Free Essay

The Power Line Poles

In:

Submitted By wewy
Words 913
Pages 4
THE POWER LINE POLES
If you were in the position of Gordon Yarrow how would you deal with the bid exceptions requested?
If I was Mr. Yarrow, I would request Henry Nelson Co. that several pre-award meetings are held to discuss the exceptions made with the goal of setting final agreements on these exceptions prior contracting the services. I would also make sure that these discussions are recorded as minutes of the meetings so that the document(s) can become an integral part of Henry Nelson’s quote and eventually included in the contract agreement. With regards to each of the exceptions requested (Exhibit 2), my comments are:
• Exception 1:
To handle this exception, Moren should request Henry Nelson and for that matter all bidders, to include in their quote a Jobsite delivery. Although most of the companies in the US are more familiar with the UCC transportation terms, Moren should request that the latest version of Incoterms (developed by the ICC) should be used as the applicable transportation terms of the contract. By enforcing the use of Incoterms, Moren may even specify that the quoted terms should be DDP-Jobsite which would indicate Henry Nelson and all other bidders that the supplier “must” carry the responsibility and risk of delivering the equipment to the jobsite by the requested date. With this in mind, Henry Nelson and other bidders should include as part of their cost estimate the costs for using DDP-Jobsite delivery terms. This way, the sales price to Moren is inclusive of this cost.
• Exception 2:
From experience, depending on the application and service, materials that are subject to low temperatures may require being compliant and certified according to the standards of the NACE International Institute. In such cases where a NACE certification is deemed necessary, charpy testing is then a requirement. So, to best handle this exception I would request the engineering department to re-review the specifications and determine based on the application and service of this particular project whether or not charpy testing is required.
• Exception 3:
The concern for the excessive bolt projection should be brought to the attention of all pole suppliers as they may pose a serious trip hazard to workers on the construction site. Again, both engineering departments at Moren and at Henry Nelson should seek for alternatives or for solutions on how to deal with such hazard. If Henry Nelson is ultimately selected as the preferred pole supplier, Moren will have to make sure they provide a workplace that is free of recognized hazards according to OSHA’s general duty clause.
• Exception 4 and 5:
Again, Moren’s engineering department should re-review the specifications requirements and confirm whether or not RT examinations are mandatory for this project. If RT examinations are mandatory, then I would suggest Henry Nelson and other pole suppliers to revise their quote and include any impact in price and delivery in their quote in order to accommodate this requirement. If Moren’s engineering department is OK with opting out from RT examinations, then Moren may negotiate with Henry Nelson for the inclusion of other NDE tests in lieu of the RT examination with no additional impact to the price or delivery. Also, Moren should negotiate with Henry Nelson that weld procedures need to be submitted to them for approval and that in the event of any major weld repairs, a dedicated weld repair procedure and weld map is submitted for review prior commencing the repair work.
• Exception 6:
To handle this exception, I would request assistance from Moren’s legal department. With large projects, it is assumed that deliveries of this kind of equipment are staggered in time. Also, once the equipment is received, Moren must undergo an installation and start-up phase which makes Henry Nelson’s 5-day claim requirement very unrealistic. Moren and Henry Nelson should re-negotiate the warranty clause while avoiding a Battle of the Forms.
• Escalation Clause:
Moren should not be made responsible for any 3rd party or consequential liabilities. Moren should negotiate and require Henry Nelson to remove should clause from their quote as it brings a tremendous unknown liability to Moren.
In conclusion, as with our last previous case submission, the early disqualification of bidders without carrying a proper pre-qualification review that is equal among all bidders is not a recommended practice. In this project, Mr. Yarrow counted with the technical support from a consulting engineering services firm and his own engineering department so it would have been more adequate if he permitted the technical review and un-priced bid comparison of all eight quotes received. By doing so, the team would have had a chance to select the most appropriate vendor that met Moren’s design and technical specifications.
By electing Henry Nelson Co. as the preferred pole supplier, Moren would inadvertently opt out from Moren’s design and specifications and instead would accept to proceed with a vendor that chooses to use unapproved manufacturing processes. For Moren, this may be a risky move as the complications that may come up during manufacturing, testing and inspection are yet unknown. If complications arise, the delivery of the poles may be affected which in turn affects the overall completion of the 1st phase of the project. Should Henry Nelson get selected, Moren may request them to provide an experience list of similar projects where a similar product was manufactured. This may give Moren an extra push of confidence for closing a deal with Henry Nelson.

Similar Documents

Free Essay

Long Flashover Arresters

...Stroke Indirect Stroke 5 What does lightning do?  Strikes live power line jumps across insulator to reach grounded tower. Lightning channel across insulator acts as conductor causing a short circuit. Man-made power from live wire flowing through section of old lightning channel in an intensely bright arc.   6 Lightning arresters  A device used on power systems above 1000 V to protect other equipment from lightning and switching surges Under normal operation the lightning arrester is off the line On the occurrence of over voltage air insulation across gap breaks down and arc is formed providing a low resistance path for the surge to the ground   7 Metal Oxide Lightning Arrester  The metal oxide varistor (MOV) contains a material, typically granular zinc oxide, that conducts current (shorts) when presented with a voltage above its rated voltage They exhibit an extremely high resistance during normal operation and a very low resistance during overvoltages 8  What are LFAs?  A new simple, effective and inexpensive system for lightning protection of overhead distribution lines  Pole Top Arresters LFAs Costly; Easily Destroyed Cheaper; Cannot be Destroyed 9 Need for LFAs  Prevent Damage to Power Lines by Lightning Strike  Enhance the Reliability Performance of power lines  Reduce Maintenance Costs of Power lines 10 How...

Words: 1145 - Pages: 5

Premium Essay

Mr Chan Ur

...rotating machine whose speed under steady state condition is proportional to the frequency of the current in its armature. The magnetic field created by the armature currents rotates at the same speed as that created by the field current on the rotor, which is rotating at the synchronous speed, and a steady torque results. Synchronous machines are commonly used as generators especially for large power systems, such as turbine generators and hydroelectric generators in the grid power supply. Because the rotor speed is proportional to the frequency of excitation, synchronous motors can be used in situations where constant speed drive is required. Since the reactive power generated by a synchronous machine can be adjusted by controlling the magnitude of the rotor field current, unloaded synchronous machines are also often installed in power systems solely for power factor correction or for control of reactive kVA flow. Such machines, known as synchronous condensers, may be more economical in the large sizes than static capacitors. With power electronic variable voltage variable frequency (VVVF) power supplies, synchronous motors, especially those with permanent magnet rotors, are widely used for variable speed drives. If the stator excitation of a permanent magnet motor is controlled by its rotor position such that the stator field is always 90o (electrical) ahead of the rotor, the motor performance can be very close to the conventional brushed dc motors, which is very much favored for...

Words: 6536 - Pages: 27

Free Essay

Importance of Socioloy to Communication

... 7. Conclusion N/B: Safety Precaution must be minimum of four PART 1 SYNCHRONOUS MACHINE 1.1 INTRODUCTION A synchronous machine is an a.c machine in which the rotor moves at a speed which bears a constant relationship to the frequency of currents, in the armature winding. A synchronous machine is one of the important type of electric machines. Large a.c networks operating at constant frequency of 50Hz rely almost exclusively on synchronous generators, also called the alternators, for the supply of electrical energy. Private, stand-by and peak load plants with diesel or gas-turbine prime movers also have synchronous generators. Synchronous motors provide constant speed industrial drives with the possibility of power factor correction. Synchronous machine are generally constructed in larger sizes. Small size alternators are not economical. The modern trend is to build alternators of very large size capable of generating 500MVA or even more. The synchronous motor is rarely built in small sizes owing to superior performance characteristics and economical construction of induction motors. 1.2 OPERATING PRINCIPLE The operating principle of a synchronous machine is fundamentally the same as that of a d.c machine, but, unlike the latter, in the synchronous machine there is no need to rectify the time varying e.m.f which is induced in the armature winding. Consequently a synchronous machine does not require a commutator. It is in fact quite possible...

Words: 5432 - Pages: 22

Premium Essay

Induction Motors

...Machines & Power Systems (EPM1076) Chapter 4c Synchronous Machines Objectives: In this chapter the following topics will be discussed.  Introduction to synchronous generator  Construction details  Principle of operation and emf equation  Equivalent circuit and voltage regulation  Short-circuit and open-circuit tests  Parallel operation  Synchronizing procedures Chapter IV EPM1076 2 Introduction to Synchronous Machines A synchronous machine is an ac rotating machine whose speed under steady state condition is proportional to the frequency of the current in its armature. The magnetic field created by the armature currents rotates at the same speed as that created by the field current on the rotor, which is rotating at the synchronous speed and a steady torque. Synchronous machines are commonly used as generators especially for large power systems, such as turbine generators and hydroelectric generators in the grid power supply. Because the rotor speed is proportional to the frequency of excitation, synchronous motors can be used in situations where constant speed drive is required. Chapter IV EPM1076 3 Chapter IV EPM1076 4 Angle in Electrical and Mechanical Unit -For 2 pole machine, when the rotor rotates for one revolution, the induce emf varies for one cycle. i.e. θ = θm, (refer to figure 2) -Where θ is the angle in electrical degrees or radians and θm is the mechanical angle. - For a 4 pole machine...

Words: 2662 - Pages: 11

Free Essay

Five Phase Induction Motor

...sanketbhimgade@gmail.com , 2swapnil.28492@gmail.com , 3roshan.durge16@gmail.com , 4pawhrohnei@gmail.com , 1 Abstract: The conversion of electrical energy into mechanical energy has been and continuous to be a dominant form of power transmission for industrial purposes. The alternating current (AC) electric induction motor has been an industry workhouse for electromechanical conversion for over 100 years. This paper introduces the fundamental electric and mechanical principles of 5 phase AC induction motor. In this paper, a generalized formula is proposed for the selection of number of slots required for 5-phase alternative current (AC) machine design and the criterion for selecting the starting points of each phases. Keywords: Induction motor. Five phase, Stator winding. current. The power per phase is P = VP IP cosϕ and the total power is the sum of the amount of power in each phase. If the currents are equal and the phase angles are the same as in Fig. 1, then the load on the system is balanced, the current in the neutral is zero and the total power is [1], =3 cos ∅ Or Or = √3 = 1.73 cos ∅ cos ∅ I. INTRODUCTION In general, the induction machines having three-phase windings are normally used, since the standard power supply is three phase. However, when fed by an inverter, there is no need for a fixed number of phases, some other phases being possible and advantageous. A multiphase machine can operate normally after loss of one or more ...

Words: 3545 - Pages: 15

Premium Essay

Motor

...Chapter 1 INTRODUCTION 1.1 Background of the Study A synchronous electric motor is an AC motor distinguished by a rotor spinning with coils passing magnets at the same rate as the power supply frequency and resulting rotating magnetic field which drives it. Another way of saying this is that it does not rely on slip under usual operating conditions and as a result, produces torque at synchronous speed. Synchronous motors can be contrasted with an induction, which must slip in order to produce torque. They operate synchronously with line frequency. As with squirrel-cage induction motors, speed is determined by the number of pairs of poles and the line frequency. Synchronous motors are available in sub-fractional self-excited sizes to high-horsepower direct-current excited industrial sizes. In the fractional horsepower range, most synchronous motors are used where precise constant speed is required. In high-horsepower industrial sizes, the synchronous motor provides two important functions. First, it is a highly efficient means of converting ac energy to work. Second, it can operate at leading or unity power factor and thereby provide power-factor correction. The operation of a synchronous motor is simple to imagine. The armature winding, when excited by a poly-phase (usually 3-phase) supply, creates a rotating magnetic field inside the motor. The field winding, which acts as a permanent magnet, simply locks in with the rotating magnetic field and rotates along with...

Words: 3243 - Pages: 13

Premium Essay

Electric Current Case Report

...Since the aircraft battery has a short-term power shortage capability, the AC generator is needed as to provide back-up power for the aircraft. Main advantage of AC power is that it can operate at a higher voltage as compared to DC power which are usually limited to around 400W to 12kW. In the transmission of AC power, it is important that high voltages are produced so as lower current will be produced and this leads to lower losses. This means that by lowering the current saves weight as heavy current conductors can be eliminated and this is a very important consideration for an aircraft...

Words: 2647 - Pages: 11

Premium Essay

Ohms Law

...OHM’s Law Although there are literally thousands of formulas, I only try to remember two: Ohm's Law and the Power Formula. You can deal with most anything built before 1980 (except radio and TV) with these two formulas. The first, Ohm's law, states that E = I x R  (Or, electromotive force in volts = intensity in amps, times the resistance). So those of you that are good at math games already know that we can change it to read R = E/I or I = E/R. That first class back in the sixties taught it as a magic circle, with E over I x R and you just took the one you wanted to know out of the circle and did what was left . I.e. If you want to know amps, you take the I out which leaves E/R, so you divide the volts by the resistance to find the amps. The power formula states that P = E x I or Power (in Watts) = Volts times Amps. It can also be remembered as a magic circle.Simply plug the resistance that you measure in to Ohm's Law and solve. More on this later -  I’m getting ahead of my self. You may see these written with different symbols, depending upon when a book was written, but this is the way it was taught when my Scout was new. We will get back to formulas later. Now I want to go into electricity’s alter ego.    | Ohm's Law:  E = I x RPower Formula:  P = E x I     Magic triangle or circle  (click for full-size view with   comments) | Magnetism is the force possessed by some materials which enables them to attract or repel certain other materials. Magnets fall into...

Words: 635 - Pages: 3

Premium Essay

Maglev Train

...How works a Maglev train? A brief review of magnets will help explain how maglev (magnetic levitation) trains work. Every magnet has a north pole and a south pole. Similar poles of two magnets repel each other; opposite poles attract each other. These principles govern the levitation of maglev trains. Permanent magnets are always magnetic. Electromagnets are magnetic only when an electric current flows through them. The north and south poles of an electromagnet are related to the direction of the current. If the direction of the current is reversed, the poles are reversed. In maglevs that levitate by magnetic repulsion, the train lies over the guideway. Magnets on top of the guideway are oriented to repel similar poles of magnets in the bottom of the maglev. This pushes the train upward into a hovering position. This system is designed for maglevs that contain groups of extremely powerful superconducting electromagnets. These magnets use less electricity than conventional electromagnets, but they must be cooled to very low temperatures—from −269 degrees Celsius to −196 degrees Celsius. In maglevs that levitate by magnetic attraction, the bottom of the train wraps around the guideway. Levitation magnets on the underside of the guideway are positioned to attract the opposite poles of magnets on the wraparound section of the maglev. This raises the train off the track. The magnets in the guideway attract the wraparound section only strongly enough to raise the train a few centimeters...

Words: 1563 - Pages: 7

Premium Essay

Collins

...peak-inverse-voltage of thyristor is 339.4 V; Peak-inverse-voltage of the diode is 339.4 V) V mean ={(120√2)/π}* (1+ cosα) Hence 2/π 240√2 cos α 76.39*1.41 cos 0 =107.71 2/π 240√2 cos α 76.39* √(2 cos 90 - =54 2/π 240√2 cos α -2 76.39*1.41 cos 180 = 0 Peak voltage across each thyristor: Vmax= 240√2 = 339.41112 3. A load of 10 Ω resistance, 0.1 H inductance, is supplied from a 7.07 V (rms), 50 Hz ac supply via a thyristor controlled single phase half wave rectifier using a commutating diode. If the thyristor is fired at a delay angle of 90 degrees, determine by a graphical method the waveform of the current during the first two cycles of operation. Neglect device volt-drops. INDUCTION MOTORS 1. A 3 φ 4 pole 50 hz induction motor runs at 1460 r.p.m. find its %age slip. (2.6 %) 2. A 12...

Words: 819 - Pages: 4

Premium Essay

Drive Application Engineering

...Table of Contents Section 1 – Motor and Load Basics.................................................................................................... 9 AC Motors........................................................................................................................................... 11 NEMA Design Types........................................................................................................................ 12 Motor Synchronous Speed............................................................................................................... 12 3-Phase Motor Connections - NEMA ............................................................................................... 13 Rotor Inertia – NEMA....................................................................................................................... 16 3-Phase Motor Connections – IEC Nomenclature............................................................................ 17 Rotor Inertia – IEC ........................................................................................................................... 18 AC Motor Operation above Base Speed .......................................................................................... 19 Synchronous Motors ........................................................................................................................ 20 Wound Rotor........................................................................................

Words: 7023 - Pages: 29

Premium Essay

Stepper Motor Working

...the amount of current sent to the stator and the number of turns in the windings. The stepper motor uses the theory of operation for magnets to make the motor shaft turn a precise distance when a pulse of electricity is provided. You learned previously that like poles of a magnet repel and unlike poles attract. Figure 1 shows a typical cross-sectional view of the rotor and stator of a stepper motor. From this diagram you can see that the stator (stationary winding) has eight poles, and the rotor has six poles (three complete magnets). The rotor will require 24 pulses of electricity to move the 24 steps to make one complete revolution. Another way to say this is that the rotor will move precisely 15° for each pulse of electricity that the motor receives. The number of degrees the rotor will turn when a pulse of electricity is delivered to the motor can be calculated by dividing the number of degrees in one revolution of the shaft (360°) by the number of poles (north and south) in the rotor. In this stepper motor 360° is divided by 24 to get 15°. When no power is applied to the motor, the residual magnetism in the rotor magnets will cause the rotor to detent or align one set of its magnetic poles with the magnetic poles of...

Words: 3808 - Pages: 16

Premium Essay

Engineer

...auxiliary power system INTRODUCTION The auxiliary power system of the AC-traction, 4400 HP, Evolution® Series locomotive provides the electrical power that is required to operate all of the locomotive systems that we have learned about in the previous modules of this class. It also provides power for some equipment that will be described in this module for the first time. This module will introduce you to the auxiliary power system components and circuits. These include the auxiliary alternator, alternator excitation circuits, the battery charging circuit, and the auxiliary motor supply circuits. Sections Section 1: Auxiliary alternator Section 2: Alternator excitation circuits Section 3: Battery charging circuit Section 4: Auxiliary motor supply – cycle skipper circuits Section 5: Auxiliary motor supply – direct drive circuits Section 6: Auxiliary motor supply – contactor controlled circuits Objectives By the end of this module, you should: • Recognize the auxiliary alternator and understand how it works • Know the components of the traction and auxiliary alternator excitation circuits and understand how they operate • Know the components of the battery charger circuit and understand how they operate • Know the components...

Words: 5913 - Pages: 24

Premium Essay

Maglev Train

....INTRODUCTION Magnetic levitation is the latest in transportation technology and has been the interest of many countries around the world. The idea has been around since 1904 when Robert Goddard, an American Rocket scientist, created a theory that trains could be lifted off the tracks by the use of electromagnetic rails. Many assumptions and ideas were brought about throughout the following years, but it was not until the 1970’s that Japan and Germany showed interest in it and began researching and designing. The motion of the Maglev train is based purely on magnetism and magnetic fields. This magnetic field is produced by using high-powered electromagnets. By using magnetic fields, the Maglev train can be levitated above its track, or guideway, and propelled forward. Wheels, contact with the track, and moving parts are eliminated on the Maglev train, allowing the Maglev train to essentially move on air without friction. [pic] FIGURE[1] BASIC PRINCIPLE OF MAGLEV TRAIN Maglev can be used for both low and high speed transportation. The low speed Maglev is used for short distance travel. Birmingham, England used this low speed transportation between the years of 1984 and 1995. However, engineers are more interested in creating the high-speed Maglev vehicles. The higher speed vehicle can travel at speeds of nearly 343mph or 552 km/h. Magnetic Levitation mainly uses two different types of suspension, which are Electromagnetic...

Words: 4370 - Pages: 18

Free Essay

Geo Chapter One Notes

...1102 Chapter 1 (Some Essentials of Geography) Location and Time on the Earth. Location on the Earth: Latitude and Longitude. Latitude. • Lines of Latitude measure angle distances from the Equator north and south. • 0 degrees Latitude is the equator, and 90 degrees is the North and South poles. • Lines of latitude are also called Parallels, because they never meet or cross each other. • Minneapolis lies almost exactly half-way between the Equator and the North Pole (45 degrees north latitude). Longitude • Lines of longitude measure angle distance east or west of the Prime Meridian. This is a line running north and south from Greenwich, England’s Naval Observatory. This line is known as 0 degrees longitude. • Lines of longitude are also known as Meridians. They are furthest apart at the equator and meet at the north and south poles. • Opposite the world from the Prime Meridian is the International Date Line. This line usually represents 180 degrees longitude (both east and west). • Many Countries fought to have the Prime Meridian run through their own capital cities. o French maps showed the prime meridian running through Paris. Americans ran it through Washington D.C. and the Italians through Rome. o Great Britain won the honor because it was the greatest sea power at the time. o Eventually the other countries were forced to recognize this decision, although Italy still kept Rome as the Prime Meridian...

Words: 453 - Pages: 2