Datasheet

071003/10
www.lem.com
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
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Current Transducer LF 505-S
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 500 A
I
PM
Primary current, measuring range 0 .. ± 800 A
R
M
Measuring resistance R
M mini
R
M maxi
with ± 15 V @ ± 500 A
maxi
0 60 Ω
@ ± 800 A
maxi
0 11 Ω
with ± 18 V @ ± 500 A
maxi
0 92 Ω
@ ± 800 A
maxi
0 30 Ω
with ± 24 V @ ± 500 A
maxi
5 149 Ω
@ ± 800 A
maxi
5 65 Ω
I
SN
Secondary nominal current rms 100 mA
K
N
Conversion ratio 1 : 5000
V
C
Supply voltage (± 5 %) ± 15 .. 24 V
I
C
Current consumption (± 1 mA) 24 (@ ± 18 V) + I
S
mA
Accuracy - Dynamic performance data
X Accuracy @ I
PN
, T
A
= 25°C ± 0.6 %
ε
L
Linearity error < 0.1 %
Typ Maxi
I
O
Offset current @ I
P
= 0, T
A
= 25°C ± 0.4 mA
I
OM
Magnetic offset current @ I
P
= 0 and specified R
M
,
after an overload of 3 x I
PN
± 0.2 mA
I
OT
Temperature variation of I
O
- 40°C .. + 70°C ± 0.1 ± 0.4 mA
t
r
Response time
1)
to 90 % of I
PN
step < 1 µs
di/dt di/dt accurately followed > 100 A/µs
BW Frequency bandwidth (- 1 dB) DC .. 100 kHz
General data
T
A
Ambient operating temperature - 40 .. + 70 °C
T
S
Ambient storage temperature - 40 .. + 85 °C
R
S
Secondary coil resistance @ T
A
= 70°C 70 Ω
m Mass 230 g
Standards EN 50155: 1995
EN 50178: 1997
Note:
1)
With a di/dt of 100 A/µs.
Features
• Closed loop (compensated) current
transducer using the Hall effect
• 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.
I
PN
= 500 A
Applications domain
• Traction
• Industrial.
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