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Current Transformers by size

Type Maximum
inner hole dimensions		 Transformer width
60 mm  85 mm 90 mm 130 mm
Bar   CLB 0.6  /  1-10 A CLA 1 S /  1-15 A CLB 0.9  /  1-15 A  
    CLA 1  /  10-250 A    
Ring 20 x 10 mm CLB 2.6  /  50-500 A      
Ø   22 mm CLB 22R.6  /  50-600 A      
30 x 10 mm CLB 3.6  /  50-750 A   CLB 3.9  /  50-300 A  
32 x 10 mm CLB 32.6  /  75-750 A      
40 x 10 mm CLB 4.6  /  100-800 A CLA 2  /  50-800 A CLB 4.9  /  50-800 A  
50 x 10 mm     CLB 5.9  /  75-1000 A  
60 x 10 mm     CLB 6.9  /  125-1000 A  
80 x 10 mm       CLA 3  /  300-2000 A
100 x 10 mm       CLB 10  /  400-3000 A
 Atypical design Atypical designs CT are not size constrained and their parameters can be adjusted according to the customer's needs.
           

Specifications and Application type CLA a CLB

  • highest voltage for equipment 720 V
  • power frequency withstand voltage 3 kV
  • rated frequency 50 - 60 Hz
  • rated primary current I1n = 1 - 3000 A
  • rated short-time thermal current Itherm = 60 × I1n (1 sec)
  • rated dynamic current Idyn = 150 × I1n

A completely enclosed mini current transformer, most appropriate for use in low-voltage switchboard plants for indoor installation. It can be used for the connection of ammeters and current circuits of meters, protective and other measuring devices.

Core and secondary winding are housed in a black case of self-extinguishing material. Insulation class E, max. constant temperature 120 °C.

The secondary terminals are sealable.

The transformer can be mounted in all position on busbars of square or round cross-section cross-section. It can also be mounted on the specially made frames by means of four screws in such a way that the primary conductor freely passes through the transformer hole.

The transformers are made according to the standards ČSN 35 1360, ČSN 35 1301, ČSN EN 60044-1, ČSN EN 61869-2 (Czech Standards) and of course IEC 60044-1 and IEC 61869-2. Each transformer is thoroughly tested in the factory. The factory test certificate is provided upon request.

MT–měřicí transformátory, spol. s r.o.
Podolí 474
664 03 Podolí u Brna
Czech republic

E-mail: mtbrno@mtbrno.cz
Phone: +420 545 576 049

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