Eaton Cooper Power Series LBI225 & LBI225L Loadbreak Bushing Insert 200A 25kV with Latch Indicator Ring for Pad-Mounted Transformer

Product Specifications

Product Name/Series: Eaton Cooper Power Series 200A 25kV Loadbreak Bushing Insert (LBI225 & LBI225L Series)

Maximum Rated System Voltage (Um): 25 kV Class (Perfectly optimized for standard 25 kV Class systems rated up to 26.3 kV Phase-to-Phase and 15.2 kV Phase-to-Ground distribution grids)

• Lightning Impulse Insulation Withstand (BIL): 125 kV Full Wave Crest Parameters.
• AC Power Frequency 1-Minute Withstand Voltage: 40 kV rms Symmetrical Baseline.
• DC 15-Minute Withstand Voltage: 78 kV Symmetrical Baseline.
• Minimum Corona Voltage Level: 19 kV with strict zero-discharge verification.

Continuous Base Current Capacity: Rated for 200 A rms continuous current carrying loops utilizing a patented design with an all-copper current path.

Switching & Fault Closure Ratings: Certified for 10 loadbreak switching operations at 200 A rms under 26.3 kV, with an advanced fault closure capability of 10,000 A rms symmetrical at 26.3 kV for 0.17 seconds after switching cycles.

Short Circuit Fault Current Withstand: Validated up to 10,000 A rms Symmetrical for 0.17 seconds and 3,500 A rms Symmetrical for 3.0 full seconds duration.

Dimensional Array & Enclosure Spacing Matrix

The Eaton Cooper Power series 200A loadbreak bushing insert infrastructure is structured across dual physical configurations to accommodate varying workspace layout requirements:

• Standard Length Layouts (LBI225): Featuring a compact 7.11-inch (180.5 mm) total length profile, perfectly calibrated for standard domestic and import single-phase or three-phase underground industrial networks where cabinet depth is fixed.
• Extended Clearance Long Layouts (LBI225L): Upgraded to an extended 9.94-inch (252.5 mm) total length profile, providing an additional 3.0 inches of mechanical clearance from the equipment faceplate to alleviate severe cable congestion and facilitate easy tool switching.
• Torque-Controlled Installation Hardware: Engineered with an internal 5/16-inch hex broach that interfaces seamlessly with the specialized LBITOOL torque accessory to enforce positive, non-destructive tightening into the bushing well stud.

Material & Structural Characteristics

• High Quality Peroxide-Cured EPDM Insulation: Formulated, mixed, and molded entirely in-house to create a uniform, high-density insulation body that delivers exceptional dielectric strength and environmental tracking resistance.
• Bright Yellow Molded-In Latch Indicator Ring: Located on the circumference of the bushing collar to provide immediate, definitive visual feedback ensuring a fully latched, watertight loadbreak elbow installation.
• Fault-Activated Copper Knurled Piston: Advanced internal piston hardware forced forward by gas pressure generated during a fault close operation to immediately engage the elbow probe and lock into place.
• Arc-Ablative Plastic Arc Snuffer Assembly: High-performance interior contact tube material that produces arc-extinguishing gas during loadbreak switching operations to systematically suppress electrical fields.
• Pre-Molded Semi-Conductive Shield & Earthing Tabs: Features a protective deadfront outer skin meeting IEEE Std 592-2007 standard, complete with three integrated drain wire tabs for fast attachment of low-impedance copper drain lines.
• Threaded Base Copper Connection Interface: Heavy-gauge 3/8″-16 UNC copper threads provide low contact resistance and eliminate thermal drift when locked onto the apparatus bushing well stud.

Product Functions

1. Deadfront Submersible High-Voltage Connection: When mated with a comparably rated component, it provides a 100% fully shielded, fully submersible, and dust-tight link that operates safely even under direct fluid exposure.

2. Loadbreak Switching & Fault Suppression: Acts as an active circuit-interrupting component capable of completing loadmake and loadbreak operations under energized grid conditions without damaging the transformer winding leads.

3. Cabinet Clearance Balancing: Enables optimization of enclosure spacing; the extended version allows operators to shift heavy-gauge primary cables away from secondary control wires to prevent physical binding during switching.

Key Features

1. Vented J-Ring Vacuum Relief: Utilizes a specialized vented collar structure that allows for partial vacuum relief upon elbow extraction operations, minimizing physical pull-off force for field technicians.

2. Intermateable Universal Interface Compliance: Fully complies with the latest revision of the IEEE Std 386 standard for separable insulated connector systems, ensuring complete cross-brand interchangeability.

3. Non-Aging Bio-Fluid Chemical Compatibility: Formulated using premium polymers proven to maintain total structural stability and zero swelling when fully submerged in hot transformer mineral oil or bio-based Envirotemp FR3 fluids.

4. 100% Factory Partial Discharge Certification: Every production unit undergoes definitive quality screening including thorough physical inspection, periodic dissection, and non-destructive automated fluoroscopic X-ray analysis.