Current Transducer CT 50-T
For very accurate measurements 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
Preliminary
Electrical data
I
P N
I
P
V
O U T
K
N
R
L
C
L
t
C
V
C
I
C
V
d
Primary nominal r.m.s. current
Primary current, measuring range
Analog output voltage
Conversion ratio
Load resistance
Capacitance loading
Output short-circuit duration
1)
Supply voltage (± 5 %)
Current consumption
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
50
0 .. ± 75
5
50 A / 5 V
>
500
≤
5
A
A
V
Ω
nF
s
V
mA
kV
Features
•
Closed loop (compensated) current
transducer
•
Insulated plastic case recognized
according to UL 94-V0
•
Patent pending.
∞
± 15
90 +
V
OUT
/
R
L
6
Advanced features
•
f
= 500 kHz
•
X
G
= ± 0.1 % (- 25°C .. + 70°C).
Accuracy - Dynamic performance data
X
G
V
O
f
Overall accuracy @
I
PN
Offset voltage @
I
P
= 0
- 25°C .. + 70°C
T
A
= 25°C
- 25°C .. + 70°C
± 0.1
Typ
Max
± 0.4
± 0.6
%
mV
mV
kHz
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.
- 25 .. + 70
- 40 .. + 85
670
EN 50178
°C
°C
g
Frequency bandwidth (- 3 dB) @ 10 % of
I
PN
DC .. 500
General data
T
A
T
S
m
Ambient operating temperature
Ambient storage temperature
Mass
Standards
2)
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.
Notes :
1)
2)
If the short-circuit has a duration more than 1 s, the primary current of
the supply voltage must be interrupted for a short time to restore the
transducer to proper working order. The internal protection is done by
PTC resistors
A list of corresponding tests is available
980814/5
LEM Components
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