Current Transducer LF 205-S

For the electronic measurement of currents : DC, AC, pulsed...,

with a galvanic isolation between the primary circuit (high power)

and the secondary circuit (electronic circuit).

Electrical data

I

PN

Primary nominal r.m.s. current

200

A

I

P

Primary current, measuring range

0 .. ± 420

A

R

M

Measuring resistance @

T

T

R

with ± 12 V

@ ± 200 A

max

0

71

0

69

Ω

@ ± 420 A

max

0

14

0

12

Ω

with ± 15 V

@ ± 200 A

max

0

100

23

98

Ω

@ ± 420 A

max

0

28

23

26

Ω

I

SN

Secondary nominal r.m.s. current

100

mA

K

N

Conversion ratio

1 : 2000

V

C

Supply voltage (± 5 %)

± 12 .. 15

V

I

C

Current consumption @ ± 15 V

17 + I

S

mA

V

d

R.m.s. voltage for AC isolation test, 50 Hz, 1 mn

3.5

kV

Accuracy - Dynamic performance data

X

G

Overall accuracy @ I

± 0.5

%

ε

L

Linearity

< 0.1

%

Typ

Max

I

O

Offset current @ I

± 0.2

mA

I

OM

± 0.1

mA

I

OT

Thermal drift of I

O

- 40°C .. + 85°C

± 0.12

± 0.4

mA

t

ra

Reaction time @ 10 % of I

PN

< 500

ns

t

r

PN

< 1

µs

di/dt

di/dt accurately followed

> 100

A/µs

f

Frequency bandwidth (- 3 dB)

DC .. 100

kHz

General data

T

A

Ambient operating temperature

- 40 .. + 85

°C

T

S

Ambient storage temperature

- 40 .. + 90

°C

R

S

Secondary coil resistance @ T

33

Ω

@ T

35

Ω

m

Mass

78

g

EN 50178

Features

transducer using the Hall effect

according to UL 94-V0.

Advantages

interference

Applications

motor drives

(UPS)

(SMPS)

applications.

I

PN

=

200 A

021125/10

LEM Components

www.lem.com