UL 1558 Switchgear Manufacturer
Custom-engineered metal-clad switchgear for North American industrial, utility, and infrastructure projects. 1kV to 38kV, vacuum or SF6 circuit breakers, IEEE C37 compliant.
Metal-Clad Switchgear for North American Projects
RICHES POWERTECH manufactures UL 1558 metal-clad switchgear for medium-voltage power distribution in industrial, utility, renewable energy, and commercial applications across North America. Our switchgear range covers voltage classes from 1kV to 38kV, with continuous bus ratings from 600A to 4000A and short-circuit ratings up to 63kA.
Every unit is custom-engineered to match the project single-line diagram, available fault current, and protection scheme. We use vacuum or SF6 circuit breakers in drawout or fixed-mounted configurations, selected based on project voltage class and application requirements. All switchgear is designed and tested in accordance with IEEE C37 standards.
If you are specifying metal-clad switchgear for a North American project, send us your SLD or equipment schedule. Our engineering team will respond within 24 hours with a technical review and quotation.
Key Specifications
| Parameter | Specification |
|---|---|
| Standard | UL 1558 (Metal-Clad Switchgear) |
| Voltage Class | 1kV to 38kV (project-specific) |
| Frequency | 60 Hz |
| Phase | 3-phase, 3-wire or 4-wire |
| Bus Rating | 600A – 4000A continuous (project-specific) |
| Short-Circuit Rating | 25kA / 40kA / 63kA (project-specific) |
| Circuit Breaker Type | Vacuum or SF6, drawout or fixed-mounted |
| Enclosure | NEMA 1 / NEMA 3R (project-specific) |
| Internal Separation | IEEE C37.207 Type 1, 2, or 3 |
| Control Power | 120V AC or 125V DC typical |
Note: Specific ratings are determined by project requirements. Contact our engineering team with your SLD for project-specific specifications.
Circuit Breaker Configurations
Vacuum Circuit Breakers
Vacuum interrupters provide reliable switching and interruption for medium-voltage applications. Typical voltage range: 4.16kV to 15kV. Advantages include long mechanical life, low maintenance requirements, and suitability for frequent switching operations. Available in drawout or fixed-mounted configurations.
SF6 Circuit Breakers
SF6 gas-insulated breakers are used for higher voltage classes (15kV to 38kV) and applications requiring compact switchgear dimensions. SF6 breakers provide excellent arc-quenching performance and are suitable for utility and industrial applications where space is limited.
Drawout vs. Fixed-Mounted
Drawout breakers can be removed from the switchgear cell without disconnecting primary conductors, enabling faster maintenance and replacement. Fixed-mounted breakers are bolted directly to the cell structure, providing a more compact design for applications where breaker removal is infrequent.
Protection Relays
We integrate microprocessor-based protection relays for overcurrent, ground fault, differential, and distance protection. Relay panels are built to UL 508A standards and can include SCADA integration for remote monitoring and control.
Applications
Industrial Facilities
Main and unit substations, motor control feeders, and process power distribution in manufacturing plants.
Data Centers
Redundant medium-voltage distribution for Tier III and Tier IV data center architectures with selective coordination.
Utility Substations
Feeder and capacitor bank switchgear for utility distribution substations and renewable interconnection points.
Solar Farms
Medium-voltage collector switchgear for utility-scale PV systems, connecting inverters to the utility grid.
Wind Farms
Collector switchgear for wind turbine arrays, handling 34.5kV collection systems.
Commercial Buildings
Medium-voltage service entrance and distribution for large commercial complexes, hospitals, and campuses.
Oil & Gas
Switchgear for drilling rigs, refineries, and petrochemical facilities with hazardous area considerations.
Water & Wastewater
Power distribution for pump stations, treatment plants, and lift stations in municipal infrastructure.
Engineering & Customization
Our engineering workflow for every UL 1558 switchgear project:
SLD Review
We review your single-line diagram and identify voltage class, breaker types, and protection requirements.
Equipment Schedule Review
We cross-check the equipment schedule against the SLD to confirm ratings, accessories, and relay requirements.
Electrical Design
We produce detailed electrical drawings showing bus arrangements, breaker coordination, and relay logic.
Panel Layout
We design the physical layout showing cell dimensions, cable entry locations, and access requirements.
Component Selection
We select circuit breakers, relays, and instrumentation based on project specifications and availability.
Short-Circuit Evaluation
We calculate short-circuit currents and verify that all equipment ratings meet or exceed project requirements.
Submittal Package
We prepare GA drawings, electrical schematics, and specification sheets for your approval before production.
Production & Testing
After submittal approval, we fabricate the switchgear and perform factory acceptance testing.
Manufacturing Capabilities
Sheet Metal Fabrication
In-house sheet metal fabrication using CNC punching, laser cutting, and press braking. Enclosures are constructed from 11-gauge (3.0mm) cold-rolled steel with welded seams for structural rigidity. All welding is performed by certified welders.
Busbar Processing
CNC busbar processing equipment for cutting, punching, and bending copper or aluminum busbars. Busbars are electroplated or tin-plated for corrosion resistance and low-contact-resistance connections.
Assembly & Wiring
Skilled technicians assemble switchgear cells, install circuit breakers, route secondary wiring, and terminate control circuits. All wiring follows project-specific schematics and NEC requirements.
Inspection & Testing
Every switchgear assembly undergoes comprehensive factory acceptance testing (FAT) before shipment:
- Insulation resistance testing (megger)
- Contact resistance measurement on all bolted connections
- Circuit breaker timing and travel analysis
- Relay injection testing for protection verification
- Mechanical operation of all interlocks and mechanisms
- Visual inspection against approved submittal drawings
Test reports are included in the shipment documentation package. All testing is performed in-house as part of our quality control process.
Standards & Certification
UL 1558 metal-clad switchgear is designed and manufactured in accordance with the following standards:
- UL 1558 — Standard for Metal-Clad Switchgear
- IEEE C37.207 — Standard for Metal-Clad Switchgear
- IEEE C37.04 — Standard for Ratings and Related Capabilities of AC High-Voltage Circuit Breakers
- IEEE C37.09 — Standard for Test Procedures for AC High-Voltage Circuit Breakers
- NEC (NFPA 70) — National Electrical Code
- NEMA SG-5 — Power Switchgear Assemblies
Important: Our switchgear is designed to meet UL 1558 requirements. Third-party certification (UL Listing, field evaluation, or type testing) is arranged on a project-specific basis depending on the application, local authority having jurisdiction (AHJ) requirements, and customer specifications. We do not claim blanket UL Listing for all switchgear — certification scope is confirmed per project.
We also hold ISO 9001 certification for our quality management system, ensuring consistent manufacturing processes and documentation.
Why RICHES POWERTECH
Custom Project Engineering
Every switchgear is engineered to your SLD. We review drawings, calculate short-circuit currents, and verify protection coordination.
Factory-Direct Manufacturing
We manufacture in our own facility, providing direct communication, competitive pricing, and quality control.
North American Project Focus
We have shipped switchgear to North American projects since 2008. Our engineering team understands NEC, IEEE, and NEMA standards.
Flexible Component Configuration
We work with major breaker and relay manufacturers. We can accommodate project-specified brands or recommend cost-effective alternatives.
Project-Based Production
We build to order — no standard catalog products. Each switchgear is customized for your voltage class, fault current, and protection scheme.
Technical Communication
Our engineering team communicates in English, reviews your drawings, and responds to technical questions within 24 hours.
Export Support
We handle export packaging, ocean freight documentation, and coordinate with your logistics provider for on-time delivery.
Frequently Asked Questions
What is the difference between UL 1558 switchgear and UL 891 switchboard?▾
What voltage classes do you support for UL 1558 switchgear?▾
Can you review our single-line diagram before we place an order?▾
What type of circuit breakers do you use in UL 1558 switchgear?▾
Do you provide NEMA 3R outdoor switchgear?▾
What standards govern UL 1558 switchgear?▾
What is the typical lead time for UL 1558 switchgear?▾
Do you provide relay protection and control panels?▾
Request a Quote
Have an SLD, equipment schedule, or project specification? Send it to our engineering team for review. We will respond within 24 hours with a technical review and quotation.
Upload Your Documents
Send your single-line diagram (SLD) or equipment schedule for a free engineering review and quotation.