Current Transducer LA 55-P
IPN
=
50 A
For the electronic measurement of currents : DC, AC, pulsed...,
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 ± 12 V
with ± 15 V
ISN
KN
VC
IC
Vd
50
0 .. ± 70
TA = 70°C
TA = 85°C
RM min RM max RM min RM max
@ ± 50 A max
@ ± 70 A max
@ ± 50 A max
@ ± 70 A max
10
10
50
50
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
100
50
160
90
60 95
60 1) 60 1)
135 155
135 2) 135 2)
A
A
ε
Accuracy @ IPN , TA = 25°C
@ ± 15 V (± 5 %)
@ ± 12 .. 15 V (± 5 %)
Ω
Ω
Ω
Ω
50
mA
1 : 1000
± 12 .. 15
V
10 (@ ± 15 V) + IS mA
2.5
kV
Linearity
L
± 0.65
± 0.90
< 0.15
Typ
IO
IOM
IOT
tra
tr
di/dt
f
%
%
%
Max
± 0.2
± 0.3
± 0.5
± 0.6
Offset current @ IP = 0, TA = 25°C
Residual current 3) @ IP = 0, after an overload of 3 x I PN
Thermal drift of IO
0°C .. + 70°C
- 25°C .. + 85°C
± 0.1
± 0.1
Reaction time @ 10 % of IP max
Response time @ 90 % of IP max
di/dt accurately followed
Frequency bandwidth (- 1 dB)
< 500
<1
> 200
DC .. 200
•Closed loop (compensated) current
transducer using the Hall effect
Accuracy - Dynamic performance data
X
Features
mA
mA
mA
mA
ns
µs
A/µs
kHz
•Printed circuit board mounting
•Insulated plastic case recognized
according to UL 94-V0.
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.
Applications
•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
General data
TA
TS
RS
Ambient operating temperature
Ambient storage temperature
Secondary coil resistance @
m
Mass
Standards
Notes :
1)
2)
3)
4)
TA = 70°C
TA = 85°C
4)
Measuring range limited to ± 60 A max
Measuring range limited to ± 55 A max
Result of the coercive field of the magnetic circuit
A list of corresponding tests is available
LEM Components
- 25 .. + 85
- 40 .. + 90
80
85
18
EN 50178
°C
°C
Ω
Ω
g
applications.
980706/8
w w w .lem.com
Dimensions LA 55-P
(in mm. 1 mm = 0.0394 inch)
Bottom view
Left view
Secondary terminals
swiss
made
Terminal + : supply voltage + 12 .. 15 V
Terminal - : supply voltage - 12 .. 15 V
Terminal M : measure
Connection
Standard 00
or N° SP..
Year Week
Front view
Mechanical characteristics
•General tolerance
•Primary through-hole
•Fastening & connection of secondary
Recommended PCB hole
Remarks
± 0.2 mm
12.7 x 7 mm
3 pins
0.63 x 0.56mm
0.9 mm
•IS is positive when IP flows in the direction of the arrow.
•Temperature of the primary conductor should not exceed
90°C.
•Dynamic performances (di/dt and response time) are best
with a single bar completely filling the primary hole.
•In order to achieve the best magnetic coupling, the primary
windings have to be wound over the top edge of the device.
•This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements...),
please contact us.
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
This datasheet has been downloaded from:
www.DatasheetCatalog.com
Datasheets for electronic components.