Current transducer LF 1010-S
I
PN
= 1000 A
For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation
between the primary and the secondary circuit.
Features
● Bipolar and insulated current measurement up to 2.7 kA
● Current output
● Closed loop (compensated) current transducer
● Panel mounting.
Standards
●
EN 50178: 1997
● UL 508: 2010.
Application Domain
● Industrial.
Advantages
●
High accuracy
● Very low offset drift over temperature.
Applications
● Windmill inverters
●
Test and measurement
● AC variable speed and servo motor drives
● Statics converters for DC motors drives
● Battery supplied applications
● Uninterruptible Power Supplies (UPS)
● Switched Mode Power Supplies (SMPS)
● Power supplies for welding applications.
N°97.J9.60.000.0
24August2015/Version 7
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LF 1010-S
Absolute maximum ratings
Parameter
Maximum supply voltage (working) (−40 … 85 °C)
Primary conductor temperature
Maximum steady state primary current (−40 … 85 °C)
Symbol
±U
C
T
B
I
PN
Unit
V
°C
A
Value
±25.2
100
1000
Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum ratings for extended periods may degrade reliability.
UL 508: Ratings and assumptions of certification
File # E189713 Volume: 2 Section: 9
Standards
● USR indicates investigation to the Standard for Industrial Control Equipment UL 508.
● CNR indicates investigation to the Canadian standard for Industrial Control Equipment CSA C22.2 No. 14-13
Conditions of acceptability
When installed in the end-use equipment, with primary feedthrough potential involved of 600 V AC/DC, consideration shall be
given to the following:
1 - These products must be mounted in a suitable end-use enclosure.
Marking
Only those products bearing the UL or UR Mark should be considered to be Listed or Recognized and covered under UL’s Follow-
Up Service. Always look for the Mark on the product.
2 - he secondary pin terminals have not been evaluated for field wiring.
T
3 - ow voltage control circuit shall be supplied by an isolating source (such as transformer, optical isolator, limiting
L
impedance or electro-mechanical relay).
B
4 - ased on the temperature test performed on all Series, the primary bar or conductor shall not exceed 100 °C in the
end use application.
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LF 1010-S
Insulation coordination
Parameter
Rms voltage for AC insulation test, 50 Hz, 1 min
Impulse withstand voltage 1.2/50 µs
Insulation resistance
Comparative tracking index
Application example
Symbol
U
d
Û
W
R
IS
CTI
Unit
kV
kV
MΩ
Value
3.8
16
200
600
1000 V
CAT III, PD2
1000 V
CAT III, PD2
Comment
measured at 500 V DC
Reinforced insulation, non
uniform field according to
EN 50178, IEC 61010
Basic insulation, non
uniform field according to
EN 50178, IEC 61010
Application example
Case material
Clearance and creepage
-
-
V0 according
to UL 94
See dimensions drawing on page 7
Environmental and mechanical characteristics
Parameter
Ambient operating temperature
Ambient storage temperature
Mass
Symbol
T
A
T
S
m
Unit
°C
°C
g
Min
−40
−50
Typ
Max
85
90
Comment
503
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LF 1010-S
Electrical data
At
T
A
= 25 °C, ±U
C
= ±24 V,
R
M
= 1 Ω, unless otherwise noted.
Lines with a * in the conditions column apply over the −40 … 85 °C ambient temperature range.
Parameter
Primary nominal rms current
Primary current, measuring range
Measuring resistance
Secondary nominal rms current
Resistance of secondary winding
Secondary current
Number of secondary turns
Theoretical sensitivity
Supply voltage
Current consumption
Offset current, referred to primary
Temperature variation of
I
O
,
referred to primary
Magnetic offset current,
referred to primary
Sensitivity error
Linearity error
Overall accuracy at
I
PN
Output rms current noise referred
to primary
Reaction time @ 10 % of
I
PN
Step response time to 90 % of
I
PN
Frequency bandwidth
Symbol
I
PN
I
PM
R
M
I
SN
R
S
I
S
N
S
G
th
±U
C
I
C
I
O
I
OT
I
OM
ε
G
ε
L
X
G
I
no
t
ra
t
r
BW
Unit
A
A
Ω
A
Ω
A
Min
−2700
0
−0.2
Typ
Max
1000
2700
*
*
*
0.2
29.9
*
Conditions
Max value of
R
M
is given in figure 1
R
S
(T
A
) =
R
S
× (1 + 0.004 × (T
A
+ ∆temp−25))
Estimated temperature increase @I
PN
is
∆temp = 15 °C
−0.54
5000
0.54
*
mA/A
V
mA
A
A
A
%
−0.15
−1
−0.6
±14.25
0.2
±25.2
44 +
I
S
49 +
I
S
1
0.6
±1
0.15
0.15
0.2
0.4
50
< 0.5
< 0.5
200
*
*
*
25 … 70 … 85 °C
−40 … 85 °C
1 Hz to 20 kHz (see figure 4)
0 to 1 kA, 200 A/µs
0 to 1 kA, 200 A/µs
−3 dB, small signal bandwidth
(see figure 5)
*
After 3 ×
I
PN
*
±U
C
= ±15 V
±U
C
= ±24 V
%
of
I
PN
−0.15
%
of
I
PN
mA
µs
µs
kHz
−0.2
−0.4
Definition of typical, minimum and maximum values
Minimum and maximum values for specified limiting and safety conditions have to be understood as such as well as values shown
in “typical” graphs.
On the other hand, measured values are part of a statistical distribution that can be specified by an interval with upper and lower
limits and a probability for measured values to lie within this interval.
Unless otherwise stated (e.g. “100 % tested”), the LEM definition for such intervals designated with “min” and “max” is that the
probability for values of samples to lie in this interval is 99.73 %.
For a normal (Gaussian) distribution, this corresponds to an interval between −3 sigma and +3 sigma. If “typical” values are not
obviously mean or average values, those values are defined to delimit intervals with a probability of 68.27 %, corresponding to an
interval between −sigma and +sigma for a normal distribution.
Typical, minimum and maximum values are determined during the initial characterization of the product.
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LF 1010-S
Typical performance characteristics
120
100
R
M max
(Ω)
80
60
40
20
0
700 1000 1300 1600 1900 2200 2500 2800
I
P
(A)
Figure 1: Maximum measuring resistance
R
M max
=
N
S
×
U
C min
− 0.5 V
I
P
−
R
S max
− 0.93
Ω
0
15
30
Time (µs)
45
22.8 V & 85 °C
14.25 V & 85 °C
Input 200 A/div
Output 40 mA/div
Figure 2: Typical step response (0 to 1 kA, 200 A/µs)
−70
I
no referred to primary (A
rms
)
1
2
3
4
5
6
−60
10
0
e
no (dBVrms/Hz
1/2
)
−80
−90
−100
−110
−120
−130
0
10
10
−1
10
−2
10
−3
10
10
f
c
(Hz)
10
10
10
10
10
−4
10
0
10
rms
1
10
2
f
c
(Hz)
10
3
10
4
10
5
10
6
Figure
3: Typical noise voltage density e
no
with
R
M
= 100 Ω
Figure 4: Typical total output current noise with
R
M
= 100 Ω (primary referred, rms)
To calculate the noise in a frequency band
f
1
to
f
2
, the formula
is:
I
no
(f
1
…
f
2
) =
I
no
(f
2
)
2
−
I
no
(f
2
)
2
with
I
no
(f) read from figure 4 (typical, rms value).
Example:
What is the noise from 1 to 10
6
Hz?
Figure 4 gives
I
no
(1 Hz) = 0.5 mA and
I
no
(10
6
Hz) = 199 mA.
The output current noise (rms) is therefore:
(199 × 10
−3
)
2
− (0.5 × 10
−3
)
2
= 199 mA referred to primary
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