Retractable Overhead Fault Indicator JDX Grounding Locator

As a professional manufacturer in China, Comewill's high-quality Retractable Overhead Fault Indicator JDX Grounding Locator uses non-contact electromagnetic induction as its detection principle, providing a clear visual indication of a short-circuit fault through a red flip-up sign. The device shell is treated with anti-aging materials, and the display uses fluorescent materials, ensuring clear visibility even at night. For customers requiring constant inventory or customized parameters, this high-quality product is supplied directly from the factory at a competitive low price, helping maintenance teams shorten fault location time.

The Retractable Overhead Fault Indicator JDX Grounding Locator is a fault location device developed by Comewill for overhead power distribution lines. This device monitors changes in line current using electromagnetic induction. When a short-circuit fault occurs, it activates a mechanical flip-up mechanism to display a red fault indicator. Its structure utilizes a one-piece molding process combined with nano-surface treatment technology, giving it anti-fouling and anti-aging properties, making it suitable for long-term operation in outdoor overhead lines.

Core Working Principle

1. Fault Detection Logic

The Retractable Overhead Fault Indicator JDX Grounding Locator detects faults based on the sudden change in current during a short circuit. When a short-circuit fault occurs, the fault current flows through the installation point. The current detection element inside the device senses the sudden change in current, and simultaneously, subsequent protection actions cause the line to lose power. These two conditions together constitute the basis for the action.

The JDX fault indicator, installed on the overhead line, works by detecting the line current using electromagnetic induction. Under normal operating conditions, the device is in a low-power standby mode; when a short-circuit current passes through, the induced signal exceeds a preset threshold, triggering the drive mechanism.

2. Fault Location Method

In actual inspections, multiple JDX indicators are installed at intervals along the line. When a fault occurs, all indicators from the power supply side to the fault point will turn red, while indicators behind the fault point remain white. Inspectors only need to observe the indicator status along the route; the section between the last red indicator and the first white indicator is the fault location. This method reduces the workload of traditional full-line inspections to local section checks, significantly improving fault location efficiency.

3. Reset Mechanism

After the fault is cleared and power is restored, the equipment automatically resets after a preset time. The Retractable Overhead Fault Indicator JDX Grounding Locator offers selectable reset times of 6, 12, 24, and 36 hours to adapt to the operational needs of different lines, eliminating the need for manual reset by personnel climbing the pole.

Product Structure and Material Characteristics

1. Shell Material

The Retractable Overhead Fault Indicator JDX Grounding Locator is molded in one piece using high-strength aerospace materials and nanotechnology. The shell possesses the following characteristics:

High transparency: Facilitates observation of the internal flip-up status

Stain resistance: Dirt does not easily adhere to the surface

Aging resistance: Does not become brittle under prolonged outdoor sun exposure

Maintenance-free: Requires no additional maintenance during its designed lifespan

2. Core Component Composition

3. Display Method

The Retractable Overhead Fault Indicator JDX Grounding Locator uses a mechanical flip-top display. It is white in normal operation and turns red when flipped up to indicate a fault. The red side is coated with fluorescent material, making it highly visible in natural daylight and still identifiable at night or in low-light conditions. As the manufacturer, Comewill prioritizes weather resistance in its selection of display materials, ensuring that the rotating components do not fade or deform under long-term UV exposure.

Installation Scenarios & Sensing Methods: Safe & Versatile

These indicators are pretty flexible when it comes to where they can go. We install ’em on overhead lines (the ones on utility poles), overhead cables, underground cables (the ones buried under cities), and even on busbars inside switchgear cabinets. Basically, anywhere short-circuit faults might pop up in the distribution system.
Because they’re used in so many different spots, their sensing methods are designed to be safe — no direct contact with live parts. For voltage detection, they sense the spatial electric field potential gradient around the line. For current detection, they use electromagnetic induction — kind of like how a transformer works. This non-contact design is a game-changer: it keeps the device (and us) safe from high voltage, and makes installation way easier. We don’t have to cut the line or shut off power to mount ’em — just clamp ’em on and go.

OPERATIONAL PRINCIPLE

Short circuit detection principle:
Based on the characteristics of short circuit phenomena, the sudden change in current during a short circuit accompanied by the power failure of the protection device is used as the action criterion. The interpretation method for the fault indication diagram is as follows: When indicator lights 2, 5, and 8 of phase A of line 2, no indicator light on phase B, indicator lights 3, 6, and 9 of phase C all turn red, while indicator lights 11 and 12 remain white, it can be determined that a short circuit fault has occurred at that outgoing line point.

TECHNICAL PARAMETER