Book 4 electrical circuit diagram. Fire damper control unit. Conclusions: I don’t work with NPF “Svit”

BUOK-1 and BUOK-4 for electromagnetic drives

Modification

Number of connected valves

Drive supply voltage

Command signal

Type of shell

BUOK-1 SVT667.12.111 (SVT667.22.111)

1

24VAC

IN modern system ventilation and smoke protection includes a control unit BUOK-1, which is designed to control fire dampers: KLOP-1, KDM-2 and KOM-1. It was developed in Russian company– LLC NPF “SVIT”, registered in the city of Gatchina, Leningrad region.

This unit is controlled in manual mode, directly by pressing buttons on the unit panel and in automatic mode, guided by signals from the fire alarm station. It is manufactured in several modifications, depending on the type of housing, the type and power supply of the drive, the voltage of the command signal, and the purpose of the fire valve. The light indication on the panel displays the following indicators: “Standby mode” (green), “Valve activated (yellow)”, “Control” (green, yellow). In standby mode light indication: “Standby” and “Control” are lit green, and the “Valve tripped” LED does not light up. If the valve is in an intermediate position, the "Control" LED lights up yellow. When the valve is triggered, the “Control” and “Valve Triggered” indications light up yellow.

The unit controls one motorized valve powered by alternating current 220/24V, the command signal is supplied to the unit with a voltage of 220V, +24V. In a plastic case, the BUOK-1 unit has dimensions of 68x86x105, and in a metal case - 45x116x134. In terms of climatic design, the unit complies with GOST 15150-69 UHLZ. Installation of the BUOK-1 unit in a metal casing is carried out in accordance with the equipment placement plan, as well as in accordance with the “Rules for the technical operation of consumer electrical installations”. To securely fix the block to the wall, it is enough to use self-tapping screws measuring 3x20. In a plastic case, the device is installed in a common electrical room, on a strip.

If you want to secure your home, office or production room from fire, the BUOK-1 fire damper control unit will optimally help you with this. SVIT engineers made every effort to ensure that this device meets international fire safety standards. The LLC NPF "SVIT" company guarantees the full functionality of the unit for 2 years after commissioning and 2.5 years after its shipment from the manufacturer's warehouse.

The BUOK-4 control unit was invented with the aim of using in the control process from one to four electromechanical valves for a wide variety of purposes. This list may also include fire-fighting valves that are included in ventilation system and smoke protection.

Control is possible in both manual and automated control modes.
BUOK-4 has a number of functions, the main ones being the following:
- monitor the position of the valve flap;
- control the process of all valves reaching the required operating mode (during start-up);
- ensure that the valve actuators are in good condition;
- monitor the device’s access to the power source.
As for monitoring the level of serviceability of the drive, this specific process takes place indirectly, namely: provided that the valve flap is in the “standby” position, then the drive is in a state of full serviceability. A block of this kind is created in various configurations and modifications, the classification of which is based on the types of drives to be connected, the voltage of the source from which the drives are supplied with power.
BUOK-4 cases are manufactured with a push-button switch, a printed circuit board (on which the electronic part execution), a light indicator, with the help of which it is possible to determine the level of readiness of the valve for operation, as well as monitor the correct position of the dampers, fuses and relays.
Such a block has special clamps that are used to connect power access cables, electric drives, sensors, signals arising during the control process and various alarms to it. Built-in LED indicators allow you to monitor the status of the conduction when the standby mode is on certain work, to which such an indicator is capable of responding with the specified color. SVIT units are also capable of working effectively remotely.

BUOK-4 DEbriefing

Today we will talk about BUOK-4 production NPF "SVIT".

What’s interesting is that the production is certified according to ISO9001.
Well, what else can I add, there should be quite decent production, there should... be....

I had the misfortune of meeting them at a lecture given to us by specialists from the Scientific and Production Company "SVIT", the lecture was immediately after the exhibition on fire safety.
And the devil pulled me to go there...
No, of course they gave good lectures and kept us busy.
Such eloquence would give them, some time later...

Understanding that time is the most valuable thing on this planet, I will still spend a little more by posting a description of this craft.

At the same time, by the way, let’s touch on their shields ShK-S.
But the shields, of course, were more fortunate, they are simpler, and the electricians who assembled them do not have the same flight of thoughts that the “engineers” have. NPF"SWIT", the creators of the "masterpiece" BUOK-4.
Okay, let's get started, let's start gutting this miracle of engineering...

Let's break down our analysis into stages:
1. Electrical circuit diagram
2. Analysis of the electrical circuit diagram
3. Design features products
4. Analysis of product performance under combat conditions
5. Recommendations
6. Short review shields ShK-S

Let's start with the diagram of this "device", which the "engineers" stubbornly refused to give me. NPF"SWIT", citing the fact that this is KNOW-HOW.
And I guess I’m a complete loser, because I’m not able to set up this wonderful work of art.
I had to spend a day drawing the diagram.

Frankly speaking, If you gave me a diagram- then this article would not have appeared on the Internet.
But from the side of the "engineers" NPF"SWIT“There was absolutely complete indifference to my problems, which was superimposed on sarcasm, and this was in relation to my desperate attempts to submit the work on time.

There are two diagrams, versions 3 and 4, they are almost identical except for small details, I don’t remember which one is more accurate, in principle the principle of operation is important, and the diagrams are for convenience.

Scheme BUOK-4, (3rd version, click to enlarge)
http://vzor. biz/hpage/images/buok4.ver3.gif

ANALYSIS OF THE SCHEME OPERATION
Selection of element base, SMD resistors and capacitors, voltage suppression, stabilized power supply, LEDs, statuses.

1. Let's start with the element base.

Usually they try to unify the element base, i.e. a decision is made on SMD elements or DIP and then work only with them.
If a “Soviet” element base is used (well, this cannot be avoided), then they try to put it in less critical areas of work, these elements, and so on.
The BUOK is a mixture, and the logic of using certain components is completely incomprehensible.

This is what we see in BUOK - on Statuses(for example 1 channel: R1, R2, R3, C1, C2, C3)
There are used powerful SMD resistors in total 19 Pieces, and high-voltage SMD capacitors in total 18 Pieces - these products cost enough Expensive And I think they cost a total of about 20-30% of the cost of the product.
Why, for what purposes and tasks are such expensive components used?!
Why weren't cheaper elements used?
After all, there is plenty of space, and the area is not very important....
Well, this is a rhetorical question.

And right there, To a very important area, they put a wonderful “Savetsky” button “ START“, the “impeccable” work of which we will certainly devote a whole paragraph to!

An original, let's say, technology for selecting components!

We will return to power decoupling later, but now let’s see how this scheme is implemented.

The input voltage is quenched by resistors and a capacitor (an important area), which is then supplied to Domestic assembly KTs407 and is stabilized by a zener diode coupled with a capacitor!

This circuit solution depends very much on the parameters Networks And parameters Components And extinguishing capacities Capacitor(shamanism)
Here you can see " Care"about efficiency Products! - and this is after use Dear SMD high voltage capacitors + Dear powerful SMD resistors!
And the setting! The shaman's tambourine was beaten when setting up the circuit, not otherwise.
Let's see what loads are not so small: 3 powerful power-hungry relays and a scattering of transistors that also want to eat.

As a result, circuit solutions for the stability of the unit " Acquitted"completely, each product had to be customized individually, in one word" Industrial"automation.

Another feature, the circuit has the ability to select power from 3 sources 220V, 24V, 12V, which " Wise"solution and savings!
The adjustment is carried out, without further ado, by jumpers!
Looks like the switching power supply (transformer at worst) - the engineers at NPF SVIT have a redundant element
Indeed, why is it needed if there are resistors, capacitors and a zener diode.

By the way, one of these “power supplies” simply exploded after a month of operation - KTs407, and all that was left of the resistors were charred legs.

Absolutely incomprehensible savings, selection of elements and technology in a rather serious product.

3. A very interesting approach to the LEDs used in the status chain!
The LEDs are imported (price) and very sensitive (interference), they glow from a milliampere, and since we have induced mains voltage on our statuses, it is absolutely impossible to get rid of it (another Super feature Products) - therefore statuses turn into light music.
It is quite difficult to explain to the customer why the statuses (LEDs) work at random.
Although in fairness it should be noted that if the valve hangs next to BUOK-4- Well, at 5 meters, then the LEDs behave sanely.
But how often, on Real object, this happens, besides this BUOK-4 designed for connection 4 Valves, and 4 The valves are nearby....

4. An even more original circuit design is used to operate the status relay K3-K5, I can’t explain such a flight of thoughts (I’m not a shaman), I’d better skip this point, there are no words - just interjections...
better see for yourself...
And think how THIS Set it up in real conditions, and not on the designer’s table...

DESIGN FEATURES OF THE PRODUCT
Case quality, button Start, housing cover, access during routine maintenance, do not confuse zero and phase!

1. Frame BUOK- a rough stamped square iron box, coated with powder paint, with a pasted picture indicating the operating modes of the product.
The board is attached to four metal racks, which, by the way, break very easily and some blocks already came with broken racks.

2. The funny thing is that the BUOK power button is hidden inside the BUOK body! A! What!
To turn it off you have to remove the cover, but you think it’s easy? Okay, more on that later.
By the way, I didn’t immediately understand the whole brilliant idea of ​​the designer!
Remember we said that the circuit has no power supply isolation!
Remember these 2 points!!!

3. We need to mount the product - Let's get started!
The design cannot be disassembled so easily, first you need to unscrew the 4 bolts at the edges, Attention, a stamp that is used to make the case BUOK-4, worn out terribly, so Label the lids, they are individually adjusted for each box (a hammer helps, a wooden one is desirable).

4. By removing and marking the cover, you will see our board, remember that the circuit does not have power supply isolation, so For security Serve food through Separate switch!

And remember EVEN IF YOU TURN OFF THE POWER, on board BUOK-4, Via local switch button - mains voltage STILL PRESENT ON THE BOARD! Therefore - an external switch!

But the switch is also inconvenient, because you won’t bet on every BUOK by the switch?
After all, if there are 3 blocks hanging nearby, and in order to de-energize one, you need to cut off the power to all 3 or install 3 switches - Cute isn't it?? Congenial!

5. The instructions indicate that IT IS FORBIDDEN Mix up phase and zero when connecting power BUOK-4.

I'll " I'll calm you down", catch As you wish, anyway, the assemblers of this product connect the power wires from the power button to the board As they please, so your efforts are in vain.

6. During installation Especially carefully Handle the " button Start"If you accidentally touch it, check its operation.
The peculiarity of this button is that its contacts are pressed into the body of the button and are held there solely due to friction.
Therefore, I draw your attention once again - carefully, and PRESS THE BUTTON AS FREQUENTLY AND SMOOTHLY AS POSSIBLE, DON'T PRESS HARD!!!

About 10% of my buttons failed, although they are easy to repair and quite cheap.
But imagine my surprise, the first time the unit worked on its own due to a button failure (the contact fell out), On working supply machines, and because of this filthy button, the air ducts swelled before the differential pressure protection worked!
Are you having fun!? - Me too!

7. But it’s not boring to carry out routine maintenance, you understand what you are paid for, but I strongly recommend buying rubber gloves.
I’m sharing a secret, electric gloves are quite rough and uncomfortable - I bought surgical gloves and liked them, although my hands sweat.

And be sure to do it good Grounding, otherwise you never know what will happen to such a design.

WORK IN COMBAT CONDITIONS.
What can we say about the performance of this product in combat conditions, so to speak - they work, but...
But I pray for the time when the warranty period ends.
Now the obvious problems:
1. The "Start" button glitches - but fortunately it's quite rare, mostly these glitches are eliminated during the commissioning process, and then they return to normal.
2. High-quality power supply is very important (again - there is no galvanic isolation and all the garbage that flies through the network flies to the BUOK).
There were cases of spontaneous operation of the BUOK, and for a long time I could not understand what was happening, I cured it by supplying power from another input.
3. Very poor noise immunity, which manifests itself in the random glow of LEDs, is difficult to treat; shielding will not help (see diagram). How to treat? Place it as close to the valve as possible, which is understandably not always possible, and/or replace the imported LED with a domestic one. Grounding doesn't help much.

BRIEF OVERVIEW OF SHIELDS ShK-S
1. Apply Only Domestic components, and the price is very decent, obviously Inconsistency Price quality!
2. The assembly is disgusting, It is necessary to stretch EVERYTHING!!!
3. Please note - Collectors save On ferrule lugs, instead of using double ferrule lugs, they insert Wires different sections in one terminal!!! VERY DANGEROUS!
I had equipment malfunctions because of this!!!
3. Half The shields did not turn on, the problems of the assemblers - The assembled shield does not match Electrical circuit diagram.
4. All wires One The colors are extremely uncomfortable!
This is how they save money on us!

Conclusions: I do not work with NPF "SVIT".

P.s. By the way, the managers of NPF "SVIT" are quite sane people, unlike the "designers" they tried to help...

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