Circuit Protection Devices » BONEGA® P-E-P Miniature Circuit Breakers

Superior security and protection

Miniature Circuit Breaker BONEGA P-E-P - 10 kA

P-E-P (Perfect Electric Protector)

Improvements that increase security and protection:

 

1. Extraordinary High-speed Break

2. Guaranteed Short-Circuit Resistance

3. Reduction of Undesirable Power during a Short-Circuit

4. Locking Protection

5. Simultaneous Switching of the Multi-Module's
6. Revolutionary Designed Extinguishing Chamber

7. Durability

8. Terminal Resistant to Inter-Phase Short-Circuit

9. Vibration Resistance

10. Protection Against Hacking of an MCB

11. Higher Safety Standards

12. Wide Selectivity

13. Colored Control Levers

14. The Ability to Seal the Lever in an ON or OFF position

The Gold Amper 2005: The best product of the most prestigous Czech fair

The miniature circuit breaker BONEGA® P-E-P was awarded the prize The gold product at the BAEL Fair in Ostrava

3-years warranty

World Patents

1. Extraordinary High-Speed Break

The sooner the entire short-circuit process is terminated, the less damage there is
to connected devices and wiring.

The BONEGA® P-E-P MCB's have reached the highest breaking rate of any MCB (from 2 to 5 times higher than any other MCB).

 

An extraordinary high breaking rate beginning from the initiation of a short-circuit to its termination amounts to max. 5 ms (with a maximum load).


The BONEGA® P-E-P MCB's do not reach that high rate to the detriment of the higher arc voltage which raises the risk of protected parts (e.g. motors) considerably. As compared to other MCB´s, the arc voltage is equal or lower.


The high-speed switch-off consists of three stages:

The principal advantage of our MCB´s consists of an extraordinary high speed within the first two stages. The third stage is very quick, as well, but it is not so essential in the framework of the total speed. Within this last stage, it is most essential that the chamber is so well constructed that the arc does not “jump-out” in any direction (especially it does not come back to the contacts at all).

 

An almost textbook run of the short-circuit process is caused also by the suitable adjustment of the contact thrust. These contacts do not deviate by the influence of aerodynamic forces (as obvious from the charts).

 

Note: Some producers mention only the speed of contact disconnection (which is the first stage) instead of the total breaking speed. In the moment of contact disconnection, the power is still flowing through the circuit (voltage and current) because of the created arc. In this stage, the MCB has not disconnected the circuit yet.

 

Conclusion:

More information: oscilograms and graphs

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2. Guaranteed Short-Circuit Resistance

The MCB's BONEGA® P-E-P can be used under
the most difficult short-circuit conditions.

Our primacy consists in the breaking capacity of 10 kA up to the highest value of 63A, even with the curve “D” pursuant to CSN EN 60898 (nobody has reached it yet).

 

Our worldwide uniqueness consists in integration of the following phenomena with the kept breaking capacity of 10 kA:

I.) It is necessary to be aware of that the inside MCB´s resistance affects – inter alia – the breaking capacity. With the low nominal values (e.g. 1A), almost every producer can pride himself that his MCB theoretically has an unlimited breaking capacity. The higher is the nominal current, the lower is the assistance of the inside MCB´s resistance to absorb the short-circuit process. The nominal current crucial value is at 25A MCB´s and the very critical ones is at the highest value, i.e. 63A within the curve “D”. If the experts want to detect the MCB´s quality, so they always use the aforementioned crucial values (25A and 63A). Within these values, the design of the breaking mechanism, contacts, extinguishing chamber etc. becomes known very clearly.

The essential difference, as compared to the MCB´s of several producers, consists in the reached range of nominal currents, which is reached with the mentioned breaking capacity (25 kA, 15kA, 10kA, 6kA ...). We are preparing the upper limit of the nominal currents, which can be reached by our MCB´c within their breaking capacity 25 kA and 15kA.

II.)
Another important difference consists in the standard, in accordance with which the producer has achived his certification. In Europe, there are two basic standards, namely:

a) the so-called „industrial“ standard CSN EN 60947

b) the so-called „household“ standard CSN EN 60898


As to their relations to breaking capacities, the standards differ e.g. in their requirements of short-circuit quantity, which a MCB has to withstand without disablement of its function. That means one short circuit pursuant to the standard ČSN EN 60947 and three successive short-circuits pursuant to the standard ČSN EN 60898.

As resulting from the above, the industrial standard is significantly softer. For many people, that requirement of the standard seems to be illogical, but is takes into consideration the behavior of a user, after the circuit has been broken by a MCB. The reaction of the user in a household often is that he tries to switch-on the MCB for the first, second and third time and just after that he begins to trace the cause. In contrary, a professional electrician tries to switch-on it only once and if the MCB breaks again, he begins to trace the cause immediately.

III.)
Take into account also the third significant difference – the width of a MCB. There are some MCB´s with an even higher breaking capacity, but they are in a 1,5-modular or double-modular design.

Notice at other producers, according to which standard and up to which nominal current values they mention the breaking capacity. You can be surprised by the results of worldwide-accredited producers.

The above parameters are caused by the distinguishing chamber, which is one of our two worldwide-acknowledged Czech patents within the MCB P-E-P. Its extraordinary properties could be seen also at the prepared DPN (there is a MCB + switch within one module of 17,5 mm). In this case, we have also overcame the breaking capacity limitation of 4,5 kA which had been reached worldwide pursuant to the standard ČSN EN 60898.
 

The MCBˇs with a short-circuit resistance up to 15 kA are tested now. As to the single-modular design of those MCB´s (width 17,5 mm) and the given range of nominal currents, we would be the only ones worldwide. The prepared MCB´s BONEGA® P-E-P with the breaking capacity of 15 kA can find their application especially in special works where they can replace the 1,5 or double modular MCB´s.
 

3. Reduction of Undesirable Power During a Short-Circuit

The lower the power within a short-circuit,
the less damage to the connected devices and wiring.

It is a very important property of a MCB, which is often marginalized by the public.
The quality of the MCB protection is also conditioned by the amount of power that “flows” through the MCB during short-circuit. Its amount is given by the relation: E = I2.t.

As resulting from the mentioned relation, the high breaking rate of the MCB´s BONEGA® P-E-P reduces that undesirable power.
The standard CSN 60898+A1/A11 states the power limits based of which the MCB´s are classified. The category (class) is mentioned on a MCB in the frame below the breaking capacity.

Our MCB´s reach the limits of the 3rd (the highest possible) class without power limitation pursuant to CSN 60898+A1/A11, namely even with the nominal breaking capacity of 10 kA.

The following tables show the requirements of the standard for the MCB up to 16A and above 16A up to 32A incl., at various nominal short-circuit capacities.
 

The power limiting class reached by a MCB is an essential element for assessment of its protective function. We have met the third power limiting class within the whole range requested (as one of few producers), even with the rated short-circuit capacity of 10 kA. The following tables present e.g. the standard requirements for the MCB up to 16 A, and above 16A up to 32A incl. with different rated short-circuit capacities.

Permitted values I2t for the MCB´s with the rated current up to 16 A incl.
Rated short-circuit capacity

(A)

Power limiting classes

1

2

3

max. I2t

A2s

max. I2t

A2s

max. I2t

A2s

type B a type C

type B

type C

type B

type C
3 000

The limits not stated

31 000 37 000 15 000 18 000
4 500 60 000 75 000 25 000 30 000
6 000 100 000 120 000 35 000 42 000
10 000 240 000 290 000 70 000 84 000

(the values written in bold digits are valid for our MCB´s BONEGA®, series P-E-P):

Permitted values I2t for the MCB´s with the rated current above 16 A and up to 32 A incl.
Rated short-circuit capacity

(A)

Power limiting classes

1

2

3

max. I2t

A2s

max. I2t

A2s

max. I2t

A2s

type B a type C

type B

type C

type B

type C
3 000

The limits not stated

40 000 50 000 18 000 22 000
4 500 80 000 100 000 32 000 39 000
6 000 130 000 160 000 45 000 55 000
10 000 310 000 370 000 90 000 110 000

(the values written in bold digits are valid for our MCB´s BONEGA®, series P-E-P):

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4. Locking Protection

The BONEGA® P-E-P MCB´s cannot be locked from the outside.

red I - ON

green O - OFF

As the most products, also the MCB´s BONEGA® P-E-P has an indication of the contact conditions. That indicates a real contact condition and not only a position of the switch-on lever. In case of “sintered” contacts and switched-off lever, the user is clearly informed about flowing current. As the only ones, our MCB´s have that indication  

Reasons:

This property protects the electro installation companies against claims, which are caused by the end user, who can be proved wrong with difficulties.

 

The philosophy of the colored indication ON/OFF is explained within frequent questions.
 

5. Simultaneous Switching of the Multi-Module's

Connected devices are less strained.

A worldwide unique recently patented system of triggering mechanism which ensures a safe, more accurate and simultaneous switching of all the contacts at multi-module (pole) miniature circuit breakers; it has been reached a three-times longer switching distance than that reached by the best competitors world-wide.

This advantage enable e.g. continuous start of multi-fuse electric motors (all fuses are switched at the same time). 

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6. Revolutionary Designed Extinguishing Chamber

The extinguishing chamber affects the breaking speed
and breaking capacity.

The extinguishing chamber is of a fully new patent-protected conception.

 

a) a very fast “drawing-in” of an arisen electric arc into the chamber

When the movable contact is disconnected from the fixed one, it is necessary to “draw-in” the arisen arc into the extinguishing chamber as soon as possible and to interrupt the circuit definitely. The MCB´s BONEGA® P-E-P do not reach that high rate to the detriment of the higher arc voltage which rises the risk of protected parts (e.g. motors) considerably. This could be reached e.g. by higher number of sheets at the extinguishing chamber. Our chamber has only usual 13 interruptions. As compared to other MCB´s, the arc voltage within the MCB´s BONEGA® P-E-P is equal or rather lower.

 

b) it is not possible the arc to return to the contacts
In other MCB´s, the arc can return to the contacts, so the circuit is connected again. Thanks to the design of the chamber, this phenomenon is not possible in the MCB´s BONEGA® P-E-P.
 

c) fast arc extinction
The sooner the arc is extinguished, the smaller amount of heat arises. This heat can affect the adjacent circuits (warming of an adjacent MCB)
 

d) utilization of cold air at the extinguishing chamber for cooling the contacts
At the beginning of short-circuit process, the non-warmed air inside the chamber is used for cooling the contacts immediately before they are disconnected
 

7. Durability

Impact resistant.

The design of the electromagnetic high-speed release with ejecting armature for short-circuit protection has been solved so that it has not any adjustable element. The characteristic is given by the cross-section of the copper wire of the coil, by number of threads and spring pre-stressing in the core. This solution thus excludes that our circuit breakers could change their presented value by a fall or shock.

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8. Terminal Resistant to Inter-Phase Short-Circuit

MCB BONEGA® P-E-P eliminates danger of inter-phase short-circuit e.g. just by air ionization.

 

At the upper part of the terminal (serving for interconnection by means of forked strip), the MCB´s body is equipped with partitions which can be broken of. Those partitions shall avoid a possible inter-phase short-circuit in case of interconnection of multi-module types by means of multi-phase interconnecting strips. This short-circuit can be caused by air ionization or humidity, that support electric arc.

9. Vibration Resistance

The BONEGA® P-E-P MCB´s can be used in equipment with strong vibrations (e.g. railway wagons, site switchboards).

Strong vibrations can cause the short-circuit release to be put out of service (it loses its protective function) or the spot-welds to be disconnected (current interruption).

 

a) measures avoiding the short-circuit release to be put out of service

The MCB´s BONEGA® P-E-P are protected against the above phenomenon by a suitable seating of the structure elements, especially of the ejecting coil which is seated in a unique “cradle” (see the Fig.). This design has excluded the possibility to misalign and consequently to seize the movable core at the coil.

 

b) measure avoiding the spot welds to be disconnected

The quantity of spot-welds can be reduced significantly. The elements are interconnected by means of a modular design, or he parts are made of one piece.

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10. Protection Against Hacking of an MCB

We comply with the requirements of distribution
companies for disassembly protection.

The multi-pole MCB´s BONEGA® P-E-P cannot be disassembled in such a way that only the interconnection between stretching levers would be removed and the individual poles could function separately (e.g. through this, the day and night tariff rate could be influenced). Especially the distribution companies call for this property.


The mutual phases interconnection does not happen just between the levers, but also by means of pins which are put between the pole and they interfere directly into the inside mechanisms through a side hole. In addition, the multi-pole design is connected with rivets. The interconnecting and covering strip, which is between the levers, is visibly depreciated. Any interference in a MCB is obvious at first sight.
 

11. Higher Safety Standards

Construction of the cover eliminates electrical current injury
caused by touching the circuit breaker.

   

All locking bars are protected against danger touch and penetration of small foreign objects (IP protection 20).

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12. Wide Selectivity

The MCB´s can be used within combined projects.

The selectivity means a coordination of two successive breaking devices so that just the disabled wiring part can be switch-off upon a failure. A wide scale of current values and curves B, C and D enables our MCB´s to be put together to various safety cascades. Because of the above, the desired selectivity can be reached.

13. Colored Control Levers

The colored levers improve the transparency and comply with the requirements of power plants.

We supply both coloured levers in accordance with the nominal current values (corresponding to the marking of turn fuses) and black levers.

0,2 A - 1,6 A black  
2 A pink  
4 A brown  
6 A green  
8 A light green  
10 A red  
13 A sandy  
16 A grey  
20 A blue
25 A yellow
32 A purple
40 A black
50 A white
63 A copper-coloured

14. Sealing Under Certain Conditions

The ability to seal the lever in an ON or OFF position.

The lever can be sealed because of openings in both guiding sidewalls of the switch-off lever. Through these openings, a sealing wire can be fed. This sealing wire passes also through a groove on the movable lever. This groove has been engraved in OFF and ON positions and it disables the motion of the lever itself.

If the lever is sealed in the ON position, the immobility does not render the function of the circuit breaker impossible. In the event of short-circuit or overload, the circuit will be shutdown (independently on the fixed position of the lever). The MCB case enables the lever to be sealed independently on placing the adjacent MCB´s.

 

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Export Manager: Michal Hudeček, tel: +420 605 518 724, michal.hudecek@bonega.cz

Sales Department:  - Mrs Adriana Jamná, fax +420 518 335 216, email : adriana.jamna@bonega.cz, 696 66  Sudoměřice nad Moravou 302

 


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BONEGA spol. s r.o., Potoční 302, 696 66 Sudoměřice nad Moravou, Czech Republic, michal.hudecek@bonega.cz, tel. +420 605 518 724