CTK816 – Open-core current transformer for Cable and Bar from 1000 to 5000A

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 dimensions of up to 160x80mm. The range covers a wide range of primary currents, from 1000A to 5000A AC. They are available in accuracy classes of 0.5 or 1.0.

Bar (mm): 160 x 80
Round cable (mm): 80
Conductor type: Single-phase
Magnetic core type: Closed
Primary current: 1000 A to 5000A
Secondary current: 5A (1A on request)
Class 0.5 or 1.0 epending on the size
Power (VA): 10 to 30 VA

Technical Specifications

Transformation ratio

From 1000/5A to 5000/5A

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 160 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 160	CTK816- 1000/5	1000/5A	1	10
	CTK816- 1250/5	1250/5A	1	10
	CTK816- 1600/5	1600/5A	0.5	15
	CTK816- 2000/5	2000/5A	0.5	15
	CTK816- 2500/5	2500/5A	0.5	15
	CTK816- 3000/5	3000/5A	0.5	30
	CTK816- 4000/5	4000/5A	0.5	30
	CTK816- 5000/5	5000/5A	0.5	30