SH-8PT Low-Voltage Switch Cabinet
The SH-8PT low-voltage switch cabinet is manufactured by LYE Technology at our own works in Wenzhou, China, for feeder distribution and motor control duties. It puts circuit-breaker, fixed, withdrawable and plug-in designs on one 2.5 mm galvanised steel frame, with a 375 kA peak withstand rating and type tests for internal arc fault and magnitude-8 seismic load.
- Rated insulation voltage: 1000 V AC
- Rated operating voltage: 690 V AC
- Short-time withstand current: 100 kA for 1 s
- Rated peak withstand current: 375 kA
- Degree of protection: IP30 / IP31 / IP40 / IP41 / IP42 / IP54
Low-Voltage Switch Cabinet: Key Features & Typical Use
Four Switching Technologies on One Frame
The SH-8PT is built around circuit-breaker technology and supports fixed installation, withdrawable and plug-in functional units in the same enclosure family. That means one switchroom can mix a heavy incoming breaker, fixed feeder modules and plug-in outgoing units without buying three unrelated cabinet designs or re-training the maintenance team on each one.Type-Tested for Arc Fault and Seismic Load
The cabinet has been certified for internal arc-fault testing and magnitude-8 seismic testing, which is what matters in regions where the switchroom has to keep working after an earthquake or a fault. The pressure-release channel built into the cabinet top is a deliberate part of that protection: it directs hot gas away from anyone standing in front of the doors.Flexible Horizontal Busbar System
Horizontal busbars are arranged above the switchgear and rated up to 7400 A on Class 3 and Class 4 systems. Because the system is modular, a line can be extended or re-rated later by adding cubicles rather than replacing the run, and incoming cable can be terminated from above or below with outgoing cables connected at the front or the back of the cubicle.Safe Access and Fast Maintenance
Doors open to 180° on a single cubicle and more than 140° when cubicles are coupled, with an anti-sag device and a spring-loaded swing handle lock so a door cannot be knocked open by accident. Compartments can be divided to IEC 60439-1 forms 1 to 4, and cubicles can be installed against a wall or back-to-back to suit the room.Low-Voltage Switch Cabinet Specifications & Technical Data
| Parameter | Details |
|---|---|
| Product | SH-8PT low-voltage switchgear cabinet |
| Frame material | 2.5 mm galvanised plate and aluminium-zinc coated plate, screwed, bolted or welded |
| Frame column | 85 mm wide, 25 mm module mounting holes |
| Rated insulation voltage | 1000 V AC |
| Rated operating voltage | 690 V AC |
| Rated impulse withstand voltage | 8 kV |
| Rated short-time withstand current | 100 kA (1 s) |
| Rated peak withstand current | 375 kA |
| Overvoltage category | III |
| Main busbar rated current | Up to 7400 A |
| Horizontal busbar classes | Class 3 and Class 4 |
| Degree of protection | IP30 / IP31 / IP40 / IP41 / IP42 / IP54 |
| Functional unit type | Fixed type, withdrawable type, plug-in type |
| Compartment separation | IEC 60439-1 forms 1 to 4 |
| Components | Siemens and other qualified switchgear brands |
| Installation | Single-sided or back-to-back; top or bottom cable entry |
SH-8PT — the Type-Tested Low-Voltage Switchgear Cabinet Behind Heavy Feeder Loads
A switchroom is judged on what happens during its worst minute, not its average day. The SH-8PT is rated 1000 V insulation and 690 V operating voltage, with a 375 kA peak withstand current, and it has been proven against internal arc faults and magnitude-8 seismic events rather than only against a nameplate figure.In project documents this equipment appears as an LV switchgear cabinet, a low-voltage distribution board or an LV panel board, and the SH-8PT is quoted against all three descriptions. Manufacturers differ mainly in frame rigidity, busbar class and how compartments are divided, so when you compare suppliers ask for the short-time withstand current, the separation form and the type-test certificates rather than the enclosure dimensions.The 2.5 mm galvanised frame is assembled with screws, bolts or a bolted-and-welded hybrid, so the same cabinet can be delivered for a fast on-site build or a rigid welded shell. The 25 mm module mounting holes and 85 mm columns mean functional units, busbar systems and cable compartments line up across the whole run instead of only inside one cubicle.Typical duties are the ones the series was sized for: low-voltage distribution centres in power plants and substations, motor control centres in mining and heavy industry, capacitor compensation banks, and terminal distribution inside large commercial and infrastructure buildings. As the manufacturer, LYE supplies the SH-8PT with factory-direct pricing, project-specific busbar and separation arrangements, and OEM shell colouring and marking on request.Factory-Direct Low-Voltage Switch Cabinet Manufacturer & OEM / ODM
We Manufacture, You Brand
LYE Technology (Zhejiang) Co., Ltd. is a national high-tech enterprise and manufacturer in Wenzhou, China: sheet-metal fabrication, welding, powder coating, busbar machining and final assembly run on our own factory lines, and every unit is function-tested before it leaves the works. A SH-8PT Low-Voltage Switch Cabinet that reaches your site carries the routine test behind it, not just the rating on the nameplate.We are one of the Top 10 Brands of China's small power distribution boxes and a drafter of national standards in this category, and we hold ISO9001, ISO14001, ISO45001, CCC, CE and TUV certification. Because we are the manufacturer rather than a trading company, our sales engineers quote from your drawing in factory-direct terms, and OEM or ODM work is produced on the same lines as our standard products.For the SH-8PT we can also supply the frame in a bolted or welded variant and match the compartment form to the maintenance routine your operators already follow.- OEM branding — custom colours, laser marking and your own project or retail packaging, applied at the factory.
- ODM options — ratings, configurations and internal layouts built around your drawings or single-line diagram.
- Certification — ISO9001, ISO14001, ISO45001, CCC, CE and TUV, with test documents supplied per project.
- MOQ — flexible quantities for a project or a trial order, with mixed types welcome in one shipment.
SH-8PT frame assembly with 25 mm module mounting holes
Horizontal busbar system arranged above the functional units
Low-Voltage Switch Cabinet Buying Guide from the Manufacturer
Ordering an SH-8PT is a short conversation if you already have the load list. The checklist below mirrors what our sales engineers confirm with you anyway.
- Confirm the duty: incoming distribution, motor control, compensation or terminal distribution.
- Fix the electrical parameters: 1000 V insulation, 690 V operating, 100 kA for 1 s, 375 kA peak.
- Choose the functional unit type — fixed, withdrawable or plug-in — and the compartment form from 1 to 4.
- Confirm the busbar class and rating, and whether cable entry is from the top or the bottom.
- Send the single-line diagram, cubicle schedule, quantity and any required shell colour.
- Approve shop drawings before production, then routine-test each cubicle and issue test documents.
Manufacturer & Sales Support for Wholesale Buyers
OEM / ODM
Learn more →Factory colours · Logo marking · Custom layout
Wholesale
Learn more →Factory pricing · Flexible MOQ · Global shipping
Distributor Support
Learn more →Account manager · Drawing support · Priority lead times
Ready to Specify the SH-8PT Cabinet?
OEM/ODM, wholesale pricing and distributor support straight from the manufacturer — one enquiry gets you a factory-direct quotation for the SH-8PT Low-Voltage Switch Cabinet, sized to your single-line diagram, cubicle schedule and required shell colour, with type-test documentation under IEC 60439-1, IEC 60529 and IEC 60947. Our sales team replies with a specification and an indicative price, so send your drawings and quantity.Contact Our Sales TeamLow-Voltage Switch Cabinet — Frequently Asked Questions
What is a low-voltage switch cabinet?
A low-voltage switch cabinet is the enclosure where an incoming low-voltage supply is split, protected and metered before it feeds the rest of a plant or building. It houses circuit breakers, busbars, metering and control devices, and is rated for the fault level the installation presents. The SH-8PT is built for 1000 V AC insulation and 690 V AC operating voltage with a 375 kA peak withstand current.What is the SH-8PT low-voltage switch cabinet used for?
It is used as a power distribution centre, a motor control centre, capacitor compensation equipment and terminal distribution. Typical installations are power plants and substations, industrial and mining enterprises, water treatment works, civil building infrastructure, ports and airports, wherever an incoming supply has to be split and protected and maintained without shutting the whole switchroom down.What is the difference between fixed, withdrawable and plug-in switchgear?
Fixed functional units are bolted in place, so a fault means isolating the cubicle before repair. Withdrawable units sit on a truck that can be racked out and replaced while the busbar stays energised, which is what shortens an outage. Plug-in units sit between the two: easier to exchange than a fixed unit, less mechanically complex than a truck, and the SH-8PT supports all three forms.Who are the main low-voltage switch cabinet manufacturers?
The market is served by a small number of international brands and a larger group of Chinese manufacturers who build to the same IEC standards. When comparing suppliers, look at whether the frames, busbars and powder coating are produced in house, whether type tests cover arc fault and seismic performance, and which certification the factory holds. LYE manufactures the SH-8PT in Wenzhou and holds ISO9001, ISO14001, ISO45001, CCC, CE and TUV certification.How much does a low-voltage switch cabinet cost?
Indicative factory-direct pricing for a low-voltage switch cabinet of this class is roughly US$1,500 to US$6,000 per cubicle, depending on the busbar rating, the functional unit type, the degree of protection and the quantity ordered. A single trial cubicle and a multi-cubicle switchboard are quoted differently because tooling and testing effort are spread over fewer or more units, so send the single-line diagram for a specific figure.
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Use a distribution box for final circuits and compact branch protection; use a cabinet when the project needs larger incoming capacity, more feeder groups, metering, busbars or greater internal separation. The final choice should be checked against the single-line diagram, device list, available installation space and local project rules.
Provide the device schedule, circuit quantity, component dimensions, cable-entry direction, mounting method and required spare capacity. LYE also reviews door clearance, bending radius, heat-producing devices and the usable depth behind the mounting plate before confirming an enclosure size.
Start with the actual exposure to dust, rain, cleaning water and accidental contact rather than choosing the highest number by default. Cable entries, ventilation, door seals and installation workmanship affect the finished assembly, so the target rating and verification basis must be confirmed for the specific product and project.
Coated or galvanized steel is commonly considered for general indoor service, stainless steel for humid or corrosive locations, and engineering plastic for lightweight non-metallic applications. Material grade, thickness, UV exposure, chemical contact and earthing requirements must be confirmed against the installation environment.
Share the component heat load, ambient temperature, solar exposure, duty cycle and allowable internal temperature. LYE can then review enclosure volume, spacing, ventilation or fan provisions, sun shields, heaters or drainage details; the final thermal design remains tied to the installed equipment and site conditions.
Yes. A dimensioned drawing is preferred, but a physical sample and clear reference photographs can also start the review. Material, thickness, openings, hardware, finish, labels, inspection points and packing are recorded before sampling or repeat production.
PDF and common 2D CAD drawings are suitable for most enclosure enquiries, while 3D files can help with complex assemblies. Include a revision number, units, tolerances and component references; file compatibility and any missing production information will be confirmed during review.
A sample or first article can be arranged for a new or customized product. The approval plan should identify dimensions, openings, fit, appearance, hardware, labels and packaging, together with the sample cost and timing agreed for the actual order.
Available documents may include approved drawings, packing lists, dimensional or appearance inspection records, product data and certificates applicable to the confirmed model. Destination-specific declarations or third-party testing must be requested before order placement so availability and scope can be verified.
Lead time is confirmed after the product scope, quantity, sample requirement and finish are known. Packing is reviewed against product weight, surface protection, destination and shipping method; if an issue is found after delivery, send the order reference, label, photographs and quantity affected so it can be traced and reviewed.
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