BONEGA^® EV-6J Miniature Circuit Breakers (MCB) to 63 A

They are thus intended to protect the electrical distribution systems and electrical devices against short-circuit (if the defect has been caused by failure or incorrect connection) and to protect the electrical distribution system against overload (if the circuit has not been damaged but an extreme thermal overload occurred which could damaged the wiring).

They are suitable especially for common installation into switchboards and switching points of low-voltage end circuits. They are designed mostly for alternating current but they can be used also for direct current for which the reduction of short-circuit resistance by approx. about 20% has to be taken into account (because of a higher stress of contacts).

With their design as well as technical parameters, the miniature circuit breakers BONEGA^® EV-6J conform to the present high world level.

They are marked with a logo with a trademark BONEGA^®. It is a traditional brand since 1992 which shall be introduced to the markets worldwide. The name BONEGA® comes from the ESPERANTO language and in that language, BONEGA®means excellent, good. The abbreviation EV means economical and beneficial (an excellent price with excellent duality guaranteed by a three-year guarantee period).

The miniature circuit breakers are manufactured in accordance with a particular European standard CSN EN 60898, as amended. They are able to comply with any design requirements for arrangement of MCB´s with regard to the selectivity and requirements for individual characteristics B a C.

The MCB´s BONEGA^® EV-6J offer their users more than 20 advantages

The miniature circuit breakers BONEGA^® EV-6J can be mutually interconnected by means of single-pole to four-poles interconnecting reed (rack) strips.

1. advantage of our miniature circuit breakers BONEGA^® EV-6J : high quality and reliability – guaranteed by a warranty period of 36 calendar months !!!

Our Czech manufacture of electrical devices is famous for its high precision and a permanent looking-for innovations which contributed to a fact that we did not note any claim for our MCB´s in 2003

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2. advantage of our miniature circuit breakers BONEGA^® EV-6J : a very low price (see the Price List)

This series can highly compete even with the products imported from Asia !

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3. advantage of our miniature circuit breakers BONEGA^® EV-6J :short dimensions (see the sketch above)

With the width of only 77 mm, our MCB´s belong to the smallest ones over the world (thus, there is more space for conductors lining and connecting in the installation covered part of the switchboard). This property is to be assessed mainly when using those MCB´s in small plastic switchboards for apartments..

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4. advantage of our miniature circuit breakers BONEGA^® EV-6J :a variable connection of input or output

Input or output can be connected both onto the upper and lower terminals without impairing the function of the miniature circuit breaker in any way. Through this advantage, the mounting is easier and the distribution arrangements at the switchboards can be variable.

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5. advantage of our miniature circuit breakers BONEGA^® EV-6J :it is not possible to change the characteristics by a fall, shock

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. Its 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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6. advantage of our miniature circuit breakers BONEGA^® EV-6J : a high shock resistance- they are suitable for application in the switchboard at building sites

The shock resistance is given by a very good bedding of the construction elements. As can be seen at the picture, the ejecting coil is seated at an imaginary "copper tub" which guarantees protection of the coil. If the circuit breaker falls down, the coil remains in the set-up direction. Furthermore, the "tub" excludes misalignment of the coil core, and thus the crossing thereof. Otherwise, the crossing could cause shutdown of this significant protective function of the circuit breaker.

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7. advantage of our miniature circuit breakers BONEGA^® EV-6J : a higher protection of the MCB itself

The MCB has the protection IP 20 – with its design, the MCB protects against a dangerous touch by a finger or against foreign small objects

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8. advantage of our miniature circuit breakers BONEGA^® EV-6J : a thorough - multiple check-out of all the parameters at each circuit breaker

The high quality is given both by suitable materials and design, and by a thorough checkout of all the parameters at each circuit breaker:

1.  triple check of the electromagnetic high-speed release with ejecting armature for short-circuit protection (if the defect occurs because of the failure or incorrect connection )
   
   Every piece manufactured passes through a testing stand controlled by the computer. At that stand, there is verified the function of the circuit breaker on the undermost limit of the required nominal current value for given characteristics (B, C or D) by which the switch-off must not occur yet; after that, the current test of the upper limit of the nominal current value of the given characteristic follows immediately - under this current the velocity of circuit-breaker switching-off must not exceed 0,1 s. This test procedure is repeated three-times !
    
2. at least a double check of the time-limit thermal release for overload protection (if the circuit has not been damaged but a significant overload occurred which could damage the electrical installation)
   
   The thermal release test is done two-times at least until the bi-metal is not mechanically adjusted to the required value. Between particular tests, the circuit breaker is left to cool down!
   
   The complete test pursuant to CSN EN 60898 - a long-term test of the thermal release at random chosen samples - is performed at least once a shift.
    
3. at least a fivefold mechanical reliability check: This test is a part of the two aforementioned tests during which the switching-on and switching-off mechanisms are verified.
    

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9. advantage of our miniature circuit breakers BONEGA^® EV-6J : the possibility to interconnect the MCB´s with other devices in an easy way

The height of terminals conform to other following BONEGA^® instruments, such as current protectors, module switches etc.

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10. advantage of our miniature circuit breakers BONEGA^® EV-6J : big terminal cross-sections

The cross-section 35 mm² for solid conductor and the cross-section 25 mm² for stranded conductor is stated for the range up to ln 40 A. The geometric cross-section of the terminal, however, is 50 mm². You will appreciate the terminal cross-section of 35 mm 2 with all nominal values, when mounting any bigger cross-sections of the conductors which must be dimensioned for higher power inputs. You do not need to solve such problems by means of additional terminals on which the contact resistances could occur

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11. advantage of our miniature circuit breakers BONEGA^® EV-6J : fixed terminals

New design of the terminals (made of one piece with double overlapping through which the screw goes - the possibility to break it when mounting is fully excluded and the possibility to strip the thread is essentially limited)

The clip terminals themselves have in their bottom part also the cross grooves which avoid the conductor to be taken out from the terminal because being tightened, the conductor sinks into the grooves. Simultaneously, the transmission area gets large thus the contact resistances are limited considerably.

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12. advantage of our miniature circuit breakers BONEGA^® EV-6J :t he screws of the clip terminals are protected against fall out from the circuit-breaker body

The clip terminals are seated in the circuit-breaker casing so that the screws of the terminals cannot fall out from the circuit-breaker body, even if they are fully screwed out from the terminal. This advantage has been reached because the diameter of the hole at the plastic box (casing) for a screwdriver is less than the diameter of the screw head. The screw head has been modified both for cross and flat screwdrivers.

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13. advantage of our miniature circuit breakers BONEGA^® EV-6J : the possibility to interconnect the miniature circuit breakers by means of very reliable interconnecting reed (rack) strips

Deciding about the basic accessories as interconnecting of more miniature circuit breakers and protective switches BONEGA^® or other electrical device is, we have considered if we shall use the reed (rack) or forked strips for terminals of our MCB´s and protective switches. After consultations with important domestic and foreign switchboard manufacturers we have explicitly decided to make the reed strips (the manufacturers in Europe abandon now the modish forked system of interconnecting strips because when tightening the screws, the forks can distend, thus the transmission area as well as current load rating is reduced). It concerns the copper interconnecting reed („rack“) strips with insulating material made of self-extinguishing ABS-VO ( ABS characteristics). The copper contacts (reeds) are located closed at the strip edges.

The main advantage of the reed (rack) strips is that the reed also presses with the pressure (second) area of the terminal onto the put-in conductor, thus it limits to the minimum any possible contact resistances, caused by insufficient transmission area at the forked strips (the forks can distend to sides, when tightening the screws). The connection cannot "burn-out" and the interconnecting miniature circuit breakers and protective switches cannot be damaged
 

Other significant advantages of the reed strips used at our miniature circuit breakers BONEGA^® EV-6J:

 

The height seating of the terminal enables two reed (rack) interconnecting strips to be put in opposite to each other and reaches double transmission load rating. The interconnecting strips, supplied by our company, have a contact - reed with dimensions 4 x 12 mm, the strip cross-section is 16 mm².

The current load capacity of such a strip with power supply away from the strip edge is 80 A, with two interconnected strips located in opposite up to 160 A; if the power supply is in the centre of the strip, the current load rating amounts to 130 A, with two interconnected strips located in opposite even up to 260 A !

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14. advantage of our miniature circuit breakers BONEGA^® EV-6J : attachment onto a DIN strip with different thickness

The miniature circuit breakers are intended to be attached onto the DIN strip EN 50 022 (width - 35 mm, thickness 0,8 - 2 mm). At European market, there are the DIN strips with higher dimension tolerances available. Our more variable design of the pawl has been fitted to those strips (also, it can correspond also with less exact performance of the DIN strips).

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15. advantage of our miniature circuit breakers BONEGA^® EV-6J : coloured control levers

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

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16. advantage of our miniature circuit breakers BONEGA^® EV-6J: the possibility to seal the lever in the ON and OFF positions

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 both positions (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, i.e. in the event of a short-circuit or overload the circuit will be shut-down (independently on the fixed positron of the lever)

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17. advantage of our miniature circuit breakers BONEGA^® EV-6J : non-anonymous manufacture

On its bottom side, every circuit breaker is stamped by signs describing the characteristics, nominal current value, month of manufacture (since the beginning of the production) and the number of the individual worker who has assembled the product. In this way, the traceability in the event of any claims is secured and the workers are motivated to bear their liability for their labour.

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18. advantage of our miniature circuit breakers BONEGA^® EV-6J : they function reliably with frequency both 50 and 60 Hz

Because of this advantage, these circuit breakers can be offered at the American market.

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19. advantage of our miniature circuit breakers BONEGA^® EV-6J : unperturbed deliveries of our miniature circuit breakers involved in various products (especially switchboards) to the whole of Europe thanks to the obtained SEMKO Certificates valid for all Europe

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20. advantage of our miniature circuit breakers BONEGA^® EV-6J : process of manufacture

Quick and flexible adaptation of the production to the customers´ requirements – a simple process with simultaneous manufacture of several types. We prepare new checkout equipment controlled by the computer, which enables a significant increase of our production capacity.

 

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21. advantage of our miniature circuit breakers BONEGA^® EV-6J : method of packing and inscription

The cases are intended for 12 modules so there are either 12 pcs. single-pole miniature circuit breakers, 6 pcs. two-poles miniature circuit breakers, 4 pcs. three-pole miniature circuit breakers or three pcs. four-pole miniature circuit breakers in one case (total weight of circuit breakers in one case amounts to approx. 1,3 kg).

Exact MCB´s weights – see Terms of Delivery – information on transport for Circuit Protection Devicess

If there is only one miniature circuit breaker type in the case, one side of the case is bar code labeled (see Fig. on the left side) describing especially the type, characteristics, nominal current value and number of pieces.

If there are more types in one case, types and number of pieces are marked on the label (see Fig. on the right side) - to be added manually, when packing. We are sure you will appreciate this type of packing not only on collection of the delivered goods, but even when being mounted at site.
 

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22. advantage of our miniature circuit breakers BONEGA^® EV-6J : fast deliveries within the Czech Republic - normal articles within 24 hours

This advantage is given both by available stock of the most asked types and by the fact that the products are manufactured at the premises of our company. This enables a good and immediate communication between the manufacture and sales departments. For fast deliveries, we use mainly the service of so-called PROFI-BALÍK (PARCEL). This system delivers the parcel to your address mostly within 24 hours and for very good prices.

For example, a delivery of the miniature circuit breakers at the rate of 23.000 CZK excl. VAT with the total weight of approx. 30 kg from Sudomerice nad Moravou to the town of As (about 500 km) with the system of PROFI-BALÍK amounts only to CZK 65,00; i.e. it loads the sale price with only 0,28% cost value (see detailed price list - link: left scroll-on- "how to buy").

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23. advantage of our miniature circuit breakers BONEGA^® EV-6J : deliveries exactly in accordance with your orders - not conditioned by purchases of whole cases

To give you an opportunity of no or only low stocks we offer deliveries exactly in accordance with your orders - not conditioned by purchases of whole packaging. To facilitate these purchases by means of facsimile or e-mail orders you can find at these sides forms (see link - left scroll - "how to buy"), which can be printed-out by your purchase departments, copied and just completed by number of pieces you need. Than you can send it per fax or e-mail. Of course, we are ready to accept your phone orders. We prepare the Internet shopping for you.