The quality Four-in-one Compression Spring Suspended Fault Indicator JDG-F from Comewill is an electromagnetic fault detection device used in medium and low voltage power distribution systems. It helps field engineers quickly determine the section of a line where a short-circuit fault has occurred.
Working principle
When short-circuit current flows through the monitored conductor, the device detects the sudden current change.
The mechanism triggers a visible red fault indicator card.
Maintenance teams can visually locate the activated indicators along the line.
The fault point is identified between the last activated indicator and the first non-activated indicator.
This clear zoning method significantly reduces inspection time compared with manual line patrols.
The Comewill customized Four-in-one Compression Spring Suspended Fault Indicator JDG-F is widely used in power distribution networks where fast fault location helps reduce outage duration and improve maintenance efficiency.
A complete Four-in-one Compression Spring Suspended Fault Indicator JDG-F integrates several functional modules that work together to ensure reliable detection and indication.
Current and Voltage Detection Module
This module senses changes in current and voltage on the line using electromagnetic induction and electric field detection. These sensing methods do not require direct contact with energized conductors, helping improve installation safety.
Fault Discrimination Circuit
The internal circuit analyzes signal variations to distinguish actual short-circuit faults from temporary fluctuations or load changes. Imported electronic components and microcontrollers improve signal processing stability.
Mechanical Indicator Drive System
Once a fault is confirmed, the drive mechanism activates the red fluorescent indicator card, which remains visible until reset. The mechanical structure is designed for outdoor reliability and long-term operation.
Fault Status Display
The device uses bright red fluorescent coating to ensure clear visibility during daylight and under night lighting conditions. The display mechanism resists fading even after long exposure to ultraviolet radiation.
Automatic Delayed Reset
After the fault condition is cleared, the Four-in-one Compression Spring Suspended Fault Indicator JDG-F automatically resets after a preset delay. This function reduces the need for manual intervention in remote locations.
To support long-term outdoor operation, the Comewill Four-in-one Compression Spring Suspended Fault Indicator JDG-F uses specialized materials and structural design.
Aviation-Grade Housing
The outer shell is produced using high-strength aviation materials with one-step molding technology. Nanomaterial surface treatment improves resistance to environmental contamination and aging.
Nickel-Plated Magnetic Components
Key magnetic elements are nickel plated to improve magnetic conductivity and enhance electromagnetic sensing performance.
Weather Resistance
The enclosure structure is designed to resist:
UV radiation
Rain and dust
Pollution buildup
This construction allows the device to maintain stable performance in outdoor power distribution environments.
Reliable operation over many years is essential for distribution line monitoring equipment.
The Four-in-one Compression Spring Suspended Fault Indicator JDG-F includes:
High-performance battery system with a service life exceeding 8 years
Low-power electronic circuit design
Microcontroller-based control for stable operation
These features help ensure that the device continues operating across multiple inspection cycles without frequent maintenance.
The Four-in-one Compression Spring Suspended Fault Indicator JDG-F is designed for live-line installation, which means the device can be mounted without shutting down the distribution line.
Compression Spring Suspended Structure
The indicator uses a card-wire compression spring structure, allowing it to clamp securely onto overhead conductors.
Key installation characteristics include:
Installation without cutting conductors
No need for power outage during installation
Mechanical stability on both bare and insulated conductors
This design helps utilities deploy fault indicators across distribution networks with minimal operational disruption.
The Comewill Four-in-one Compression Spring Suspended Fault Indicator JDG-F is used in several power distribution scenarios:
Overhead Distribution Lines
Installed on utility pole conductors to detect and display short-circuit faults.
Cable Distribution Systems
Used on overhead insulated cables or underground cable transitions.
Distribution Network Monitoring
Helps maintenance teams quickly identify fault sections and organize targeted inspections.
Utility Maintenance Operations
Supports faster troubleshooting and reduces time spent on full-line patrol inspections.
As a China manufacturer and factory, Comewill provides production and supply support for distribution network monitoring devices.
Capabilities include:
OEM and customized product configurations
Stable production capacity for engineering projects
Quality control during manufacturing and assembly
The Comewill Four-in-one Compression Spring Suspended Fault Indicator JDG-F is available for global utilities, engineering contractors, and electrical equipment distributors looking for a China supplier of fault detection devices made in China.
Short circuit detection principle:
Based on the characteristics of short-circuit faults, the action criterion is the sudden change in current accompanied by the power failure of the protection device. The interpretation logic of the fault indication diagram is as follows: if indicators 2, 5, and 8 of phase A and indicators 3, 6, and 9 of phase C of line 2 all turn red, while indicators 11 and 12 remain white, then it can be determined that a short-circuit fault has occurred at that outgoing line point.
| Applicable voltage level | 6~35KV | |
| Applicable wire current | ≤600A | |
| Applicable wire diameter | 16mm²≤d≤240mm² | |
| Action response time | 0.06s≤t≤3s | |
| Action reset time | 6/12/24/36 hours optional | |
| Action count | ≥5000 times | |
| Static power consumption | ≤10μw | |
| workenvironment | temperature | -35℃~+75℃ |
| humidity | ≤95%RH(without condensation) | |
| altitude | ≤1000 meters | |
Address
No.777 Wanweng Road, Wengyang Sub-district, Yueqing City, Wenzhou City, Zhejiang Province, China
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