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P-E-P (Perfect Electric Protector) |
Improvements that increase security and protection:
1. Extraordinary High-Speed Break 2. High Breaking Capacity (Short-Circuit Resistance) 3. Reduction of Undesirable Power During a Short-Circuit 5. World-wide Unique Extinguishing Chamber 10. Colored and Black Control Levers 11. The possibility to seal the lever in the on or off positions
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The sooner is the entire short-circuit process terminated, the lower is the damage of connected devices and wiring.
An extraordinary high breaking rate from the moment of a short-circuit arising up to its termination amounts to max. 10 ms (with a maximum loading). Other producers usually vary within the values which are at least 2 – 5 times higher.
The BONEGA® P-E-P DPN'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 DPN's, the arc voltage is equal or lower.
The high-speed switch-off consists of three stages:
The principal advantage of our DPN´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 DPN has not disconnected the circuit yet.
Conclusion:
A significant advantage of our DPNs consists in an extraordinary high speed during the first two stages. The third stage is also very fast in our case, but it is not so significant for the entire speed. Within this last stage, it is more significant the fact that the chamber is so exact that the arc does not “jump out” the chamber in any direction (especially, it does not return onto the contacts at all).
The BONEGA® DPNs can be used even under the most demanding short-circuit conditions.
Our primacy consists in the breaking capacity of 6 kA up to the highest value of 32A, even with the curve “C” pursuant to CSN EN 60898. The hitherto highest reached breaking capacity for DPN does not exceed 4,5 kA.
Our world-wide uniqueness consists in integration of all following phenomena with the kept breaking capacity of 6 kA:
The essential difference, as compared to the DPNs of several producers,
consists in the reached range of nominal currents, which is reached with the
mentioned breaking capacity (6 kA, 4,5 kA, 3 kA, ...). We are preparing the
upper limit of the nominal currents, which can our DPNs reach within the
breaking capacities exceeding 6 kA.
II.) Another important difference consists in the reached standard, in
accordance with which the producer has achieved 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 DPN 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 DPN. The reaction of the user in a household often is that he tries
to switch-on the DPN 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 DPN breaks again, he begins to trace the cause
immediately.
Thus notice at other producers, according to which standard and up to which nominal current values they mention the breaking capacity. You can be surprised even by the results of worldwide-accredited producers.
The above parameters are reached thanks to the distinguishing chamber that is
one of our two worldwide-acknowledged Czech patents within the DPN range. It
concerns its extraordinary property when its width could be just 6 mm.
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 DPN, which is often marginalized by the public.
The protection quality by a DPN is also conditioned by the amount of power that “flows” through the device during a short-circuit. Its amount is given by the relation: E = I2.t. As resulting from the mentioned relation, the high breaking rate of a DPN reduces even that spurious power.
The standard CSN 60898+A1/A11 states the power limits based of which the individual categories are assigned to the protective devices. The category (class) is mentioned on a DPN in the frame below the breaking capacity.
Our DPNs 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 6 kA.
The following tables show the requirements of the standard for the protective
elements up to 16A and above 16A up to 32A incl., at various nominal
short-circuit capacities.
| PERMITTED I2T VALUES PURSUANT TO CSN 60898+A1/A11 FOR DPN WITH NOMINAL CURRENT UP TO 16 A INCLUDING | |||||
| Nominal short-circuit capacity (A) |
POWER LIMITATION CLASSES |
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1 |
2 |
3 |
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max. I2t A2s |
max. I2t A2s |
max. I2t A2s |
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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 | |
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(the values written in bold digits are valid for our DPN BONEGA®, P-E-P series ): |
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| PERMITTED I2T VALUES PURSUANT TO CSN 60898+A1/A11 FOR DPN WITH NOMINAL CURRENT EXCEEDING 16 A UP TO 32 A INCL. | |||||
| Nominal short-circuit capacity (A) |
POWER LIMITATION CLASSES |
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1 |
2 |
3 |
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max. I2t A2s |
max. I2t A2s |
max. I2t A2s |
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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 | |
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(the values written in bold digits are valid for our DPN BONEGA®, P-E-P series ): |
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The DPNs BONEGA® P-E-P cannot be locked from outside.
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On -red I - ON |
As one of few DPNs, the DPNs BONEGA®have an indication of the contact condition. 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 DPNs have that indication covered with a transparent plastic sight-glass with a lens (magnifying) effect. |
Reasons:
This property protects the electro installation companies against claims, which are really caused by an end user, who can be proved wrong with difficulties.
The extinguishing chamber affects the breaking rate and breaking capacity essentially.
The extinguishing chamber is of a fully new patent-protected conception that allows:
The characteristic curve of a DPN can be changed neither by a falling-down, nor by a shock.
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The electromagnetic speed ejecting-cage release for protection against a short-circuit has been designed not to have any adjustable element. The characteristic curve of a DPN “B” or “C”) is given by the selection of the coil copper-wire’s diameter, the number of threads and the spring bias voltage in the coil core. This design excludes the possibility our DPNs to change the given characteristic curve by a falling-down or a shock in any way. |
The DPN BONEGA®can be used within the equipments with strong vibrations (e.g. railway wagons, site switchboards).
At other DPNs, 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
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The DPNs BONEGA®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 has simply been reduced significantly. The elements are interconnected by means of a modular design, or the parts are made of one piece.
The casing design protects against an injury by current when being touched by a finger.
By a suitable casing design, all the terminals are protected against a finger touch or penetration of strange small objects (it complies with the protection IP 20).
A DPN can be used even within more complicated projects.
A wide scale of current values and characteristic curves B and C enables our DPN´s to be put together to various safety cascades. Because of the above, the desired selectivity can be reached. The selectivity means a coordination of two successive breaking devices so that just the disabled wiring part can be switch-off upon a failure.
The colored levers increase the clear arrangement and comply with the requirements of power-supplying plants.
We supply both the color version pursuant to the values of nominal currents (which correspond to the indication of cap fuses) as a standard, and the black version upon requirement.
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The possibility to seal it for special purposes.
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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 DPN. In the event of a short-circuit or an overload the circuit will be shut-down (independently on the fixed position of the lever and without any restrictions)
The DPN casing enables the lever to be sealed without any influence onto the location of the adjacent devices. |
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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
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Potoční 302, 696 66 Sudoměřice nad Moravou, Czech Republic,