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Electrician crane service profession

 

Profession - Electrician for crane serviceThere are a lot of professions related to electrical engineering today. But we must admit that the level of requirements for the performer in these professions is very different.

As an example, many well-known electricians who serve some household or office buildings and are mainly involved in replacing bulbs can be cited. And they can be opposed by specialists repairing complex equipment, which incorporates power electronic conversion equipment. Both those and others - on "you" with electricity, have an electrical safety approval group (possibly even the same one). Both are skilled workers.

But even with a cursory examination, the differences in the qualifications of these specialists are visible to everyone. With all due respect to ZhEK electricians, they are far from professional in the professional sense, to electricians who diagnose and repair complex electromechanical devices.

So, in the “hierarchy” of electrical engineers electricians servicing modern cranes occupy a place close to the top. Without exaggeration.

Those days when the asynchronous drive of electric hoisting machines was launched by direct connection to the network, are long gone. Today, only low-power crane beam drives are turned on in this way. And they are gradually moving to more advanced (read - more complex) drive systems.

The rheostatic start-up of an electric drive using motors with phase rotors is also yesterday. The vast majority of cranes manufactured today are equipped with electric drives of the system “frequency converter - asynchronous motor with squirrel-cage rotor”. In cranes controlled from the driver’s cab, more and more all such drives have such a system. And this applies equally to both domestic and foreign cranes.

Profession - Electrician for crane serviceThe advantages of such a drive system are its higher energy performance, the possibility of implementing almost perfectly smooth start-up and braking, the complete absence of jerks and shock loads on the mechanical elements of the drive. And indeed, the possibilities of controlling a variable frequency drive seem almost limitless.

The possibilities are endless, but their use requires high qualification, knowledge not only in the field of electric drive, but also in the field of electronics.

A crane is an object that presents an increased hazard during operation. Hence, a large number of all kinds of locks and protections are included in the circuit diagram of the control circuits of any crane. And the greater the load capacity of the crane, the more complicated the circuit of its control circuits.

Not every electrician is able to figure out the schemes of large special hoisting machines. In addition, most modern cranes are equipped with microprocessor safety devices, the periodic maintenance of which and inspection with test weights also often fall on the shoulders of crane maintenance technicians.

Crane

So, we note that in order to be an electrician for repairing cranes, it is necessary:

1. It is good to read the circuit diagrams, to know the principles of work and purpose contactors, relays, controllers, resistor blocks, protection and control devices, have an idea about the operation of modern frequency converters;

2. Have an idea of ​​the operation of microprocessor and network devices, be on the "you" with computer science;

3.To be familiar with the norms of not only the PUE and PTEEP, but also of a number of other documents regulating the operation of hoisting machines. Among these documents, in particular, PB-382-00, RD 10-208-98 and others.

4. To know not only electrical engineering, but also mechanics, since each crane drive is an electromechanical device. And without the knowledge of mechanics, setting up this drive will be extremely difficult.

5. Familiarize yourself with the Electrical Machines training course at least at a level that allows you to recall the characteristics of electric motors if necessary.

6. Do not be afraid of heights and poor working conditions. Cold, wind (within the permissible wind load for a given crane) - all this does not wait until you finish the repair and maintenance of the lifting machine.

7. Have skills in safe work with electricity and work at height.

8. Have good health. Indeed, even low vision for doctors is a formal reason to deny a person the right to perform work at heights. And even glasses will not help here.

Obviously, not everyone can be an electrician for servicing cranes. Here it is only necessary to make a reservation that such requirements should be presented only to specialists working in enterprises with a large and regularly updated fleet of hoisting equipment. And there are plenty of such enterprises today.

Alexander Molokov

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  • What you need to know about modern electric motors
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    Comments:

    # 1 wrote: Alexander | [quote]

     
     

    And we have cranes and beam cranes repaired by ordinary electricians. And there is nothing special there - the same relays and starters. And there are also machines with complex schemes.

     
    Comments:

    # 2 wrote: | [quote]

     
     

    It would be nice to lay out some schemes with a description of KB-403,401

     
    Comments:

    # 3 wrote: | [quote]

     
     

    And yet, Soviet tower cranes are more convenient and reliable! At least because most of the equipment is at the bottom. On modern tower cranes made in China, there is no documentation in Russian. Interested in a tower crane "Powerwork". Tell me where to find the information.

     
    Comments:

    # 4 wrote: | [quote]

     
     

    It is written sensibly, but the circuits for familiarization would not hurt!

     
    Comments:

    # 5 wrote: Andrew | [quote]

     
     

    Dmitry, what does the scheme have to do with it? This article was written to popularize the profession of an electrician in servicing cranes and circuits would be out of topic here. Look at the site "School for an electrician." There, the main emphasis is on industrial electrical equipment. And the electrical circuits of the cranes are there.

     
    Comments:

    # 6 wrote: Vasya | [quote]

     
     

    Moreover, this profession does not appear in the register, that is, there is no gas and oil supply electrician, cranes, etc.! If you do not believe me, the Internet will help! Banal divorce for all kinds of control, fake training. As soon as the profession appears, it should become one of the most dangerous, and the matter will not be limited to working at height, since it is more than 5 meters, which means it is especially dangerous. These are benefits, days to vacation, add. payment and early retirement.

     
    Comments:

    # 7 wrote: | [quote]

     
     

    Once, at sunset, the Sovdep worked at the plant as an electrician for the repair and maintenance of electrical installations (MSC and Galvanic, Lakokraska). We had a team of 6 people, we didn’t serve the GPM, they were serviced by electricians from the RMC (mechanical repair shop). These GPMs were always, to put it mildly, not respected. Because, the schematic diagram of this equipment was so elementary in comparison with even a turning and screw cutting machine that any trainee of 3 categories with closed eyes could assemble a panel with starters and a button station.Later, working as an electrician in a major organization, he was forced to service gantry cranes. Since the sheep foremen do not have a clue about the electrical work at the height and the difference of the electrical circuits and between the crane and the lamp in the toilet. I’m afraid that the profession of an electrician for gas and oil and even an electrician for repair and maintenance of electrical installations, will soon sink into oblivion in a filthy scattering. Today, random people are hired for unskilled (electrician) jobs. whose main skill should be a firm grip on the shovel and broom, and of the stretcher.

     
    Comments:

    # 8 wrote: | [quote]

     
     

    Vasya, but it appears in federal norms and rules in the field of industrial safety. So nowhere without it!

     
    Comments:

    # 9 wrote: | [quote]

     
     

    I work as an electrician for gas processing (production of panels for new cranes, trips for overhauls). So I tell you, the frequency drive, it is certainly good, but so far very little common. Asynchronous devices with a phase rotor are mainly used, and the panels for them are both relay and thyristor ones with microprocessor control. Well, about the complexity of the schemes - there are different ones. There is a primitive - we call them "bicycles" and there are also quite serious ones, for example KSDB-400 or thyristor TEDF-4M (with a microcontroller).

     
    Comments:

    # 10 wrote: | [quote]

     
     

    I usually don’t swear, but when a new crane comes that is as simple as five kopecks supplying stoves on top of the stove in one pile, controllers such that hands fall off after an hour’s operation, the bridge’s progress controller works across the movement of the control panel buzzes, the lighting is inappropriate after a week, the cable truck has disappeared and so I can write such a nutrition that imates are not enough

     
    Comments:

    # 11 wrote: | [quote]

     
     

    Vasya,
    GPM This is not a profession, it is from the workshop or department to the workshop where I work Electricians for the repair and maintenance of hoisting cranes, Locksmith for the repair and maintenance of hoisting cranes, as well as if there are Electromechanics elevators. for example (Transport Workshop, (team, department) GPM.).