Download PDF
Your contact: +49 - 212 8804-0 • info@reo.de

Series WDI

AC/DC Open loop current transformers

Series WDI

Unique Selling Point


  • Measurement of direct and alternating currents
  • Voltage output
  • Low power consumption
  • No additional losses in the measuring circuit
  • High-quality UL listed insulating materials (e.g. UL94-V0)
  • Safe electrically isolated primary
    and secondary circuits
  • Good price/performance ratio
  • Low weight
  • Robust housing designs (for horizontal/vertical mounting)
  • Connections: clamps, plugs,
    flat-cable plugs or cables
  • Wide range of housings with
    various push- through openings

Description


The WDI current sensor is an open loop current transformer designed for measuring direct and alternating currents.

The primary current generates a magnetic flux and this is evaluated by means of a magnetic circuit and Hall sensor in the air gap. The signal from the Hall sensor is processed by an electronic circuit and an exact representation of the primary current is output as a voltage.

  • According to: EN50178
  • Tracking resistance: 550/600M
  • Frequency range: (-3 dB) DC...10

Applications

  • Industry
  • Renewable energy 
  • Railway engineering
  • Energy, automation and building technology


Technical Data


  • Primary rated current : 25 - 500 A
  • Frequency range : 10000 Hz

Mode of Operation

Your contact: +49 - 212 8804-0 • info@reo.de

Series WDI

AC/DC Open loop current transformers

Technical data

Type WDI

25

150

300

500

 

îPN  

Peak

25

150

300

500

[A]

îmaxPN    

Peak

0 - ±30

0 - ±180

0 - ±360

0 - ±600

[A]

îoutPN

 

±5

[mA]

RBmin

± 15 Vdc

± 30A peak=2

± 150A peak=2

± 300A peak=2

± 500A peak=2

[kΩ]

 

 

 

± 180A peak=2

± 360A peak=2

± 600A peak=2

[kΩ]

RBmax

± 15 Vdc

± 30A peak=10

± 150A peak=10

± 300A peak=10

± 500A peak=10

[kΩ]

 

 

 

± 180A peak=10

± 360A peak=10

± 600A peak=10

[kΩ]

ÛaN

Peak

±10

[V]

US

± 5%

±15

[Vdc]

IBO

(@± 15V) + IoutpN

9

[mA]

VP

r.m.s 50 Hz

3

[kV]

VW

1,2/50 µs

3

5

[kV]

Accuracy and dynamic data

FU

@IPN, TA=25°C

±0,6

[%]

FLU

@TA=25°C

≤1,0

[%]

Uo

@ IPN = 0, TA =25°C

20

[mV]

∆Uo

Io  -25°C…+70°C

60

[mV]

%/∆T

 

≤0,05

[%K]

tr

@ 90% von IPN

<25

[µs]

f

 

(-3 dB) DC...10

[kHz]

General data

TA

 

-25 bis +75

-0 bis +75

[°C]

Ts

 

-10 bis +85

[°C]

m

 

0,075

0,120

[kg]

dCp

 

4

10

[mm]

dCi

 

3

9

[mm]

 

 

Symbols

îPN = Primary rated current

VP = Insulation test voltage

f = Frequency range

îmaxPN = Max. Primary rated current

 

VW = Voltage drop

 

TA = Ambient temperature

îoutPN = Max. admissible output current

 

FU = Accuracy [50 Hz]

 

Ts = Storage temperature

RBmin = Load resistance minimal

 

FLU = Linearity error

 

m = Weight

RBmax = Load resistance maximal

 

Uo = Offset voltage

 

dCp = Creepage distance

ÛaN = RMS Rated output voltage

 

∆Uo = Offset voltage drift

 

dCi = Clearance distance

US = Operation voltage

 

%/∆T = Temperature drift

 

 

IBO = No-load current

 

tr = Response time

 

 

Your contact: +49 - 212 8804-0 • info@reo.de

Series WDI

AC/DC Open loop current transformers

Dimension drawings

Design 25 A - FS 6,3 x 0,8


Design over 25 A - MKS 1854


 

 

 

Dimensions

Type

PIN-Connection/
4polig 

h
[mm]

b
[mm]

b1/b2
[mm]

t
[mm]

DL
[mm]

p/s
[mm]

a / a1
[mm]

c1/c2
[mm]

f
[mm]

e
[mm]

l
[mm]

WDI 25

A    O   –U   +U

39

39

-

26,5

10

-

3 x 10/6,5

25/6,5

 M4

-

9

WDI 150

A    O   –U   +U

55

-

55/68

26

20,2

45/45

60/--

13,0/--

4,3

6,0x4,0

23

WDI 300

A    O   –U   +U

55

-

55/68

26

20,2

45/45

60/--

13,0/--

4,3

6,0x4,0

23

WDI 500

A    O   –U   +U

70

-

70/89

33

31,0

57/57

77/--

15,5/--

4,3

6,0x4,3

23