24kv Earthing Switch

The HUAJIDIAN 24kV Earthing Switch is an independently developed pole-mounted intelligent isolation device for 10kV overhead distribution networks. It integrates an electric operating mechanism, overall insulation protection, and efficient mechanical transmission, enabling flexible remote and local opening and closing. It plays a core role in line safety isolation, power outage maintenance protection, and intelligent power grid monitoring, and is a core supporting equipment for distribution network automation transformation.

HUAJIDIAN offers customized operating mechanisms to suit various on-site power supply solutions, including solar power and DC batteries, and is compatible with local power grid construction conditions. All production, testing, customization, and after-sales service are handled by our own factory, with a technical team providing 24/7 consultation on selection and solution customization.

Structural representation

Type introduction

Core Product Advantages

1. Strong Insulation Performance, Adaptable to Harsh Outdoor Environments

Equipped with large creepage distance composite insulators, achieving Class IV anti-pollution rating, resistant to flashover and aging, and able to withstand moisture, dust, and coastal salt spray corrosion; the separate design of insulation components and conductive circuits ensures reliable isolation between live parts and grounding components; all power frequency and lightning impulse withstand voltage indicators meet standards, suitable for both high and low altitude lines.

2. Corrosion-Resistant and Durable Conductive Circuits, Long Mechanical Life

The main conductive circuit uses a silver-plated copper process, resulting in low contact resistance, excellent conductivity, and low temperature rise during long-term operation; symmetrical contacts reduce pressure loss; key mechanical components use stainless steel + hot-dip galvanized double anti-corrosion, preventing rust and jamming; mechanical operating life ≥10,000 cycles, eliminating the risk of poor contact during long-term operation.

3. Lightweight and Modular Design, Lower Installation and Maintenance Costs

The 24kV Earthing Switch features a lightweight and modular design, allowing direct installation on standard distribution crossarms without tower modifications. Its linkage drive structure offers high transmission efficiency and smooth operation, simplifying on-site commissioning and reducing subsequent maintenance workload, significantly lowering construction and lifecycle maintenance expenses.

Main Technical Parameters

Applicable Scenarios

1. Main line segmentation and branch line isolation: quickly disconnect fault sections and minimize outage areas;

2. Remote unattended lines: remotely control maintenance and line switching, reducing manual pole climbing costs;

3. High-voltage distribution interconnection isolation in industrial parks: link with distribution network automation systems to achieve load transfer and rapid fault diagnosis;

4. Photovoltaic and wind power grid connection line isolation: reliably grounded during maintenance, ensuring the safety of new energy grid connection.

Case Study: Rural Power Grid Upgrade Project in Mountainous Areas of Central China

A county power supply bureau's intelligent upgrade of a rural power grid in a mountainous area presented challenges such as scattered lines, heavy salt spray pollution, and long maintenance distances. Traditional manual disconnect switches require electricians to climb poles for each maintenance, resulting in high risks and slow fault handling. The project procured 86 solar-powered HUAJIDIAN 24kV Earthing Switches. After two years of operation, remote operation has reduced on-site line patrols by 70%, Class IV anti-pollution insulators have eliminated flashover faults during foggy seasons, and line outage duration has decreased by 62%.

Advantages Compared to Traditional Manual Disconnect Switches

Installation and Maintenance Specifications

1. Installation Requirements

Fixed to a standard outdoor distribution crossarm; the installation site must be free from severe vibration and corrosive gases; the installation height must meet high-voltage safety distance requirements and be compatible with common pole/tower dimensions.

2. Installation and Commissioning

After completion, check the opening and closing actions, mechanical indicators, and remote control signals to ensure the switch operates smoothly without jamming.

3. Daily Maintenance

Regularly clean insulator dirt, check for rust on transmission components, confirm the sealing of the mechanism casing, and check the remote control power supply battery level; special inspections are required after heavy rain, typhoons, and salt spray weather, and insulators must be cleaned promptly.

Optional Configurations and Customization Services

1. Current Specification Customization: 400A~1250A optional, high-altitude and low-temperature enhanced versions available;

2. Optional Automation Communication Interface: Connects to SCADA systems to upload opening/closing positions and equipment fault alarm data;

3. Power Supply Solution Customization: Choose between solar power and DC battery power supply without external mains power;

4. Multiple electric operating mechanism models available, compatible with different remote control communication protocols.

FAQ

Q1: Can this 24kV Earthing Switch be used stably in coastal areas with heavy salt spray and high altitudes?

A1: Yes. The equipment comes standard with Class IV large creepage distance composite insulators, which can withstand salt spray, dust, and humid coastal environments; all metal moving parts use stainless steel + hot-dip galvanizing double anti-corrosion technology. An enhanced insulation version can be customized for high-altitude areas to meet high-altitude withstand voltage correction requirements; all withstand voltage tests have passed type tests.

Q2: What power supply methods does the electric operating mechanism support when there is no mains power on the pole?

A2: HUAJIDIAN offers two off-grid power supply solutions: independent lithium-ion DC battery power supply and solar panel power supply with charging and control module. Both solutions can operate independently of external power sources for over 18 months, fully adaptable to mountainous areas, pastoral areas, and overhead lines without power supply.

Q3: Can the equipment connect to existing distribution network SCADA systems and remotely upload fault signals?

A3: An optional secondary communication module is available, compatible with mainstream power grid communication protocols. After connecting to the SCADA platform, it can upload fault information such as opening and closing positions, mechanism jamming alarms, and low battery voltage for remote control in real time, enabling remote online monitoring of pole-mounted switches and reducing on-site inspection workload.