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

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060213/5

Current Transducer LAH 25-NP

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

25

At

I

P

0 .. 55

At

R

M

Measuring resistance @

T

T

R

R

with ± 12 V

@ I

0

257

0

252

Ω

@ I

2)

0

155

0

150

Ω

with ± 15 V

@ I

67

371

70

366

Ω

@ I

2)

67

236

70

231

Ω

@ I

P

< I

PN

3)

I

SN

Secondary nominal r.m.s. current

25

mA

K

N

Conversion ratio

1 - 2 - 3 : 1000

V

C

Supply voltage (± 5 %)

± 12 .. 15

V

I

C

Current consumption

V

d

R.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn

5

kV

V

b

600

V

Accuracy - Dynamic performance data

X

± 0.3

%

ε

L

Linearity error

< 0.2

%

Typ

Max

I

O

Offset current @ T

± 0.15

mA

I

OM

Residual current @ I

± 0.20 ± 0.25

mA

I

OT

Thermal drift of I

O

0°C .. + 70°C

± 0.10 ± 0.60

mA

- 25°C .. + 85°C

± 0.10 ± 0.70

mA

t

r a

Reaction time @ 10 % of I

PN

< 200

ns

t

r

PN

< 500

ns

di/dt

di/dt accurately followed

> 200

A/µs

f

Frequency bandwidth (- 1 dB)

DC .. 200

kHz

General data

T

A

Ambient operating temperature

- 25 .. + 85

°C

T

S

Ambient storage temperature

- 40 .. + 90

°C

R

S

Secondary coil resistance

@ T

99

Ω

@ T

104

Ω

m

Mass

20

g

Standards

EN 50178 : 1997

Notes : 1)During 10 s, with

R

3) The measuring resistance R

tion" leaflet) - 4) Pollution class 2, cat. III - 5) Without I

100 A/µs - 7)

Features

range current transducer using the

Hall effect

according to UL 94-V0.

Advantages

interference

Applications

motor drives

(UPS)

(SMPS)

applications.

I

16038