CTK88
Open-core current transformer for cable and bar from 400 to 2000A

Current transformer with an opening core, closed by a screw-nut system. It is suitable for measuring current in single-phase cables up to 80 mm in diameter or bars with maximum dimensions of 80x80mm. The range covers a wide range of primary currents, from 400A to 2000A AC. They are available in accuracy classes ranging from 0.5 to 1.0.

  • Bar (mm): 80 x 80 ;
  • Round cable (mm): 80
  • Conductor type: Single-phase
  • Magnetic core type: Closed
  • Primary current: 400A to 2000A
  • Secondary current: 5A (1A on request)
  • Class 0.5 or 1.0 epending on the size
  • Power (VA): 2.5 to 10 VA

Description

Technical Specifications

Transformation ratio

  • From 250/5A to 2000/5A

Nominal Power

  • Up to 30VA

Accuracy Class

  • Class 1.0 or Classe 0.5 depending on the size

Terminal

  • Screw-covered terminals

Box

  • Polycarbonate. Self-extinguishing

Mounting

  • On cable or bar

Operating ambient temperature

  • -25 C ~ +85 C

Primary conductor

  • 80 x 80 mm

Round conductor

  • Diameter 80 mm

Number of inputs

  • 1 input

Short-time thermal current

  • Ith = 60 kA

Continuous thermal current

  • Id=1 * In

Nominal frequency

  • 50Hz … 60Hz

Overvoltage current limiting factor

  • FS 5

Test voltage

  • 3kV for 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)
80 x 80 CTK88-400/5 400/5A 1 2.5
CTK88-500/5 500/5A 1 2.5
CTK88-600/5 600/5A 1 2.5
CTK88-800/5 800/5A 1 10
CTK88-1000/5 1000/5A 1 10
CTK88-1200/5 1200/5A 1 10
CTK88-1250/5 1250/5A 1 10
CTK88-1600/5 1600/5A 0.5 10
CTK88-2000/5 2000/5A 0.5 10

Technical Specifications

Transformation ratio

  • From 250/5A to 2000/5A

Nominal Power

  • Up to 30VA

Accuracy Class

  • Class 1.0 or Classe 0.5 depending on the size

Terminal

  • Screw-covered terminals

Box

  • Polycarbonate. Self-extinguishing

Mounting

  • On cable or bar

Operating ambient temperature

  • -25 C ~ +85 C

Primary conductor

  • 80 x 80 mm

Round conductor

  • Diameter 80 mm

Number of inputs

  • 1 input

Short-time thermal current

  • Ith = 60 kA

Continuous thermal current

  • Id=1 * In

Nominal frequency

  • 50Hz … 60Hz

Overvoltage current limiting factor

  • FS 5

Test voltage

  • 3kV for 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)		SeriesRatio (A)Accuracy ClassPower (VA)
80 x 80CTK88-400/5400/5A12.5
CTK88-500/5500/5A12.5
CTK88-600/5600/5A12.5
CTK88-800/5800/5A110
CTK88-1000/51000/5A110
CTK88-1200/51200/5A110
CTK88-1250/51250/5A110
CTK88-1600/51600/5A0.510
CTK88-2000/52000/5A0.510

Product Documentations

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