Current Transducers CT 0.1 .. 0.4-P
For the electronic measurement of small currents: AC,DC, mixed,
with a galvanic isolation between the primary circuit and the
secondary circuit.
I
PN
= ± 100..400 mA
V
OUT
= ± 5 V
Electrical data
Primary nominal
current rms
I
PN
(mA)
100
200
400
Primary current,
measuring range
I
PM
(mA)
± 180
± 360
± 720
Type
RoHS since
date code
46129
46054
46234
Features
•
DC & AC earth leakage current
transducer using a flux-gate
principle
•
PCB mounting
•
±
15V power supply
•
±
5V output
@
I
PN
•
Insulated plastic case recognized
according to UL94-V0.
CT 0.1-P
CT 0.2-P
CT 0.4-P
V
C
I
C
R
IS
V
OUT
R
OUT
R
L
C
L
Supply voltage (± 5 %)
Current consumption
Isolation resistance @ 500 VDC
Output voltage (Analog) @ ±
I
PN,
R
L
= 10kΩ
,
T
A
=25°C
Output internal resistance
Load resistance
Capacitive loading
± 15
± 35
> 500
±5
< 51
≥
10
≤
5
V
mA
MΩ
V
Ω
kΩ
nF
Accuracy-Dynamic performance data
X
Advantages
<±1
%of
I
PN
< ± 0.5 %of
I
PN
< ± 0.05 %/K
< ± 50
mV
<±2
mV
< ± 20
mV
<±4
mV/K
<±3
mV/K
<±2
mV/K
≤
20
ms
≤
60
ms
DC .. 7000 Hz
DC .. 11000 Hz
DC .. 18000 Hz
ε
L
TCV
OUT
V
OE
V
OH
TCV
OE
t
r
BW
Accuracy (excluding offset) @
I
PN,
T
A
= 25°C,
R
L
= 10kΩ
Linearity error (0 .. ±
I
PN
)
Temperature coefficient of
V
OUT
(of reading)
Eletrical offset voltage @
I
P
= 0,
T
A
= 25°C
Hysteresis offset voltage
@
I
P
= 0; after an excursion of 1 x
I
PN
@
I
P
= 0; after an excursion of 100 x
I
PN
Temperature coefficient of
V
OE
@ -20..+85°C CT 0.1-P
CT 0.2-P
CT 0.4-P
Response time to 80% of
I
PN
step
90% of
I
PN
step
Frequency bandwidth (- 3 dB)
CT 0.1-P
CT 0.2-P
CT 0.4-P
•
Small size
•
Bandwidth : DC .. up to 18kHz
•
Response time better than 60 ms
•
Cost effective, compact
alternative to classical RCDs
(Residual Current Device)
Applications
•
Earth leakage detection in
transformerless solar inverters
•
1st human contact protection of
PV arrays
•
Failure detection in power sources
•
Symmetrical fault detection
(e.g. after motor inverter)
•
Current leakage detection in
stacked DC sources
•
Single phase or three phase
differential current measurement up
to
±
30A per wire (DC or AC)
General data
T
A
T
S
dCp
dCl
CTI
m
Ambient operating temperature
Ambient storage temperature
Creepage distance
Clearance distance
Comparative tracking index (Group IIIa)
Mass
Standards
- 20 .. + 85 °C
- 25 .. + 85 °C
> 5.5
mm
> 5.5
mm
> 220
25
g
EN 50178: 1997
Application Domain
•
Industrial
copyright protected
Page 1/3
061017/9
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
www.lem.com
Current Transducer CT 0.1 .. 0.4-P
Isolation characteristics
V
b
Rated isolation voltage rms
with IEC 61010-1 standard and following conditions
- Single insulation
- Over voltage category III
- Pollution degree 2
- Heterogeneous field
Rated isolation voltage rms
with EN 50178 standard and following conditions
- Reinforced insulation
- Over voltage category III
- Pollution degree 2
- Heterogeneous field
Rms voltage for AC isolation test, 50 Hz, 1 min
Partial discharge extinction voltage rms @ 10pC
Impulse withstand voltage 1.2/50µs
150
V rms
V
b
250
V rms
V
d
V
e
V
w
2.5
> 1.2
6
kV
kV
kV
If insulated cable is used for the primary circuit, the
voltage category could be improved with the following table :
Cable insulation (primary)
Category
HAR 03
300V CAT III
HAR 05
400V CAT III
HAR 07
500V CAT III
Page 2/3
061017/9
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
www.lem.com
Dimensions CT 0.1 .. 0.4-P
(in mm. 1 mm = 0.0394 inch)
30
20
11.0
M GND
M GND -
Vcc+
Vcc
12.6
17.8
17.8
-V c + c
c Vc
5±2
0. 5
0.5±0.3
Ø 11
f 11
ø
30
5±
2
4- 0.7
± 0.3
4- 0.7
2-F 2
2-Ø2
(NC)
± 0.3
I
Ip flux-gate
DC
+Vcc
transformer
AC
M
GND
−Vcc
20.3
2-Ø5
± 0.3
2-F 5
+Vcc
+Vcc
-
Vcc
-Vcc
GND
GND
M
4.3
10. 5
10.5
11
M
R
L
Vout
Mechanical characteristics
± 1 mm
(Unless otherwise specified in the above drawings.)
•
Aperture for primary conductor Ø11 mm
•
Connection of secondary
4 pins 0.7 x 0.7 mm
2
Recommended PCB hole
1.2 mm
•
PCB fixation
2 pins Ø2 mm
Recommended PCB hole
2.2 mm
Safety
•
General tolerance
This transducer must be used in electric/electronic equipment
with respect to applicable standards and safety requirements
in accordance with the following manufacturer's operating
instructions.
Remarks
Caution, risk of electrical shock
•
V
OUT
is positive when
I
P
flows in the direction of the
arrow.
•
This transducer induces into the primary circuit a
square wave of 500Hz. This voltage can induce an AC
current in the primary if the primary impedance is low.
•
Primary impedance
≥10Ω
CT0.1-P CT0.2-P CT0.4-P
V
OUT
by induced current
≤±0.5% ≤±0.4% ≤±0.2%
of
I
PN
•
Temperature of the primary conductor should not
exceed 100°C.
061017/9
When operating the transducer, certain parts of the module can
carry hazardous voltage (eg. primary busbar, power supply).
Ignoring this warning can lead to injury and/or cause serious
damage.
This transducer is a built-in device, whose conducting parts
must be inaccessible after installation.
A protective housing or additional shield could be used.
Main supply must be able to be disconnected.
Page 3/3
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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