Switchgear Intelligent Control Device LY-9903

Product Advantages

LCD Temperature & Humidity Monitoring & Control

Equipped with a high-definition LCD screen, it displays real-time temperature and humidity data intuitively. It also supports analog control to adjust environmental parameters (0℃~99℃), effectively preventing condensation damage to switchgear components.

Dynamic Simulation Diagram & Voice Fault Prompt

The standard dynamic simulation diagram shows switchgear status (e.g., breaker on/off, test/working position) in real time. A built-in voice prompt function alerts operators to faults immediately, enhancing on-site safety.

Live Display & Blocking Function

The live display feature clearly indicates whether the switchgear is energized, while the blocking function locks invalid operations, fundamentally avoiding electric shocks or equipment damage caused by misoperations.

Remote Control & Main Circuit Parameter Measurement

It enables remote breaker opening/closing and energy storage, reducing on-site manual intervention. Additionally, it monitors and displays key parameters of the main circuit, providing data support for power grid optimization.

Human Body Sensing & Optional RS485 Interface

A built-in human body sensing probe detects approaching operators and triggers safety reminders. The optional RS485 communication interface supports centralized management, facilitating integration with industrial control systems.

Technical Parameters

Applications

Metal-clad Switchgears & Withdrawable Switchgears

Its humidity control and anti-condensation functions protect sealed metal-clad switchgears from internal component corrosion, ensuring long-term stable operation.

The remote control function simplifies the operation of withdrawable modules, reducing the time for equipment maintenance and replacement.

Fixed Switchgears & Ring Main Units (RMUs)

The dynamic simulation diagram provides clear status visualization for fixed switchgears, making daily inspection and fault troubleshooting more efficient.

Adaptable to 3~35kV ring main units in distribution networks, it enhances safety with live display and blocking, ensuring reliable power supply for residential and industrial areas.

Selection Guide

Confirm the voltage grade (3~35kV) of the target switchgear to ensure matching with the device’s design range.

Select based on cabinet type (metal-clad/withdrawable/fixed/RMU)—e.g., prioritize remote control for withdrawable cabinets.

Check if RS485 communication is required for centralized monitoring of multiple switchgears in large power grids.

Choose the human body sensing function for high-traffic areas (e.g., factory workshops) to improve on-site safety.

Verify the power supply type (AC/DC) according to on-site power conditions (e.g., DC220V for outdoor substations).

Operation Guide

Power Connection & Parameter Setting

Connect to the specified power supply (AC220V/DC110V/DC220V) and ensure correct wiring (refer to terminal labels 07~20 for common terminals and sensor connections).

Use the "Up" and "Down" keys to set temperature/humidity thresholds and alarm values; press "Confirm" to save settings.

High-voltage Test Preparation & Daily Monitoring

Before conducting high-voltage tests, disconnect the device power and unplug sensor plugs (per terminal 09~11) to avoid damage.

Check the LCD screen for real-time status: "√ Breaker Closed" (terminal 01), "√ Test Position" (terminal 03), and temperature/humidity data.

Fault Handling

If a voice alarm is triggered, refer to the dynamic simulation diagram to locate faults (e.g., "Ground Position" error for terminal 05); reset after troubleshooting.