Is this AC current sensing switch safe for use in India?

Yes, this AC current sensing switch is designed for industrial applications and operates on standard AC voltages up to 240V, compatible with India's 230V mains. It is self-powered and built with a fireproof ABS shell. For safe installation, always ensure wiring is performed by a qualified electrician according to local electrical codes.

How do I choose the right current sensing switch for my application?

Consider the maximum current you need to monitor (this switch handles 0.2-30A AC) and the type of output required (Normally Open or Normally Closed relay). Ensure the threading hole diameter (9mm) fits your conductor and the operating voltage (12-240VAC/DC) matches your control circuit. This self-powered model simplifies installation by not needing external power.

How to use the YWBL-WH AC Current Sensing Switch?

Install the switch by threading the AC conductor through the 9mm aperture. Connect the relay output terminals to your control circuit, such as a PLC input or a contactor coil. The switch activates based on the monitored current, providing a signal without external power. Refer to the user manual for specific wiring diagrams.

What is the best AC current sensing switch for industrial automation?

The YWBL-WH AC Current Sensing Switch is a strong contender for industrial automation due to its self-powered design, wide current range (0.2-30A), and reliable relay output. It simplifies wiring and integrates directly with control systems, offering a cost-effective solution for load monitoring and equipment response.

Can I use this current sensing switch daily for load monitoring?

Yes, this switch is designed for continuous industrial applications and features a long service life. Its robust construction and self-powered operation make it suitable for daily load monitoring and automation control tasks in various industrial environments.

What are the benefits of using a self-powered current sensing switch?

Self-powered operation eliminates the need for external power supplies or batteries, simplifying installation and reducing wiring complexity. It also lowers operational costs and removes potential points of failure associated with separate power sources, making it ideal for retrofits and compact enclosures.

Are there any side effects of using an AC current sensing switch?

This device is a passive component designed for monitoring and control. When installed correctly by a qualified electrician, there are no inherent side effects. Ensure the switch's specifications (voltage, current, contact rating) are compatible with your system to prevent operational issues.

What are the benefits of this AC current sensing switch?

Key benefits include its self-powered operation, wide current monitoring range (0.2-30A), direct control of automation devices via a relay output, and durable fireproof ABS construction with IP30 rating. It simplifies installation and reduces wiring complexity in industrial settings.

YWBL-WH Red Electronic Switch | Current Sensing Relay for Power Monitoring

Name: YWBL-WH AC Current Sensing Switch 0.2-30A | Self-Powered Relay for Electrical Panel Protection
Brand: YWBL-WH
SKU: gwy4514
Price: 2979.00 INR
Availability: InStock

About this item

The YWBL-WH AC Current Sensing Switch offers a self-powered, non-intrusive solution for monitoring electrical loads from 0.2A to 30A. It uses electromagnetic induction, eliminating the need for external power supplies or batteries. This makes installation simple, especially in retrofits within electrical panels or junction boxes. The switch provides a relay output for direct control of industrial automation devices, buzzers, and microcontrollers, reducing wiring complexity.

With a wide current detection range of 0.2-30A and ±3% accuracy at 60Hz, this sensor enables reliable load tracking for various applications. It supports both Normally Open (NO) and Normally Closed (NC) configurations, with a switch capacity of 0.5A at 12-240VAC/DC. The fireproof ABS shell and IP30 rating ensure durability in industrial environments, operating between -10~55°C.

This current sensing switch is ideal for substations, frequency control devices, and street lamp monitoring. It offers advantages over traditional transformers and thermal protectors with its long service life. Imported directly for Indian customers, all customs duties and GST are included in the price. Delivery is handled via ExpressBox for secure transit.

Key Features

Multifunctional Control: AC Current Sensing Switch enables direct control of industrial automation devices including flash units, buzzers, relays, microcontrollers, and power loads without signal conversion hardware. Supports 5–200A detection range and 120V/240V AC systems. Integrates into existing control loops for immediate equipment response. Reduces wiring complexity in factory machine interfaces and maintenance panels.
Wide Current Detection Range: AC Current Sensing Switch delivers precise real-time monitoring across 5 to 200 amps (200A = 440A peak), compatible with standard North branch circuits. Features ±3% accuracy at 60Hz and operates from 45–400Hz. Enables reliable load tracking for HVAC compressors, lighting arrays, and motor starters in commercial buildings.
Self-powered Passive Technology: AC Current Sensing Switch uses electromagnetic induction to generate operating power directly from measured current—zero external wiring or batteries required. No power supply footprint or voltage compatibility checks needed. Simplifies retrofit installation in tight enclosures like breaker panels and junction boxes.
Extensive Industrial Applications: 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.
Advantages: Compared with traditional transformer and thermal protector, it has the advantages of , and long service life.

Why choose this product

Reliable Industrial Automation Control

This YWBL-WH AC Current Sensing Switch provides robust monitoring for industrial automation. Its self-powered design simplifies installation, while the wide current range and relay output ensure seamless integration with control systems. Unlike basic sensors, it offers direct control capabilities, reducing the need for complex signal conversion hardware. It's built for demanding environments, ensuring consistent performance in substations and factory settings. All customs duties and GST are pre-paid for a transparent purchase experience in India.

Who It's For vs. Who Should Skip It

Ideal for electricians, automation engineers, and maintenance professionals needing to monitor and control electrical loads in industrial settings, substations, or commercial buildings. It's perfect for retrofitting into existing panels or new installations requiring precise current monitoring. Skip this if you need to monitor DC current, as it is designed exclusively for AC circuits. Also, if your application requires a current rating significantly above 30A or a higher IP rating for extreme environmental protection, consider specialized industrial equipment.

How to use

Locate the AC power conductor for the device or circuit you need to monitor. Ensure the conductor's diameter is suitable for the switch's 9mm threading hole. — Identify Conductor
Carefully thread the identified AC conductor through the switch's aperture. Mount the switch securely using its flat installation design onto a suitable surface within the electrical panel or enclosure. — Install Switch
Connect the relay output terminals (Normally Open or Normally Closed, as per your requirement) to your control system, such as a PLC input, alarm, or contactor coil, ensuring compatibility with the 0.5A@12-240VAC/DC switch capacity. — Wire Relay Output
Energize the monitored circuit and observe the switch's indicator light. Test the relay output by verifying it triggers correctly when the current crosses the set threshold, confirming proper function for load monitoring. — Test Operation

Example scenarios

Typical situations where YWBL-WH AC Current Sensing Switch 0.2-30A | Self-Powered Relay for Electrical Panel Protection helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

An industrial facility in Pune needs to monitor the current draw of a critical motor to prevent overload and ensure timely maintenance.

How this product helps

The YWBL-WH AC Current Sensing Switch can be installed non-intrusively around the motor's power cable. Its self-powered relay output can trigger an alarm or shut down the motor if current exceeds the 30A limit, protecting equipment and preventing costly downtime.

Scenario 2

Illustrative example

Where it helps

A solar panel installation company in Rajasthan requires a system to monitor the AC output from inverters for load balancing and performance tracking.

How this product helps

This switch can be integrated into the AC output circuit of the inverter. It provides real-time current monitoring and can signal a control system to adjust load distribution or alert operators to performance anomalies, ensuring optimal energy generation.

Specifications

Composition

Sensing Technology	Electromagnetic Induction
Contact Material	Metal

Usage

Compatible Devices	Industrial automation devices, flash units, buzzers, relays, microcontrollers, power loads, substations, frequency control devices, inverter devices, electric locomotives, street lamp monitoring, coal mines.
Operating Voltage	12-240 VAC/DC
Max Current Rating	30A
Detection Range	0.2A - 30A
Accuracy	±3% @ 60Hz
Installation Type	Flat Installation / Surface Mount
Terminal Type	Screw Terminals

How we compare

Feature	YWBL-WH AC Current	Others
Power Source	Self-powered via electromagnetic induction; no external power needed.	May require separate 12-240V AC/DC power supply; installation complexity varies.
Current Range	0.2A - 30A AC	Varies by brand; common ranges include 5-100A or 10-200A. Check specific models.
Output Type	Normally Open/Normally Closed relay output (0.5A@12-240VAC/DC)	Typically offers NO/NC relay outputs; contact ratings vary significantly.
Installation	Non-intrusive, 9mm threading hole, flat mount, simple wiring.	Solid-core requires conductor threading; split-core clamps around existing wire. Mounting options vary.
Durability	Fireproof ABS shell, IP30 rating, -10~55°C operating temp.	Materials and IP ratings vary; industrial-grade options available.

SKU	gwy4514
GTIN	0738674419384
Brand	YWBL-WH
Model	YWBL-WHhxgnqre5cf-01
Switch Type	Normally Open/Normally Closed (Optional)
Power Supply	Self-Powered
Starting Current Range	0.2-30A
Frequency Range	40-400Hz
Startup Time	<0.1 Seconds
Switch Capacity	0.5A@12-240VAC/DC
Overload Capacity	+100%@30A
Threading Hole Diameter	9mm
Indicator Light	Red and Green
Installation Form	Flat Installation
Shell Material	Fireproof ABS
Working Temperature	-10~55 °C
Working Humidity	0-95% (No Condensation)
IP Rating	IP30
Dimensions	46 x 65 x 25mm / 1.81 x 2.56 x 0.98in
Item Weight	0.06 kg (0.13 lb)
Package Weight	0.07 kg (0.15 lb)
Country of Origin	Not stated by manufacturer — US retail version, sourced from authorized US retailers

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YWBL-WH AC Current Sensing Switch 0.2-30A | Self-Powered Relay for Electrical Panel Protection

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