LA55-P_07 Datasheet, PDF (1/2 Pages) LEM – Current Transducer

Current Transducer LA 55-P
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).
I_PN = 50 A
Electrical data
16019
I
Primary nominal current rms
PN
I_PM
Primary current, measuring range
R_M Measuring resistance @
50
A
0 .. ± 70
A
T_A = 70°C T_A = 85°C
RR RR
M mini M maxi M mini M maxi
with ± 12 V
with ± 15 V
@ ± 50 A
maxi
@ ± 70 A _maxi
@ ± 50 A _maxi
@ ± 70 A
maxi
10 100 60 95 Ω
10 50 60¹⁾ 60¹⁾ Ω
50 160 135 155 Ω
50 90 135²⁾ 135²⁾ Ω
I_SN
Secondary nominal current rms
K _N Conversion ratio
V
Supply voltage (± 5 %)
C
I_C
Current consumption
V_d
Rms voltage for AC isolation test, 50 Hz, 1 min
50
mA
1 : 1000
± 12 .. 15
V
10 (@ ±15 V) + I_S m A
2.5
kV
Accuracy - Dynamic performance data
X
Accuracy @ I , T = 25°C
PN A
@ ± 15 V (± 5 %)
@ ± 12 .. 15 V (± 5 %)
ε
Linearity error
L
I
O
I_OM
I
OT
t
ra
t_r
di/dt
BW
Offset current @ I = 0, T = 25°C
P
A
Magnetic offset current ³⁾ @ I_P = 0 and specified R_M
after an overload of 3 x I
PN
Temperature variation of I
O
0°C .. + 70°C
- 25°C .. + 85°C
Reaction time @ 10 % of I
PN
Response time @ 90 % of I_PN Step
di/dt accurately followed
Frequency bandwidth (- 1 dB)
± 0.65
%
± 0.90
%
< 0.15
%
Typ Maxi
± 0.2 mA
± 0.3 mA
± 0.1 ± 0.5 mA
± 0.1 ± 0.6 mA
< 500
<1
> 200
DC .. 200
ns
µs
A/µ s
kHz
General data
T_A
Ambient operating temperature
T_S
Ambient storage temperature
R
Secondary coil resistance @
S
m
Mass
Standards
T = 70°C
A
T_A = 85°C
- 25 .. + 85
°C
- 40 .. + 90
°C
80
Ω
85
Ω
18
g
EN 50178: 1997
Features
• Closed loop (compensated) current
transducer using the Hall effect
• 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
applications.
Application Domain
• Industrial.
Notes: ¹⁾ Measuring range limited to ± 60 A _maxi
2) _{Measuring range limited to ± 55 A maxi}
3) _{Result of the coercive field of the magnetic circuit.}
070103/11
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
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