CTMB80 – Window-type current transformer for Cable and Bar of 1000A to 1600A

Window-type current transformers designed for measuring current in single-phase cables up to 65 mm in diameter or bars with maximum dimensions of 80x10mm. The range covers a wide range of primary currents, from 1000A to 1600A AC. They are available in accuracy classes of 0.1, 0.2S, to 1.0.

Bar (mm): 80 x 10 ; 60 x 30 ; 50 x 50
Round cable (mm): 65
Conductor type: Single-phase
Magnetic core type: Closed
Primary current: 1000 A to 1600A
Secondary current: 5A (1A on request)
Class 0.1, 0.2S, 0.2, 0.5S, 0.5, or 1.0 depending on the size
Power (VA): 7.5 to 30 VA

Technical Specifications

CT Ratio

From 1000A to 1600A

Nominal Power

Up to 30VA

Accuracy Class

Classes 0.1, 0.2s, 0.2, 0.5s or 0.5

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

80 x 10 mm

Round conductor

Diameter 65 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 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
Ratio	Series	Reference	1.0	0.5	0.5s	0.2	0.2s	0.1
1000/5	CTMB80	CTMB80-1000/5	15	15	15	10	7.5
1250/5		CTMB80-1250/5	15	15	15	15	7.5	7.5
1600/5		CTMB80-1600/5	15/30	15/30	15	15	15	15