Withdrawable Type Switchgear
Draw-out switchgear in which the circuit breaker or functional unit can be racked between service, test, and isolated positions — engineered by HARRL for safe maintenance and reliable medium & low voltage power distribution.
What Is Withdrawable Type Switchgear?
Withdrawable type switchgear — also called draw-out or racking switchgear — is an assembly in which the main switching device (typically a vacuum circuit breaker, or a low-voltage functional unit) is mounted on a removable truck rather than bolted in place. The truck travels along guide rails between three defined positions: service (primary and secondary circuits connected), test (control circuit live, power contacts isolated), and isolated / withdrawn (fully separated with an automatic shutter covering the live busbar spouts).
This draw-out construction is the defining feature of HARRL's metal-clad medium voltage range and our type-tested low voltage assemblies. It is the preferred design wherever continuity of supply and operator safety are critical — utility primary substations, industrial plants, and renewable-energy collector stations.
Key Features & Benefits
Safer Maintenance
The circuit breaker racks out to an isolated position, creating a visible disconnect so technicians can work on a feeder without de-energizing the whole busbar.
Fast Restoration (MTTR)
A faulty breaker truck is swapped for a tested spare in minutes — no rewiring — dramatically reducing mean time to repair versus fixed-pattern designs.
Interlocked Operation
Five-prevention mechanical interlocks enforce the correct service / test / isolated sequence, blocking misoperation that causes arc-flash incidents.
Standardized & Interchangeable
Trucks of the same rating are interchangeable across panels, simplifying spares holding for fleets and multi-site grid operators.
Technical Specifications & Compliance
HARRL withdrawable switchgear is designed, type-tested, and manufactured to international standards. Medium voltage metal-clad cabinets comply with IEC 62271-200 (including internal arc classification and the LSC2B / PM partition class), and low voltage withdrawable assemblies are type-tested to IEC 61439-1/-2.
- Rated voltage: 12 kV / 24 kV / 40.5 kV (MV) and up to 690 V (LV)
- Four-compartment metal-clad segregation with pressure-relief arc venting (MV)
- Five-prevention mechanical interlocks against misoperation
- Automatic safety shutters over live busbar spouts when withdrawn
- Withdrawable VCB trucks (VS1 / ZN63A-12 class or equivalent)
- Internal arc-fault containment to IEC 62271-200 Annex A
Exact ratings vary by model — see the linked datasheets for the certified figures of each cabinet.
Applications in Medium & Low Voltage Systems
Because a withdrawable design lets operators isolate and replace a single breaker without shutting the whole board, it is specified wherever downtime is costly:
- Utility primary and secondary distribution substations
- Industrial plant intake and motor-control switchboards
- Renewable-energy collector and step-up stations (solar / wind)
- Commercial buildings, data centers, and infrastructure projects
Why Choose HARRL as Your Withdrawable Switchgear Manufacturer
HARRL is a Chinese manufacturer of high & low voltage switchgear with 20+ years of experience and exports to 50+ countries. Our withdrawable cabinets are produced on an in-house CNC sheet-metal and automated assembly line, with 100% factory acceptance testing before dispatch. Every panel ships with type- test reports, and our engineering team supports single-line design, busbar selection, and project-specific customization for international tenders.
Global Support & Supply
As a withdrawable switchgear supplier to projects across public grid, renewable, and infrastructure sectors worldwide, HARRL provides export-ready documentation, spare breaker trucks for fast field replacement, and responsive after-sales support. Tell us your voltage class, short-circuit rating, and scheme and we will return a quotation with the matched model.
HARRL Withdrawable Switchgear Models
Explore the medium and low voltage cabinets in our withdrawable range.
KYN28-12 Metal-Clad Withdrawable Switchgear (12 kV)
Air-insulated, four-compartment metal-clad cabinet for indoor 3.6–12 kV primary distribution — HARRL's most widely deployed MV model.
KYN28-24 Metal-Clad Withdrawable Switchgear (24 kV)
24 kV class metal-clad withdrawable switchgear for higher-voltage primary distribution with the same four-compartment segregation.
KYN61-40.5 Metal-Clad Withdrawable Switchgear (40.5 kV)
40.5 kV metal-clad withdrawable assembly for sub-transmission and large industrial intake substations.
MNS Withdrawable LV Switchgear
Type-tested low-voltage withdrawable assembly to IEC 61439 with draw-out functional units for distribution and motor control.
Need a withdrawable switchgear quotation?
Send us your specification — our team replies within 24 business hours.