P-E-P (Perfect Electric Protector)
Improvements that increase reliability:
It enables us to provide a three year warranty.
Every MCB is thoroughly tested.
The high quality of our product is due to a combination of materials, design and thorough testing of each miniature circuit breaker.
Increased responsibility during assembly.
Every circuit breaker is stamped 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 workers are motivated to bear the liability of their labor.
switching extends the mechanical
and electrical life of BONEGA® P-E-P MCB's.
A worldwide unique, recently patented principle of the instantaneous switching where the forces are transmitted only into the middle of segments – therefore no crossing occurs (no world manufacturer has developed that solution yet). This solution has a big influence on extension of both mechanical and electrical lifetimes in connection with the number of switching cycles.
This unique principle of instantaneous switching of contacts is based on the following facts: even when the MCB lever is stretched very slowly, during the first stage the contacts inside the MCB only come near to each other to a distance which cannot create the condition for electric arc. In this moment the „coming-near“ is interrupted, even if the lever continues to be stretched (switched-on). In this moment the second stage begins – i.e. pre-stressing only inside the instantaneous mechanism when the contacts does no come near to each other more, but the lever is moved. Upon the pre-stressing, stated in advance, the third stage begins – i.e. a heavy high-speed switching of internal contacts. This switching is, however, fully independent on the rate of contact lever motion.
The above principle offers the following advantages:
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There is no gaping of the MCB
or cross threading of the terminal in the casing.
|It is a usual problem on other MCB´s – upon tightening of the terminal, the casing opens or the terminal cross threads in the casing. On some MCB´s, even the joints and thus the circuit are broken.|
It is avoided on the MCB´s BONEGA® P-E-P by means of:
Even with excessive
it is not possible to strip the thread.
The movable terminal has been made of one piece. In contrast to most other MCB´s, the joint has been solved by means of an overlapping and not by a so-called “puzzle joint”. Through this overlapping goes a screw. It has a double thread length available, which restricts the breaks – “stripping” the thread essentially. The possibility to break it when being mounted is fully excluded even if the torque allowed by the standard is exceeded (more than 2 N.m).
In the bottom part of the clip terminals is the cross grooves which avoid the conductor to be taken out from the terminal (after tightening, the conductor sinks into the grooves). Simultaneously, the contact resistances are limited. (because of the enlargement of the transmission area the burning of the conductor is not possible).
The junction of a conductor and BONEGA® P-E-P MCB is very rigid and reliable.
|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.|
The reliability of
BONEGA® P-E-P MCB is
even if the operational temperatures vary rapidly.
The mechanism's function is not affected by thermal dilatation. The design allows possible plays (by dilatation, shock, wearing) to be accepted without any affect on the function of movable parts, such as switching mechanism, movable contact, ejecting coil, indication etc. This unique solution improves the quality essentially but especially it warranties the reliability under different, even very extreme operational conditions.
The BONEGA® P-E-P MCB's can be used in equipment with strong vibration (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 the parts are made of one piece.
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Extended mechanical reliability of the multi-module design.
|The casing design ensures strength not only of a single-module type,
but even in case of multi-module circuit breakers.
thanks to higher dimensional
accuracy of components.
The press pieces of all parts, except for the lever, are made from two-side molds. Because of this technology, we have reached much higher dimensional accuracy, thus higher quality, resulting in higher operational reliability.
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Export Manager: Michal Hudeček, tel: +420 605 518 724, [email protected]
Sales Department: - Mrs Adriana Jamná, fax +420 518 335 216, email : [email protected], 696 66 Sudoměřice nad Moravou 302
, Potoční 302, 696 66 Sudoměřice nad Moravou, Czech Republic, [email protected], tel. +420 605 518 724