. ultimate calculated load; ultimate design load vok. berechnete Grenzbelastung, f rus. предельная расчётная нагрузка, f pranc. charge limite calculée, f … Automatikos terminų žodynas

  • Load (computing) — In UNIX computing, the system load is a measure of the amount of work that a computer system is doing. The load average is the average system load over a period of time. It is conventionally given as three numbers that represent the system load… … Wikipedia

  • Load profile — In electrical engineering, a load profile is a graph of the variation in the electrical load versus time. A load profile will vary according to customer type (typical examples include residential, commercial and industrial), temperature and… … Wikipedia

  • load — loadless, adj. /lohd/, n. 1. anything put in or on something for conveyance or transportation; freight; cargo: The truck carried a load of watermelons. 2. the quantity that can be or usually is carried at one time, as in a cart. 3. this quantity… … Universalium

  • Load Ratio Share — Ratio of a transmission customer s network load to the provider s total load calculated on a rolling twelve month basis … Energy terms

  • assumed load — skaičiuotinė apkrova statusas T sritis automatika atitikmenys: angl. assumed load; calculated load; specified load vok. rechnerische Belastung, f rus. расчётная нагрузка, f pranc. charge calculée, f … Automatikos terminų žodynas

  • specified load — skaičiuotinė apkrova statusas T sritis automatika atitikmenys: angl. assumed load; calculated load; specified load vok. rechnerische Belastung, f rus. расчётная нагрузка, f pranc. charge calculée, f … Automatikos terminų žodynas

  • ultimate design load — ribinė skaičiuotinė apkrova statusas T sritis automatika atitikmenys: angl. ultimate calculated load; ultimate design load vok. berechnete Grenzbelastung, f rus. предельная расчётная нагрузка, f pranc. charge limite calculée, f … Automatikos terminų žodynas

  • Critical load — In the study of air pollution, a critical load is defined as ”A quantitative estimate of an exposure to one or more pollutants below which significant harmful effects on specified sensitive elements of the environment do not occur according to… … Wikipedia

  • Genetic load — In population genetics, genetic load or genetic burden is a measure of the cost of lost alleles due to selection (selectional load) or mutation (mutational load). It is a value in the range 0 < L < 1, where 0 represents no load. The concept … Wikipedia

Книги

  • Current Interruption Transients Calculation, David Peelo F.. Provides an original, detailed and practical description of current interruption transients, origins, and the circuits involved, and how they can be calculated Current Interruption Transients… ПодробнееКупить за 11707.11 рубэлектронная книга

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More Formulas

Download Formulas [ Word™ ][ PDF ]

Conversion Formulas

Area of Circle = (pi r^2)
Breakeven Dollars = Overhead Cost $/Gross Profit %
Busbar Ampacity AL = 700A Sq. in. and CU = 1000A Sq. in.
Centimeters = Inches x 2.54
Inch = 0.0254 Meters
Inch = 2.54 Centimeters
Inch = 25.4 Millimeters
Kilometer = 0.6213 Miles
Length of Coiled Wire = Diameter of Coil (average) x Number of Coils x (pi)
Lightning Distance in Miles = Seconds between flash and thunder/4.68
Meter = 39.37 Inches
Mile = 5280 ft, 1760 yards, 1609 meters, 1.609 km
Millimeter = 0.03937 Inch
Selling Price = Estimated Cost $/(1 - Gross Profit %)
Speed of Sound (Sea Level) = 1128 fps or 769 mph
Temp C = (Temp F - 32)/1.8
Temp F = (Temp C x 1.8) + 32
Yard = 0.9144 Meters


Electrical Formulas Based on 60 Hz

Capacitive Reactance (Xc) in Ohms = 1/(2(pi) f C)
Effective (RMS) AC Amperes = Peak Amperes x 0.707
Effective (RMS) AC Volts = Peak Volts x 0.707
Efficiency (percent) = Output/Input x 100
Efficiency = Output/Input
Horsepower = Output Watts/746
Inductive Reactance (XL in Ohms = 2(pi) f L
Input = Output/Efficiency
Neutral Current (Wye) =(sqrt{A^2+B^2+C^2-(AB+BC+AC)})
Output = Input x Efficiency
Peak AC Volts = Effective (RMS) AC Volts x (sqrt 2)
Peak Amperes = Effective (RMS) Amperes x (sqrt 2)
Power Factor (PF) = Watts/VA
VA (apparent power) = Volts x Ampere or Watts/Power Factor
VA 1-Phase = Volts x Amperes
VA 3-Phase = Volts x Amperes x (sqrt 3)
Watts (real power) Single-Phase = Volts x Amperes x Power Factor
Watts (real power) Three-Phase = Volts x Amperes x Power Factor x (sqrt 3)


Parallel Circuits

Note 1: Total resistance is always less than the smallest resistor
Note 1: RT = 1/(1/R1 + 1/R2 + 1/R3 +...)
Note 2: Total current is equal to the sum of the currents of all parallel resistors
Note 3: Total power is equal to the sum of power of all parallel resistors
Note 4: Voltage is the same across each of the parallel resistors


Series Circuits

Note 1: Total resistance is equal to the sum of all the resistors
Note 2: Current in the circuit remains the same through all the resistors
Note 3: Voltage source is equal to the sum of voltage drops of all resistors
Note 4: Power of the circuit is equal to the sum of the power of all resistors


Nec 220 load calculation worksheetTransformer Amperes

Secondary Amperes 1-Phase = VA/Volts
Secondary Amperes 3-Phase = VA/(Volts x (sqrt 3))
Secondary Available Fault 1-Phase = VA/(Volts x %impedance)
Secondary Available Fault 3-Phase = VA/(Volts x (sqrt 3) x %Impedance)
Delta 4-Wire: Line Amperes = Phase (one winding) Amperes x (sqrt 3)
Delta 4-Wire: Line Volts = Phase (one Winding) Volts
Delta 4-Wire: High-Leg Voltage (L-to-G) = Phase (one winding) Volts x 0.5 x (sqrt 3)
Wye: Line Volts = Phase (one winding) Volts x (sqrt 3)
Wye: Line Amperes = Phase (one winding) Amperes


Voltage Drop

VD (1-Phase) = 2KID/CM
VD (3-Phase) = (sqrt 3) KID/CM
CM (1-Phase) = 2KID/VD
CM (3-Phase) = (sqrt 3) KID/VD


Code Rules

Breaker/Fuse Ratings – 240.6(A)
Conductor Ampacity – 310.15 and Table 310.16
Equipment Grounding Conductor – 250.122
Grounding Electrode Conductor – 250.66
Motor Conductor Size – 430.22 (Single) 430.24 (Multiple)
Motor Short-Circuit Protection – 430.52
Transformer Overcurrent Protection – 450.3


Free Electrical Load Calculation Spreadsheet

Constants

Residential Electrical Load Calculation Pdf


(pi)(Pi) = (3.142 approximately)
(sqrt 2) = 1.414 (approximately)
(sqrt 3) = 1.732 (approximately)
f = Frequency
r = radius
d = diameter
C = Capacitance (farads)
L = Inductance (henrys)
CM = Circular Mils (Chapter 9, Table 8)
VD = Volts Drop
K75oC = (12.9 ohms CU) (21.2 ohms AL)
I = Amperes of load
D = Distance in ft one way

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