Electrical data

Primary Nominal

Primary AC Current

Output current

Type

DC & AC Current

I

I

I

100

600

4-20

DHR 100 C420

200

600

4-20

DHR 200 C420

300

1000

4-20

DHR 300 C420

400

1000

4-20

DHR 400 C420

500

1800

4-20

DHR 500 C420

600

1800

4-20

DHR 600 C420

1000

1800

4-20

DHR 1000 C420

R

L

Load resistance

< 300

Ω

V

C

Supply voltage

+ 20 .. 50 V DC

I

C

Current consumption

30 mA + I

OUT

I

SL

Output current limitation

< 25

mA

Î

P

Overload capability (Ampere Turns)

30000

A.t

Performance data

X

Accuracy @ I

< ± 1

% of I

PN

ε

L

Linearity error (1% of I

< ± 1.0 % of I

PN

I

OE

Electrical offset current, T

4

mA

TCI

OE

Temperature coefficient of I

OE

( 0..+60 °C)

± 3.2

µA/K

(-40..+70 °C)

± 6.4

µA/K

TCI

OUT

Temperature coefficient of I

± 0.1

%/K

t

r

Response time to 90% of I

< 150

m s

BW

Frequency bandwidth (±1dB)

DC 20..6000Hz

General data

T

A

Ambient operating temperature

- 40 .. + 70

°C

T

S

Ambient storage temperature

- 40 .. + 85

°C

m

Mass

260

g

IPxx

Protection degree

IP20

Note :

taken into account for accurate True RMS calculation. Yet the device is designed for

maximum continuous True RMS value equal to I

the above specified output limitation.

AC/DC Current transducer DHR-C420

The transducer for the electronic measurement of DC & distorted AC

waveform currents, with galvanic isolation between the primary circuit

(power) and the secondary circuit (measurement). True RMS 4-20mA

current output.

I

Features

• VFD and SCR waveforms current

measurement

• True RMS output

• 4-20mA current output

• Panel mounting

• Eliminates insertion loss

• Insulated plastic case recognized

according to UL94-V0

Advantages

• Large aperture for cable up to

Ø32mm

• High isolation between primary and

secondary circuits

• Easy installation

Applications

• VFD Controlled Loads

VFD output indicates how the motor

and attached load are operating.

• SCR Controlled Loads

Acurate measurement of phase

angle fired or burst fired (time

proportioned)

SCRs. Current measurement gives

faster response than temperature

measurement.

• Switching Power Supplies and

Electronic Ballasts

True RMS sensing is the most

accurate way to measure power

supply or ballast input power.

Application domain

• Energy and Automation

061128/14

www.lem.com

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

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