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Current Transformers (CT)

A comprehensive range of measuring ring current transformers for installation where reliability, accuracy and quality are required.

Construction

High grade silicon iron cores are carefully selected,then insulated and protected by a polypropylene covering on which the secondary winding is toroidally wound by precision winding machines. Multi layers of polyester and PVC are then applied to provide a tough moisture resistant coating.

Technical data:

: 0,2…3 : max. 20 VA : 720 V. : 50-60 Hz. : Upto 4000A : 5 A (or 1 A on request). : FS 5 : -20 … +45°C. : 4 kV eff, 50 Hz, 1 min. : IP 00

Burden Requirements:

  • Ammeter : 1VA
  • Current coil of Watt/Var meter : 1.5 VA
  • Current coil of energy meter : 2.0 VA
  • Current coil of p.f. indicator : 2.5 VA
  • Current coil of Trivector meter : 3.0 VA
  • Leads between CT & meter : 2.0 VA
Benefits
  • Reduction of high currents for ease of metering
  • Wide operating temperature –10° C to +50° C
  • Steel mounting feet supplied
Metering Class CT:
In general the following applies:

Accuracy Class Requirements:

  • 0.1or 0.2 for precision measurements.
  • 0.5 for high grade kilowatt hour meters.
  • 1.0 for commercial grade kilowatt hour meters
  • 1 or 3 for general industrial measurements.
  • 3 or 5 for approximate measurements

SELECTION CHART (Kindly specify Accuracy Class required)

Ratio  VA  ID (mm)  OD(mm)  Width(mm) 
50/5A 10 30 70 50
60/5A 10 30 70 50
75/5A 10 30 70 50
100/5A 10 30 70 50
150/5A 10 30 70 50
200/5A 10 45 80 35
250/5A 15 45 80 30
300/5A 15 55 80 35
400/5A 15 60 90 35
500/5A 15 60 100 40
600/5A 15 60 100 40
800/5A 15 60 100 40
1000/5A 30 60 100 40
1200/5A 30 60 100 40
1600/5A 30 60 100 40
2000/5A 30 60 100 40
2500/5A 30 60 100 40
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