LB500-S Datasheet, PDF (1/2 Pages) LEM – Current Transducer LB 500-S/SP1

Current Transducer LB 500-S/SP1
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).
Preliminary
I_PN = 500 A
Electrical data
I_PN
Primary nominal r.m.s. current
I_P
Primary current, measuring range
R_M Measuring resistance
with ± 15 V
@ ± 500 A _max
@ ± 750 A _max
I_SN
Secondary nominal r.m.s. current
K _N Conversion ratio
V_C
Supply voltage (± 5 %)
I_C
Current consumption
V_d
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
Accuracy - Dynamic performance data
X
ε_L
Accuracy @ I_PN, T_A = 25°C
Linearity
I_O
I_OT
t_r
di/dt
f
Offset current @ I_P = 0, T_A = 25°C
Thermal drift of I_O
+ 10°C .. + 50°C
Response time ²⁾ @ 90 % of I_PN
di/dt accurately followed
Frequency bandwidth (- 1 dB)
Zero crossing distortion
General data
T_A
Ambient operating temperature
T_S
Ambient storage temperature
R _S Secondary coil resistance @ T_A = 50°C
m
Mass
Standards
Notes : ¹⁾ Between primary and secondary.
2) _{With a di/dt of 100 A/µs}
500
A
0 .. ± 750
A
R_{M min}
R_{M max}
5
33
Ω
5
15
Ω
200
mA
1 : 2500
± 15
V
20 + I_S
mA
6 ¹⁾
kV
± 0.5
%
< 0.1
%
Typ Max
± 0.500 mA
± 0.064 mA
<1
> 50
DC .. 150
negligeable
µs
A/µs
kHz
+ 10 .. + 50
°C
- 25 .. + 85
°C
30
Ω
670
g
EN 50178
Features
• Closed loop (compensated) current
transducer using the Hall effect
• Insulated plastic case recognized
according to UL 94-V0.
Special features
• V_C = ± 15 (± 5 %) V
• K _N = 1 : 2500
• Low thermal offset drift with
temperature
• Better zero crossing performance
• T_A = + 10°C .. + 50°C
• Shield between primary and
secondary connected to V_C " - "
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
• HVDC transmisions.
990803/2
LEM Components
www.lem.com