Datasheet

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www.lem.com
071108/9
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
Current Transducer LAH 50-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).
Electrical data
I
PN
Primary nominal current rms 50 A
I
PM
Primary current, measuring range
1)
0 .. 110 A
R
M
Measuring resistance @ T
A
= 70°C T
A
= 85°C
R
M min
R
M max
R
M min
R
M max
with ± 12 V @ I
PN
[± A
DC
] 0 221 0 214 Ω
@ I
PN
[A
RMS
]
2)
0 115 0 108 Ω
with ± 15 V @ I
PN
[± A
DC
] 0 335 0 327 Ω
@ I
PN
[A
RMS
]
2)
0 195 0 188 Ω
I
SN
Secondary nominal current rms 25 mA
K
N
Conversion ratio 1 : 2000
V
C
Supply voltage (± 5 %) ± 12 .. 15 V
I
C
Current consumption 10 (@ ± 15V) + I
S
mA
Accuracy - Dynamic performance data
X Accuracy
3)
@ I
PN,
T
A
= 25°C ± 0.25 %
ε
L
Linearity error < 0.15 %
Typ Max
I
O
Offset current @ T
A
= 25°C ± 0.15 mA
I
OM
Magnetic offset current @ I
P
= 0 and specified R
M
,
after an overload of 5 x I
PN
± 0.10 ± 0.15 mA
I
OT
Temperature variation of I
O
0°C .. + 70°C ± 0.10 ± 0.30 mA
- 25°C .. + 85°C ± 0.10 ± 0.40 mA
t
r a
Reaction time @ 10 % of I
PN
< 200 ns
t
r
Response time
4)
to 90 % of I
PN
step < 500 ns
di/dt di/dt accurately followed > 200 A/µs
BW Frequency bandwidth (- 1 dB) DC .. 200 kHz
General data
T
A
Ambient operating temperature - 25 .. + 85 °C
T
S
Ambient storage temperature - 40 .. + 90 °C
R
S
Secondary coil resistance @ T
A
= 70°C 115 Ω
@ T
A
= 85°C 121 Ω
m Mass 22 g
Standards EN 50178: 1997
Notes:
1)
For 10 s, with R
M
≤ 71 Ω (V
C
= ± 15 V)
2)
50 Hz Sinusoidal
3)
Without I
O
& I
OM
4)
With a di/dt of 100 A/µs.
I
PN
= 50 A
16010
Features
• Closed loop (compensated) current
transducer using the Hall effect
• 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
applications.
Application domain
• Industrial.