5 best ways to seal an input circuit breaker

Last time, we discussed plastic boxes of the ShchRN-P and ShchRV-P types. Anyone who missed that article can read it here.

Today we will talk to you about other series of plastic boxes. There will be those that are similar in functionality, but there will also be those that are completely different. After all, the boxes that we talked about in the last article are only one, specific type that solves its specific problem. But the list of uses for plastic boxes, as well as the tasks they must solve, does not end there. There are also metering panels, sealing of machines, and so on. Today we will talk about small boxes, which are very similar to what we talked about last time. Let's talk about an analogue of a metal accounting shield, which in our case is made of plastic. We’ll also figure out how to protect modular equipment from unauthorized intervention. And if intervention cannot be avoided, then we will know for sure that it happened. I suggest not to waste time and move on to invaluable knowledge.

KMPn and KMPn with cover

There is a big difference between the two cabinets in the name, despite the similarity of names. Let's figure it out. KMPn is used for installation of modular equipment, such as circuit breakers, residual current devices, circuit breakers, and so on. These boxes are made of polystyrene. Polystyrene is a substance that is obtained by the polymerization of styrene. This substance has good fireproof and shockproof qualities. Styrene itself is a colorless liquid with a specific odor, quite pungent. Polymerization is the complex process of attaching monomer molecules to active sites in a growing molecule. I apologize for the tautology, but there was no other way. As a result of this process, a complex substance is obtained, consisting of the same molecules as the monomer. But this is a miracle, since from one meter of the same substance, which was liquid, a rigid body of a small box was obtained. KMPn boxes are used very widely. They can be found in the residential sector, offices, medical and educational institutions. Since such boxes can be sealed, they are placed in large panels to use this function. In switchboards of the ASU type, for example, the input machine is often sealed.

There are many advantages to such a box, and the very first is the possibility of installing a seal on it. This will help us protect ourselves from electricity theft. Imagine you made electricity and installed a seal on the box. To steal electricity from you, you need to open the box and connect to the machine. But if you open the box, you need to break the seal. Even if someone decides to do this, if you don’t find the filling in place, you will definitely suspect something is wrong. Also, the advantages include a built-in rail for installing modular equipment. In Boxes type KMPn you can remove the side wall. This is done to connect several boxes in a row. This installation option is very useful, since you can get by with small KMPn, and not use bulky ShchRN-p. The entire KMPn body is assembled with latches, without the use of self-tapping screws. This is a plus, since you don’t need anything to assemble such a box. You only need a regular slotted screwdriver. The latches are made in such a way that it would be most convenient for her to work with them.

Purpose of boxes for machines

Plastic built-in box for IEK 24 circuit breakers
In addition to circuit breakers, the box is used for installation and compact placement of the following protective and control devices:

• RCD (residual current devices);
• electronic meters;
• differential automatic machines;
• introductory machines.

In addition to these devices, the included grounding and neutral wire buses (combs) are also installed in the box.

Types of fillings

A seal is considered a disposable element that allows you to verify the fact of unauthorized entry into a protected object. They increase the effectiveness of a number of organizational and practical activities:

• Eliminate or minimize energy losses;
• Make a more efficient system for accounting for electricity consumption;
• At production facilities they have a positive effect on work culture and discipline.

The main task of the filling is not to be able to remove it without external factors of damage, which will be immediately noticeable. All types of fillings can be divided according to the following characteristics:

• Material of manufacture;
• Constructions;
• Operating principle.

A cable seal can be used as a lock; the strength, flexibility and length of the cable allow it to be threaded through misaligned holes in cabinet doors or hinges. The cable is pulled through a plastic destructible housing with an individual number.

The UNISIL plastic seal has a tightening design with a reliable lock, which has a metal insert with four petals, and has a pressed individual number on the plastic surface.

KRABSIL – a metal seal in the form of a clip, fixed with a spiral wire, an individual number is pressed onto the surface of the clip;

EDSIL-N is a plastic seal, actually an analogue of the UNISIL brand

Lead and polyethylene seals - have a diameter of 10 or 16 mm2, a cylindrical shape through the holes of which a wire is passed, after which the entire structure is pressed with a seal with an imprint of a number or other individual sign.

Sealing stickers have a special chemical composition of the adhesive layer; when the sheet is removed from the surface, it makes no sense to stick it in its original place, the inscription “Opened” or “Opened, Draw up a report!” appears.

Several types of reverse-type numbered plastic seals

Numbered plastic seals – have a cylindrical transparent body with an individual number. The seal is attached to a wire loop, secured with a plastic latch or a rotating mechanism, after which the rotary flag is broken off.

• Price: 1.88 UAH. – 4.7 rub.

To seal elements of electrical installations, plastic or lead seals are most often used.

Why is it necessary to seal a circuit breaker in the control panel?

One of the tasks of an energy supply organization is to prevent the theft and misuse of electrical energy. Along with installing a sealing system on the electricity meter, the circuit breaker is also sealed.

This is done for the following reasons:

• Preventing unauthorized connections. It will not be difficult to connect unmetered electrical consumers to the unsealed terminals of the circuit breaker. This practice is widespread in horticultural non-profit partnerships, where the metering center is outside the control of the security post, and there is no electrician duty service organized at the site.
• Preventing the theft of electrical energy. Having access to the terminal block of the electricity meter, theft of electrical energy becomes possible. Some types of meters are vulnerable to the actions of intruders if there is a possibility of uncontrolled interaction with the contacts of the protective device.
• Limiting the power consumption of the facility. By sealing the circuit breaker, it becomes possible to limit the consumer from changing the power consumption of the electrical installation. The presence of a documented seal prevents the replacement of the circuit breaker with a device with a different rated current, or the connection of new electrical consumers to the circuit breaker.

A specialist from an energy sales company carries out a control check of the metering board Source Rostovgazeta.ru

Using ShchUR (metering and distribution board)

Unlike a general shield, ShchUR allows for selective sealing. That is, if you need to seal the input machine, as in our case, then select the required control panel with suitable cutouts in the panel for the machine. Thus, we get an obvious advantage over the common shield.

Finally, we recommend watching a video that clearly demonstrates existing methods of sealing a circuit breaker:

Now you know how to seal the input machine in the panel so that it is convenient and, most importantly, in accordance with the rules. We hope our article was useful and interesting for you!

Last time, we discussed plastic boxes of the ShchRN-P and ShchRV-P types. Anyone who missed that article can read it here.

KMPn and KMPn with cover

As for the choice of such boxes, there are two main characteristics - color and number of modules. KMPn boxes can be designed for a different number of modules - from one to four. The colors of the boxes are also different - blue, white, red. Seriously - white, eco and beech. Eco is the color of pine, and beech is what it is.

BOM boxes

Plastic shields SCHURN and SHU-P

Conclusion

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Plastic boxes - buy a plastic shield in Moscow, an electric plastic shield at an affordable price from. Tel

The sticker consists of two layers - adhesive and the seal itself. It is glued to the body of the shield in such a way as to prevent it from opening. When you try to open the box, the message “ OPENED ” appears.

Expert opinion

It-Technology, Electrical power and electronics specialist

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Catalog One of the features of the electric meter is that if you have free access to the terminal block, you can use electricity for free. Ask, I'm in touch!