CTMB30 – Window-type current transformer for Cable and Bar 150A to 600A

Window-type current transformers designed for measuring current in single-phase cables up to 26 mm in diameter or bars with maximum dimensions of 30x10 mm. The range covers a wide range of primary currents, from 150A to 600A AC. They are available in accuracy classes 0.5, 1.0, or 3.0.

  • Bar (mm): 30 x 10 ; 25 x 15 ; 20 x 20
  • Round cable (mm): 26
  • Conductor type: Single-phase
  • Magnetic core type: Closed
  • Primary current: 150A to 600A
  • Secondary current: 5A (1A on request)
  • Class 3, 1, or 0.5 depending on the rating
  • Power (VA): 2.5 to 3.75 VA

Description

Technical Specifications

CT Ratio

  • From150A to 600A

Nominal Power

  • Up to 3.75VA

Accuracy Class

  • Classes 0.5, 1.0, 3.0 or 5.0

Terminal

  • Full terminal coverage, high cross-section brass terminal for added safety.

Box

  • Flame-retardant ABS/PC. Self-extinguishing.

Mounting

  • On cable or bar

Operating ambient temperature

  • -25 C° – +85 C°

Primary conductor

  • 30 x 10 mm

Round conductor

  • Diameter 26 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

Maximum system 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

RatioSeriesReferenceAccuracy Class
5.03.01.00.5
150/5CTMB30CTMB30-150/52.52.5
200/5CTMB30-200/52.52.5
250/5CTMB30-250/52.52.5
400/5CTMB30-400/53.752.5
500/5CTMB30-500/53.752.5
600/5CTMB30-600/53.752.5

Technical Specifications

CT Ratio

  • From150A to 600A

Nominal Power

  • Up to 3.75VA

Accuracy Class

  • Classes 0.5, 1.0, 3.0 or 5.0

Terminal

  • Full terminal coverage, high cross-section brass terminal for added safety.

Box

  • Flame-retardant ABS/PC. Self-extinguishing.

Mounting

  • On cable or bar

Operating ambient temperature

  • -25 C° – +85 C°

Primary conductor

  • 30 x 10 mm

Round conductor

  • Diameter 26 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

RatiotSeriesReferenceAccuracy Class
5.03.01.00.5
150/5CTMB30CTMB30-150/52.52.5
200/5CTMB30-200/52.52.5
250/5CTMB30-250/52.52.5
400/5CTMB30-400/53.752.5
500/5CTMB30-500/53.752.5
600/5CTMB30-600/53.752.5

Product Documentations

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