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Non-invasive electrical current sensor using YHDC SCT-010 and an Arduino based PLC
Introduction
The SCT-010 family are sensors of non-invasive currents that allow to measure the intensity that crosses a conductor without needing to cut or modify the conductor. We can use these sensors with a processor like M-Duino or 20 I/Os family products to measure the intensity or power consumed by a load.
The SCT-010 sensors are current transformers, instrumentation devices that provide a measurement proportional to the intensity that a circuit crosses. The measurement is made by electromagnetic induction. SCT-010 sensors have a split ferromagnetic core (like a clamp) that allows you to open it to wind a conductor of an electrical installation without having to cut it.
Within the SCT-010 family, there are models that provide measurement as an intensity or voltage output. As much as possible, the normal thing is that we prefer voltage output because the connection is simpler.
Requirements
Ethernet PLC or 20 I/Os PLC: Ethernet PLC 20 I/Os PLC
YHDC SCT010T-D 50A/5V DC: YHDC SCT010T-D Current sensor
Industrial Shields boards: How to use the mapping pins of Industrial Shields boards
Description
YHDC SCT010T-D Current Sensor:
| Characteristics | |||||||||||
| Rated input | 50 A | ||||||||||
| Rated Power | 0-5Vdc | ||||||||||
| Maximum allowable current | 100% (continuous), 150% (1min) | ||||||||||
| Output impedance | 7.5KΩ | ||||||||||
| Output ripple voltage | ≤5% of the output voltage | ||||||||||
| Response time | 300ms | ||||||||||
| Working frequency | 50-60Hz | ||||||||||
Other important data:
Precision / Linearity: Dynamic range +/- 2% (F.S 1: 100 50 / 60Hz sine wave)
Operating temperature: -20 ... +50 ℃
Storage temperature: -30 .. + 90 ℃
Dielectric strength: 2.5KV
Fire resistance: UL94-V0M
Mounting type: Suspended
Suspension Weight: 45g
Outline size diagram (mm):
Connections
Wiring diagram:
YHDC SCT010T-D Current Sensor - Arduino Based PLC:
-L --> GND
+K --> I0_11
Final Connection:
Software
This simple sketch allows us to perform analog readings of the YHDL SCT010T-D current sensor every 0.5 sec. For this we have used the entry I0.11 of our M-Duino. You can use any of the analog inputs available on your computer.
As a test we will check the result monitored by the serial port.
/*
Copyright (c) 2018 Boot&Work Corp., S.L. All rights reserved
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
////////////////////////////////////////////////////////////////////////////////////////////////////
void setup() {
Serial.begin(9600L);
Serial.println("yhdc-sct010t-d started");
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void loop() {
uint16_t value = analogRead(I0_11);
Serial.println(value);
delay(500);
}
