LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.

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Current Transducer LA 205-S

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

with galvanic isolation between the primary circuit (high power)

and the secondary circuit (electronic circuit).

Electrical data

I

PN

Primary nominal current rms

200

A

I

PM

Primary current, measuring range

0 .. ± 300

A

î

P max

600

A

T

T

R

M

Measuring resistance

R

with ± 12 V

@ ± 200 A

max

0

68

0

66 Ω

@ ± 300 A

max

0

33

0

30 Ω

with ± 15 V

@ ± 200 A

max

5

95

5

93 Ω

@ ± 300 A

max

5

50

5

49 Ω

I

SN

Secondary nominal current rms

100

mA

K

N

Conversion ratio

1 : 2000

V

C

Supply voltage (± 5 %)

± 12 .. 15

V

I

C

Current consumption

I

X

G

Overall accuracy @

I

± 0.8

%

Accuracy - Dynamic performance data

ε

L

Linearity error

< 0.1

%

Typ

Max

I

O

Offset current @

I

± 0.15

mA

I

OM

I

mA

after an overload of 3 x

I

PN

± 0.50

mA

I

OT

Temperature variation of

I

O

- 10°C .. + 85°C

± 0.15 ± 0.30

mA

t

ra

Reaction time @ 10 % of

I

PN

< 500

ns

t

r

I

< 1

µs

di/dt

di/dt accurately followed

> 100

A/µs

BW

Frequency bandwidth (- 3 dB)

DC .. 100

kHz

T

A

Ambient operating temperature

- 10 .. + 85

°C

General data

T

S

Ambient storage temperature

- 40 .. + 90

°C

R

S

Secondary coil resistance

@

T

35

Ω

@

T

37

Ω

m

Mass

110

g

Standards

EN 50178: 1997

V

2)

The result of the coercive force (Hc) of the magnetic circuit

3)

With a di/dt of 100 A/µs.

I

Features

● Closed loop (compensated)

current transducer using the Hall

effect

● Isolated plastic case recognized

according to UL 94-V0

● Patent pending.

Advantages

● Excellent accuracy

● Very good linearity

● Low temperature drift

● Optimized response time

● Wide frequency bandwidth

● No insertion losses

● High immunity to external

interference

● Current overload capability.

Applications

● AC variable speed drives and

servo motor drives

● Static converters for DC motor

drives

● Battery supplied applications

● Uninterruptible Power Supplies

(UPS)

● Switched Mode Power Supplies

(SMPS)

● Power supplies for welding

applications.

Application domain

● Industrial.

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