About Keystone
For over 50 years, Keystone has been a trusted manufacturer in the electrical power sector, known for superior craftsmanship and timely delivery due to our vertically integrated facility. We handle every step from initial concept to final delivery in-house, closely collaborating with customers to exceed expectations. Our commitment extends beyond mere products, fostering strong relationships with our community, and infusing every challenge with positive energy and passion.
Enhanced product quality
Lower operational costs
Faster turnaround times
Increased efficiency
Engineering support services
Since 1964, the Keystone team has fine-tuned its expertise in the design and production of power protection and control equipment. As part of Keystone’s services, we’ll manage your control system manufacturing process and ensure all design requirements are met – precisely and cost-effectively.
Single Point Project Management
An experienced project manager is assigned to each contract. He or she will review your specifications and work with you on selecting component part numbers, plus help you finalize all documentation. You can count on your project manager to be intimate with every detail of your project – from initial design through final delivery. Customers can monitor any phase of the project quickly and easily with a single telephone call or e-mail.
Detailed Construction and Maintenance Documentation:
- Dimensioned panel layout drawings
- Panel structural drawings
- Detailed bill of material with component part numbers
- Protection and control device specification assistance
- Test switch configuration
- Point to point wiring diagrams
- AC elementary
- DC schematics
- Control building design specifications and layout drawings
- DC battery and charger equipment
- AC and DC panelboard specification and wiring details
- As-built documentation
- Operation and maintenance manuals
Keystone also supplies detailed as-built construction documentation per customer specifications to facilitate maintenance.
Electrical manufacturing
Keystone’s expertise is building control systems for the power industry. Our team works hand-in-hand with you to manufacture a turnkey system based on your specifications. We apply our depth of experience, detailed workmanship, and sophisticated manufacturing tools to serve the unique needs of each customer. With a vertically integrated facility that includes sheet metal fabrication, assembly, wiring, and testing, we custom-manufacture systems to meet even the most exacting standards.
Quality assurance and testing
Every Keystone product is rigorously tested – both in-process and prior to shipment – using our documented quality assurance program. All equipment is point-to-point continuity tested. Relay acceptance, high voltage, and functional testing procedures are conducted according to IEEE/ANSI standards.When specifications require, we functionally test per three lines and DC control schematics.
Three phase currents and potentials are injected and checked by phase angle meter. Every element in the DC control scheme is confirmed for proper operation.
Our Doble F6150e test set, Peschel 100KV Hi Pot, and custom breaker simulator are applied to critical components.
We welcome and encourage customers to visit our facility for inspections and testing.
In Process Testing
- Fabrication
- Mechanical
Hi Pot Testing
Functional Testing
- Functional Testing
- AC potential: relaying, metering
- AC current
- Sync circuit
- DC control circuits
- Interconnected and test line ups
Contact us to learn more
As the energy sector evolves, we adapt our product lines to serve key markets, striving to enhance our products and make our customers’ industries more efficient and effective. Utility markets, renewable sources, oil, gas, petrochemical, and telecommunications are all important parts of our business.
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