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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).

I

PN

= 8-12-25 A

Electrical data

I

PN

I

P

R

M

Primary nominal r.m.s. current

Primary current, measuring range

Measuring resistance @

with 鹵 12 V

with 鹵 15 V

@

1)

25

At

0 .. 55

At

T

A

= 70擄C

T

A

= 85擄C

R

M min

R

M max

R

M min

R

M max

0

67

257

155

371

236

0

70

252

150

366

231

鈩?/div>

Features

鈥?/div>

Closed loop (compensated) multi-

range current transducer using the

Hall effect

鈥?/div>

Printed circuit board mounting

鈥?/div>

Insulated plastic case recognized

according to UL 94-V0.

I

PN

[鹵 At

DC

]

I

PN

[At

RMS

]

2)

I

PN

[鹵 At

DC

]

I

PN

[At

RMS

]

2)

I

P

<

I

PN 3)

I

SN

K

N

V

C

I

C

V

d

V

b

Secondary nominal r.m.s. current

Conversion ratio

Supply voltage (鹵 5 %)

Current consumption

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

R.m.s. rated voltage

4)

25

mA

1 - 2 - 3 : 1000

鹵 12 .. 15

V

10

(@ 鹵 15V) +

I

S

mA

5

kV

600

V

Advantages

鈥?/div>

Excellent accuracy

Very good linearity

Low temperature drift

Optimized response time

Wide frequency bandwidth

No insertion losses

High immunity to external

interference

鈥?/div>

Current overload capability.

Accuracy - Dynamic performance data

X

蔚

L

Accuracy

5)

@

I

PN,

T

A

= 25擄C

Linearity

Offset current @

T

A

= 25擄C

Residual current @

I

P

= 0, after an overload of 5 x

I

PN

Thermal drift of

I

O

0擄C .. + 70擄C

- 25擄C .. + 85擄C

Reaction time @ 10 % of

I

PN

Response time

6)

@ 90 % of

I

PN

di/dt accurately followed

Frequency bandwidth (- 1 dB)

鹵 0.3

< 0.2

Max

鹵 0.15

鹵 0.20 鹵 0.25

鹵 0.10 鹵 0.60

鹵 0.10 鹵 0.70

< 200

< 500

> 200

DC .. 200

Typ

%

mA

ns

A/碌s

kHz

I

O

I

OM

I

OT

t

r a

t

r

di/dt

f

Applications

鈥?/div>

AC variable speed drives and servo

鈥?/div>

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.

General data

T

A

T

S

R

S

m

Ambient operating temperature

Ambient storage temperature

Secondary coil resistance

Mass

Standards

- 25 .. + 85

- 40 .. + 90

99

104

20

EN 50178

擄C

鈩?/div>

g

@

T

A

= 70擄C

@

T

A

= 85擄C

7)

Notes :

1)During

10 s, with

R

M

鈮?/div>

109

鈩?/div>

(V

C

= 鹵 15 V) -

2)

50 Hz Sinusoidal

-

3)

The measuring resistance

R

M min

may be lower (see "LAH Technical Informa-

tion" leaflet) -

4)

Pollution class 2, cat. III -

5)

Without

I

O

&

I

OM

-

6)

With a di/dt of

100 A/碌s -

7)

A list of corresponding tests is available.

010822/3

LEM Components

w w w .lem.com

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版本

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