You need to install explosion-proof products or your system is in a potentially explosive atmosphere? Our products comply with the most important directives and standards worldwide. Applicable standards and regulations govern the use of equipment within existing hazard zones. The complex, internationally applicable requirements for use of gearmotors, motors or drive electronics in applications in potentially explosive atmospheres are defined for the global market in the most important directives and standards:.
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Electrical equipment in hazardous areas
An explosion proof jet pump motor will often be classified as Class 1, Division 2. This means that there are ignitable amounts of flammable gases, vapors, or liquids that are not normally present in an explosive concentration, but may exist because of a leak. Some examples of Class 1 location would be a petroleum refinery, a gasoline storage facility, and a gas plant. If a motor fails in a class 1, division 2 area, it can cause a fire. Explosion proof jet pump motors are constructed to both contain a fire if it occurs within the motor, and prevent the ignition of explosive gases or vapors to the surrounding environment.
Find the nameplate on your explosion proof jet pump motor. These specifications must all be matched to make sure that you are purchasing the correct pump motor for you. The frame size of your old motor can be found on the nameplate; you must be absolutely sure to choose a replacement motor with the frame size of your old motor.
The frame size of the motor is indicated on the nameplate as a series of numbers and letters. When matching the frame size of the old motor to the new motor all the numbers and letters must match.
This includes all numbers and letters, as there are numerous suffixes that will appear on the frame size, which can indicate both the mount of the motor and the style of the motor's shaft. Explosion proof jet pump motors will end with either J, or T. J is used for jet pump motors that have a C-face mounts on the shaft end of the motor and a threaded, stainless steel shaft. T indicates that the motor is of the and newer "T" frame. Frame size is meant to indicate the physical size of the motor, not the electrical characteristics such as horsepower or voltage.
In general, though, the horsepower will increase with larger frame sizes, since larger motors are usually more powerful. There are many motors of the same horsepower built in different frame sizes. The bolt circle diameter, also known as the AJ dimension in NEMA standards, is the distance between the bolt holes on the face of the motor. The bolts holes will be less than 4 inches apart for a 48 frame, and more than 4 inches apart on a 56 frame.
The bolt circle diameter can be as large as 14 inches. You can also find the frame size by measuring the rabbet diameter or flange step, also known as the AK dimension.
A rabbet is a groove cut into the edge of the flange for locating purposes. Like the bolt circle diameter, the rabbet diameter is the distance between the two rabbets on either end of the frame. The rabbet diameter can range be 3 inches, all the way up to 16 inches.
The shaft size of the motor, or the U dimension, is another important piece of information you might need to know before replacing your explosion proof jet pump motor. Larger shafts will generally go with larger frame sizes, though this is sometimes not the case.
Your explosion proof jet pump motor will be operate on single phase or three phase power. It is recommended that the original and replacement motors be the same phase. Your motor's nameplate will tell you what phase your motor is running on. If you are unable to find the information that you need on the nameplate, then you may be able to determine the phase by the environment in which your motor is being used.
Single phase will usually be found in a personal pool or spa that is privately owned. Three phase is used in commercial businesses or places that run heavy equipment which would not be found in a residence. Explosion proof jet pump motors can either be called explosion-proof fan-cooled XPFC or totally enclosed explosion-proof TEXP , but these are the same thing. They both come with an internal fan to prevent the motor from overheating and, in turn, exploding.
Explosion proof enclosures are bulkier and heavier than their non-explosion counterparts, and are designed to resist corrosion and overheating. They are manufactured to be flametight, which requires their joints and flanges be constructed with narrow tolerances so hot gases from an internal explosion will cool to the point that when they are released they are too cool to ignite an explosion.
Explosion proof motors will either be rolled or stainless steel, which will give them a smooth body, or cast iron, which will give them a rough appearance. Cast iron motors will have fins that allow the motor to cool down more easily. The service factor is the overload capacity built into a motor. When determining the service factor horsepower, it will mean the maximum horsepower your motor can handle, above the rated horsepower found on the nameplate, without overheating.
The industry standard service factor is 1. To determine the service factor horsepower, multiply the total horsepower by the service factor, both of which can be found on the nameplate of the motor.
Do this for both the original and replacement motor; the service factor horsepower of the new motor must be equal to or greater than that of the original. It is highly recommended that your new motor have the same horsepower as the one you are replacing to avoid overheating and other damage to your pump.
TEMCo's explosion proof jet pump motors range from 0. Most replacement motors will have dual voltage. If the voltage of your old motor was V, then you should not have a problem. If the voltage was V, you will need to connect the new motor for the lower voltage. The motor's nameplate will guide you on how to set up the new motor for the correct voltage if necessary. The RPM of the motor will correlate with the frequency of the motor, which, in the case of an explosion proof jet pump motor, will most often 60 Hz.
The shaft of a the explosion proof jet pump motor's that operates on 60 Hz will rotate at RPM. This is usually standard with three phase motors. The direction of rotation will be found on the nameplate. It can also be determined by viewing the shaft end of the motor, though this will not always work, as sometimes there might be a different method for finding out the shaft rotation. If this is the case, the manufacturer will usually make a note of this. Explosion Proof Jet Pump Motors.
Nameplate Find the nameplate on your explosion proof jet pump motor. Frame Size. The most important thing to know when choosing your new motor is the frame size. The dimensions of the motor flange face can also help indicate the frame size. Single or Three Phase Power. Rolled steel motor. Cast iron motor.
Horsepower The service factor is the overload capacity built into a motor. Using a motor that rotates in the wrong direction can damage your pump.
Wiring Requirements in Hazardous Locations
The introduction of electrical apparatus for signaling or lighting in coal mines was accompanied by electrically-initiated explosions of flammable gas and dust. Technical standards were developed to identify the features of electrical apparatus that would prevent electrical initiation of explosions due to energy or thermal effects. Several physical methods of protection are used. The apparatus may be designed to prevent entry of flammable gas or dust into the interior. The apparatus may be strong enough to contain and cool any combustion gases produced internally. Or, electrical devices may be designed so that they cannot produce a spark strong enough or temperatures high enough to ignite a specified hazardous gas. Integrating these types of motors can ensure that equipment, facilities, and workers stay protected and machinery is not damaged.
Explosion Proof Motors
The EDR.. You can rely on our drive technology, even in potentially explosive atmospheres. There is no need to make any compromises either in terms of safety for your application or in terms of the variety of performance levels of the drives used.
We find solutions where other manufacturers of electric motors and generators have none to offer. There are many applications for DC and three-phase current motors in which standard products cannot provide an ideal solution — or in which there simply are no suitable standard products anymore. In these cases, specially adapted precision motors can solve the problem. The product range of special motors includes DC motors, AC motors, special motors, and generators. The standard power range of these DC motors is between 0. They feature high power density and special dynamics with a high short-term overload capacity. The motors are cooled on the surface of the housing by an axial fan IC or IC or through natural surface cooling without a fan IC The mounting dimensions in accordance with EN are identical to the corresponding AC motors and can also be changed if necessary. The DC power controller allows these motors to be operated directly with a battery and their speed to be controlled. This series features high dynamics, a special overload capacity in acceleration processes, and a low noise level. There are many areas of application for DC motors where the original motor manufacturer can no longer supply replacements.
EQP Global Explosion Proof
Explosion Proof motors are designed for use in hazardous environments having certain explosive gases or materials present. When choosing an Explosion Proof motor, it is important to select a motor that is approved for use in the specific class and group that defines the hazardous environment the motor will run in. We have access to Explosion Proof motors from most of the motor manufacturers we represent. Siemens also offers a single label explosion proof motor good for Class 1, Group D, Division 1 hazardous areas. These motors range from 1 to horsepower and feature constant torque and variable torque VFD operation. Click Here for detailed information on Siemens Explosion Proof motors. They are an ideal choice for your toughest hazardous environments and applications. Click Here for detailed information on Toshiba Explosion Proof motors. ESR has quick access to explosion proof motors at a Marathon warehouse located just 30 minutes away. They also offer Explosion Proof close-coupled pump motors and single phase motors.
WorldWide Electric Corporation
One common way of minimizing possibilities of electrical wiring and equipment becoming an ignition source in hazardous classified locations is to locate the equipment and wiring outside of the hazardous classified location wherever possible. This is always a practical approach and a good exercise of ingenuity, although it is not always possible. Often equipment and wiring installations have to be located within hazardous classified locations, and safe installations require a thorough understanding of more restrictive wiring rules. The general requirements of Chapters 1 through 4 apply to these installations unless modified or amended by the specific applicable rules in Chapter 5. A failure in the wiring system in any location is never desirable, but the risk of explosion that exists in hazardous classified locations provides urgent reasons to ensure that the minimum requirements of the Code are met. Some of the issues covered in NEC Based on the definition of equipment located in Article , almost every component of an electrical circuit and every piece of utilization equipment connected to that circuit would qualify as equipment.
Performance convinces, trust decides
Our explosion proof motors are designed according to IEC , , and They are characterised by high material quality, a robust design and bearings greased for life. They can be used in zone 1 and 2 endangered by explosive atmospheres in all industry except mining. Hazardous zones exists in industries such as chemical and pharmaceutical production, refineries, offshore platforms and tankers.
According to ATEX, a potentially explosive atmosphere is defined as a mix of flammable substances in the form of gas, vapour, dust cloud deposit which, in air under normal atmospheric conditions, can completely or partially catch fire in the form of an explosion when exposed to a source of ignition. Enclosures are certified as components. They will be assembled with other ATEX electrical, pneumatic and hydraulic components, among others to form a final solution which, in turn, must be ATEX-certified and subjected to a declaration of conformity.
Сопряженные, поскольку любовь без искусства есть просто удовлетворение желания, а искусством нельзя насладиться, если не подходить к нему с позиций любви. Человек стремится к красоте во множестве форм -- в последовательности звуков, в линиях на бумаге, в поверхности камня, в движениях тела, в сочетаниях цветов, заполняющих некоторое пространство. Все эти способы выражения красоты издревле существовали в Диаспаре, а на протяжении веков к ним прибавились еще и новые.
И все же никто не был уверен, что все возможности искусства исчерпаны,-- так же как и в том, что оно имеет какое-то значение вне человеческого сознания.
Вдруг это сигнал, чтобы любой корабль, проникающий в нашу Вселенную, знал, где искать жизнь. Или -- указание на расположение центра галактической администрации. Или, может быть,-- и я почему-то склоняюсь к тому, что так оно и есть,-- это просто самое величественное из всех произведений искусства.