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TECHNICAL NOTE 

 

Page  Rev.

 

Date

 

Issued

 

Approved

 

 

31 

 

 

4 

 

18/07/14 

 

 

 

 
 

 
 
 

 

 

 
 

DBC.2  “increased  safety”  terminal  blocks,  are  manufactured  according  to  the  prescriptions  given  by  
IEC / EN 60079-0, IEC / EN 60079-7 Standards and are in compliance with the ATEX 94/9/CE Directive and the IEC 
Ex Certification Scheme 
DBC.2 terminal blocks are also designed and manufactured in compliance with IEC / EN 60947-1 and IEC / EN 60947-7-1 
reference product standards. 
Terminal blocks (components) must be inserted  in  Ex e enclosures. The terminal  enclosure  assembly must 
be subjected to separate certification. 
DBC.2 terminal blocks are suited for a temperature range between - 40 and + 80 °C 
Ambient temperature range shall be between - 40 and + 40 °C 

 
 

Rail assembly composition in potentially expolosive (Ex e) environments

 

 

 

 

 

       

 

  End section 

 

 

 

 

Comb-type cross connection PTC “Easy bridge”

 

 

 

 

 
 
                                                 

Mounting rail 

 

 

End bracket      

 
 
 
 
Each rail assembly is formed by two or more adjoining terminal blocks and by END BRACKETS, that are located at the ends of 
the assembly, in a way to obtain a compact and single arrangement. 
As the back of each terminal block performs the function of insulating wall for the adjoining terminal block, an END SECTION is 
necessary to close and provide appropriate insulation to the first terminal block forming the assembly. 
Rail  assemblies  can  be  subdivided  into  groups  by  interposing  COLOURED  PARTITIONS,  in  order  to  ease  the  location  of 
different circuits 
Each terminal block can be connected to adjoining elements by means of CROSS CONNECTION of the comb type. 
Adjoining terminal blocks can be visually separated by interposing a COLOURED PARTITION, having a thickness of 1,5 mm.  
Adjoining jumpers between different phases should be electrically separated by interposing an END SECTION type DBC/PT. 
Multiple cross connections can be performed between terminal blocks, by means of a comb-type CROSS CONNECTION the 
use  of  which  enables  also  to  obtain  parallel  extending,  pole  skipping,  staggered,  and  parallel  skipping  cross-connection 
schemes 

 

 

Ex e Instruction Manual N° 31

 

Содержание DBC.2

Страница 1: ...ning terminal blocks and by END BRACKETS that are located at the ends of the assembly in a way to obtain a compact and single arrangement As the back of each terminal block performs the function of insulating wall for the adjoining terminal block an END SECTION is necessary to close and provide appropriate insulation to the first terminal block forming the assembly Rail assemblies can be subdivide...

Страница 2: ...lel skipping Ex e rated voltage Vac Ex e rated voltage Vac Ex e rated voltage Vac Ex e rated voltage Vac Ex e rated voltage Vac DBC 2 upper level 250 250 250 250 250 DBC 2 lower level 250 250 250 250 250 Notes rated voltage values can be subjected to a 10 tolerance as listed in Table 1 of IEC 60079 7 Std TERMINAL BLOCK JUMPER MULTIPLE COMMONING BAR SCREW AND SLEEVE CURRENT OF THE JUMPER A DBC 2 PT...

Страница 3: ...ks to their coupling it is possible to apply the correct contact pressure By acting on the tightening screw the collar tightens the conductor against the conducting body which is manufactured in tin plated copper With the clamping yoke tightening system a gas proof particularly safe connection is guaranteed Thanks to the force applied during the tightening process the overlapped threaded parts sys...

Страница 4: ...n the insulating body the name of the product and the electrical characteristics ATEX Marking 0722 I M 2 Ex e I Mb II 2G Ex e IIC Gb 0722 number of Notifying Body CESI for the ATEX surveillance I M2 group I mines category M2 II 2 G group II surface category 2 G gas Ex e increased safety protection mode IIC gas group Gb EPL I group I mines Mb EPL V rated voltage The CE Marking indicates the Conform...

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