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

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090608/14

I

Features

Closed loop (compensated)

●

current transducer using the Hall

effect

Printed circuit board mounting

●

Isolated plastic case recognized

●

according to UL 94-V0.

Special features

K

●

N

= 1: 2000

T

●

A

= - 40°C .. + 85°C

Potted.

●

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

Traction.

●

Current Transducer LA 125-P/SP4

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

125

A

I

PM

Primary current, measuring range

0 .. ± 300

A

R

M

Measuring resistance

T

T

R

R

with ± 12 V

@ ± 125 A

max

0

89

0

85

Ω

@ ± 200 A

max

0

29

0

25

Ω

with ± 15 V

@ ± 125 A

max

0

134

0

130

Ω

@ ± 200 A

max

0

54

0

50

Ω

@ ± 300 A

max

0

11

0

7

Ω

I

SN

Secondary nominal current rms

62.5

mA

K

N

Conversion ratio

1 : 2000

V

C

Supply voltage (± 5 %)

± 12 .. 15

V

I

C

Current consumption

X

Accuracy @

I

@ ± 15 V (± 5 %)

± 0.60

%

Accuracy - Dynamic performance data

@ ± 12 .. 15 V (± 5 %)

± 0.80

%

ε

L

Linearity error

< 0.15

%

Typ

Max

I

O

Offset current @

I

± 0.20

mA

I

OM

I

after an overload of 3 x

I

PN

± 0.25

mA

I

OT

Temperature variation of

I

O

- 25°C .. + 85°C

± 0.20 ± 0.50

mA

- 40°C .. - 25°C

± 0.30 ± 0.80

mA

t

ra

Reaction time to 10 % of

I

PN

< 500

ns

t

r

I

< 1

µs

> 200

A/µs

BW

DC .. 100

kHz

T

A

Ambient operating temperature

- 40.. + 85

°C

General data

T

S

Ambient storage temperature

- 45 .. + 100

°C

R

S

Secondary coil resistance

@

T

76

Ω

@

T

80

Ω

m

Mass

55

g

Standards

EN 50155: 1995

2)

With a di/dt of 100 A/µs

3)

The primary conductor is best filling the through-hole and/or the return of

the primary conductor is above the top of the transducer.

16053