Circuit Protection Devices

Interconnecting strips

List of Contents:

• Characteristics
• The differences between forked and reed strips
• Technical data
• Overview of interconnecting reed strips
• Overview of interconnecting forked strips

CHARACTERISTICS

The interconnecting strips enable more MCB´s, switches and protective switches to be interconnected between each other. With the interconnection of our current protective switches BONEGA®EV-6P with the MCB´s BONEGA® P-E-P or BONEGA®EV-6J, you can assemble an associated electrical device which is always cheaper than the compact devices with the same function. We supply the copper 1, 2, 3, 4-pole interconnecting “reed” strips with insulation, and the 1-pole and 3-pole forked types.

The insulation is made of ABS see Comparison of ABS, the self-extinguishing ABS VO and PVC  (in  )

the differences between forked and reed strips

Forked strips:

• advantages
  • being put under the screw head, into the upper part of a double terminal, they do not take any space in the bottom part of the terminal. Because of what is written above they enable an unperturbed connection of input conductors.
     
• disadvantages
  • when tightening the terminal screws, the forks can distend (only by some suppliers when it concerns a cross-section of only 10 mm² and soft cupper), thus the transmission area as well as current load rating is reduced. (sometimes such an imperfect connection can cause the “burning-out” of the connection resulting in a full devaluation of the MCB´s or devices interconnected in that way)
  • with other types of MCB´s which do not have a sufficient insulation between separate terminals, the inter-phase short-circuit can occur under specific circumstances. The MCB´s BONEGA® P-E-P can avoid that phenomenon safely (see protection against an inter-phase short-circuit).
     

Reed (rack) ones:

• advantages
  • a rack (reed) is also the pressure (second) area of the terminal pressing onto the out-in conductor, thus it limits any possible contact resistance to the minimum
  • if you use two interconnecting strips with outputs at the edge of the strips, the height seating of the terminal enables those two interconnecting strips to be put in opposite to each other and to reach a double transmission load rating
  • e.g. the current load capacity of such a strip with an cross-section 16 mm² with the power supply away from the strip edge is 80 A.; with two interconnected strips located in opposite and supplied away from the strip edge it is up to 160 A; with two interconnected strips located in opposite even up to 260 A
     
• disadvantages
  • being put into the bottom part of the terminal, they take a part of its cross-section, thus they make the connection of input conductors more complicated

The strips are supplied either with the cross-sections of 16 mm² or 10 mm², always with insulating material made of self-extinguishing ABS-VO. The copper contacts (reeds) are located closed at the strip edges. See our offer of MCB´s accessories.

The single-pole MCB´s can be interconnected also in the so-called “German” way, i.e. with a special strip without any insulation. When accepting this method, it is necessary to break off both barriers against the inter-phase short-circuit (see protection against an inter-phase short-circuit).

TECHNICAL DATA

Parameters of the interconnecting strip ampere load
		1 phase /two interconnected strips						2,3 and 4 phase / two interconnected strips
Interconnecting strip’s cross-section in mm2		10	12	16	20	25	36	10	16	25	36
Power supply from the strip’s edge, max. current Is = A		63/ 126	65/ 130	80/ 160	90/ 180	100/ 200	130/ 260	63/ 126	80/ 160	100/ 200	130/ 260
Power supply in the middle of the strip Max. current Is = A		100/ 200	110/ 220	130/ 260	150/ 300	180/ 360	220/ 440	100/ 200	130/ 260	180/ 360	220/ 440

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OVERVIEW OF INTERCONNECTING REED STRIPS

OVERVIEW OF INTERCONNECTING FORKED STRIPS

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