Datasheet

LEM www.lem.com
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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
070424/9
Current Transducer LF 306-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 r.m.s. current 300 A
I
P
Primary current, measuring range 0 .. ± 500 A
R
M
Measuring resistance R
M min
R
M max
with ± 12 V @ ± 300 A
max
0 37 Ω
@ ± 500 A
max
0 8 Ω
with ± 15 V @ ± 300 A
max
10 56 Ω
@ ± 500 A
max
10 20 Ω
I
SN
Secondary nominal r.m.s. current 150 mA
K
N
Conversion ratio 1 : 2000
V
C
Supply voltage (± 5 %) ± 12 .. 15 V
I
C
Current consumption 20 (@ ± 15 V) + I
S
mA
Accuracy - Dynamic performance data
X
G
Overall accuracy @ I
PN
, T
A
= 25°C ± 0.4 %
ε
L
Linearity error < 0.1 %
Typ Max
I
O
Offset current @ I
P
= 0, T
A
= 25°C ± 0.20 mA
I
OM
Residual current
1)
@ I
P
= 0, after an overload of 3 x I
PN
± 0.08 mA
I
OT
Thermal drift of I
O
- 25°C .. + 70°C ± 0.20 ± 0.64 mA
t
ra
Reaction time @ 10 % of I
P max
< 500 ns
t
r
Response time
2)
@ 90 % of I
PN
< 1 µs
di/dt di/dt accurately followed > 100 A/µs
f Frequency bandwidth (- 1 dB) DC .. 100 kHz
General data
T
A
Ambient operating temperature - 25 .. + 70 °C
T
S
Ambient storage temperature - 40 .. + 90 °C
R
S
Secondary coil resistance @ T
A
= 70°C 34 Ω
m Mass 60 g
Standards EN 50178 : 1997
Notes :
1)
The result of the coercive field of the magnetic circuit
2)
With a di/dt of 100 A/µs.
Features
• Closed loop (compensated) current
transducer using the Hall effect
• 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.
I
PN
= 300 A
16130