LEM LA25-SP14 Current transducer Datasheet

IPN
Current Transducer LA 25-NP/SP14
=
0.25 A
For the electronic measurement of currents : DC, AC, pulsed,
mixed, with a galvanic isolation between the primary circuit
(high power) and the secondary circuit (electronic circuit).
16094
Electrical data
IPN
IP
RM
Primary nominal r.m.s. current
Primary current, measuring range
Measuring resistance
with ± 15 V
ISN
KN
VC
IC
Vd
Vb
@ ± 0.25 A max
@ ± 0.36 A max
Secondary nominal r.m.s. current
Conversion ratio
Supply voltage (± 5 %)
Current consumption
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
R.m.s. rated voltage 1), safe separation
basic isolation
0.25
0 .. ± 0.36
R M min
R M max
A
A
Features
100
100
Ω
Ω
turns current transducer using the
Hall effect
• Printed circuit board mounting
• Insulated plastic case recognized
according to UL 94-V0.
320
190
25
100 : 1000
± 15
10 + IS
2.5
600
1700
mA
V
mA
kV
V
V
Accuracy - Dynamic performance data
X
Typical accuracy @ IPN , TA = 25°C
Linearity error
± 0.5
< 0.2
IO
IOM
IOT
Offset current 2) @ IP = 0, TA = 25°C
Residual current 3) @ IP = 0, after an overload of 3 x IPN
Thermal drift of IO
- 10°C .. + 70°C
Typ
± 0.05
± 0.05
± 0.10
tr
f
Response time 4) @ 90 % of IPN
Frequency bandwidth (- 1 dB)
<1
DC .. 150
ε
L
%
%
Max
± 0.15
± 0.15
± 0.35
mA
mA
mA
µs
kHz
• Closed loop (compensated) multi-
Special features
•
•
•
•
IPN
IP
KN
TA
=
=
=
=
0.25 A
0 .. ± 0.36 A
100 : 1000
- 10°C .. + 70°C.
Advantages
•
•
•
•
•
•
•
Excellent accuracy
Very good linearity
Low temperature drift
Optimized response time
Wide frequency bandwidth
No insertion losses
High immunity to external
interference
• Current overload capability.
General data
Applications
TA
TS
RP
RS
LP
R IS
m
Ambient operating temperature
Ambient storage temperature
Primary coil resistance @ TA = 25°C
Secondary coil resistance @ TA = 70°C
Primary insertion inductance
Isolation resistance @ 500 V, TA = 25°C
Mass
Standards
- 10 .. + 70
°C
- 25 .. + 85
°C
< 860
mΩ
110
Ω
496
µH
> 1500
MΩ
22
g
EN 50178 : 1997
• AC variable speed drives and servo
motor drives
• Static converters for DC motor drives
• Battery supplied applications
• Uninterruptible Power Supplies
(UPS)
• Switched Mode Power Supplies
(SMPS)
Notes :
1)
2)
3)
4)
Pollution class 2
Measurement carried out after 15 mn functioning
The result of the coercive field of the magnetic circuit
With a di/dt of 100 A/µs.
• Power supplies for welding
applications.
060405/4
LEM
w w w .lem.com
Dimensions LA 25-NP/SP14
Bottom view
(in mm. 1 mm = 0.0394 inch)
Right view
Top view
swiss
made
Standard 00
or N° SP..
Year
Week
Secondary terminals
Terminal + : supply voltage + 15 V
Terminal M : measure
Terminal - : supply voltage - 15 V
Connection
in
out
Back view
Mechanical characteristics
Remark
• General tolerance
• Fastening & connection of primary
• IS is positive when IP flows from terminal + to terminal -.
± 0.2 mm
2 pins
0.635 x 0.635 mm
• Fastening & connection of secondary 3 pins ∅ 1 mm
• Recommended PCB hole
1.2 mm
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
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