Mitsubishi Pajero Specification & Interior

Mitsubishi Pajero Specification & Interior

The Mitsubishi Pajero was imported by Mitsubishi by its associate Hindustan Motors in Indian SUV marketplace in March 2002. In the first period the car was imported as totally built unit. The automobile has been known a facelift plus is now obtainable as Mitsubishi Pajero. The automobile is obtainable in single alternative in the country.

Mitsubishi Security Feature:
The automobile has front region that takes care of any minor collisions. The brake scheme of the car has superior technology features plus this ensures that the car can stop effortlessly. The steering wheel of the automobile collapses in case of any accidents plus this ensures that any wound to the driver is minimized as far as probable. The other safety features in the automobile comprise 2 airbags, fog light, parking sensors, anti lock brake system, electronic stability program and electronic brake force sharing feature.

Mitsubishi Pajero Specification:
The car is obtainable in India with 2835cc, 8 cylinder diesel trains with SOHC feature. This engine can bring power of 117 bhp at 4000 rpm along by torque of 292 Nm at 2000 rpm. The car has 5-speed physical transmission plus this offers smooth shifting of mechanism. The suspension scheme of the car includes twice wishbone setup for the face while the rear has 3-link coil spring.

The deferral system of the car provides a great deal needed stability to the car plus the car does not knowledge body roll problems at high speeds. The body of the car is physically powerful plus can suit the stress of rugged terrain well. The length of the automobile is 4755mm plus its width is 1775mm as its height is 1900mm. The automobile has tilt steering along with face disk and back drum brake system. The car has ground approval of 205mm and its kerb weight is 2155 kg. The car has a petroleum tank ability of 92 liters.

Mitsubishi Pajero Interiors:
The car has a strong body and male look. The interiors of the car are roomy and come in double colors. The car has body colored headrests plus on the whole the interiors are well intended and practical. The car is right for off road conditions plus so the leather seats are efficiently bolstered for that reason. The steering wheel is wrapped in leather plus is four spoke. The first as well as second row seats have exclusive looking cup holders plus hand rests. The air vents are there for all rows so as to make sure that uniform temperature is maintained. The drivers seat can be attuned for height plus also has lumbar adjusting facility. The second as well as third row seats in the car are able to be folded to make space for bags. The car has normal music scheme along by MP3 CD player plus tuner.

Challenges Of Medical Device Service Industry

The worldwide market for service providers serving the medical consultation needs has been found increasing in five years. They help in getting the small and large devices registered belonging to categories like Imaging and Navigation systems, Combination Devices, Diagnostic Software Energy emitting technology, Diabetic Products, Surgical Disposables and much more.
In serving the manufacturers, the medical device service providers face several challenges which will be discussed in this article.
Workflow management
The kind of work, done by whom and in what sequence is something which come under the workflow management. Different departments and members are specified for different kinds of work related to medical device services. The problem may occur due to any obstruction in any department. Different stages of devices lifecycle need to g through different kinds of services. It is Important to deal different phases of devices like composition, quality, size, purpose, etc.
Technical assistance
Different kinds of technical staff and experts look after different technical aspects of the devices. Moreover, the technical assistance team is also comprised of experts like clinical researchers and quality assurance managers to deal the specific aspect. They have multi-disciplinary knowledge to check different effectiveness and quality aspects of the devices. With the help of enough quality assurance experience, they manage to check out technical aspects of the devices successfully. They go through multi-stage interview process to declare the effectiveness and safety level of devices in medical industry.
Compliance and regulatory issues
Different formalities are needed to be fulfilled to make sure the devices are ideal to get authorized by regulatory bodies. Moreover, it is essential to mention the right category, purpose, effectiveness, working principle, quality, composition and much more. Without actual information and quality test reports, it is complicated for medical device service providers to receive authorization of regulatory bodies.
Regulatory strategy for most advanced and complex devices will be found different with the firms and thus the firms work in the way to get the authorization easily after fulfilling all formalities.
From the above discussions, it can be said that all the challenges like workflow management, technical assistance and regulatory issues are needed to meet properly to serve the medical device manufacturers with authorization and market approvals for small or large devices on time.

Scangauge And Sutticar Help You Monitor Fuel Economy

The Scangauge Automotive Computer is a handy and easy to install gadget for any vehicle that is a 1996 model or newer. Its main function is to examine the functions of your car or trucks engine but it also acts as a trip computer and fuel economy monitor.

Mounted below, above, or on the dash of your car the Scangauge allows you to watch the distance you are traveling along with the average speed of your vehicle and the number of miles per gallon you are getting as you drive. It features an easy to read and user friendly screen with an on-screen menu interface. Whenever you fill up your tank youll be able to input into the Scangauge the number of gallons you put in along with the price per gallon that you paid. As you drive this handy gadget automatically updates and displays the fuel efficiency according to the miles per hour and RPMs of your vehicle.

By knowing this information you will have the needed knowledge to help you adjust your driving to get the maximum fuel efficiency. Quick acceleration and rapid stopping can affect fuel use in negative ways, but the Scangauge will show you just how much fuel you are using. In turn you can see when you are getting the best fuel efficiency and drive that way more often.

The Scangauge also keeps track of the temperature of your engine, the battery voltage and can scan for trouble codes. Well maintained vehicles that are running correctly are also known to get better gas mileage. If you feel that something is not functioning correctly the Automotive Computer will scan every aspect of the engine via the OBD-II connector under the hood and tell you exactly what is wrong.

Another gadget to help with the inconsistent speeds in your driving is the Sutticar Fuel Saver. Not quite as high-tech as the Scangauge, the Sutticar helps you monitor and change your driving habits using a simple device that is placed under the gas pedal of any vehicle.

The Sutticar Fuel Saver is also extremely easy to install and can be done in just a few minutes without using any tools. The device under the gas pedal creates a counter pressure so whenever you press the gas it forces you accelerate more smoothly. In unusual circumstances the Sutticar will allow you to accelerate rapidly, but in normal driving conditions it keeps your acceleration steady. By accelerating smoothly and then reaching and maintaining an even speed, you are using less fuel.

By using either of these handy and innovative devices you will be able to monitor more closely and consider how you can make your driving habits more economical. With regular use of either one you should see an improvement in your vehicles fuel usage by ten to twenty five percent.

Utility Trailers Best For Any Type Of Transport

Utility trailers are the best tool which is a non-motorized which can be attached to any type of vehicle. This helpful accessory helps you move thousands of pounds without putting any overload upon your compact or midsize vehicle. Simply put a utility trailer is any type of non motorized trailer that attaches to your vehicle so that you can transport whatever you want to do so. It can be either enclosed or open. They can be large or small; and they can be simple or styled to match your towing vehicle.
There are some of the uses of these non-motorized vehicles which make it very useful for every small need for transporting anything at anyplace. These uses are as follows:
1. If you are water sport loving person and have a boat you need to have a utility trailer for getting you boat to and from your house or the place where you have kept the boat if there are no place to keep the boat near the beach.
2. If you furniture dealer or you are shifting your house from one part of the city or state to the other parts, you can use utility trailers for shifting the goods with ease as it is far more convenient and spacious then the pickup trucks.
3. For transport the electrical appliances or another type of appliances it needs to be in utility trailers for hauling appliances and careful transport.
4. When you have clean you whole house, backyard and the gardens there is always going to be loads of garbage and trash. Now dumping those garbage and trash is bigger problem than cleaning the house. Using the utility trailers for dumping the trash rather than pickup or you beloved SUV can be very useful.
5. For the people engaged in the livestock business transportation of the animals is required continuously and enclosed type will do wonders for them rather than a tempo or an open truck. The safety of the animals is always maintained.
6. If you are race loving person and good rider you regularly have to transfer you sport bike or dirt bike or you racing vehicle here and there now and then. These vehicle scan be transported with ease.
7. If you are decorating your own house than no need to hire a truck and roam in the market. Just take the trailer collect your good and you will come to know that you have saved a good amount of delivery charges.
If you pay enough close consideration to the specific features of each utility trailer will certainly aid you to successfully be able to choose the right solution for your truck. You can find these utility trailers in Savannah and more truck accessories and post free ads for utility trailers for sale in free Savannah classifieds.

Pc Universal 4 Digits Post Diagnostic Test Card Analyzer For Mini Pci/lpt

This POST card is adapted to Mini-PCI bus which will work without input from PCI clock. The Mini-PCI bus is used for laptop motherboards. Motherboard Diagnostic Card, also known as a POST Card (Power on Self Test), is used to test and diagnose motherboard problems. Laptop Diagnostic Card is a powerful diagnostic tool for technicians and administrators to troubleshoot various problems of compatible laptops by using the 25 pin parallel printer port (LPT) and USB port (for power) or most laptops using the miniPCI slot. With this card in hand, you no longer have to go through tedious and time consuming process of trying to figure out what is wrong with your hardware. Laptop Diagnostic Card will indicate exactly what is wrong with your laptop in just seconds. Order it from our computer gadgets store at:

http://www.szprice.com/products/Laptop-PC-Universal-4-Digits-POST-Diagnostic-Test-Card-Analyzer-for-MINI-PCI-LPT_2799.html

Features:

Adapts to Mini-PCI bus, will work without input from PCI clock
Mini-PCI bus is for laptop motherboards
Output from PRINTER PORT (need connect to USB port for power)
Displays 4 digits POST code
Compact design for easy plug in/out

Notes:

Your PC or Laptop may not support POST CODES from the printer port. Please check with PC or Laptop vendor before you purchase!
Most all laptop vendors have supported POST 80 from ISA and PCI slot since the inception of the laptop novelty, long before they introduced POST 80 codes into the printer port. Generally youre looking at a time frame of laptops now-a-days only about one year old that support this new feature of being able to give you diagnostic information in the form of POST 80 from the printer port.
If your laptop is older than one year old, youre stuck using the MINI-PCI method. Which involves opening the laptop case? For obvious reasons the laptop vendors seen a need to include POST 80 codes out the printer port but its newer technology is not support in most all older laptops.
Even though the board successfully BOOTS and you still see a HEX CODE, which does not mean your board is broken.
The HEX codes display the LAST ACTION of the bios. If the last thing the BIOS told the motherboard to do was turn on the keyboard interface, then that HEX will remain on the LED readout.

Package Includes:
1 x Laptop Test Card
1 x USB Cable
1 x Users

Rust Bullet’s Car Paint

Are you the owner of a beautiful car? Are you worried that the exposure to the cruel weather will spoil its sparkling beauty and the ugly rust will leave its scar on it? Rust Bullet’s car paint is our solution to your cars rust problem, just use our special a href=”http://www.rustbullet.com/EngineeringData/engData.htm”>rust paint.

Rust Bullet’s Car Paint
Rust Bullet’s Car Paint takes care of your cars a href=”http://www.rustbullet.com/ProductCart/pc/mainIndex.asp”>rust repair and your cars rust protection worries. The product has many advantages over other car paints available in the market; some of Rust Bullets advantages are:

A one step process
Rust Bullet provides you with a car paint that you can apply on rusty or clean car surfaces
This particular auto paint requires little or no prior surface preparation and can be applied directly on the cars roughened up surface.
Rust Bullet is scientifically tested and proven to be the best choice in the market place today. It clearly beats the market leaders POR15 and Rustoleum in performance durability and ease of application.
The car paint provided by Rust Bullet is also UV resistant the sun will not harm it.

The Rust Bullet’s Car Paint is very easy to apply and maintain. You simply roll, brush or spray the car paint onto the rusted areas. The process of using this product is very simple:
Remove the loose rust and large flakes by wire brushing the affected areas.
Then apply the paint.
The paint penetrates the surface and the resin solidifies to form a tough armor like coating
The second coat covers any pin holes in the first coat and forms bullet proof type layer that is non-penetrable thus protecting the surface for many years.
If somehow the paint is scratched or is damaged, maintenance is easy – just reapply the paint to prevent rust from forming.
The products from Rust Bullet are high quality products that are thoroughly tested by International labs. These Labs have reinforced the claims made by the company that the product is the best product available in today’s market place. Rust Bullet has received a dual patent from the United States Patent and Trademark Office something no other company in this field has ever accomplished. The rust bullet products save you the worry of protecting your car from rust and maintaining it year after year. You just have to apply it and forget about rust or rust prevention.

An Easy Way To Optimize Your Business

Since the beginning of the industrial revolution, people have sought ways to produce cheaper, faster, more efficient ways. Henry Ford was a great idea with assembly lines and innovations such continues today. Although it cannot get the publicity of the assembly line, point of sale software has the potential to revolutionize your retail chain in much the same way as the assembly line revolutionized Ford Motor Company. Upgrading to the point of sale is an easy decision, but very rewarding to help get your business into the red or keep in the dark.

One of the biggest advantages of point of sale software inventory management software is a part. You can be sure that you know how much of each product on the shelves or in their room inventory. Guess, when ordered, or what space is left. This eliminates several types of economic waste. If you always have the right amount of inventory, you can cut a smaller shop. It is not accidental for 30 additional products and be locked dilemma need a place to store them. The software automatically creates a sales order invoice, which includes all the elements that have been depleted or near exhaustion. This will save you a lot of time and as we all know, time is money.

Perhaps you have a small number of chains of retail stores, say 5, and is having trouble keeping an eye on all five at once. Obviously, a person cannot be in five places at once, but the point of sale software, which need not be. Daily reports and schedules can even be accessed online from anywhere in the world. Using Software as a Service (SaaS) can get real-time reports from any location over any connection. In this sense, it is not necessary to spend precious money, traveling between the stores and try to determine which store you really need more help. With the click of a button, you will know what store that works best in every moment of the day morning, noon and night. Hosted software enables quick and easy access to all critical business documents, regardless of location.

Another way that your company can be optimized is the convenience of a bar code scanner, which is a tool that is compatible with almost all the systems point of sales software. This greatly reduces the amount of work required by the law of your retail chain. Upon receipt of shipments scanned hosted SaaS software point of sale and the central server will do the rest to keep track of inventory numbers. This also simplifies the sales process and keeps track of each sale more accurate. Your employees no longer need to manually enter the price of each product. This improvement enables better customer service that generates goodwill with your customers and increase sales up. Point of Sale Software helps optimize, organize and easily improve your business.

How To Remove Old Linoleum

Are you thinking about removing linoleum in your home? It’s not easy, but doable. Removing linoleum from your home can be quite a task, a lot of it depends on how old the linoleum is, and the kind of adhesive that was used to fasten it down. Sometimes, if it’s solidly bound, and not cracking or heaving, people decide to leave it underneath whatever else they are laying down. Nonetheless, most home owners choose to start from scratch, and that means a lot of elbow grease, no matter which method of removal you decide on.

In a perfect world, the linoleum and adhesive would lift together. Unfortunately, that’s just not likely. You won’t know what’s in store until you remove the initial layer of linoleum. If the underlying floor is made of concrete it can be relatively easy to remove the old adhesive. Wood floors, however, present a much bigger challenge. Most people use paint scrapers or razor blades to remove the old adhesive. This is fine on concrete, but wood floors require a gentle touch. Old adhesive can hard enough to damage blades and scrapers, so be prepared to stock up.

Don’t try to remove everything at once. Instead, try cutting the linoleum into strips or sections, and peeling them away. You should be able to remove most of the surface layer and a good portion of the linoleum backing. Using this method also makes it a lot easier to get at the underlying adhesive.

After the top layer is taken up and you’re down to scraps, you have options for removing the adhesive. Chemical solvents such as Krud Kutter can be effective. Research these products and read the customer reviews. Follow the instructions on the product label carefully, and wear protective gloves and a mask. Work with a small area at a time and take a breath of fresh air before moving to the next.

Some home renovators have had success using boiling water to soften the adhesive. Working one section at a time, pour the water directly onto the backing and adhesive. Leave it to soak, and then scrape up the softened debris. Another option is to lay a folded towel over the adhesive, pour the boiling water, let it set and then begin scraping.

One method that may help you remove linoleum, then, is to heat it. Select a very inconspicuous area, such as behind a door, to try it. Heat the adhesive with a hair dryer and scrape it up with a straight-blade scraper (such as a stiff putty knife with a beveled edge). Push the scraper in the direction of the grain of the wood if you are uncovering a hardwood floor. Keep a pan or some other container handy to drop the scrapings into — one that is unlikely to either melt or ignite when coming in contact with hot materials.

A heat gun can be a great tool in removing old linoleum adhesive. You’ll need to be careful not to scorch or char the wood. It’s also important to know that this method can cause softened adhesive or mastic to creep into any of the natural crevices and the cracks between floorboards. Work a very small area, with a constantly moving heat source. Scrape as quickly as possible for best results.

It’s almost impossible to remove every bit of old adhesive from a hardwood floor, and excessive scraping will most certainly damage the wood. Remove as much as the adhesive as you can by using these methods, and then clean the floors. Take a look and consider your nest step. A light sanding may be in order, or you can try scrubbing the remaining residue away with rags and solvent. Turpentine and mineral spirits can get the job done. If you’re planning to lay a new covering over your cleaned wood floor, do yourself a big favor and remember to seal the wood before applying the new adhesive.

Nissan Obd Check Engine Light Fault Codes

“Have you ever had the red check engine light illuminate on your dash? You wouldnt be the first one. This is a little worrying when youre on the freeway and have no place to stop. Then there is the stress of imagining what the mechanics bills would be like.

Here is a simple guide to finding out whats caused the check engine light to come on, so you know whats going on before you see your mechanic. You may be able to identify and fix the problem yourself.

This is the procedure for checking the check engine light fault codes for Nissans 1990-2000 that have the Nissan OBD (consult) system installed. For a complete list of compatible cables go to http://www.blazt.biz/information/cars.php.

Step 1:
Locate the ECU. In most models its underneath the kickboard in front of the front passenger seat. There is a knob or switch on the side marked diagnostics that has an LED next to it.
Turn this knob clockwise (or to the on position).

Step 2:
Note the amount of flashes shown by the LED. This is the check engine light fault code. There may be several codes, but they are easily interpreted. There will be a sequence of flashes, the long flashes (0.6sec each) represent the 10s column, and the short flashes (0.3sec each) represent the 1s. For example if you got 2 long flashes followed by one short flash then you would have a code of 21 (ignition fault). If you have more than one fault then the next fault code in sequence will show.

Step 3:
Turn the diagnostics knob anticlockwise or off and note the fault code table below.

Nissan check engine light fault codes
11 Crank Angle Sensor/Camshaft Position Sensor.
12 Air Flow Meter/Mass Air Flow Sensor.
13 Engine Coolant Temperature Sensor.
14 Vehicle Speed Sensor.
21 Ignition Signal.
22 Fuel Pump.
23 Idle Switch.
24 Throttle Valve Switch.
25 Idle Speed Control Valve.
28 Cooling Fan Circuit.
31 ECM.
32 EGR Function.
33 Heated Oxygen Sensor.
34 Knock Sensor.
35 Exhaust Gas Temperature Sensor.
36 EGR Control-Back Pressure Transducer.
37 Knock Sensor.
38 Right hand bank Closed Loop (B2).
41 Intake Air Temperature Sensor.
42 Fuel Temperature Sensor.
43 Throttle Position Sensor.
44 ECCS Normal Operation.
45 Injector Leak.
47 Crankshaft Position Sensor.
51 Injector Circuit.
53 Oxygen Sensor.
54 A/T Control.
55 No Malfunction.
63 No. 6 Cylinder Misfire.
64 No. 5 Cylinder Misfire.
65 No. 4 Cylinder Misfire.
66 No. 3 Cylinder Misfire.
67 No. 2 Cylinder Misfire.
68 No. 1 Cylinder Misfire.
71 Random Misfire.
72 TWC Function right hand bank.
73 TWC Function right hand bank.
76 Fuel Injection System Function right hand bank.
77 Rear Heated Oxygen Sensor Circuit.
82 Crankshaft Position Sensor.
84 A/T Diagnosis Communication Line.
85 VTC Solenoid Valve Circuit.
86 Fuel Injection System Function right hand bank.
87 Canister Control Solenoid Valve Circuit.
91 Front Heated Oxygen Sensor Heater Circuit right hand bank.
94 TCC Solenoid Valve.
95 Crankshaft Position Sensor.
98 Engine Coolant Temperature Sensor.
101 Front Heated Oxygen Sensor Heater Circuit right hand bank.
103 Park/Neutral Position Switch Circuit.
105 EGR and EGR Canister Control Solenoid Valve Circuit.
108 Canister Purge Control Valve Circuit

To make things easy blaZt have a cable and software package that does all this for you and takes the worry out of the check engine light. Simply plug the cable into your standard diagnostics port, the other end into your computer and press connect. One click on download fault codes will tell you what the problem is. Products are in stock and cost less than one trip to the mechanic. Priced from . You cant afford to be without one, it will pay for itself in the first use. Go to www.blazt.biz for more info.
”

How A Ups Works

There are several categories of static UPS systems available. Broadly speaking, UPS Modules fall within one of three operational design architectures, namely off-line, line interactive and on-line.

However, irrespective of their individual design criteria certain features are common to all forms of static UPS systems – i.e., they all contain batteries which store energy when the mains supply is available and a means of converting the battery charge into an alternating current (ac) supply in times of mains failure. All systems must therefore include a battery charger and a power inverter circuit.

As described above, the battery provides a power source for the inverter when the mains supply fails, whereupon it discharges at a rate determined by the critical load connected to the UPS output. The inverter automatically shuts down when its dc supply falls below a certain voltage, therefore the duration for which the critical load can be supported in times of mains failure depends upon the battery capacity and the percentage applied load.

A typical UPS system, which may be referred to as, Uninteruptible power supplies, Uninteruptable power supplies, Uninterruptable power supplies, Uninterruptible power supplies, Energy Systems, or simply UPS, will contain sufficient battery capacity to support its fully rated output load for 5 to 15 minutes. However, in most cases this can be extended by adding further battery cabinets or selecting batteries of a higher capacity. The battery backup time is often referred to as the autonomy time.

Virtually all systems contain a ‘bypass’ system which, in conjunction with some form of output switching circuit, provides a means of connection the critical load directly to the mains supply. In most cases the output switching circuit is implemented using solid-state switching devices. The rules governing the static switch control depend on the UPS operating mode.

Line-Interactive System

This type of UPS covers a range of hybrid devices that attempt to offer a higher level of performance than conventional off-line designs by adding voltage regulation features in the bypass line. The two most popular types of system in this category employ either a buck/boot transformer or a ferroresonant transformer.

Like off-line models, line-interactive UPS normally supply the critical load through the bypass line and transfer it to the inverter in the event of a bypass supply failure. The battery, charger and inverter power blocks are utilised in the same manner as in an off-line system but due to the added ‘regulation’ circuits in the bypass line the load is transferred to the battery-fed inverter supply less often, making this type of system slightly more efficient in terms of running cots and batter ‘wear’ compared with an off-line system.

Buck/Boost Transformer Design

One of the drawbacks of the straightforward off-line design is that the load must be transferred to the inverter immediately the bypass supply voltage reaches voltage limits acceptable to the load. This means that the UPS might transfer between bypass and inverter quite frequently if it is set up to operate with a critical load having a tight voltage tolerance. Apart from the power break each time this occurs, this method of operation incurs frequent battery usage which reduces battery life and might perhaps result in a battery that is inadequately charged when it is called upon to support a prolonged mains blackout.

A buck-boost transformer connected in the bypass line helps overcome this problem. The transformer has tapped secondary windings which are selected by relays to either step-up or step-down the bypass voltage as appropriate to maintain the UPS output voltage within the required output voltage limits. This means of controlling the output voltage permits a wider variation of bypass voltage to exist before the output voltage reaches its limits and initiates a load transfer to inverter.

A typical UPS in this category will sustain the load voltage over a bypass voltage range of +20.

Note that although the output voltage is maintained within its preferred window using this method, buck/boot switching unavoidably leads to a degree of step voltage changes as tap changes take place.

On-Line System

An immediate difference between this design and the previously described off-line system is that the battery charger is replaced by a ‘rectifier/charger’ black. The rectifier/charger may be two separate units or a combined power black. When the mains supply is present this black float charges the battery and supplies the inverter with a stable de voltage. In the absence of the mains supply the charger shuts down and the inverter dc supply is provided by the battery, which begins to discharge. The connection between the rectifier/battery and inverter is often known as the dc busbar , or dc bus.

As part of its control function the rectifier/charger generally includes an input current limit feature to provide overload protection an a dc overvoltage shutdown mechanism to protect the batter/inverter and dc filter components

This UPS design, which is sometimes also referred to as a double conversion UPS, offers the greatest degree of critical supply integrity in that the load is supplied with processed power at all times. That is, when the UPS input mains supply is resent the rectifier, charger and inverter power blocks are all active and the load is connected to the inverter output via the static switch. As the load is powered from the inverter under normal circumstances it is well protected from input supply aberrations because the rectifier and inverter act as a barrier to mains borne noise and transient voltage excursions, in addition to providing a well regulated output voltage.

If the input supply goes outside a preset voltage range (typically +10), or suffers a total failure, the inverter continues operating from battery power and the event is totally transparent to the load as there is no transfer operation involved. When operating from battery power the inverter supplies the same degree of supply regulation as when the main is present.

If the mains is not restored before the battery reaches its end-of-discharge voltage the inverter shuts down and, in some models, the static switch may attempt to transfer the load to the bypass line. The result of the transfer action depends on whether or not the module’s bypass line is connected to the same mains supply as the modules rectifier, and if the bypass supply is live. (Known as a split bypass system.)

What Happens if the UPS Fails?

A UPS Fault is generally seen as the inability of the inverter to provide the correct voltage or requency at the UPS output terminals and the resulting actions that take place may vary between models. Usually, the UPS control logic will detect the failing output voltage/frequency as the fault occurs and immediately signal the static switch control system to transfer the load to the bypass line in a make-before-break fashions. However, if the inverter is not synchronised to the bypass supply when the transfer is called fro it will be impossible to perform a break-free transfer operation, consequently there will be a brief supply break while the transfer takes place.

These are the only circumstances under which the load is subjected to a (brief) supply break in a true on-line ups system.

Note that although the break-free transfer to bypass is transparent to the load it is no longer supplied with processed power once it is transferred to the bypass supply; also, if the bypass supply is unavailable when the ‘fault’ transfer is necessary a total loss of power to the critical load is unavoidable.

The static switch usually transfers the critical load back to the inverter automatically once the inverter fault clears. This feature is occasionally described as auto-retransfer.

The response of an on-line system to an output overload is usually similar to that of the UPS failure described above in that the load is transferred to bypass until the cause of the overload clears whereupon it automatically re-transfers back to the inverter. If the bypass supply is unavailable this will lead to a total loss of load supply, therefore some systems allow an overload condition to continue to be supplied from the inverter for a finite time ? that is the UPS equipment is able to supply enough current to a faulty piece of load equipment to ensure that the load protection fuse or circuit breaker will automatically disconnect if from the UPS.

While feeding the overload under these circumstances the inverter operates in a current-limit mode and its output voltage may be reduced deliberately, but in most cases this is preferable to total power loss and of course conditions will return to normal if the overload is cleared during the allotted time.

Parallel Systems

This type of system comprises two or more UPS modules sometimes referred to operating in parallel to feed a common critical load bus, and is generally applicable to medium/high rated modules of on-line design. Units forming part of such a multi-module system are almost identical in operation to that of their corresponding single module counterparts. In fact, some manufacturers deign their UPS modules such that they can be used in either configuration without the need for complex modification.

Each module contains a static switch to provide a means of transferring the load between inverter and bypass. However, a certain amount of inter-module electronic control logic is added to ensure that all the module’s static switches operate simultaneously when transferring from one power source to the other. Damage would result if one module attempted to transfer its output to the bypass line which the others remained on inverter. Additional inverter control functionality is also required to facilitate inter-module load sharing and frequency synchronisation. These control signals, and others, are passed between the modules over low voltage control cables which are normally connected in a ring configuration to allow each module to communicate with every other module in the system.

One advantage of providing external input and output isolators for each of the modules is that it allows modules to be fully isolated and ‘hot-swapped’ if necessary without disrupting the remainder of the system.

There are two major reasons for installing a parallel system. The first is to increase the effective UPS capacity to enable the ‘system’ to power a larger load that is otherwise possible with single module. The second is to introduce a measure of module redundancy to improve the anticipated system reliability. Parallel UPS systems are therefore commonly categorised as either ‘capacity’ or ‘redundancy’ systems, although some are intelligent enough to operate as either, depending on the prevailing circumstances.

Irrespective of the intended mode, all the modules forming part of a parallel system must be of the same type and rating – i.e. it is not possible to parallel a 30kVA unit with one of 120kVA.

Installing the UPS Delivery and Positioning The importance of planning the installation and delivery of the UPS system cannot be overstated. Having chosen a particular system and topology it is important to decide:

1. Will the system fit into the space reserved for it?
2. Is the proposed location suitable?
3. Can and how will the system be transported to the location

Size & Weight

Improvements in UPS technology and design have provided much higher power densities which when combined with the flexible installation options for modern parallel systems make it much easier to find space for UPS systems. Also, because the most modern designs no longer need bulky and heavy input transformers, installation of very powerful UPS systems is no longer limited to the ground floor or basement plant room.

The manufacturer or supplier will provide details of space requirements and details of module weights in the UPS system specification.

Be sure to consider possible future expansion when choosing a UPS location and if you can allow extra space over and above the manufacturers recommended minimum, maintenance and service will be easier.

A UPS system is not just a big battery box. It contains electronic components similar to those found in computers and therefore requires careful handling when being transported. Additionally, large UPS equipment will be heavy and unwieldy and will require specialist contractors using ‘air-ride’ suspension vehicles and specialised lifting equipment to unload and position it.

The UPS supplier should be able to recommend handling procedures and suitable contractors with experience in this field.

Choosing a Suitable Location

The choice of a particular installation location for the UPS depends on many things:

1. How much space is available?
2. Can the floor safely support the weight of the equipment?
3. Will the installation cause continued inconvenience to the existing personnel and business?
4. Are the environmental conditions at the chosen location suitable?
5. Can access to the UPS equipment be made secure yet convenient?
6. Does the UPS comprise one module or several in parallel?
7. What is the effect of the installation on existing air flow and air conditioning equipment?
8. Will the switchgear controlling the UPS be in the same area?
9. Can the chose area safely accommodate the battery installation?

In general the location chosen for modern UPS can be summarised as follows:

Small UPS – less that about 20kVA, can be installed in a normal office environment although care should be taken to ensure that the additional noise and heat does not adversely effect the office environment.

Medium UPS – between 20 and 100kVA are designed to be installed in computer rooms.

Large UPS – greater that 100kVA, will usually be located either in a separate UPS room or in an existing plant room

Transporting the System

Having chosen a suitable location to suit the UPS system it is vital to survey the proposed transportation route. If a specialist delivery contractor has been employed for the task they will usually undertake a site access survey before attempting to deliver any equipment.

Even if the location chosen for the installation could in fact accommodate an addional three or four UPS, access to the area may prove problematic.

Check the access route:

1. Is the site easily accessible by road? Bear in mind the size of the delivery vehicle and the equipment required to off-load the UPS. 1. Are all doorways large enough for the UPS equipment and any transportation equipment to pass through?

2. Ensure the equipment can be moved along the entire route especially around corners.

3. Will the UPS need to be carried across soft or uneven surfaces?

4. Are there any stairs between the off-loading point and the final location?

5. If the equipment must be transported using a goods lift, chick that the lift has the required capacity.

6. Ensure that site staff are aware the equipment is being delivered and have made every effort to ensure that access along the route is unhindered on the day of delivery

Environmental Considerations
Heat
All UPS manufacturers will quote a maximum operating temperature for their equipment (typically +40C). The air conditioning plant must have sufficient capacity to maintain the conditions stated. Obviously the overall efficiency of the UPS will have a significant effect on both the size and the operating cost of the air conditioning plant. The high efficiency figures (up to 97). Whilst most UPS equipment is well designed, high relative humidity levels may promote corrosion of cabinets and internal parts. Simple dehumidification equipment is available for sites where this may be a problem.

Audible Noise The unit of sound intensity is the decibel (dB) and it represents the ratio between the sound level measured with a microphone and a reference sound level, Odb, which is defined to be approximately equal to the threshold of human hearing. However as the human ear is less sensitive to very low and very high frequencies, an additional ‘A’ Filter is applied when measuring background or other intrusive noises, hence the dBA unit used by all UPS manufacturers.

Typical audible noise figures for fully loaded UPS equipment range from 50dBA for 5dVA to 60dBA at 60kVA.

Electrical Installation

Installation Contractors
Electrically installing a UPS, sometimes refer to as or protected power system is a specialised task and should only be performed by a qualified and experienced electrical contractor.

The supplier of the UPS equipment should be able to undertake the installation work or supply a list of suitable contractors who can provide references of previous installations. Take the time to:
1. Check the credentials of the staff who will be installing the equipment
2. Contact and investigate previous installations and discuss their work with the staff on the other sites. It is important to ensure that the installation is carried out in strict accordance with the supplier’s instructions and it complies with local and national electrical installation regulations.

Installation Design
Small and medium sized UPS equipment will probable require very little installation work and minimal changes to the existing electrical wiring. However, if larger, high-power UPS equipment is being installed then careful consideration of the switchgear and cabling arrangements must be made.

Considerable time and therefore cost savings can be made by carefully planning the electrical installation to allow for possible business growth and the addition of extra UPS Modules.

Using an integrated switchgear and bushbar solution, makes the installation process for a modern parallel system much simpler by:
1. Providing a single point of entry for the incoming mains supply
2. a single point of entry for the bypass mains supply
3. a fully interlocked maintenance (or wrap-around) bypass circuit
4. correctly sized bushbars and circuit breakers
5. co-ordinated protection for the load and UPS equipment
6. straightforward connection of load distribution panels

Connecting the Critical Loads

In order to make best use of the UPS equipment and to ensue maximum protection of the critical load it is important to consider carefully how best to connect the load components. Large ring circuits feeding many critical load devices and unsuitable as a fault on one device may cause the circuit feeding it to trip or fuse and consequently disconnect power to other pieces of important equipment.

Radial wiring with individual devices protected by their own circuit breakers is a far better approach? In this way a fault in one device wi