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)
± 200
± 400
± 800
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
•
Isolated 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
± 45
> 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
< ± 100
mV
<±2
mV
< ± 20
mV
<±8
mV/K
<±4
mV/K
<±2
mV/K
≤
20
ms
≤
60
ms
DC 40..7000Hz
DC 40..11000Hz
DC 40..18000Hz
TCV
OUT
V
OE
V
OH
ε
L
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)
Electrical 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 and 40 up to 7..18 kHz
•
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
Notes : Performance data are given for steady phase of the transducer.
Transitory period after power on lasts typically less than 2 min.
Please refer to characterization report for details.
Please don't put the high voltage between the secondary pins and fixing
pins. If it must be so, don't exceed the 2.5 kV between these pins with the
maximum isolation distance.
080909/14
Application domain
•
Industrial
copyright protected
Page 1/3
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
Safety
This transducer must be used in electric/electronic equipment with respect to
applicable standards and safety requirements in accordance with the manufacturer's
operating instructions.
Caution! Risk of electrical shock
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 2/3
080909/14
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
30
0.50 +/-0.3
12.6
17.80
5+/-2
11
4-
0.7+/-0.3
2-
2+/-0.3(NC)
I
Ip flux-gate
DC
+ Vcc
transformer
AC
M
GND
- Vcc
+ Vc c
-Vc c
GND
M
10.5
20.3
4.3
Vo u t
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
Remarks
•
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
CT 0.1-P CT 0.2-P CT 0.4-P
V
OUT
by induced current
≤±0.8% ≤±0.5% ≤±0.3%
of
I
PN
•
Temperature of the primary conductor should not exceed
100°C.
•
General tolerance
Page 3/3
080909/14
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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