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

Quicker installation and easier operation

1. FAULT INDICATION BY A LEVER POSITION

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If a DPN is switched-off by the user, the lever moves from the most upper position (3 = ON) to the extreme lower position (2=OFF). A follow-up switch is led directly from the OFF position to the ON position.   WARNING: The DPN is able to indicate a fault within a circuit, which has been caused by short-circuit or overload. In that case, the lever falls down only into the central position. When moving the lever upwards, it does not put any resistance, so it seems to have a defect mechanism.   NEVERTHELESS, IT IS NO DPN – FAULT!   The task of such condition is to draw the user’s attention to the fact that the DPN protective system had to reply on any outside matter (short-circuit, overload). In that case, it is necessary to trace the cause.   You can renew the DPN activity in the following way: at first, the control lever has to be moved from the central position into the lower position (position 2 in the picture). When moving, you must overcome a little resistance put by the internal mechanism. It comes to the rearrangement (clicking) of the mechanism. In this lower position, the mechanism is ready for the follow-up switching. then, the lever is moved from the lower position into the upper position (position 3 in the picture). During that motion, you can recognize an usual resistance known by a normal switch-on of a device. .

2. Locking Bar

The design has been based on the fact, that every terminal has a so-called “flat locking bar” in its movable bottom part. This locking bar is ejecting into the space underneath the terminal, while the screw is being tightened. This process avoids the conductor to be put-in under the terminal’s stirrup (as happens by other DPNs) whereby it would not be possible to tightened the conductor into the terminal.

A unique solution avoids the difficulties with connecting the conductors onto a DPN. This principle excludes the possibility to place the conductor under the terminal by mistake. In that case, the terminal would be tightened but, unfortunately, without a conductor. If that mistake is not discovered during installation by other DPNs, latent claim defects occur frequently. Such defects occurred mostly at the end user (a conductor could be in contact with the terminal but under a higher loading of the circuit, it burned-out and the circuit was interrupted). The switchboard manufacturers had to bear additional expenses for very „simple“ removal of such defects.

The above solution does not only avoid claims but it makes the installation faster and contributes to the reliability.
 

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3. Two-Line User's Inscription

Each pole is equipped with an aesthetic transparent swing cover placed above the switching-off lever. Under that cover, there is a paper two-line inscription label put into slots. It is also possible to write on the plastic surface. The cover has an arrestment in the upper open position.

4. Convenient Short Dimensions

The extraordinary small dimensions (especially the height is only 81 mm) rank the DPN BONEGA® P-E-P to the smallest ones worldwide within the category of the breaking capacity up to 6 kA.

• the total depth from the pawl incl. the lever in OFF position is 73,23 mm
• the total depth from the DIN strip incl. the lever in OFF position is 67,23 mm
• the total depth from the DIN strip up to the surface is 61,6 mm
• the total height of the body is 81 mm + projecting pawl in operational position: 5,2 mm
• control part’s height is 45 mm
• module width 17,6 mm
• user’s inscription (A): width 15,4 mm x height 6,2 mm + thickness 0,3 mm

In the switchboard (in the covered part), remains more space for leading and connecting of conductors. This property can be appreciated especially when using those DPN in small plastic household switchboards.

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5. Casing Resistance to Gaping Upon Terminal Installation

It is a relatively usual problem on other DPN´s – upon an excessive screwing-up of the terminal, the casing opens or the terminal crosses in the casing. On some DPN´s, even the joints and thus the circuit are broken.

It is avoided on the DPN´s BONEGA® P-E-P by means of:

• plastic guides for the movable parts of the terminal, which has been chosen properly
• press-pieces in the casing body
• places for rivets, chosen properly
• plastic pins (the casing has no butt joins)

6. Attach the DPN onto a Flat Surface without DIN Strip

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	You will appreciate that advantage – a possible attachment of our DPN directly onto the flat surface without using the DIN strip - especially when repairing old switchboards. This possibility do not require any modification of the DPN.   How to do it: Screw a flat-headed screw into the flat area at the required position. Leave that screw at a distance of approx. 5 mm from the surface (not fully screwed). Onto the prepared screw put the DPN which has a corresponding cut in its upper part. Draw out the arresting pawl to its final „open“ position in the bottom part and then fasten the DPN by another screw to the flat surface through a hole in this pawl.  The connection created in such a way is unusually strong.

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7. Increased Vertical Stability on the DIN Strip

This news on the DPN BONEGA® P-E-P is a very essential improvement of vertical stability, while the conductors are connected to the device. When drawing up the terminals, the DPNs tend to incline and it is necessary to “pre-stress” them manually. The high stability has been reached by a plastic stop on the DPN bottom. After attachment of the DPN onto a DIN strip, this stop functions as the “contra-pressure” (with the torsional stress of the DPN´s body). In contrast to the competitors, the movable pawl has only the holding function. The other hand does not have to engage itself with “pre-stressing” of the DPN and can be concentrated only to hold the conductor to be connected. This measure accelerates the installation and makes is easier

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8. CONNECTION OF INPUT OR OUTPUT FROM BOTH SIDES

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

You will appreciate it especially in the switchboards with a multi-row arrangement – you can connect the input between two rows (saving of conductors and time)
 

9. Large Terminals

Within the entire range of nominal currents´ values (up to 32 A), it is possible to use a conductor with a cross-section up to 16 mm2 for a full conductor and 11 mm2 for a stranded conductor. The emergency solution by some additional terminals, when the contact resistances can occur, does not take place.   top

10. Strong Design of Terminals

The movable terminal has been made of one piece. In contrast to other DPN´s, the joint has been solved by means of an overlapping and not by a so-called “puzzle joint”. Through this overlapping, there 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 torsional stress allowed by the standard is exceeded. (more than 2 N.m)

The clip terminals themselves have in their bottom part also the cross grooves which avoid the conductor to be taken out from the terminal (after being drawn up, the conductor sinks into the grooves). Simultaneously, the contact resistances are limited. (because of the enlargement of the transmission area the burning of the conductors is not possible).

The junction of a conductor and a DPN is very rigid and reliable.

11. Locking Protection

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12. EASY LINK-UP OF THE ACCESSORIES ONTO A DPN

The plentiful accessories can be linked-up on the left side of the DPN. The interconnection of the accessories with the DPN is done, as follows:

1. 1. Remove the grey self-adhesive plate, which covers the interconnecting hole on the DPN´s left side (with nail or screwdriver) in accordance with the type of the accessories.
2. 2. Set up the DPN into the OFF position
3. 3. With an easy “snapping” into place without any tools, connect the accessories to the DPN.

The DPNs can be connected with plentiful accessories (low-voltage release, voltage release, auxiliary contacts etc.). All those elements extend the application of the DPNs by overvoltage or undervoltage protection, control, regulation, remote control, remote indication of switch-on and switch-off positions of a DPN, programming and measurement. Those combinations enable the DPNs to be applied for the control of complicated automation processes.

These elements can be mutually interconnected (e.g. DPN + undervoltage release + auxiliary indicating contact etc.), thus they can form different combinations
 

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13. ARBITRARY INSTALLATION POSITION

The construction and seating of an ejecting coil for short-circuit release affect the DPN function in various positions almost solely. In principle the question is if the weight of the coil core helps or limits the kinetics of the coil’s motion in different positions, and if the running of movable parts cannot be violated, or if a crossing cannot occur whereby the e.g. coil’s core or switching-off mechanism motion could be disabled. This result can exercise a significant influence on the fact if the DPN in an inconvenient position does not switch-off sufficiently fast in case of a short-circuit, or if it does not react at all, or if it changes its characteristic curve.

It is excluded in case of our DPNs because we have managed it in following way:

1) by design:

The design of the electromagnetic high-speed release with ejecting cage for short-circuit protection has been solved so that it has not any adjustable element. Its characteristic is given by 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 DPNs could change their presented characteristic curve by a fall, shock or bedding in another installation position.

The DPNs BONEGA®are protected against avoiding the short-circuit release to be put out of service by a suitable seating of the structure elements, especially of the ejecting coil which is seated in a unique “cradle” (see “guaranteed reliability”). This design has excluded the possibility to misalign and consequently to seize the movable core at the coil.

2) by seating itself

The ejecting coil is seated in the case so that the core’s motion direction, when ejecting, goes against the gravitational force (also upwards). From the resistance’s point of view, it is the most unsuitable position. In this position, the DPN´s parameters are set up. Therefore, any other installation position is only for the benefit of switch-off rate. The gravitational force helps for safety in any other positions.
 

14. Quick Removal of the DPN from the DIN Strip

A unique auxiliary mechanism allows an easy removal of a DPN.

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Other advantages of this solution:

• the mechanism does not fall out from the DPN body
• it has a locking in extreme positions
• it has no steel spring, so it does not subject to climate influences

15. Higher Safety Standards

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).

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16. Superior Cover Design

The clip terminals are seated in the DPN casing so that the screws of the terminals cannot fall out from the DPN body, even if they are fully unscrewed 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.

17. ATTACHMENT EVEN ONTO DIN STRIPS WITH DIFFERENT THICKNESS

The DPNs are primarily intended to be attached on the strip DIN EN 50 022 (width - 35 mm, with the thickness range 0,8 - 2 mm). In the European market, there are also the DIN strips outside the above range. The design of the movable and fixed pawls of the DPN BONEGA® P-E-P allows attaching the devices even onto less exact DIN strips.

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18. A Pawl with Unique Characteristics

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19. Extraordinary DPN's Body Strength

The rigidity s given: By a highly sophisticated selection of a point for rivets By a number of rivets By the design of the case

20. ColoUred Control Levers

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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21. Sealing Under Certain Conditions

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 impossible. In the event of short-circuit or overload, the circuit will be shutdown (independently on the fixed position of the lever). The DPN case enables the lever to be sealed independently on placing the adjacent DPN´s.

22. Smoother than any Switch you'll Find

The most excellent and balanced design of a switching mechanism. Extremely easy running when switching-on the lever even in case of multi-pole models.

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