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 4-20 mA
current output.
Electrical data
I PN = 100 .. 1000 A
Primary Nominal
Primary AC Current
Output current
Type
DC & AC Current
I PN (A.t.RMS)
100
200
300
400
500 2)
600 2)
1000 2)
Max. Peak Value 1)
I P (A)
600
600
1000
1000
1800
1800
1800
I OUT (mA DC)
4-20
4-20
4-20
4-20
4-20
4-20
4-20
DHR 100 C420
DHR 200 C420
DHR 300 C420
DHR 400 C420
DHR 500 C420
DHR 600 C420
DHR 1000 C420
Features
● VFD and SCR waveforms current
measurement
● True RMS output
● 4-20 mA current output
● Panel mounting
● Eliminates insertion loss
● Isolated plastic case recognized
e
R L Load resistance
V C Supply voltage
I C Current consumption
I SL Output current limitation
? P Overload capability (Ampere Turns)
Performance data
X Accuracy @ I PN , T A = 25°C (excluding offset)
L Linearity error (1% of I PN .. ± I PN )
I OE Electrical offset current, T A = 25°C
TCI OE Temperature coefficient of I OE ( 0..+60 °C)
(-40..+70 °C)
TCI OUT Temperature coefficient of I OUT (% of reading)
t r Response time to 90 % of I PN step
BW Frequency bandwidth (± 1 dB)
General data
< 300
+ 20 .. 50
30 mA + I OUT
< 25
30000
< ± 1
< ± 1.0
4
± 3.2
± 6.4
± 0.1
< 150
DC 20..6000
W
V DC
mA
A.t
% of I PN
% of I PN
mA
m A/K
m A/K
%/K
ms
Hz
according to UL94-V0
Advantages
● Large aperture for cable up to
?32mm
● 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
T A
T S
m
IPxx
Surrounding operating temperature
Surrounding storage temperature
Mass
Protection degree
- 40 .. + 70
- 40 .. + 85
260
IP20
°C
°C
g
measurement gives faster
response than temperature
measurement.
● Switching Power Supplies and
Electronic Ballasts
True RMS sensing is the most
accurate way to measure power
Notes : 1) The Max. Peak AC Current is the highest peak level of the primary
supply or ballast input power.
2)
signal that is taken into account for accurate True RMS calculation. Yet
the device is designed for maximum continuous True RMS value equal to
I PN , whereas the output is limited by the above specified output limitation.
According to the UL 508 Standard for Safety for Industrial Control
Equipment the primary current must not exceed 475 A.t.RMS through the
transducer hole.
Application domain
● Energy and Automation
Page 1/4
100518/20
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
www.lem.com
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