Current Transducer LA 55-P

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

50

A

I

P

Primary current, measuring range

0 .. ± 70

A

R

M

Measuring resistance @

T

T

R

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

Ω

I

SN

Secondary nominal r.m.s. current

50

mA

K

N

Conversion ratio

1 : 1000

V

C

Supply voltage (± 5 %)

± 12 .. 15

V

I

C

Current consumption

V

d

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

2.5

kV

Accuracy - Dynamic performance data

X

Accuracy @ I

@ ± 15 V (± 5 %)

± 0.65

%

@ ± 12 .. 15 V (± 5 %)

± 0.90

%

ε

L

Linearity

< 0.15

%

Typ

Max

I

O

Offset current @ I

± 0.2

mA

I

OM

± 0.3

mA

I

OT

Thermal drift of I

O

0°C .. + 70°C

± 0.1

± 0.5

mA

- 25°C .. + 85°C

± 0.1

± 0.6

mA

t

ra

Reaction time @ 10 % of I

P max

< 500

n s

t

r

Response time @ 90 % of I

P max

< 1

µs

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

80

Ω

T

85

Ω

m

Mass

18

g

EN 50178

max

max

Features

transducer using the Hall effect

according to UL 94-V0.

Advantages

interference

Applications

motor drives

(UPS)

(SMPS)

applications.

I

PN

=

50 A

980706/8

LEM Components

ww w .lem.com