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

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090519/14

I

Features

Closed loop (compensated)

●

current transducer using the Hall

effect

Printed circuit board mounting

●

Isolated plastic case recognized

●

according to UL 94-V0.

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.

●

Current Transducer LA 55-P

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

50

A

I

PM

Primary current, measuring range

0 .. ± 70

A

R

M

Measuring resistance

T

T

R

with ± 12 V

@ ± 50 A

max

10

100 60

95

Ω

@ ± 70 A

max

10

50

Ω

with ± 15 V

@ ± 50 A

max

50

160 135 155

Ω

@ ± 70 A

max

50

90

I

SN

Secondary nominal current rms

50

mA

K

N

Conversion ratio

1 : 1000

V

C

Supply voltage (± 5 %)

± 12 .. 15

V

I

C

Current consumption

X

Accuracy @

I

@ ± 15 V (± 5 %)

± 0.65

%

Accuracy - Dynamic performance data

@ ± 12 .. 15 V (± 5 %)

± 0.90

%

ε

L

Linearity error

< 0.15

%

Typ

Max

I

O

Offset current @

I

± 0.2

mA

I

OM

I

after an overload of 3 x

I

PN

± 0.3

mA

I

OT

Temperature variation of

I

O

- 25°C .. + 85°C

± 0.1 ± 0.6

mA

- 40°C .. - 25°C

± 0.2 ± 1.0

mA

t

ra

Reaction time to 10 % of

I

< 500

ns

t

r

Response time to 90 % of

I

< 1

µs

di/dt di/dt accurately followed

> 200

A/µs

BW

Frequency bandwidth (- 1 dB)

DC .. 200

kHz

T

A

Ambient operating temperature

- 40 .. + 85

°C

General data

T

S

Ambient storage temperature

- 40 .. + 90

°C

R

S

Secondary coil resistance

@

T

80

Ω

@

T

85

Ω

m

Mass

18

g

Standards

EN 50178: 1997

max

2)

Measuring range limited to ± 55 A

max

3)

Result of the coercive field of the magnetic circuit.

16019