Eaton Cooper Power Series Two-Position Sidewall and Cover Mounted Loadbreak Switch (15kV-38kV, 300A-550A) for Oil Transformer

Product Specifications

Product Name: Oil-Immersed Two-Position Sidewall and Cover Mounted Loadbreak Switch

Rated Voltage: 15.5kV, 27.6kV, 38kV, 46kV

Rated Current: 550A (at 15.5kV) / 420A (at 27.6kV) / 300A (at 38kV)

Type: Two-Position Under-Oil Loadbreak/Loadmake Switch

Color: White / Gray (Internal Assembly)

Standard Models & Selection

• 15kV/550A/3P Configuration: LS2R515H3N1A (Horizontal Mount / Ring Mount / Plated Steel)
• 38kV/300A/3P Configuration: LS2W338F3S1B (Vertical Mount / Weld-In Mount / Stainless Steel)

Material & Construction Detail

• Main Mechanism Body: High-strength electrical grade insulating polymer and vented rotor halves designed for hot oil environments.
• Contacts & Blades: Silver-plated copper blades gaged to predetermined spring pressure for uniform, low-resistance contact.
• Operating Shaft: High-reliability double O-ring shaft sealing system with a high-strength non-corrosive core.
• External Hardware: Standard plated steel, aluminum, and brass (Premium stainless steel hardware optional for vaults).
• Mounting Base: Heavy-duty Ring-Mount insert or Weld-In bracket system for fast, flexible installation.

Product Functions

1. Operator-Independent Speed: Employs a manually charged over-toggle stored spring assembly, ensuring high-speed loadbreak or loadmake operation in less than one cycle, completely independent of operator handle speed.

2. Accurate Two-Position Control: Built-in mechanical internal stops strictly restrict the handle orientation to only two explicit positions (ON/OFF), preventing any catastrophic field over-rotation errors.

3. Uniform Contact Pressure: Switch contacts are factory assembled and gaged to a precise spring pressure, ensuring minimal contact resistance and zero hot spots over its entire operational lifespan.

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 dielectric insulation.

2. Dual Mounting Flexibility: Supports two field-proven mounting systems: the traditional Ring Mount System for fast bolt-free installation, or the heavy-duty Weld-In Bracket Assembly.

3. Advanced Safety & Operation: Fully hotstick operable with minimal input torque required, keeping field linemen and operators at a safe distance during live switching procedures.

4. All-Silver Plated Copper Path: Features silver-plated moving blades securely keyed between rotor halves, guaranteeing perfect alignment with stationary contacts during rigorous switching actions.

5. Corrosion-Resistant Option: Stainless steel style switches are available for vertical cover-mounted or below-grade vault applications, featuring all external parts crafted from premium stainless steel and brass.

Technical Parameter Specifications

• Max. Current: 550A Continuous Current
• Max. Voltage: 46kV Class (BIL ratings up to 200 kV to ground)
• Fault Withstand Current: 12 kA Symmetrical rms (10 Cycle / 1 Second withstand)
• Mechanical Life: Minimum 2,000 operations without requiring any maintenance
• Primary Applications: Electric Power Industry, Class 1 Pad-mounted Transformers, Underground Vaults, Distribution Switchgear Cabinets.