Products
   
 
 
AC Synchronous Motor  
C. V. T. (Constant Voltage Transformer / Ferroresonant)  
C.T.(Current Transformer)  
   
 
  C.T.(Current Transformer)  
     
 
Current Transformer
 
     
 

Current transformers are made in a range of measuring and protection type considering quality, accuracy and reliability as prime factors. VOLTAMP Current transformers can be used for metric and imperial size bars. Current Transformers are made from high magnetic performance prime CRGO Silicon Electrical Steel. The performance of the core is checked to meet final parameters such as ratio, rating and accuracy. The current transformer is finally completed by placing PVC washers on top and bottom and then taped closely with polyester film and polyvinyl chloride tape. Proper lugs are provided on secondary terminals with S1 and S2 markings. Anodised Name plate is slipped within outer tape mentioning specifications and P1, P2 direction.

In addition to the above we can offer Current Transformers to your requirement with various combinations of

  • Ratios
  • Burden
  • Accuracy Class
  • Type
 
 

*Subject to technical feasibility.

 
   
  Application  
   
 
  • Suitable for Ammeters .
  • Wattmeters.
  • Power Factor meters and Protective Relays.
 
   
  Suggested Burden Guide  
   
 
  • Moving Iron Ammeters 1.5 VA to 5 VA
  • Recording Ammeters 2 VA to 10 VA
  • Recording Thermal Demand Wattmeters0.7 VA to 1.4 VA
  • KWH Meters0.3 VA to 0.6 VA
  • Thermal Demand Ammeters3 VA
  • Thermal Maximum Demand Ammeters4 VA to 8 VA
  • Cable 7/029 5 Amp Secondary 0.05 VA/ft
  • Cable 7/029 1 Amp Secondary 0.002 VA/ft
 
   
  Specification  
   
 
  • Designed in accordance to : BS 3938, IS 2705 and IEC 185
  • Dielectric Test : 2500 V/4000 V r.m.s.
  • Temperature range : -40 to + 70C Ambient
  • Rated Frequency : 50/60 Hz
  • Line Voltage : 660/11000 Volts max.
  • Test Voltage : 2500 Volts / 4000 V r.m.s.
 
 
   
  Limits For Accuracy Classes  
   
  0.1 TO 5.0
(Clauses 3.21 and 4.1 and 3.2.2) ISS 2705/92 :
 
   
 

Accuracy
Class

± Percentage Current (Ratio) Error
At Percentage of Rated Current

± Phase Displacement in Minutes
At Percentage of Rated Current

 

5

20

50

100

120

5

20

100

120

0.1

0.4

0.2

Not
Applicable

0.1

0.1

15

8

5

5

0.2

0.75

0.35

0.2

0.2

30

15

10

10

0.5

1.5

0.75

0.5

0.5

90

45

30

30

1.0

3.0

1.5

1.0

1.0

180

90

60

60

3.0

 

 

3.0

 

3.0

 

 

 

 

5.0

 

 

5.0

 

5.0