Stop Voltage Sags from Shutting You Down
Reliable Protection for Your Critical Equipment
Unexpected voltage sags can cause costly downtime and production delays. Coil-Lock ensures your relays and contactors stay engaged, keeping your operations running smoothly.
Timeless Reliability
The Coil-Lock is not time-based, therefore it maintains operation during sag events.
Critical Power Continuity
The Coil-Lock allows critical power processes and elements to stay active, keeping relays, contactors, and motor starters engaged.
Low Voltage Resilience
The Coil-Lock will keep contacts closed and motors running with only 25% of remaining voltage.
Local Expertise
Built in Charlotte, North Carolina with local service and support.
Rapid ROI
Fast return on investment which is usually less than one year.
Over 30,000
PSQI Coil-Locks installed around the world!
Engineered to Perfection: Revolutionizing Coil-Lock Manufacturing
PQSI has been manufacturing Coil-Locks with robotic precision from day one. Each component is built with consistent accuracy, ensuring product reliability and effective commercial power conditioning solutions. The new 45,000+ square foot production facility in Charlotte consolidates operations and provides adaptable space for future growth. PQSI uses a trusted manufacturing partner who is ISO 9001, ensuring the highest standards of quality and compliance.
Driven by Precision
At PQSI, every process is engineered with exacting standards. Our commitment to precision isn’t just about meeting expectations—it’s about exceeding them. We utilize advanced robotics and industry-leading techniques to ensure each Coil-Lock component delivers superior performance and reliability.
Quality Without Compromise
Every stage of our manufacturing process reflects our dedication to quality. Leveraging state-of-the-art technology and a highly skilled team, we create products that stand up to rigorous commercial demands, ensuring dependable power conditioning solutions that you can trust.
Frequently Asked Questions
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What does a coil-lock do?
Relays, contactors, and motor starters are used extensively in commercial and industrial facilities to control business machines and process equipment. These devices often have a low tolerance to electric service voltage sags, and are diagnosed as “weak links” in automated production lines. During common voltage sags, the solenoid coils in these motor-driven systems may de-energize long enough to cause the power circuit mechanical contacts to open, and the connected electrical equipment to shutdown. This situation can disrupt business operations and impact an entire manufacturing facility. The Coil-Lock eliminates costly process downtime, installs in minutes, and can be a cost-effective alternative to other voltage sag protection methods. The Coil-Lock product is available in different models to be compatible with most relays, contactors, or solenoid coils, and is ideal for protecting master control relays, and E-stop circuits.
Do Coil-Locks Use Capacitors or Batteries?
The Coil-Lock does not utilize and battery or capacitive energy storage devices to provide its voltage sag protection capability.
What if my Coil resistance does not match the Coil Lock specification?
Measured coil resistances not within 5% of the stated resistance for each model are not supported.
How does the coil lock work? Is it acting as a rectifier: changing AC to DC?
Yes. There is a rectifier. The equations are proprietary and based on many years of research and testing.
Will a Coil Lock work in a power failure?
Coil Locks are designed to protect motors by keeping starters coils engaged during an up to 80% sag condition . They will not keep motor engaged during a power failure.
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