YWBL-WH AC Current Sensing Switch, 0.2-30A Self-Powered Monitoring Relay, Normally Closed, Industrial Control Equipment Sensor

• Compared with traditional transformer and thermal protector, it has the advantages of and long service life.
• Using the electromagnetic mutual inductance principle of current, the advanced switch output detection, monitoring and alarm type products without power supply technology are adopted.
• Widely used in substation, frequency control device, inverter device, electrolytic plating, electric locomotive, street lamp monitoring, coal mine and other need current monitoring automation industry.
• Control of various automatic industrial control equipment, flash, buzzer, relay, single chip, or other power load equipment.
• The current-sensing switch is for , convenient monitoring or detecting the current of electric equipment. An ideal choice for automatic industrial control equipment and electric power monitoring.

• Prepare Conductor — Identify the AC conductor you need to monitor. Ensure the conductor's diameter does not exceed the switch's 9mm threading hole diameter. If using a split-core model, ensure it can be opened and clamped around the existing wire.
• Install and Wire — Thread the AC conductor through the switch's aperture. Connect the normally closed output terminals to your control circuit (e.g., relay, PLC input, alarm). Since it's self-powered, no external power connection is needed for the switch itself.
• Configure and Test — Power on the monitored equipment. Observe the red and green indicator lights on the switch. Test the output by simulating current conditions within the 0.2A-30A range to ensure it triggers correctly and controls your connected device as expected.

Typical situations where YWBL-WH AC Current Sensing Switch helps — illustrative scenarios, not customer reviews.