Eaton Cooper Power Series Four-Position Sectionalizing Loadbreak Switch (15kV-38kV, 200A-630A) for Loop-Feed Switchgear

Product Specifications

Product Name: Oil-Immersed Four-Position Sectionalizing Loadbreak Switch

Rated Voltage: 15kV / 15.5kV, 24.9kV / 27.8kV, 36kV / 38kV

Rated Current: 200A / 300A / 400A / 630A

Type: Four-Position Under-Oil Sectionalizing Switch

Color: White / Gray (Internal Assembly)

Standard Models & Selection

• 15kV/630A/3P Configuration: LS4RH3V12B (Horizontal Mount / V-Blade / Break-Before-Make)
• 38kV/200A/3P Configuration: LS4RV3T16M (Vertical Cover Mount / T-Blade / Make-Before-Break)

Material & Construction Detail

• Main Mechanism Body: High-strength electrical grade insulating polymer engineered for continuous hot oil immersion.
• Contacts & Blades: All-silver plated copper path ensuring ultra-low contact resistance and minimized temperature rise.
• Operating Shaft: High-torque fiberglass wound shaft with a solid pultruded core to prevent twisting.
• Sealing System: High-reliability double sealing with high-temperature Viton / Fluorocarbon O-rings.
• Arc Suppression: Custom arc suppressor paddles combined with robust phase-isolating ARC BARRIERS.

Product Functions

1. Flexible Loop-Feed Switching: Specially designed for underground residential distribution (URD) loop-feed applications and Commercial/Industrial alternate power source selection.

2. Ferroresonance Prevention: Simultaneous 3-phase switching minimizes cable capacitance and significantly eliminates the risk of catastrophic ferroresonance during operation.

3. Uninterrupted Power Supply: Available with advanced Make-Before-Break (MBB) technology to seamlessly transition between power sources without momentary power interruptions.

Key Features

1. Premium Under-Oil Protection: Fully immersed design in mineral oil or Envirotemp™ FR3™ fluid, minimizing equipment footprint and ensuring superior long-term insulation performance.

2. 360° Rotation Versatility: Features smooth 360-degree rotation in either direction with a heavy-duty external limit plate to ensure precise position locking and prevent over-rotation.

3. Quick Loadbreak Mechanism: Equipped with a robust spring-loaded activating mechanism that guarantees high-speed contact separation and positive engagement through all four positions independent of operator speed.

4. Reliable Arc Suppression: Integrated arc suppressor paddles force insulating fluid across the copper contacts to stretch, cool, and safely extinguish the arc instantly.

5. All-Silver Plated Copper Path: Features premium silver-plated moving blades and stationary contacts to deliver stable operating characteristics under high continuous load conditions.

Technical Parameter Specifications

• Max. Current: 630A Continuous Current
• Max. Voltage: 38kV Class (BIL ratings up to 170 kV)
• Fault Withstand Current: 12.5 kA symmetrical rms (IEEE) / 16 kA symmetrical rms (IEC)
• Mechanical Life: Minimum 5,000 operations (Meets rigorous IEC Class M2 Switch standards)
• Primary Applications: Electric Power Industry, Pad-mounted Transformers, Underground Loop Feed Distribution, Switchgear Cabinets.