Current sensor 2mA/2mA Current Transformer voltmeter wattmeter energy meter use
1pcs/Lot
A current transformer (CT) is an electric
device that produces an Alternating_current (AC) in its secondary which is
proportional to the AC in its primary.Here is 2mA in Primary and 2mA in secondary.
Typically used for voltmeter wattmeter energy meter etc.
Specifiaction
- Accuracy:+/-0.3%
- Phase error:+/-23'
- Frequency:50-60Hz
- Insulation Resistance:100M ohm@500Vdc
An application example:
Input 100V, output 5V, the component pick up:
R’=100V/2ma=50K ohm, pick up 51K ohm/1Watt here;
I=100V/(51K+110) ohm=1.96mA, 110 ohm is coil primary resistance;
R=5V/1.96mA=2.55K Ohm, pick up R=2.5 Kohm, and series added various resistor to tune it;
C and r’ is for compensation and phase-shift, normally C is 0.01-0.03uF, r’ is variable resistor(200 ohm- 300K ohm)