IPN
Current Transducer LA 55-P
=
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).
16019
Electrical data
IPN
IPM
RM
Primary nominal current rms
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
100
50
160
90
Secondary nominal current rms
Conversion ratio
Supply voltage (± 5 %)
Current consumption
Rms voltage for AC isolation test, 50 Hz, 1 min
A
A
ε
Accuracy @ IPN , TA = 25°C
@ ± 15 V (± 5 %)
@ ± 12 .. 15 V (± 5 %)
Linearity error
L
Ω
Ω
Ω
Ω
60 95
60 1) 601)
135 155
135 2) 135 2)
50
mA
1 : 1000
± 12 .. 15
V
10 (@ ± 15 V) + IS m A
2.5
kV
± 0.65
± 0.90
< 0.15
Typ
IO
IOM
IOT
tra
tr
di/dt
BW
%
%
%
Max
± 0.2
mA
± 0.3
± 0.5
± 0.6
mA
mA
mA
Offset current @ IP = 0, TA = 25°C
Magnetic offset current 3) @ IP = 0 and specified RM
after an overload of 3 x I PN
Temperature variation of IO
0°C .. + 70°C
- 25°C .. + 85°C
± 0.1
± 0.1
Reaction time @ 10 % of IPN
Response time to 90 % of IPN step
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
ns
µs
A/µs
kHz
• Printed circuit board mounting
• Isolated 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
applications.
TA
TS
RS
Ambient operating temperature
Ambient storage temperature
Secondary coil resistance @
m
Mass
Standards
Notes:
1)
2)
3)
TA = 70°C
TA = 85°C
- 25 .. + 85
- 40 .. + 90
80
85
18
EN 50178: 1997
°C
°C
Ω
Ω
g
Application Domain
• Industrial.
Measuring range limited to ± 60 A max
Measuring range limited to ± 55 A max
Result of the coercive field of the magnetic circuit.
page 1/2
080114/13
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
w w w .lem.com
Dimensions LA 55-P
(in mm. 1 mm = 0.0394 inch)
Front view
Bottom view
Left view
Connection
Mechanical characteristics
• General tolerance
• Primary through-hole
• Fastening & connection of secondary
Recommended PCB hole
Safety
± 0.2 mm
12.7 x 7 mm
3 pins
0.63 x 0.56mm
0.9 mm
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.
Remarks
• 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.
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 2/2
080114/13
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
w w w .lem.com