AC/DC Current transducer DHR-C420 IPN = 100..1000 A
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.
Features
Electrical data
· VFD and SCR waveforms current
measurement
PrimaryNominal
DC & AC Current
IPN (A.t.RMS)
Primary AC Current
Max. Peak Value (*)
IP (A)
Output current
IOUT (mADC)
Type
· True RMS output
· 4-20mA current output
· Panel mounting
100
200
300
400
500
600
1000
600
600
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
· Eliminates insertion loss
· Insulated plastic case recognized
according to UL94-V0
1000
1000
1800
1800
1800
Advantages
RL
VC
IC
ISL
ÎP
Load resistance
Supply voltage
Current consumption
Output current limitation
Overload capability (Ampere Turns)
< 300
+ 20 .. 50 V DC
30 mA + IOUT
< 25
W
· Large aperture for cable up to
Ø32mm
mA
A.t
· High isolation between primary and
secondary circuits
30000
· Easy installation
Performance data
X
Accuracy @ IPN, TA = 25°C (excluding offset)
Linearity error (1% of IPN .. ± IPN)
Electrical offset current, TA = 25°C
Temperature coefficient of IOE ( 0..+60 °C)
(-40..+70 °C)
Temperature coefficient of IOUT (% of reading)
Response time to 90% of IPN step
Frequency bandwidth (±1dB)
< ± 1 % of IPN
< ± 1.0 % of IPN
Applications
e
L
IOE
4
mA
mA/K
mA/K
%/K
m s
· VFD Controlled Loads
TCIOE
± 3.2
± 6.4
± 0.1
< 150
VFD output indicates how the motor
and attached load are operating.
· SCR Controlled Loads
TCIOUT
tr
BW
Acurate measurement of phase
angle fired or burst fired (time
proportioned)
DC 20..6000Hz
General data
SCRs. Current measurement gives
faster response than temperature
measurement.
TA
TS
m
Ambient operating temperature
Ambient storage temperature
Mass
- 40 .. + 70 °C
- 40 .. + 85 °C
260
g
· Switching Power Supplies and
Electronic Ballasts
IPxx
Protection degree
IP20
True RMS sensing is the most
accurate way to measure power
supply or ballast input power.
Note : (*) The Max. Peak AC Current is the highest peak level of the primary signal that is
taken into account for accurate True RMS calculation. Yet the device is designed for
maximum continuous True RMS value equal to IPN, whereas the output is limited by
the above specified output limitation.
Application domain
· Energy and Automation
Page 1/3
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
061128/14
www.lem.com
LEM [ LEM ]
