Disconnect Switches

10-35kV single-pole Disconnect Switches are critical components in high-voltage power distribution systems, playing an indispensable role in medium-voltage grids with their flexible single-pole operation capability. Designed to create visible isolation points between energized and de-energized sections of the power system, these devices ensure safe maintenance operations and reliable fault isolation across diverse distribution applications.

Core Advantages

The 10-35kV single-pole disconnect switch offers five distinct core advantages that make it an essential component in modern power distribution systems:

Flexible Single-Pole Independent Operation

These switches enable phase-by-phase control of three-phase lines, facilitating targeted handling of single-phase faults or single-phase maintenance operations with high operational precision.

Reliable Isolation Performance

When opened, the single-pole disconnect switch creates a clearly visible disconnection point that fully complies with the safety isolation requirements for high-voltage power distribution, effectively preventing safety accidents caused by misoperation.

Adaptability to Complex Distribution Scenarios

Featuring a compact structure and minimal installation space requirements, they can be mounted vertically or horizontally. They flexibly coordinate with circuit breakers, fuses and other equipment, adapting to various scenarios including substations and distribution transformer stations.

Low Operation and Maintenance Costs and High Durability

Constructed with air insulation or composite insulation materials, these devices exhibit excellent outdoor weather resistance and long mechanical service life. Daily maintenance only requires regular inspection of contact conditions, resulting in minimal maintenance workload.

Enhanced Maintenance Safety

During high-voltage equipment maintenance, they completely isolate the maintenance section from energized parts. When used in conjunction with grounding switches, they provide dual safety protection for maintenance personnel, making them an indispensable safety device in high-voltage power distribution systems.

Primary Application Scenarios

Busbar Sectionalization and Line-Side Grounding Circuits in 35kV Substations

Single-pole disconnect switches enable independent opening and closing of individual phases, perfectly adapting to the phase-specific maintenance and isolation requirements in 35kV substation busbar sections and line-side grounding circuits.

Connection Points Between 10-35kV Cable and Overhead Lines

Installed at the junctions of cable and overhead lines, these switches form clear and visible disconnection points to ensure personal safety during line maintenance. They are particularly suitable for branch lines with single-side power supply.

Inlet and Outlet Terminals of Medium-Voltage Transformers and High-Voltage Switchgears

Used in conjunction with circuit breakers at the inlet and outlet terminals of medium-voltage distribution transformers and high-voltage switchgears, they provide reliable isolation when equipment is taken out of service, preventing accidental energization.

Collector Lines in Renewable Energy Power Stations

In wind farms, photovoltaic power plants and other renewable energy stations, single-pole disconnect switches allow targeted operation for single-phase faults, minimizing overall outage scope and significantly improving power supply continuity.

Branch Line Boundaries in 10kV Rural Distribution Networks

With their simple and reliable structure, these switches are ideal for installation at branch line boundaries in remote 10kV rural distribution networks, meeting fault isolation and line switching requirements in unattended scenarios.a