calculation of motor power for feeder amp screen

Power & Amps Calculation - Construction Monkey

Power and Ampacity Calculation. What do You Want to Calculate: Power Amps. Power. VA. Amps. Voltage. AC DC Single Phase: Three Phase.

Calculation of Drag chain RPM & Motor power

Bit of a Drag. 'Drag chain' could refer to a reclaimer; scraper chain conveyor; apron feeder etc. Each has its own particular drag force. Selected chain speed determines rpm and motor power is chain speed x drag but usually factored according to the drive duty. Maybe it doesn't help much: but neither does the question.

Calculating Conveyor Power for Bulk Handling | Rulmeca Corp

The program not only determines required power, but also displays all Motorized Pulleys available (for 60 Hz power supply), and plots dimensional information to scale. This tutorial is for bulk handling conveyor belt engineers and technicians challenged with designing a new conveyor system and conveyor operators confronted with belt tension ...

400 amp feeder calculation | Mike Holt's Forum

Re: 400 amp feeder calculation 500 mcm for all of the conductors, although remember when you have a bunch of florescent lights and computer equipment you have to watch out for the harmonic balance. Most of the time it calls for a 200% neutral or a dedicated neutral for each individual branch circuit.

How to Calculate Load Torque & Motor Power

The sum of resistances = tractive pull. The tractive pull multiplied by the drive pulley radius will give you the load torque. There is no short cut for deciding the load torque. This cannot be calculated from motor side. 5) Having decided the load torque, you can decide the required power at motor shaft, available motor size, gear ratio and so on.

Motor Calculations, Part 2: Feeders - Mike Holt

Motor calculations are different from other calculations. With motor feeders, you are calculating for protection from short circuits and ground faults, only-not overload. That seemed like a lot of steps, but by proceeding methodically you will arrive at the correct answer. See Example D8 in Annex D of the NEC, for more detail.

Electrical Feeder Calculation - Construction Monkey

Construction Monkey calculator that determines an electrical feeder based on load size as well as other variables. It also calculates the voltage drop and maximum distances of the feeders.

Motor Calculations (Refer to pg. 49) see one-line diagram.

Example - You have a motor with a FLC of 10 amps and a heat load of 15 amps on a feeder. Largest motor = 10 amps x 125% = 12.5 amps plus the additional heat load of 15 amps = 27.5 amps Even though the heat load FLC was greater than that of the motor, we still added the 25% to the largest motor!

Code Calculations | EC&M

Industrial Calculations: Feeder Loads -- Part 3 Now it's time to use what we've learned in this column over the last several issues and calculate the service load for feeders No. 1 through No. 6 in our hypothetical industrial plant. See the April and May 2001 articles for amperage values of feeders No. 1 through No. 6. Refer to the Figure for a one-line diagram of the electrical …

Load Calculations for Feeder and Service Neutral ...

As per NEC section 220.61(B)(2), Where the calculated neutral current is more than 200 amperes, another reduction is permitted. Where the feeder or service is supplied from a three-wire DC or single-phase AC system; a four-wire, three-phase, three-wire, two-phase system; or a five-wire, two-phase system, it is permissible to apply a demand factor of 70 percent to that portion of the unbalanced ...

Motor Calculations Part 2: Feeders | EC&M

Motor Calculations Part 2: Feeders. May 1, 2004. What's the correct way to size motor feeders and related overcurrent protection? Mike Holt.

Electric Motor Calculator - Engineering ToolBox

Calculate 3 Phase Apparent Power (kVA) RLA - "Running Load Amps" - current drawn during normal operation of electric motor. FLA - "Full Load Amps" - amount of current drawn when full-load torque and horsepower is reached for the motor. FLA is usually determined in laboratory tests. Note! - in the calculator above FLA is RLA + 25%. 1 hp = 0.745 kW.

Determining Electric Motor Load and Efficiency

Figure 3 Relationships Between Power, Current, Power Factor and Motor Load Example: Input Power Calculation An existing motor is identified as a 40-hp, 1800 rpm unit with an open drip-proof enclosure. The motor is 12-years old and has not been rewound. The electrician makes the following measurements: Measured Values: V ab = 467V I a = 36 amps ...

Appendix 9C: Design Calculations for Electrical Design

requirements, the motor efficiency and power factor must be accounted for. In general, for preliminary or rough load calculations, assume: 1 kVA of electrical input power for 1 hp of motor. Example 9C-1 Motors Condition: A motor control center with a total connected horsepower of 337 hp can be assumed to require 337 kVA of input power.

Motor feeder calculation | Mike Holt's Forum

Each motor is VFD with a nameplate input of 156 amps. Each VFD has a 200 amp inverse time breaker in the MCC. Method 1: 124 amps + 200 amps = 324 + 53 = 377 (400 amp breaker/bus). Method 2: 156 amps + 200 amps = 356 + 53 = 409 (600 amp …

Motor FLA Calculator - Good Calculators

Enter the motor power rating and select the appropriate unit (HP or kW) Enter the power factor and efficiency of the motor; Click on the "Calculate" button to see the results. Note: Please note that this calculator is provided for information purposes only. Typically, the FLA value is shown on the motor …