Document 132
Current Sensing Transformers
These low cost Coilcraft current sensing transformers are designed for use up to 100 kHz. They incorporate the current and sense windings in one small, encapsulated package requiring minimum board space. Varying the terminating resistance allows sensitivities of 1 to 100 Volts output per Ampere input. Coilcraft current sensing transformers are designed to provide 6 mm creepage/clearance between primary and secondary windings Applications include feedback control, overload sensing, detecting load drop or shutdown, and proportional output. Coilcraft Designer’s Kit P403 contains the three standard current sensing transformers, sensor-only versions of each, plus two 50/60Hz current sensors. To order, contact Coilcraft or visit http://order.coilcraft.com.
Part number
CS4050V-01L CS4100V-01L CS4200V-01L
1. 2. 3. 4. 5.
Turns (N) pri : sec
1 : 50 1 : 100 1 : 200
Inductance1 min (mH)
5 20 80
Frequency range2 (kHz)
5 – 25 5 – 50 1 – 100
Sensed current range Iin
2 mA – 10 A 5 mA – 24 A 5 mA – 35 A
Terminating resistance RT3 range (Ohms)
50 – 5000 100 – 10,000 200 – 20,000
RT for 1 Vout from 1 A Iin
50 Ohms 100 Ohms 200 Ohms
Typical Circuit
2
Inductance is for the secondary, measured at 15.75 kHz, 1 Vrms. Square wave response deteriorates above and below this frequency. Varying terminating resistance increases or decreases output Voltage/Ampere according to the following equation: RT = Vout × Nsec / Iin Operating temperature range –40°C to +85°C. Electrical specifications at 25°C. COILCRAFT CS-4xxxV 906 xxx 0.75
1
19,05
max
I in
0.105/0.150 2,67/3,81
Pri
3
Sec
4
RT
Vout
CURRENT
SENSE
0.30 ±0.005 7,62 ±0,125
2 1
0.77 max 19,56 0.40 ±0.01 10,16 ±0,25
0.03 0,76
0.57 max 14,48
0.069 1,76 0.20 ±0.005 5,08 ±0,125 0.052 1,321
3
4
C L
0.041 1,041
0.088 2,23
3
C L
4
2
1
Recommended PC Board Layout
0.060 × 0.460 1,52 × 11,68
Weight: 8.8 – 9.3 g Terminations: Tin-silver over copper Packaging: 28 per tube
Specifications subject to change without notice. Please check our website for latest information.
Document 132
Revised 03/20/07
© Coilcraft, Inc. 2008
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