CTK58
Opening-type current transformer for Cable and Bar from 250 to 1600A

Current transformer with an opening core, closed by a screw-nut system. It is suitable for measuring current in single-phase cables up to 50 mm in diameter or bars with dimensions up to 80x50mm. The range covers a wide range of primary currents, from 250A to 1600A AC. They are available in precision classes from 0.5 to 3.0.

  • Bar (mm): 80 x 50 ;
  • Round cable (mm): 50
  • Conductor type: Single-phase
  • Magnetic core type: Closed
  • Primary current: 250 A to 1600A
  • Secondary current: 5A (1A on request)
  • Class 0.5, 1.0, or 3.0 depending on the size
  • Power (VA): 2.5 to 10 VA

Description

Technical Specifications

Transformation ratio

  • From 250/5A to 1600/5A

Nominal Power

  • Up to 30VA

Accuracy Class

  • Class 3, Class 1.0, or Class 0.5 depending on the size

Terminal

  • Screw-covered terminals

Box

  • Polycarbonate/PC Self-extinguishing

Mounting

  • On cable or bar

Operating ambient temperature

  • -25 C ~ +85 C

Primary conductor

  • 50 x 80 mm

Round conductor

  • Diameter 50 mm

Number of inputs

  • 1 input

Short-time thermal current

  • Ith = 60 * In

Continuous thermal current

  • Id=1 * In

Nominal frequency

  • 50Hz … 60Hz

Overvoltage current limiting factor

  • FS 5

Test voltage

  • 3kV 1min

System Max Voltage

  • 0.72kV

Applicable Standards

  • IEC 60044-1

  • IEC 61869-2

  • VDE 0414-1

  • DIN57414

  • BS3938

  • BS7626

  • EN 61869-2

Diagrams and Dimensions

Reference Tables

Opening
(mm)		 Series Ratio (A) Accuracy Class Power (VA)
50 x 80 CTK58-250/5 250/5A 3 2.5
CTK58-300/5 300/5A 3 2.5
CTK58-400/5 400/5A 3 2.5
CTK58-600/5 600/5A 1 5
CTK58-800/5 800/5A 1 5
CTK58-1000/5 1000/5A 1 5
CTK58-1250/5 1250/5A 1 5
CTK58-1600/5 1600/5A 0.5 10

Technical Specifications

Transformation ratio

  • From 250/5A to 1600/5A

Nominal Power

  • Up to 30VA

Accuracy Class

  • Class 3, Class 1.0, or Class 0.5 depending on the size

Terminal

  • Screw-covered terminals

Box

  • Polycarbonate/PC Self-extinguishing

Mounting

  • On cable or bar

Operating ambient temperature

  • -25 C ~ +85 C

Primary conductor

  • 50 x 80 mm

Round conductor

  • Diameter 50 mm

Number of inputs

  • 1 input

Short-time thermal current

  • Ith = 60 * In

Continuous thermal current

  • Id=1 * In

Nominal frequency

  • 50Hz … 60Hz

Overvoltage current limiting factor

  • FS 5

Test voltage

  • 3kV 1min

System Max Voltage

  • 0.72kV

Applicable Standards

  • IEC 60044-1

  • IEC 61869-2

  • VDE 0414-1

  • DIN57414

  • BS3938

  • BS7626

  • EN 61869-2

Diagrams and Dimensions

Reference Tables

Opening
(mm)		 Series Ratio (A) Accuracy Class Power (VA)
50 x 80 CTK58-250/5 250/5A 3 2.5
CTK58-300/5 300/5A 3 2.5
CTK58-400/5 400/5A 3 2.5
CTK58-600/5 600/5A 1 5
CTK58-800/5 800/5A 1 5
CTK58-1000/5 1000/5A 1 5
CTK58-1250/5 1250/5A 1 5
CTK58-1600/5 1600/5A 0.5 10

Product Documentations

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