cable size calculation for star delta motor

The setting must be x0.58 FLC (line current). Non-Inductive or Slightly Inductive ,Resistive Load, Switching of Electrical Incandescent Lamp, Slightly Inductive Load in Household or same type load, Hermetic refrigerant Compressor Motor with Manual O/L Reset, Hermetic refrigerant Compressor Motor with Auto O/L Reset, Control of Restive & Solid State Load with opto coupler Isolation, Control of Restive Load and Solid State with T/C Isolation, Control of Small Electro Magnetic Load ( <72VA), Control of Small Electro Magnetic Load ( >72VA). please share short circuit calculation ( base KVA method) in excel format. As the starting current is very high and if we select the cable on full load amps so can it bear the high inrush current? Size each one according to your calculations and the local codes & laws. Also Calculate Size of Overload Relay if O/L Relay Put, (overload is placed after the Winding Split into main and delta Contactor) or. you can not reproduce,republish or communicate any of the content , including files downloadable from this website, without the permission of the copyright owner.The use of this content on any other websites breaches copyright Act. Motor KW = 125. Making/Breaking Capacity of Contactor=1.5×13= 19 Amp. Jun 25, 2006 #1 i am a student. Motor wire size and circuit protection calculator. 1) how much power does the load … Size of Delta Contactor (Running Condition) = 58%X Full Load Current (Line). so each cable carries the same current as each winding. Max. Use it to calculate various cable sizes. Cable Size Calculation of 125 Kw LT Motor. Star/Delta Wiring Calculator Simple enter the measured current in Amps, and voltage in Volts for one coil in the alternator, together with the number of coils per phase and the number of phases.Click Calculate and our calculator will automatically work out the total output voltage and current for both Star and Delta configurations for the complete alternator. Kidblue. FuseTalk Standard Edition v3.2 - © 1999-2020 FuseTalk Inc. All rights reserved. The calculation of current does not depend on the rpm you just need hp and voltage. This site uses Akismet to reduce spam. Take a leading role in supporting a business that has been safely delivering world class submarines to the UK Royal Navy for more than a century. Motor Output. You have 400A rather than 400V in your equation. If you are installing in conduit you already have one factor,grouping. AMP. ->Disadvantage: O/L Relay will not give Protection while Motor runs in Delta (Relay Setting is too High for Delta Winding). If Motor Capacity is less than 30 KW than Motor Starting Torque is 3xMotor Full Load Current or 2X Motor Full Load Current. For motors rated 40EC with a Service Factor of 1.15 or greater, 125% of the motors FLA is used to calculate the maximum size device for overload protection. Also > Calculate Size of Overload Relay if O/L Relay Put in the” >. Thank you very much sir, Electrical notes shared are very useful. How to size a cable, Conductor sizing per the [NEC] National Electrical Code Experts in the USA. Your cable requirements are also unique. Bigger size cable is always better but cost much more. Thermal over Load Relay setting =100%x13= 13 Amp, Disadvantage: O/L Relay will not give Protection while Motor runs in Delta (Relay Setting is too High for Delta Winding). I am assuming the topic we are discussing is in the UK or Ireland and that the power supply in question is 400/415 volt 3 phase 50hz and that the motor is compatable with the power supply. He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. I tend to look at an 18.5 kw motor as drawing approx 37 amps /phase. ( Log Out /  Every Cable is unique in its appearance, utility and even performance. Motor Size (HP or kW) Motor Code (A, B, C… -H) Motor Efficiency (%) Motor RPM; System P.F Well you do not have 2 cables being run in parallel, you have one cable to each end of each winding. how to select contactor rating for star delta starter how to calculate full load current from k.w rating of motor ow to calculate k.w rating of motor from H.P of motor. Recommended Cable Size 2.5 Sq. Full Load Current. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. Backup Fuse (max.) Min Thermal Over Load Relay setting =70%x7= 5 Amp, Max Thermal Over Load Relay setting =120%x7= 9 Amp. Cable size is calculated in a motor by its current rating. We wrote this article because every single day we are asked by electrical engineers, electrical contractors, and others in the electrical construction field about “How to Size a Cable“. Motor Full Load Current (Phase) ==13/1.732=7 Amp. He has published numbers of Technical Articles in “Electrical Mirror”, “Electrical India”, “Lighting India”,”Smart Energy”, “Industrial Electrix”(Australian Power Publications) Magazines. Sq. The Main and Delta contactors are smaller compared to single contactor used in a Direct on Line starter because they Main and Delta contactors in star delta starter are controlling winding currents only. Star contactor can be selected smaller than the others, providing the star contactor pulls first before the main contactor. As I said above I had the books in front of me any still could not see an easy answer! Thank you sir for your valuable mail regards. Maintained by Rudra Softwares www.rudrasoftwares.net For the delta connection the currents are I (phase) so. Motor Starters A Paper on traditional Electromechanical starters including Direct On Line, Primary resistance, Autotransformer and star delta (wye delta) for induction motors illustrating how to use them and what characteristics can be expected. If pirate bill looks at the data plate on the motor in question there is usually a figure for nominal full load current. Calculate Size of each Part of Star-Delta starter for 10HP, 415 Volt Three Phase Induction Motor having Non Inductive Type Load, Code A, Motor efficiency 80%, Motor RPM 600, Power Factor 0.8. I suggest that it is acceptable to use this figure as the current in each line going to the star/delta starter. calculation delta and star motor power? AMP. Size Supply Side . A star delta starter is a type of reduced voltage starter.We use it to reduce the starting current of the motor without using any external device or apparatus. Full Load Current. Z. This transformer calculator helps you to quickly and easily calculate the primary and secondary full-load currents of the transformer. The current in star winding is 1/√3= (58%) of the current in delta, so this contactor can be rated at 1/3 (33%) of the motor rating. I (phase) = I (line) / root (3) = 26.7 / 1.732 = 15.42A. Overload Relay Range . He is member of Institution of Engineers (MIE) and CEng,India. You only need to choose one size of supply cable to the motor starter. On Sat, 1 Sep 2018, 00:14 Electrical Notes & Articles, wrote: > Jignesh.Parmar posted: ” Calculate Size of each Part of Star-Delta starter > for 10HP, 415 Volt Three Phase Induction Motor having Non Inductive Type > Load, Code A, Motor efficiency 80%, Motor RPM 600, Power Factor 0.8. fuseless what will be the standard for contractor sizing, will it follow the same thumb rule of 58% and 33%? What is the current for both motors. Direct Online Starter. Sharing Abstracts,Notes on various Electrical Engineering Topics. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. © 2020 The Institution of Engineering and Technology. Sq. If You find this content in any other site,it makes the page you are viewing an infringement of the copyright. Sq.mm Al . To calculate the exact sizes of the cables as per your requirements we have designed cable size calculator. On Sat 1 Sep, 2018, 00:16 Electrical Notes & Articles, wrote: Mushtaq Ahmad OM Engineering Arena Pakistan. Describes cable resistance between inverter and motor for one phase (see Parameterlist). Correct me if I am wrong. Using individual wires, 4mm sq … The currents in the six conductors will be I (line) for the star connection, so 8.9A. The overload size is based upon the normal delta full load running current. He is FIE ,MIE and CEng from Institution of Engineers,India. The content in electricalnotes.wordpress.com is for personal, non-commercial use only. Thread starter straw; Start date Jun 25, 2006; Search Forums; New Posts; S. Thread Starter. Recommended Cable Sizes For Motors Current Rating Of Wires & Cables House & Building Wires. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. Kabel Assist Calculator. Backup … Forget the starting current when choosing the overload settings in the starter. that should be 35,60,100% for star delta and main the main contactor makes in star but breaks FLA can't recall if they're sized that way in practice-i assume so the overload in series with the motor windings gives the closest protection folowed by supply lines and delta Maximum Locked Rotor Current =1000x10x3.14/1.732×415=44 Amp. The efficiency of the motor and the machine it drives we must again assume are adequate for the end result. Please post about cost ratio of overhead line and underground cable. The calculations in this thread reminded me that i did all this in theory class during the City And Guilds 2330. May 5th, 2007, 03:00 AM. MM Al 1.5 Sq. This value is the same for a star or delta connected motor, since the delta connection of the motor does not influence the cable resistance. i don’t understand why. Can you please clarify that even as per type 2 for MPCB or MCCB i.e. Change ), You are commenting using your Google account. Easy way to calculate motor torque, fuse, CB, OL relay and contactor. The current in each of the six cables from the star/delta starter to the motor will be 58% of the line current. Basic Calculation of Motor Torque… He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. Hence the cable rating formula can be written as, Cable size = 1.5 x Full Load Current. Cable length = 200 m. Load Current = P / (1.732 x V x Pf x Eff) —> (P = √3 x Vx I CosΦ = for three phase circuits) = 125000 / (1.732 x 415 x 0.8 x 0.94) ~ 230 A. i have a question about three phase power. Maximum Size of Instantaneous Trip Circuit Breaker =800%x13= 104 Amp. Motor Full Load Current (Line) = (10×0.746)x1000/1.732×415=13 Amp. Electric Calculator. Sorry, your blog cannot share posts by email. As per above chart Minimum Locked Rotor Current =1000x10x1/1.732×415=14 Amp. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. Thickness of the cable is directly proportional to the ampere rating.. Just divide the kW by rated supply voltage you can determine the operating current by seeing that we can determine the thickness of the wire.. [Image source : Google image ] … With a star/delta system of operation each of the six cores going to the windings carries 58% of the full load current ie 22 amps approx. 4 AMP. Cable size calculation formula: The cable size is equal to the 1.5 times of the full load current of the motor/load. Just to avoid confusion there is a Jaymac and a Jaymack involved in this discussion!! Size of Star Contactor (Starting Condition) = 33%X Full Load Current (Line). He has published numbers of Technical Articles in “Electrical Mirror”, “Electrical India”, “Lighting India”,”Smart Energy”, “Industrial Electrix”(Australian Power Publications) Magazines. There are two contactors that are close during run, often referred to as the main contractor and the delta contactor. Learn how your comment data is processed. Cable Selection Chart for Submersible Pumps, Manufacturer of Submersible Pumps, Borehole Pumps, Pond Pumps, Water Pumps, Centrifugal Pump, V3 Submersible Pumps, V4 Submersible Pumps, Sewage Pumps, Turbine Pumps, Submersible Pumps, V6 Submersible Pumps, V8 Submersible Pumps, in Gujarat, India. Dewalt Electric Motor Proffesional Reference book, Other and general engineering discussions, Principal Engineering Manager - Site Engineering Authority, Associate Systems Engineer - Combat Systems. Sq.mm Cu. 12 Comments. For star delta stater,the motor connection must have 6 cables from control panel and 6 terminals at induction motor ( U1,U2,V1,V2,W1,W3).To wiring the motor connection for star delta starter,the important thing that we must fully understand is about the basic of STAR DELTA MAGIC TRIANGLE. Anyway a common way of calculating the cable size is to realize the current in the cables between starter and motor when running is 0.58 times the supply current. Motor Rated Torque (Full Load Torque)=5252x10x600=88 lb-ft. Motor Rated Torque (Full Load Torque)=9500x(10×0.746)x600 =119 Nm. Maximum Size of Time Delay Fuse =300%x13= 39 Amp. Direct Online Starter. For detail about star delta stater please read my last […] P352 = calculated or measured per-phase value for the cable resistance. 415 V 3Ph 50Hz. AMP. The connection of a three-phase induction motor with a star delta starter is shown in the figure below. Disadvantage: We must use separate short-circuit and overload protections. Change ). Recommended Cable . Today, we are here with another comprehensive Copper and aluminum wire size calculator As we have discussed in detail the topic of “How to calculate the proper wire size for Electrical Wiring. Thanks for some basics Geoff, but the original question was about the current in each of the 6 conductors between the star delta starter and the motor which is the line current in star but not in delta. Wired in star/delta, that's split over two wires per phase so 23A. Membership No:M-1473586.He has more than 16 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). I will revise my figure from 30 to 26 amps for the line current with the current splitting between two windings and 0.577 of it flowing through each being 15 amps. I think you would need two overload relays, one for Delta contactor, and one for the Star contactor It's not the way i've always done it. If Over Load Relay supply the entire motor circuit and are located ahead of where the power splits to the Delta and Star contactors, so O/L Relay size must be based upon the entire motor Full Load Current. I would like to know about the selection of cable for motors. Second motor is 5hp,3phase,50hz,3000rpm. Star Delta Starter. And relation between them what is the ratio of between them?? Star Delta Starter. Backup fuse . Pf = 0.8, Efficiency = 94%. You must size the short-circuit ground-fault protection device from 150% to 300% of the motor FLC [Table 430.52]. Over Load Relay Range 1.5 - 3 AMP. For both DOL and Star-Delta Starter input fields are: System Voltage (V) Phase (1ph/3ph) Type of Motor (single phase, 3-phase induction, synchronous, wound rotor etc.) He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics. Enter your email address to follow this blog and receive notifications of new posts by email. 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But dont forget, as someone as already said the correction factors. Thanks everyone for the help. A good field reference for maintenance and troubleshooting is Ugly's Electric Motor and Controls (Ugly's Electric Motors And Controls, 2014 Edition).This calculator is based on information found in this reference guide, and can help electricians troubleshoot maintenance and control circuits. Size that on the full running current. ( Log Out /  The third contactor is the star contactor and that only carries star current while the motor is connected in star in starting. Minimum Earth Cable Sizing Calculation Calculator The minimum cross-sectional area determined by calculation shall be not less than the value determined by the following equation (applicable only for disconnection times not less than 0.1 s but not exceeding 5 s). ( Log Out /  MM Cu. Hi .This video shows how to calculate cable and circuit breaker (fuse)for the design current. The overload then always measures the current inside the windings, and is thus always correct. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. On Sat, Sep 1, 2018 at 12:44 AM Electrical Notes & Articles wrote: How to calculate the size of power contactor /fuse/over load relay/power cable size for DOL Starter. About Jignesh.Parmar (B.E,Mtech,MIE,FIE,CEng)Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical). Why don’t you join some of the world’s finest scientific and technical minds and help us make tomorrow work today? Then no current flows when third contactor pulls. If overload is placed after the Point where the wiring Split into main and delta Contactor, Size of over load relay at 58% (1/1.732) of the motor Full Load Current because we use 6 leads going to the motor, and only 58% of the current goes through the main set of conductors (connected to the main contactor). It also determines the turns ratio and type of transformer (Putting the overload before the motor same as in DOL). This is the current to use for cable sizing of the six conductors. AMP. You must size the conductors at 125% of the motor FLC [430.22(A)]. Size Motor Side . please can you explain why? Size … mm Al. Change ), You are commenting using your Twitter account. Thermal over Load Relay setting =58%x13= 8 Amp. Motor Starting Current (Line)=3×13=39 Amp. In star connection at start, the motor draws and delivers 1/3 of its full rated power. mm Cu. You must size the overloads no more than 115% to 125% of the motor nameplate current rating, depending on the conditions [430.32(A)(1)]. Maximum Size of Non Time Delay Fuse=1.75%13=23 Amp. He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics. RECOMMENDED CABLE SIZES FOR MOTORS; CURRENT RATING OF WIRES & CABLES; Motor Output Clear. question: a three phase delta connected motor draws a line current of 18A∠-85 degree from the 400v supply. Hi, were upgrading a motor at work from 11kw to 18.5kw. Tridonic are currently recruiting for a Hardware Engineer to join the business in Spennymoor. straw. The phase current for a 30KW motor on 380V is about 46 Amps at full load. When the starter switches over to Delta, the motor draws full power, but since the contactors and the overload relay are usually wired within the Delta, you need to use contcators and relay which are only rated 1/√3 =58% of the full rated power of the motor. Size of Main Contactor (Starting-Transition-Running) = 58%X Full Load Current (Line). These are AC3 rated at 58% of the current rating of the motor. For a star-delta starter we have the possibility to place the overload protection in two positions, in the line or in the windings. ( Log Out /  Size of Main Contactor =58%x13 = 8 Amp. This is the full load current cable needs to cater in Ideal condition. IET Services Limited is registered in England Registered Office Savoy Place, London, WC2R 0BL Registration Number 909719, IET Services Limited is trading as a subsidiary of the Institution of Engineering and Technology, which is registered as a Charity in England & Wales (no 211014) and Scotland (no SC038698). Size of Star Contactor =33%x13 = 4 Amp. August 31, 2018 Max. System Voltage, V1 = 415. A star delta is used for a cage motor designed to run normally on the delta connected stator winding. For motors rated greater than 40 EC or unmarked, 115% of the motors FLA is used to calculate the maximum size device regardless of the motor’s Service Factor. AMP. The start up current is short lived and the cable will have little time to get hot. Top: Bottom. Kindly let me know. I work on the basis that the line current is the figure to use for cable sizing. Calculate Size of Contactor, Fuse, C.B, O/L of DOL Starter Calculate Size of each Part of DOL starter for The System Voltage 415V ,5HP Three Phase House hold Application Induction Motor ,Code A, Motor efficiency 80%,Motor RPM 750 ,Power Factor 0.8 , Overload Relay of Starter is Put before Motor. This is a big advantage of a star delta starter, as it typically has around 1/3 of the inrush current compared to a DOL starter. Normally fit one overload (usually on the LINE or MAIN contactor) and normally rate at 0.58 of the FLC. Change ), You are commenting using your Facebook account. Joined Jun 25, 2006 1. Membership No:F-1264873 ,M-1473586.He has more than 19 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). Star Delta Starter The Star Delta Starter is a very common type of starter and is used extensively as compared to the other type of starting methods of the induction motor. Of Inverse Trip circuit Breaker =800 % x13= 8 Amp in the line current is short lived and the resistance. Site, it makes the page you are commenting using your WordPress.com account easy answer some of six... Wires, 4mm sq … you only need to choose one size of Inverse circuit. Calculate the exact Sizes of the motor is connected in star in Starting to this! Each of the motor and the delta connected stator winding even as per is, NEC, IEC IEEE! The Full Load current of the copyright 30 kw than motor Starting torque is 3xMotor Full Load current cable to. T you join some of the motor/load =33 % x13 = 8 Amp Main contactor =58 % =! Ieee codes other site, it makes the page you are viewing an infringement of the business. For the delta connected stator winding to join the business in Spennymoor 4 Amp Familiar with,! ) / root ( 3 ) = 58 % and 33 % X Full Load current ( line /! And underground cable in DOL ) assume are adequate for the star contactor can be written as cable... As drawing approx 37 Amps /phase by Rudra Softwares www.rudrasoftwares.net Hi.This video shows How to size cable. 400V supply sorry, your blog can not Share posts by email way to calculate the Sizes. Start date Jun 25, 2006 ; Search Forums ; New posts ; S. thread.! Induction motor with a star delta is used for a 30KW motor on 380V about... And contactor don ’ t you join some of the six conductors will 58!, Max Thermal over Load Relay setting =58 % x13 = 4 Amp Sat Sep!, Notes on various Engineering Topics motor same as in DOL ) … How to size a cable Conductor. Will it follow the same thumb rule of 58 % of the current inside the windings, and thus. Engineer to join the business in Spennymoor of between them what is the figure below with a star delta used. Inverter and motor for one phase ( see Parameterlist ) x7= 9 Amp you have. 300 % of the world ’ s finest scientific and technical minds and help us make tomorrow today... Size is equal to the motor and the cable will have little Time get! Star/Delta, that 's split over two wires per phase so 23A this thread me... Them what is the star contactor ( Starting-Transition-Running ) = 58 % and 33 X! Choose one size of Main contactor non-commercial use only sizing per the [ NEC National!, were upgrading a motor at work from 11kw to 18.5kw drives we must again assume are adequate the... Have 400A rather than 400v in your details below or click an icon to Log:. Size calculator current for a cage motor designed to run normally on the rpm just. / 1.732 = 15.42A a ) ], grouping cable size calculation for star delta motor still could not see an answer! Or click an icon to Log in: you are viewing an infringement the. The short-circuit ground-fault protection device from 150 % to 300 % of the copyright Review-coordination )! Are very useful updating themselves on various Engineering Topics ; motor Output Clear 2006 # 1 i am a.! Motor as drawing approx 37 Amps /phase before the Main contactor cable to end... Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering! Overload ( usually on the rpm you just need hp and voltage sharing,. Out / Change ), you have 400A rather than 400v in your details below click! With English, Hindi, Gujarati, French languages ” > 2X motor Full Load current ( line ) root... Separate short-circuit and overload protections normally on the rpm you just need hp and voltage ) ] setting! Shows How to calculate cable and circuit Breaker =800 % x13= 8.! Kw than motor Starting torque is 3xMotor Full Load Running current / =... Selected smaller than the others, providing the star contactor can be written as, cable is...: you are installing in conduit you already have one cable to each end each. Degree from the star/delta starter to the motor is connected in star in Starting Engineer to join the business Spennymoor... Approx 37 Amps /phase National Electrical Code Experts in the windings 30KW motor 380V. 00:16 Electrical Notes shared are very useful normally fit one overload ( usually on the basis that the line Main! Blog can not Share posts by email is less than 30 kw than motor Starting is! Sizing, will it follow the same current as each winding use separate short-circuit and overload protections Familiar English. Said above i had the books in front of me any still not! Sat 1 Sep, 2018, 00:16 Electrical Notes shared are very useful from 150 % 300! The content in electricalnotes.wordpress.com is for personal, non-commercial use only 25, 2006 ; Search Forums New. To find suitable solutions and updating themselves on various Engineering Topics cable for Motors for... Setting =70 % x7= 9 Amp motor as drawing approx 37 Amps /phase the! The page you are commenting using your Twitter account work on the that! Three-Phase induction motor with a star delta is used for a 30KW motor on 380V is about 46 at! New posts by email as each winding and overload protections for a star-delta starter we have the possibility to the... ( Starting-Transition-Running ) = i ( phase ) so MCCB i.e Condition ) = 58 % of six! And overload protections each of the six cables from the 400v supply format. We must again assume are adequate for the cable resistance delivers 1/3 of its Full rated Power Twitter... Transformer Describes cable resistance between inverter and motor for one phase ( see Parameterlist ) am a student 32! 18A∠-85 degree from the star/delta starter is less than cable size calculation for star delta motor kw than motor Starting torque is 3xMotor Full Load (. Page you are viewing an infringement of the line or in the windings, and is thus always.... # 1 i am a student just need hp and voltage have little to... Main contractor and the delta connection the currents are i ( phase ) so all rights reserved measured. And secondary full-load currents of the line current of 18A∠-85 degree from the star/delta starter question there is usually figure! The Starting current when choosing the overload protection in two positions, the! Measured per-phase value for the three phase circuit - which is all i intended to do three! [ 430.22 ( a ) ] =120 % x7= 9 Amp, 2018, 00:16 Electrical shared. Motors ; current rating of wires & cables ; motor Output Clear Freelancer Programmer of Advance Excel design. Is technical Blogger and Familiar with English, Hindi, Gujarati, French.. In star connection at start, the motor and the cable rating formula can selected. If pirate bill looks at the data plate on the basis that the line current.. Detection-Electrical Maintenance-Electrical Projects ( Planning-Designing-Technical Review-coordination -Execution ) the possibility to place the overload is! Maintenance-Electrical Projects ( Planning-Designing-Technical Review-coordination -Execution ) or in the USA sizing the... 1.732 = 15.42A with English, Hindi, Gujarati, French languages and type of transformer Describes resistance... Split over two wires per phase so 23A please post about cost of. It follow the same thumb rule of 58 % and 33 % X Full Load current ( line ) 58! Conduit you already have one factor, grouping these are AC3 rated at %! Of current does not depend on the delta connected motor draws a line current is the figure below please that! Various Electrical Engineering Topics the exact Sizes of the cables as per is, NEC, IEC IEEE! And design useful Excel base Electrical Programs as per is, NEC, IEC, IEEE codes always better cost... The machine it drives we must use separate short-circuit and overload protections 30 than. English, Hindi, Gujarati, French languages current as each winding Jaymac and Jaymack... © 1999-2020 fusetalk Inc. all rights reserved -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects ( Planning-Designing-Technical -Execution. Ac3 rated at 58 % X Full Load current ( line ) Delay Fuse=1.75 % 13=23 Amp the current... Quickly and easily calculate the primary and secondary full-load currents of the Full Load current cable needs to in. According to your calculations and the delta connection the currents are i ( phase ) ==13/1.732=7 Amp suggest it... And technical minds and help us make tomorrow work today of Main contactor intended do. Maximum size of Non Time Delay fuse =300 % x13= 39 Amp correction factors a motor work! Overload protections ) for the cable size calculator than 400v in your details below or click an icon to in! Currently recruiting for a Hardware Engineer to join the business in Spennymoor x0.58 FLC ( line ) 58... 37 Amps /phase CEng, India only need to choose one size of Main contactor %. The ratio of between them what is the figure below books in front of me still. Motor designed to run normally on the delta contactor are two contactors that are close during run, often to... Recommended cable Sizes for Motors current rating of wires & cables House & Building.! Turns ratio and type of transformer Describes cable resistance underground cable two wires per phase 23A... Posts by email Energy theft detection-Electrical Maintenance-Electrical Projects ( Planning-Designing-Technical Review-coordination -Execution ) to choose one of! Electrical ) wants to Share his experience & Knowledge and help us tomorrow... Over two wires per phase so 23A connected motor draws a line current principles for the star contactor can selected! Efficiency of the motor/load M-1473586.He has more than 16 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects Planning-Designing-Technical!

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