LEM LA25-SP14 Current transducer la 25-np/sp14 Datasheet

Current Transducer LA 25-NP/SP14
IPN
=
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).
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
•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
ε
Typical accuracy @ IPN , TA = 25°C
Linearity
L
± 0.5
< 0.2
%
%
Typ
Max
Offset current 2) @ IP = 0, TA = 25°C
± 0.05 ± 0.15
Residual current 3) @ IP = 0, after an overload of 3 x IPN ± 0.05 ± 0.15
Thermal drift of IO
- 10°C .. + 70°C
± 0.10 ± 0.35
mA
mA
mA
tr
f
Response time 4) @ 90 % of IP max
Frequency bandwidth (- 1 dB)
µs
kHz
<1
DC .. 150
General data
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 5)
Special features
•IPN
•IP
•K N
•TA
=
=
=
=
0.25 A
0 .. ± 0.36 A
100 : 1000
- 10°C .. + 70°C.
Advantages
IO
IOM
IOT
TA
TS
RP
RS
LP
R IS
m
•Closed loop (compensated) multi-
•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.
Applications
- 10 .. + 70
- 25 .. + 85
< 745
110
496
> 1500
22
EN 50178
°C
°C
mΩ
Ω
µH
MΩ
g
•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)
•Power supplies for welding
Notes :
1)
2)
3)
4)
5)
Pollution class 2
Measurement carried out after 15 mn functionning
The result of the coercive field of the magnetic circuit
With a di/dt of 100 A/µs
A list of corresponding tests is available
LEM Components
applications.
990126/2
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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