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LT505-T

Current Transducer LT 505-T

LEM Industrial 

Current Transducer LT 505-T

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).

IPN = 500 A

Electrical data

IPN

Primary nominal r.m.s. current

I

Primary current, measuring range

P

RM Measuring resistance @

500

A

0 .. ± 1200

A

TA = 70°C TA = 85°C

RR RR

M min M max M min M max

with ± 15 V

with ± 24 V

@ ± 500 A

max

@ ± 800 Amax

@ ± 500 A

max

@ ± 1200 Amax

0 65 0 60 Ω

0 15 0 12 Ω

0 145 15 140 Ω

0 22 15 18 Ω

ISN

Secondary nominal r.m.s. current

K N Conversion ratio

VC Supply voltage (± 5 %)

IC

Current consumption

Vd

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

Vb

R.m.s. rated voltage 1), safe separation

basic isolation

100

mA

1 : 5000

± 15 .. 24

V

30 (@ ± 24 V) + IS mA

6

kV

1750

V

3500

V

Accuracy - Dynamic performance data

X

Overall accuracy @ I , T = 25°C

εG

L

Linearity

PN A

IO

I

OT

tr

di/dt

f

Offset current @ IP = 0, TA = 25°C

Thermal drift of I

O

Response time 2) @ 90 % of IP max

di/dt accurately followed

Frequency bandwidth (- 1 dB)

- 10°C .. + 85°C

± 0.6

%

< 0.1

%

Typ Max

± 0.4 mA

± 0.3 ± 0.5 mA

<1

> 50

DC .. 150

µs

A/µs

kHz

General data

TA

Ambient operating temperature

T

Ambient storage temperature

S

R S Secondary coil resistance @

m

Mass

Standards 3)

- 10 .. + 85

°C

- 25 .. + 100 °C

TA = 70°C 65

Ω

TA = 85°C 69

Ω

850

g

EN 50178

Features

•Closed loop (compensated) current

transducer using the Hall effect

•Insulated 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.

Notes : 1) Pollution class 2. With a non insulated primary bar which fills the

through-hole

2) With a di/dt of 100 A/µs

3) A list of corresponding tests is available

980716/2

LEM Components

Tope Co., Ltd. Tel: (02) 8228-0658

Fax: (02) 8228-0659

http://www.sensor.com.tw

w w w .lem.com

e-mail: tope@ms1.hinet.net

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