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<ul><li>Features: 
5A over-current protection sensor module. 
Uses current transformer to collect the AC signal to achieve the relay over-current signal output within 0-5A. 
Relay pull while over-current, relay released while not over-current. 
Users can use the relay COM, NC, NO three ports to control the external circuit on and off, in order to achieve over-current protection. 
Over-current signal setting critical point is adjustable. 
Specification: 
Type: 5A 5V Relay Module 
Working voltage: DC5V 
Working current: &lt;20MA 
Operating frequency range: 20Hz-400Hz 
Output mode: switch signal output 
Maximum detection wire diameter: 5.2mm 
Mounting hole: hole diameter is 3mm, hole pitch is 52.5mm 
Operating environment: -40℃ - 85℃ 
Current detection range: AC0.3A-5A 
Board size: Approx. 38 * 44mm / 1.5 * 1.7in 
Weight: Approx. 27g 
Package list: 
1 * Module 
Functions: 
Current detection resolution can change the parameter of resistance parameters. 
Output over-current switching signal output. 
Over-current signal setting critical point is adjustable. 
Board 
VCC: Operating voltage positive; 
GND :Operating voltage negative; 
NO: Normally open, the relay pulls before the NO and COM disconnect, short-circuit after the suction; 
COM: common, relay common interface; 
NC: Normally closed, the relay before the NC and COM short-circuit, after pull off. 
Using Instructions: 
By setting the potentiometer to set the overcurrent protection point, the clockwise adjustment can reduce the detection current. 
As bellows: 
1. Measured the wire through the current transformer , connect VCC and GND to DC5V power supply; 
2. Adjust the potentiometer, when you hear the sound of the relay pull (can be measured with a multimeter, to see if COM and NO was turned on, and if connected to the relay means activated), then reduce or cut off the current flowing that through the tested wire , if the relay release at this time that over-current protection point has been identified (can use multimeter to see if COM and NC was connected, if connected to the relay means been released); 
3. When reduce or cut off the current flowing through the wire , the relay is not released, will still need to continue to adjust the potentiometer to find the over-current protection point. 
.</li></ul>

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5V 0‑5A AC Current Detection Sensor Module Relay Module Overcurrent Protection

Features: 
5A over-current protection sensor module. 
Uses current transformer to collect the AC signal to achieve the relay over-current signal output within 0-5A. 
Relay pull while over-current, relay released while not over-current. 
Users can use the relay COM, NC, NO three ports to control the external circuit on and off, in order to achieve over-current protection. 
Over-current signal setting critical point is adjustable. 
Specification: 
Type: 5A 5V Relay Module 
Working voltage: DC5V 
Working current: &lt;20MA 
Operating frequency range: 20Hz-400Hz 
Output mode: switch signal output 
Maximum detection wire diameter: 5.2mm 
Mounting hole: hole diameter is 3mm, hole pitch is 52.5mm 
Operating environment: -40℃ - 85℃ 
Current detection range: AC0.3A-5A 
Board size: Approx. 38 * 44mm / 1.5 * 1.7in 
Weight: Approx. 27g 
Package list: 
1 * Module 
Functions: 
Current detection resolution can change the parameter of resistance parameters. 
Output over-current switching signal output. 
Over-current signal setting critical point is adjustable. 
Board 
VCC: Operating voltage positive; 
GND :Operating voltage negative; 
NO: Normally open, the relay pulls before the NO and COM disconnect, short-circuit after the suction; 
COM: common, relay common interface; 
NC: Normally closed, the relay before the NC and COM short-circuit, after pull off. 
Using Instructions: 
By setting the potentiometer to set the overcurrent protection point, the clockwise adjustment can reduce the detection current. 
As bellows: 
1. Measured the wire through the current transformer , connect VCC and GND to DC5V power supply; 
2. Adjust the potentiometer, when you hear the sound of the relay pull (can be measured with a multimeter, to see if COM and NO was turned on, and if connected to the relay means activated), then reduce or cut off the current flowing that through the tested wire , if the relay release at this time that over-current protection point has been identified (can use multimeter to see if COM and NC was connected, if connected to the relay means been released); 
3. When reduce or cut off the current flowing through the wire , the relay is not released, will still need to continue to adjust the potentiometer to find the over-current protection point. 
.