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 ABB FOCS – Fiber-Optic Current Sensors

Data Sheet 

 ABB Switzerland LtdFiber-Optic Current SensorsDept. ATPR/FOCS AustrasseCH-5300 TurgiSwitzerland

Web: www.abb.com/powerelectronicsemail: focs@ch.abb.com Tel: +41 - 58 - 589 39 39Fax: +41 - 58 - 589 30 00

© Copyright 2005 ABB. All rights reserved.Specifications are subject to change without notice.    3

   B   H   S   2   0   9   6   0   3

   Z   A   B    E

   0   1_

   R   E   V

  –

Physical Dimensions

• Sensor Electronics dimensions (W x H x D):

450 mm x 101 mm x 136 mm.• Sensor Electronics weight: 5 kg.

• Sensor fiber cable length

(Sensor Head to Sensor Electronics):

 – 15 m standard cable

 – Minimum length: 10 m

 – Maximum length: 70 m.

• Sensor Head weight: <15 kg.

• Optional control cubicle dimensions

(W x H x D):

800 mm x 1000 mm x 300 mm. Sensor Head Type Code

Standard Sensor Head dimensions (other sizes

may be available)

Head-

 Type

Code

B

out

[mm]

H

out

[mm]

B

max.

[mm]

H

max.

[mm]

C

Seg. hor.

[mm]

C

Seg. vert.

[mm]

H-1 855 855 441 441 105 105

H-2 1250 1250 836 836 500 500

H-3 1750 1250 1336 836 1000 500

H-4 1750 1750 1336 1336 1000 1000

H-5 2250 1750 1836 1336 1500 1000

H-6 2750 1750 2336 1336 2000 1000

H-7 3250 1750 2836 1336 2500 1000

Bout

Bmax

Chor

     C    v    e    r    t

     H    o    u    t

     H

    m    a    x

Ordering Information

Product Name Ordering Type Code

Main

Type Code

 Accessories

Type Code

Sensor Head

Type Code

 ABB FOCS ABB FOCS-xxx-Lxx ASVn – PLn – PBmn – CCmnopq – PNLn Hx

Example: ABB FOCS-225-L18 ASV1 – PL0 – PB10 – CC11111 – PNL0 H3

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2 3

The new ABB FOCS Fiber-Optic Current

Sensor is a family of high accuracy sensors

for industrial high current measurement

applications based on the magneto-optic

effect.

 ABB FOCS is available for uni- or bi-direc-

tional dc current measurement up to 500 kA.

With corresponding sensor head sizes, itoffers an easily installed, interference-free

alternative to the Hall effect current trans-

ducers.

Highlights

 ABB FOCS is an unique fiber optic current

measurement device designed for simplified

installation, easy commissoning, increased

accuracy, and a digital signal for greatly enhan-

ced data acquisition management and negligi-

ble power consumption.

The Sensor Head is connected to the Sensor

Electronics via a glass sensor fiber cable. This

cable cannot be detached from the Sensor

Electronics.

 All data conditioning and monitoring functions

provided by ABB FOCS, including scaling and

calibration, are designed and tested at works.

No software engineering is necessary on site.

 ABB FOCS is delivered with standard firmware

installed and ready for operation.

SensorElectronics

Control Cubicle (optional)

Sensor Fiber

Cable

Current Carrying

Busbars

Sensor Head

Performance

• Measuring range: 0 to ± 500 kA (dependingon type), 20 % overcurrent capacity.

• Accuracy (1 to 120 % of rated current):

± 0.1 % of the measured value.

• Repeatability: ± 0.02 %.

• Linearity (1 to 120 % of rated current): ± 0.1 %.

• Sampling rate: 4 kHz.

• Temperature sensitivity: <± 0.002 % / °C.

Features

• Available in different standard dimensions,

according to the dimensions of the busbar

(see Physical Dimensions).

• Sensor Electronics galvanically separated

from Sensor Head and current busbar.

• Optional control cubicle with optional

Process Panel PP210.• Sensor Electronics mounted on standard DIN

rails.

• Two analog outputs corresponding to the

measured dc current with selectable combi-

nations:

 – 0...20 mA and 0...1 V, unidirectional

 – 4...20 mA and 0.2...1 V, unidirectional

 – ± 20 mA and ± 1 V, bidirectional.

• Communication with external control

systems:

 – ABB PowerLINK, used to interface the

Sensor Electronics with an AC 800PEC

controller by means of fiber optic cables.

Standard optical module UF D128 for plas-

tic optical fiber (POF) or optional optical

module UF D130 for glass optical fiber(GOF) can be used.

 – PROFIBUS DP fieldbus (optional) to con-

nect the Sensor Electronics to any third

party external control system. The Sensor

Electronics operates as PROFIBUS DP

slave.

• Ah and kAh counter pulses: 100 Ampere-

hour and 1 kilo Ampere-hour pulses via

PROFIBUS and PowerLINK.

• DC-current protection

 – Instantaneous overcurrent detection

 – Inverse time overcurrent detection

 – Reverse current detection.

• 3 status relays with changeover contacts.

Power Supply 

• Redundant 24 Vdc input, –15 %, +20 %.

• Power consumption: <60 W.

 Ambient Requirements

• Operating temperature

 – Sensor Head: –40 to +80 °C.

 – Sensor Electronics:

 –25* to +65 °C (mounted in a cubicle with

forced air cooling)

 –25* to +55 °C (with natural air

convection).

  * With PROFIBUS module: min. temp. 0 °C.

• Storage temp.: –40 to +70 °C.

• Humidity: RH=5-95 % (compliance

 with standard EN 61131-2).

• Pollution degree: Degree 2 (compliance withstandard IEC 60664).

• Altitude: ≤ 4000 m (compliance with

standard IEC 60068-2-13).

• Degree of protection

 – Sensor Electronics: IP00, always to be

mounted in a control

cubicle

 – Sensor Head: Not applicable, to be

protected against rain

and sunlight.

• Emitted noise: <55 dB (A).

Models and Ratings

Main Type Code

kA Type

20 ABB FOCS-20

30 ABB FOCS-30

45 ABB FOCS-45

60 ABB FOCS-60

80 ABB FOCS-80

100 ABB FOCS-100

130 ABB FOCS-130

155 ABB FOCS-155

180 ABB FOCS-180

225 ABB FOCS-225

260 ABB FOCS-260

300 ABB FOCS-300

350 ABB FOCS-350

400 ABB FOCS-400

450 ABB FOCS-450500 ABB FOCS-500

Measuring rangein kA 

Length of sensorfiber cable inmeters (10–70 m)

 AB B FOC S – 10 0 – L1 0 

 Accessories Type Code

  ABB FOCS Measuring Principle 

The sensor consists of a single-ended optical

fiber and the Sensor Electronics, including light

source, optical detection circuit and digital sig-nal processor. One sensing fiber loop is moun-

ted around the current carrying busbar. 

The measured signal is independent of the par-

ticular busbar arrangement and insensitive to

magnetic stray fields from neighboring busbars.

The Sensor Electronics is galvanically isolated

from the Sensor Head and the busbars.

 Auxiliary supply

0  24 Vdc from plant mains supply1  Variable (85 – 264 Vac, 47 – 65 Hz / 90 – 350 Vdc),

additional power supply2  Special on request

PowerLink 

0  UF D128 (POF)1  UF D130 (GOF)

Profibus DP

00  None10  Slave module11 S lave module + OLM/P12 (POF)

12 S lave module + OLM/G12 (GOF)

 AS Vn – PLn – PBm n – CCm nop q – PNL n

Wall mounted control cubicle

00000  None11111  Standard

 Any 2  Customized

 m  ype o conro cu ce n  Color for control cubicleo  Lock type

 p  Size of control cubicleq  Cable Entry

Process panel

0 None1 Process Panel 210

 ABB FOCS Typical Layout

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