Current Transducer CT 5 .. 25-T
IPN = 5 .. 25 A
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).
0632
Electrical data
Primarynominal
current
Primary current,
measuring range
Conversion
ratio
Type
Features
· Closed loop (compensated) current
transducer
IPN (A r.m.s.)
IP (A)
K N (A/V)
5
10
25
7.5
15
37.5
5 A/5 V
10 A/ 5 V
25 A/5 V
CT 5-T
CT 10-T
CT 25-T
· Insulated plastic case recognized
according to UL 94-V0
· Patent pending.
VOUT Analog output voltage
5
V
W
nF
s
RL
CL
tC
VC
IC
Load resistance
> 500
£ 5
Advanced features
Capacitance loading
Output short-circuit duration 1)
Supply voltage (± 5 %)
Current consumption
· f = 500 kHz
· XG = ± 0.1 % (- 25°C .. + 70°C).
¥
± 15
V
30 + VOUT /RL mA
Advantages
· Excellent accuracy
· Very good linearity
Accuracy - Dynamic performance data
· Low temperature drift
· Optimized response time
· Wide frequency bandwidth
· No insertion losses
· High immunity to external
interference
XG
VO
Overall accuracy @ IPN
Offset voltage @ IP = 0
- 25°C .. + 70°C
± 0.1
%
Max
± 0.4
± 0.6
TA = 25°C
- 25°C .. + 70°C
mV
mV
· Current overload capability.
f
tr
Frequency bandwidth (- 3 dB) @ 10 % of I PN
Response time
DC .. 500
< 1
kHz
µ s
Applications
· AC variable speed drives and servo
motor drives
General data
· Static converters for DC motor drives
· Battery supplied applications
· Uninterruptible Power Supplies
(UPS)
· Switched Mode Power Supplies
(SMPS)
TA
TS
m
Ambient operating temperature
Ambient storage temperature
Mass
- 25 .. + 70
- 40 .. + 85
670
°C
°C
g
Standards
EN 50178 : 1996
· Power supplies for welding
applications.
Applicationdomain
1)
Note :
If the short-circuit has a duration more than 1 s, the primary current of
· Industrial.
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.
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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
www.lem.com