What is the difference between fixed and withdrawable switchgear?

2025,06,20

In the power distribution system, switchgear is an indispensable key equipment, and fixed and withdrawable switchgear are the two most common types.

As a leading electrical equipment supplier in Hubei, Hubei Jutai Electric will analyze the differences, advantages and disadvantages and applicable scenarios of these two types of switchgear for you in detail to help you make a wise choice.

Fixed switchgear refers to a distribution equipment in which all electrical components are fixedly installed in the cabinet and cannot be moved. This design has a simple structure and requires power off for maintenance. The fixed ring network cabinet produced by Hubei Jutai is a typical representative of this type of product and is widely used in urban distribution networks.

Structural features of Fixed Switchgear Cabinet

All components are permanently fixed and installed;

The structure is simple and compact;

The internal space utilization rate of the cabinet is high;

The primary circuit connection is fixed.

The withdrawable switchgear adopts a modular design. The main electrical components (especially circuit breakers) are installed on a withdrawable trolley. The components can be withdrawn from the cabinet for inspection or replacement without power failure. This design greatly improves the reliability and maintenance convenience of the system.

Structural features of withdrawable switch cabinet

Main components are installed on a movable trolley;

Equipped with guide rails and mechanical interlocking devices;

With multiple positions of working/testing/isolating;

The primary circuit is connected through connectors.

Performance and function comparison

1. Performance characteristics of fixed switch cabinet

Advantages: low cost, simple and reliable structure, small footprint;

Disadvantages: maintenance requires complete power outage, large power outage range, and long power restoration time.

2. Performance characteristics of withdrawable switch cabinet

Advantages: easy maintenance, live operation, small power outage range;

Disadvantages: high cost, complex structure, and requires larger installation space.

Fixed switchgear is applicable to:

Small distribution stations and branch lines;

Occasions with low requirements for power supply continuity;

Renovation projects with limited budgets;

Outdoor ring network power supply systems.

Drawout switchgear is applicable to:

Important load power supply systems (such as hospitals and data centers);

Places that require frequent operation and maintenance;

Power distribution systems for large industrial and mining enterprises;

Occasions where the impact of power outages needs to be minimized.

Conclusion

Fixed and withdrawable switchgear have their own characteristics. There is no absolute good or bad distinction. The key lies in matching the actual application needs.

Hubei Jutai, as a professional electrical equipment manufacturer in Hubei, can provide you with a full range of services from technical consultation, solution design to installation and maintenance, helping you choose the most suitable power distribution solution.

If you need to know more about the technical details of the Ring Main Unit or switchgear, please feel free to contact our professional team.

Author:

Mr. jiawenhan

E-mail:

JT13797437282@gmail.com

Phone/WhatsApp:

+86 13797437282