Enclosure Interlocks
Enclosure interlocks are critical safety components used in industrial control panels to prevent access to energized equipment. RSP Supply carries a full line of Hoffman enclosure interlocks, including mechanical interlocks, electrical interlocks, and interlock defeaters, designed to meet safety requirements for control panels operating above 50 V AC or 60 V DC. These systems ensure enclosure doors remain locked unless the disconnecting means is switched off.
Mechanical interlocks provide automatic door locking when the enclosure is energized and engage without requiring additional actions when doors are closed. Hoffman PROLINE G2 mechanical interlocks use a ½-inch aluminum hex rod connected through door-mounted actuators and a hook-and-capture mechanism. This design prevents system re-energization unless all secondary and primary doors are properly closed, improving overall safety and compliance.
Electrical interlocks from Hoffman offer a positive internal lockout while the equipment remains energized by preventing the enclosure handle from being operated. Interlock defeaters allow authorized personnel to temporarily bypass the interlock using a tool or key for maintenance or troubleshooting while the main switch remains on. These components are designed to integrate seamlessly with Hoffman enclosures when installed according to manufacturer specifications.
More Information about Enclosure Interlocks
Hoffman Electrical Interlocks provide positive internal safety lockout on electrical enclosure while the equipment is energized. When energized, the interlocks prevent the door handle from being turned to open the door.
Hoffman Electrical Interlock Defeaters enable authorized personnel to enter an enclosure while the enclosure equipment is energized. Defeaters are key-operated, momentary contact switches with contacts normally closed. Turning the key disengages the circuit to the electrical interlock. They can be used with ll 110/120 V Hoffman electrical interlocks.
FAQs
Q: What is the purpose of an enclosure interlock?
Enclosure interlocks prevent access to energized electrical equipment by locking enclosure doors until power is disconnected, helping protect personnel from electrical hazards.
Q: What is the difference between mechanical and electrical interlocks?
Mechanical interlocks use physical components to lock doors based on disconnect position, while electrical interlocks use energized circuits to prevent door operation when equipment is powered.
Q: What is an interlock defeater?
An interlock defeater allows authorized personnel to temporarily bypass the interlock using a tool or key so the enclosure can be accessed while energized for service or maintenance.
Q: Are Hoffman interlocks compatible with PROLINE enclosures?
Yes. Hoffman PROLINE G2 mechanical interlocks are specifically designed to integrate with PROLINE enclosure systems.
Q: How can NEMA ratings be maintained when installing interlocks?
To preserve NEMA ratings, interlocks and accessories must be properly rated, installed according to specifications, and use watertight conduit hubs and bonded washers where required.
Why Buy Hoffman Enclosure Interlocks from RSP Supply
RSP Supply offers a comprehensive selection of Hoffman enclosure interlocks and safety accessories designed to support compliant and reliable industrial control panel installations. Our products help enhance personnel safety while maintaining enclosure integrity and environmental ratings. Customers rely on RSP Supply for trusted manufacturers, technical expertise, and dependable enclosure safety solutions.