Current Transducer CT 5 .. 25-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
=
5 .. 25 A
0632
Electrical data
Primary nominal
current
I
PN
(A r.m.s.)
5
10
25
Primary current,
measuring range
I
P
(A)
7.5
15
37.5
Conversion
ratio
K
N
(A/V)
5 A/5 V
10 A/ 5 V
25 A/5 V
CT 5-T
CT 10-T
CT 25-T
Type
Features
•
Closed loop (compensated) current
transducer
•
Insulated plastic case recognized
according to UL 94-V0
•
Patent pending.
V
Ω
nF
s
V
mA
V
O U T
R
L
C
L
t
C
V
C
I
C
Analog output voltage
Load resistance
Capacitance loading
Output short-circuit duration
1)
Supply voltage (± 5 %)
Current consumption
5
>
500
≤
5
Advanced features
•
f
= 500 kHz
•
X
G
= ± 0.1 % (- 25°C .. + 70°C).
∞
± 15
30 +
V
OUT
/
R
L
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.
Accuracy - Dynamic performance data
X
G
V
O
f
t
r
Overall accuracy @
I
PN
Offset voltage @
I
P
= 0
- 25°C .. + 70°C
T
A
= 25°C
- 25°C .. + 70°C
± 0.1
Max
± 0.4
± 0.6
DC .. 500
<1
%
mV
mV
kHz
µs
Frequency bandwidth (- 3 dB) @ 10 % of
I
PN
Response time
Applications
•
AC variable speed drives and servo
General data
T
A
T
S
m
Ambient operating temperature
Ambient storage temperature
Mass
Standards
- 25 .. + 70
°C
- 40 .. + 85
°C
670
g
EN 50178 : 1996
•
•
•
•
•
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.
Note :
1)
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.
Application domain
•
Industrial.
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060927/0
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
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LEM [ LEM ]
