CTMB40
Window-type current transformer for Cable and Bar 400A to 800A

Window-type current transformers designed for current measurement in single-phase cables up to 30 mm in diameter or bars with maximum dimensions of 40x10 mm. The range covers a wide range of primary currents, ranging from 200A to 800A AC. They are available in accuracy classes of 0.2S to 1.0.

  • Bar (mm): 40 x 10 ; 30 x 20 ; 15 x 30
  • Round cable (mm): 30
  • Conductor type: Single-phase
  • Magnetic core type: Closed
  • Primary current: 200A to 800A
  • Secondary current: 5A (1A on request)
  • Class 0.2S, 0.2, 0.5S, 0.5, or 1.0 depending on the size
  • Power (VA): 5 to 10 VA

Description

Technical Specifications

CT Ratio

  • From 200A to 800A

Nominal Power

  • up to 10VA

Accuracy Class

  • Classes 0.2s, 0.2, 0.5s, 0.5 or 1.0

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

  • 40 x 10 mm

Round conductor

  • Diameter 30 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

Ratio Series Reference Accuracy Class
1.0 0.5 0.5s 0.2 0.2s
400/5 CTMB40 CTMB40-400/5 5/10 5/10 5
500/5 CTMB40-500/5 5/10 5/10 5 5
600/5 CTMB40-600/5 5/10 5/10 7.5 7.5 7.5
800/5 CTMB40-800/5 10 10 10 10 7.5

Technical Specifications

CT Ratio

  • From 200A to 800A

Nominal Power

  • up to 10VA

Accuracy Class

  • Classes 0.2s, 0.2, 0.5s, 0.5 or 1.0

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

  • 40 x 10 mm

Round conductor

  • Diameter 30 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
1.00.50.5s0.20.2s
400/5 CTMB40 CTMB40-400/5 5/10 5/10 5
500/5 CTMB40-500/5 5/10 5/10 5 5
600/5 CTMB40-600/5 5/10 5/10 7.5 7.5 7.5
800/5 CTMB40-800/5 10 10 10 10 7.5

Product Documentations

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