Protection Class CT

Protection Class CT

Variant in Current Transformer: Protection Class CT

Protectioninal currents from 100 A to 300 A, secondary nominal current 5 A, 2 A or 1 A, in protection classes 5P5 and 10P5. Protection current transformers are used to control protective relays that have the role of disconnecting downstream circuits in the event of a current surge.

Proportional transmission behaviour of the transformer up to a multiple of the nominal current is required for the reliable function of this relay. The dimensioning of this transformer design safeguards proportional current transmission up to a multiple of the nominal current determined by the protection class.

Standard Features:
  • Two Types : Normal protection CTs and Special Purpose Protection Cts..
  • Used to control protective relays.
  • Control role of disconnecting downstream circuits in the event of a current surge.
  • Proportional transmission behaviour.
  • Operation over wide range of currents.
  • Class 5P, 10P and 15P current transformers..
  • Protectioninal currents from 100 A to 300 A.
  • Secondary nominal current 5 A, 2 A or 1 A.
  • Designed as per IS/IES/ANSI Standards..
  • Provide protection for feeders and motors etc.
Feature Value
Input Specifications
Current Rating 1 A to 6000 A
Rated Sec . Current 5A or 1 A or as required
Test Voltage 3 KVeff , 50 Hz 1 min / as applicable
System Voltage 720 V max
Outer Insulation Resin / Non - flammable Plastic / Tape (PVC or Fiber Glass)
Protection Class IP 65 ( Resin ) / Ip20
Thermal Short Circuit Current ( Ith ) 60 X In
Rated Continuous Thermal Current ( CTC ) 1.2 In

Note: Technical Specifications and illustrations are subject to change arising out of continuous Product Development.

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