3 PHASE MOTOR WINDING RESISTANCE CHART PDF



3 Phase Motor Winding Resistance Chart Pdf

INSTRUCTIONS FOR THREE PHASE INDUCTION MOTORS. To measure the resistance in a three-phase motor, you will need a megohmmeter, otherwise known as a megger. Unlike an ohmmeter, a megger can measure high-voltage resistance values, which are generally the kinds of values you will encounter with three-phase motors., The life of a three-phase stator winding can be shortened dramatically when the motor is exposed to unfavorable operating conditions — electrical, mechanical or environmental. The winding failures illustrated here are typical of what can happen is such circumstances. Failures are shown here to help identify the causes of failure, so that.

How do we calculate the winding resistance of a motor by

How To Test Three Phase AC Motors ~ Learning Electrical. 27/10/2010В В· just curious,but why do you want to know? i would say the winding resistance of a 15kw motor would be close to zero while on small motors you would get much higher, if checking look for 3 very similar readings. cant think of a calculation other than R=P/I^2 but dont think that would work for 3 phase where P=SQ RT3*V*A*PF, so in summary, sorry, This post is about the single phase motor winding resistance testing with complete explanation. From this article you will learn about the single phase induction motor winding resistance, main winding, starting winding. And how to identify start, run and common in the winding..

3 PHASE MOTOR TESTING PROCEDURE The Patriot ,Mill Turn and Turnado machines are equipped with 3 phase motors. Each motor has 3 separate windings. The windings are marked with tags U-1 and U-2, V-1 and V-2, W-1 and W-2. In the running configuration, the windings are joined with metal jumpers. In MEASURE THE WINDING RESISTANCE OF A THREE-PHASE MOTOR WITH A RESISTANCE METER The measurement of the winding resistance in a running three-phase motor with the ELETTROTEST Resistance Meter requires some precautions since the single phases can influence each other reciprocally. Typically, a 2-channel resistance meter is used, with 3 inlets and 3

Electric motor winding calculator. The winding calculator allows you to find the optimum winding layout for your electric motor in a fast and convenient way. You can investigate three-phase integer-slot, fractional-slot and concentrated windings, both with single and double winding layers where appropriate. phase values for a BLDC motor. Brushless dc motors (BLDC) are 3 phase synchronous motors used in a configuration to be treated as dc drives. MOTOR RESISTANCE For the winding resistance use an ohmmeter. For a dc motor measure the resistance between the 2 armature wires. If it is a WYE connected BLDC motor, the resistance is the line-to-line

If the motor is kept in a place with high humidity, a periodical inspection is necessary. It is practically impossible to determine rules for the actual minimum insulation resistance value of a motor because resistance varies according to method of construction, condition of insulation material used, rated voltage, size and type. 25/06/2011В В· 3 phase motor winding resistance i was looking at an airhandler today at a powerplant that was tripping the breaker. After jumping through all the hoops to get the clearance to work on the thing. i started checking for shorts. i found the fuse block for the 3 phase blower motor burnt up. I went to check the windings of the motor to see if they were grounded and they were not. but i was getting

Electric motors for explosive atmospheres - Instructions manual for installation, operation and maintenance of electric motors Date: 08/14/2019 split-phase motors The split-phase motor has a starting and running winding. The starting winding is automat- ically removed by a centrifugal switch as the motor accelerates. Some split-phase motors also include a thermal switch that automatically turns the motor OFF when it overheats. Thermal switches may have a manual reset or automatic reset. Caution should be taken with any motor that has

identified. If leads 1-2-3 and 5-4-6 are swapped, the motor will probably run on the high speed connection, but it will be noisy and the speed will be Identifying Unmarked Leads Of 6-Lead Motors With 1 Or 2 Windings Procedures Also Help Identify Type Of Connection When There Is No Nameplate Table 3. Resistance ratio of Variable Torque leads. The induction motor is made up of the stator, or stationary windings, and the rotor. The stator consists of a series of wire windings of very low resistance permanently attached to the motor frame. As a voltage and a current is applied to the stator winding terminals, a magnetic field is developed in the windings. By the way the stator windings are arranged, the magnetic field appears to

split-phase motors The split-phase motor has a starting and running winding. The starting winding is automat- ically removed by a centrifugal switch as the motor accelerates. Some split-phase motors also include a thermal switch that automatically turns the motor OFF when it overheats. Thermal switches may have a manual reset or automatic reset. Caution should be taken with any motor that has Three-phase asynchronous motors: generalities and ABB proposals for the coordination of protective devices 3 1 Three-phase asynchronous motor 1 Three-phase asynchronous motor 1.1 Typologies and use A three-phase asynchronous motor can have - a slip-ring rotor or - a short-circuit rotor, more commonly defined squirrel-cage rotor.

MEASURING MOTOR PARAMETERS Control Technology Corp

3 phase motor winding resistance chart pdf

Column-by-Column Winding Resistance in Ohms Franklin AID. 4 2.2.5 Long period storage If the motor is not in operation for a long period (one week and above) after installation or has been in operation but stopped for a period of …, life of a three-phase stator winding can be shortened dramatically when the motor is exposed to unfavorable operating conditions - electrical , mechanical or environmental.The winding failures illustrated in this brochure are typical of what can happen in such circumstances. They are shown here to help in identifying the causes of.

MEASURE THE WINDING RESISTANCE OF A THREE-PHASE

3 phase motor winding resistance chart pdf

Routine Test of Three Phase Induction Motor. This post is about the single phase motor winding resistance testing with complete explanation. From this article you will learn about the single phase induction motor winding resistance, main winding, starting winding. And how to identify start, run and common in the winding. https://en.m.wikipedia.org/wiki/Wound_rotor_motor 27/10/2010В В· just curious,but why do you want to know? i would say the winding resistance of a 15kw motor would be close to zero while on small motors you would get much higher, if checking look for 3 very similar readings. cant think of a calculation other than R=P/I^2 but dont think that would work for 3 phase where P=SQ RT3*V*A*PF, so in summary, sorry.

3 phase motor winding resistance chart pdf


Three phase scroll compressors only rotate in one direction. It is simple enough on a 3 phase scroll compressor to swap the location of T1 and T2 to reverse the rotation and check if it was wired to rotate in the wrong direction. In 3 phase reciprocating compressors, they can rotate in either direction with out any issues. Although, if the To operate correctly, the coiled wire should have a predetermined resistance specified by the manufacturer. This resistance allows just the right amount of current to flow through the coil. You should regularly check the resistance of the windings in a motor to be sure its operating at peak ability.

scale. Fig. 3 shows a typical scale, which reads increasing resistance values from left up to infinity, or a resistance too high to be measured. Figure 4–Typical record of insulation resistance of a mill motor. Curve A shows test values as measured; Curve B shows same values corrected to 20°C (see page 22), giving a definite downward 25/06/2011 · 3 phase motor winding resistance i was looking at an airhandler today at a powerplant that was tripping the breaker. After jumping through all the hoops to get the clearance to work on the thing. i started checking for shorts. i found the fuse block for the 3 phase blower motor burnt up. I went to check the windings of the motor to see if they were grounded and they were not. but i was getting

Here we are giving you only overview on 3 phases induction motor. 3 phase induction motor have 3 winding; assume U, V and W. Every winding has its own resistance. But all winding have same resistance. Total number of wire coming from motor are 6 i.e. U1, U2, V1, V2, W1 and W2. When these three winding are connected in STAR or DELTA connection identified. If leads 1-2-3 and 5-4-6 are swapped, the motor will probably run on the high speed connection, but it will be noisy and the speed will be Identifying Unmarked Leads Of 6-Lead Motors With 1 Or 2 Windings Procedures Also Help Identify Type Of Connection When There Is No Nameplate Table 3. Resistance ratio of Variable Torque leads.

4 2.2.5 Long period storage If the motor is not in operation for a long period (one week and above) after installation or has been in operation but stopped for a period of … Three Phase Ac Winding Calculation 1. Three-Phase AC Winding Calculations ( single-speed windings) Kinds of diagrams This calculations program includes all necessary details for rewinding three-phase motors: the type of windings, number of layers, parallel circuits, span and number of turns per coil , number and cross section of

Dc test for DC winding resistance. Open circuit and short circuit test for other components like transformer Grundfos Motor Book 26 Grundfos Motor Book Single-phase dual-voltage motors 2. Single phase motors Single-phase dual-voltage motors Single-phase dual-voltage motors comprise two main windings, a starting winding, and a run capacitor . They are widely used in the USA, where the single-phase supply is either 1 x 115 V/60 Hz or 1 x 230 V/60 Hz

3 phase motor winding resistance chart pdf

phase values for a BLDC motor. Brushless dc motors (BLDC) are 3 phase synchronous motors used in a configuration to be treated as dc drives. MOTOR RESISTANCE For the winding resistance use an ohmmeter. For a dc motor measure the resistance between the 2 armature wires. If it is a WYE connected BLDC motor, the resistance is the line-to-line 13/12/2013В В· 3 phase motors Top 7 Mistakes Newbies Make Going Solar - Avoid These For Effective Power Harvesting From The Sun - Duration: 7:14.

How to check the Windings of a 3-Phase AC motor with an

3 phase motor winding resistance chart pdf

3 Phase Induction Motor Winding Resistance Chart Pdf. 27/10/2010В В· just curious,but why do you want to know? i would say the winding resistance of a 15kw motor would be close to zero while on small motors you would get much higher, if checking look for 3 very similar readings. cant think of a calculation other than R=P/I^2 but dont think that would work for 3 phase where P=SQ RT3*V*A*PF, so in summary, sorry, Three-phase asynchronous motors: generalities and ABB proposals for the coordination of protective devices 3 1 Three-phase asynchronous motor 1 Three-phase asynchronous motor 1.1 Typologies and use A three-phase asynchronous motor can have - a slip-ring rotor or - a short-circuit rotor, more commonly defined squirrel-cage rotor..

Rewinding 3 Phase Motor 54 Steps (with Pictures)

The Complete Guide to Electrical Insulation Testing. Three-phase asynchronous motors: generalities and ABB proposals for the coordination of protective devices 3 1 Three-phase asynchronous motor 1 Three-phase asynchronous motor 1.1 Typologies and use A three-phase asynchronous motor can have - a slip-ring rotor or - a short-circuit rotor, more commonly defined squirrel-cage rotor., 04/02/2017В В· I check the windings in the motor for my Bradford Lathe. I also provide some simplified (read right-ish) information about the electrical nature of the motor..

scale. Fig. 3 shows a typical scale, which reads increasing resistance values from left up to infinity, or a resistance too high to be measured. Figure 4–Typical record of insulation resistance of a mill motor. Curve A shows test values as measured; Curve B shows same values corrected to 20°C (see page 22), giving a definite downward How to Calculate Motor Current With Winding Resistance is equal to the voltage divided by the resistance. You can determine the resistance of a motor coil if you know the wire gauge, the radius of the solenoid and the number of windings. Wire Resistance. Ohm's law tells you that you can calculate the current through a motor winding if you know the voltage and the resistance of the wire

split-phase motors The split-phase motor has a starting and running winding. The starting winding is automat- ically removed by a centrifugal switch as the motor accelerates. Some split-phase motors also include a thermal switch that automatically turns the motor OFF when it overheats. Thermal switches may have a manual reset or automatic reset. Caution should be taken with any motor that has Routine Test of Three Phase Induction Motor Vishant Naik1, Saurabh K Singh2, Sahil Chawhan3, Jatin Wankhede4, 2.4 WINDING RESISTANCE TEST A typical 3-phase squirrel-cage motor has six connection leads in the electrical connection box for the three coils. If someone works with AC 3-phase motors, then it is important to know how to connect these motors in Star and Delta connection, and how

This post is about the single phase motor winding resistance testing with complete explanation. From this article you will learn about the single phase induction motor winding resistance, main winding, starting winding. And how to identify start, run and common in the winding. 2 Fluke Corporation Three-phase motors 3. Disconnect the motor from the load. 4. After the load is disconnected, turn power ON to try restart-ing the motor. If the motor starts, check the load. 5. If the motor does not start, turn it OFF and lock out the power. 6. With an ohmmeter, check the motor windings for any opens or shorts. Take a resistance

AC Motor Winding Resistance Test Check the motor winding resistance or ohms reading using a multimeter or ohmmeter for phase to phase terminal ( U to V,V to W ,W to U ).The ohms reading for each winding must be the same (or nearly the same). Remember that the three phases have identical windings or nearly so! Insulation Resistance Test Electric motor winding calculator. The winding calculator allows you to find the optimum winding layout for your electric motor in a fast and convenient way. You can investigate three-phase integer-slot, fractional-slot and concentrated windings, both with single and double winding layers where appropriate.

Which formulas do I need to calculate current of a 3phase induction motor. Ask Question Asked 3 years, 5 months ago. Do I need to get somebody to measure Tesla winding resistance to be able to calculate it for Tesla Motors? Is there any other number I need that can only be gotten from a real/already built motor? three-phase induction-motor igbt. share improve this question. asked Apr 7 Electric motors for explosive atmospheres - Instructions manual for installation, operation and maintenance of electric motors Date: 08/14/2019

Three Phase Ac Winding Calculation 1. Three-Phase AC Winding Calculations ( single-speed windings) Kinds of diagrams This calculations program includes all necessary details for rewinding three-phase motors: the type of windings, number of layers, parallel circuits, span and number of turns per coil , number and cross section of Three-Phase Dual-Voltage Motor Insulation Resistance Testing Three-phase dual-voltage motors are used for most day-to-day operations in today’s industrial plants. These motors run conveyor belts, pumps, fans, and many other applications. Motors are susceptible to the gradual failure of their insulation resistance. The primary causes of insulation failure include: electrical stress (current

It may not be possible, in my opinion. For the same KW rating, depending on the type of winding chosen and the SWG of wire selected, the winding resistance will vary. If you have access to the RTC (Routine Test certificate) of the manufacturer, yo... Grundfos Motor Book 26 Grundfos Motor Book Single-phase dual-voltage motors 2. Single phase motors Single-phase dual-voltage motors Single-phase dual-voltage motors comprise two main windings, a starting winding, and a run capacitor . They are widely used in the USA, where the single-phase supply is either 1 x 115 V/60 Hz or 1 x 230 V/60 Hz

To operate correctly, the coiled wire should have a predetermined resistance specified by the manufacturer. This resistance allows just the right amount of current to flow through the coil. You should regularly check the resistance of the windings in a motor to be sure its operating at peak ability. I always megger a 3 phase 480V motor phase to ground, but I am wondering if meggering phase to phase can tell me something about the state of the winding insulation as well, and what kind of a reading I would be looking for considering the windings are "shorted" together.

To operate correctly, the coiled wire should have a predetermined resistance specified by the manufacturer. This resistance allows just the right amount of current to flow through the coil. You should regularly check the resistance of the windings in a motor to be sure its operating at peak ability. 3 PHASE MOTOR TESTING PROCEDURE The Patriot ,Mill Turn and Turnado machines are equipped with 3 phase motors. Each motor has 3 separate windings. The windings are marked with tags U-1 and U-2, V-1 and V-2, W-1 and W-2. In the running configuration, the windings are joined with metal jumpers. In

The most common failure mode of a 3 phase AC motor is burnt winding or shorted winding leading to the damage of the motor. Often it is required to test the winding of the 3 phase windings with the aid of a multimeter or ohmmeter to determine whether the motor is still good or burnt or shorted. Dc test for DC winding resistance. Open circuit and short circuit test for other components like transformer

MEASURE THE WINDING RESISTANCE OF A THREE-PHASE MOTOR WITH A RESISTANCE METER The measurement of the winding resistance in a running three-phase motor with the ELETTROTEST Resistance Meter requires some precautions since the single phases can influence each other reciprocally. Typically, a 2-channel resistance meter is used, with 3 inlets and 3 Here we are giving you only overview on 3 phases induction motor. 3 phase induction motor have 3 winding; assume U, V and W. Every winding has its own resistance. But all winding have same resistance. Total number of wire coming from motor are 6 i.e. U1, U2, V1, V2, W1 and W2. When these three winding are connected in STAR or DELTA connection

Routine Test of Three Phase Induction Motor Vishant Naik1, Saurabh K Singh2, Sahil Chawhan3, Jatin Wankhede4, 2.4 WINDING RESISTANCE TEST A typical 3-phase squirrel-cage motor has six connection leads in the electrical connection box for the three coils. If someone works with AC 3-phase motors, then it is important to know how to connect these motors in Star and Delta connection, and how 3 PHASE MOTOR TESTING PROCEDURE The Patriot ,Mill Turn and Turnado machines are equipped with 3 phase motors. Each motor has 3 separate windings. The windings are marked with tags U-1 and U-2, V-1 and V-2, W-1 and W-2. In the running configuration, the windings are joined with metal jumpers. In

3 PHASE MOTOR WINDINGS YouTube

3 phase motor winding resistance chart pdf

Column-by-Column Winding Resistance in Ohms Franklin AID. 4 2.2.5 Long period storage If the motor is not in operation for a long period (one week and above) after installation or has been in operation but stopped for a period of …, phase values for a BLDC motor. Brushless dc motors (BLDC) are 3 phase synchronous motors used in a configuration to be treated as dc drives. MOTOR RESISTANCE For the winding resistance use an ohmmeter. For a dc motor measure the resistance between the 2 armature wires. If it is a WYE connected BLDC motor, the resistance is the line-to-line.

How to Test a Three-Phase Motor With a Megger Hunker

3 phase motor winding resistance chart pdf

How to Calculate Motor Current With Winding Resistance. scale. Fig. 3 shows a typical scale, which reads increasing resistance values from left up to infinity, or a resistance too high to be measured. Figure 4–Typical record of insulation resistance of a mill motor. Curve A shows test values as measured; Curve B shows same values corrected to 20°C (see page 22), giving a definite downward https://en.m.wikipedia.org/wiki/Wound_rotor_motor It may not be possible, in my opinion. For the same KW rating, depending on the type of winding chosen and the SWG of wire selected, the winding resistance will vary. If you have access to the RTC (Routine Test certificate) of the manufacturer, yo....

3 phase motor winding resistance chart pdf

  • How to calculate the winding calculation of a 3 phase
  • How To Test Three Phase AC Motors ~ Learning Electrical
  • Three-Phase Dual-Voltage Motor Insulation Resistance Testing

  • If the motor is kept in a place with high humidity, a periodical inspection is necessary. It is practically impossible to determine rules for the actual minimum insulation resistance value of a motor because resistance varies according to method of construction, condition of insulation material used, rated voltage, size and type. Three phase scroll compressors only rotate in one direction. It is simple enough on a 3 phase scroll compressor to swap the location of T1 and T2 to reverse the rotation and check if it was wired to rotate in the wrong direction. In 3 phase reciprocating compressors, they can rotate in either direction with out any issues. Although, if the

    Figure 3 One method of detecting high resistance connections is by performing phase to phase resistance testing. On a three phase motor, the three resistance measurements should be nearly identical. If all three reading are exactly the same, there would be a 0% resistive imbalance. As one or more phases develop a high resistance the resistive Routine Test of Three Phase Induction Motor Vishant Naik1, Saurabh K Singh2, Sahil Chawhan3, Jatin Wankhede4, 2.4 WINDING RESISTANCE TEST A typical 3-phase squirrel-cage motor has six connection leads in the electrical connection box for the three coils. If someone works with AC 3-phase motors, then it is important to know how to connect these motors in Star and Delta connection, and how

    This post is about the single phase motor winding resistance testing with complete explanation. From this article you will learn about the single phase induction motor winding resistance, main winding, starting winding. And how to identify start, run and common in the winding. Rewinding 3 Phase Motor: Hello everyone, i am Niko and, in this instructables i will show you, how to rewind and renew old three phase electric motor.If you are searching for rewinding of one phase motor you can find it here.In this insctructables, i am going to make step...

    This post is about the single phase motor winding resistance testing with complete explanation. From this article you will learn about the single phase induction motor winding resistance, main winding, starting winding. And how to identify start, run and common in the winding. 4 2.2.5 Long period storage If the motor is not in operation for a long period (one week and above) after installation or has been in operation but stopped for a period of …

    Rewinding 3 Phase Motor: Hello everyone, i am Niko and, in this instructables i will show you, how to rewind and renew old three phase electric motor.If you are searching for rewinding of one phase motor you can find it here.In this insctructables, i am going to make step... Three-Phase Dual-Voltage Motor Insulation Resistance Testing Three-phase dual-voltage motors are used for most day-to-day operations in today’s industrial plants. These motors run conveyor belts, pumps, fans, and many other applications. Motors are susceptible to the gradual failure of their insulation resistance. The primary causes of insulation failure include: electrical stress (current

    This post is about the single phase motor winding resistance testing with complete explanation. From this article you will learn about the single phase induction motor winding resistance, main winding, starting winding. And how to identify start, run and common in the winding. 2 Fluke Corporation Three-phase motors 3. Disconnect the motor from the load. 4. After the load is disconnected, turn power ON to try restart-ing the motor. If the motor starts, check the load. 5. If the motor does not start, turn it OFF and lock out the power. 6. With an ohmmeter, check the motor windings for any opens or shorts. Take a resistance

    life of a three-phase stator winding can be shortened dramatically when the motor is exposed to unfavorable operating conditions - electrical , mechanical or environmental.The winding failures illustrated in this brochure are typical of what can happen in such circumstances. They are shown here to help in identifying the causes of It may not be possible, in my opinion. For the same KW rating, depending on the type of winding chosen and the SWG of wire selected, the winding resistance will vary. If you have access to the RTC (Routine Test certificate) of the manufacturer, yo...

    winding failure and possible causes,electric motor rewinds,illustrated guide to winding failures The photos below are typical winding failures in three phase stators. Along with the photo is a brief explanation of the cause of the problem. 3 PHASE MOTOR TESTING PROCEDURE The Patriot ,Mill Turn and Turnado machines are equipped with 3 phase motors. Each motor has 3 separate windings. The windings are marked with tags U-1 and U-2, V-1 and V-2, W-1 and W-2. In the running configuration, the windings are joined with metal jumpers. In

    15/03/2016В В· IN the Motor Winding end wire in 3 phase A1A2, B1B2, C1C2 connected thro RYB the motor will run But if any changes in the terminal connection A2A1 / B2B1 / C2C1 if the motor winding will get Abnormal heat. Further, pleas give the diagram for the How to identify the A1, A2 B1, B2,C1,C2 by using TEST LAMP METHOD 27/10/2010В В· just curious,but why do you want to know? i would say the winding resistance of a 15kw motor would be close to zero while on small motors you would get much higher, if checking look for 3 very similar readings. cant think of a calculation other than R=P/I^2 but dont think that would work for 3 phase where P=SQ RT3*V*A*PF, so in summary, sorry

    It may not be possible, in my opinion. For the same KW rating, depending on the type of winding chosen and the SWG of wire selected, the winding resistance will vary. If you have access to the RTC (Routine Test certificate) of the manufacturer, yo... AC Motor Winding Resistance Test Check the motor winding resistance or ohms reading using a multimeter or ohmmeter for phase to phase terminal ( U to V,V to W ,W to U ).The ohms reading for each winding must be the same (or nearly the same). Remember that the three phases have identical windings or nearly so! Insulation Resistance Test

    identified. If leads 1-2-3 and 5-4-6 are swapped, the motor will probably run on the high speed connection, but it will be noisy and the speed will be Identifying Unmarked Leads Of 6-Lead Motors With 1 Or 2 Windings Procedures Also Help Identify Type Of Connection When There Is No Nameplate Table 3. Resistance ratio of Variable Torque leads. I always megger a 3 phase 480V motor phase to ground, but I am wondering if meggering phase to phase can tell me something about the state of the winding insulation as well, and what kind of a reading I would be looking for considering the windings are "shorted" together.

    The induction motor is made up of the stator, or stationary windings, and the rotor. The stator consists of a series of wire windings of very low resistance permanently attached to the motor frame. As a voltage and a current is applied to the stator winding terminals, a magnetic field is developed in the windings. By the way the stator windings are arranged, the magnetic field appears to This post is about the single phase motor winding resistance testing with complete explanation. From this article you will learn about the single phase induction motor winding resistance, main winding, starting winding. And how to identify start, run and common in the winding.

    It may not be possible, in my opinion. For the same KW rating, depending on the type of winding chosen and the SWG of wire selected, the winding resistance will vary. If you have access to the RTC (Routine Test certificate) of the manufacturer, yo... 11/06/2011В В· It's been a very long time since I study days but I'm pretty sure when you measure the resistance across the windings of a motor it should be a low Ohm value not more than double digits?

    DEVELOPMENT DESIGN SPECIFICATION D3 STRUCTURES/BRIDGE DESIGN GENERAL D3.01 SCOPE 1. This section sets out design considerations to be adopted in the design of The AUSTROADS Bridge Design Code is the appropriate general reference for bridge proposals. 4. Council requires bridges to have low maintenance finishes; therefore timber and Austroads bridge design code pdf Canterbury The Bridge Design Code current at the time of the viaduct design was National Association of Australian State Road Authorities Highway Bridge Design Specification. This code has been since superseded in 1976 and the design code at the time of widening design was 1996 AUSTROADS Bridge Design Code.