Eaton Cooper Power Series 35 kV 100 A Single-Phase Under-Oil Tap-Changer Switch with 90° Bolt Tabs 2237500C01

Product Specifications

Product Name/Series: Eaton Cooper Power Series 1-Phase Externally Operated Tap-Changer Switch (2237500C01)Maximum Rated System Voltage (Um): 35 kV Maximum Voltage Class (Optimized for standard utility medium-voltage overhead pole-top and padmount grid distribution transformers)

• Lightning Impulse Insulation Withstand (BIL): 150 kV Peak Full Wave Crest Parameters.
• AC Power Frequency 1-Minute Withstand Voltage: 50 kV rms Symmetrical Baseline.
• Standard Compliance: Fully certified and tested in strict accordance with ANSI / IEEE Std C57.12.00™-1987 standard requirements.

Continuous Base Current Capacity: Rated for 100 A rms continuous current carrying loops under under-oil running conditions.Stationary Contact Configuration: Integrated high-conductivity copper Bolt Tabs – Bent 90° (Designed to seamlessly accept standard 1/4 inch terminal hardware for transformer lead connection).Mechanical Tank Mounting Dimension: Requires a standard keyed 1.33 inch (34 mm) diameter tank wall opening layout. 

Symmetrical Array & Voltage Configuration Matrix

The Eaton Cooper Power series 2237500C01 single-phase infrastructure is a specialized, compact component built for direct line-crew voltage adjustment operations:

• Single-Phase Component Design (1-Phase Layout): Engineered as a highly efficient, single-deck switch module without additional terminal posts, ideal for tight cabinet layouts and precise single-phase utility branching circuits.
• 90-Degree Bent Bolt Tabs: Features three rugged, pre-bent 90° copper tabs extending below the switch rotor base, delivering low contact resistance and stable internal wire routing under severe line vibrations.
• Handle Kit Compatibility: Universally pairs with Eaton’s 1-phase handle accessory kits including the 2237947A14H Cap/Wrench combination or the 2237947A44H Pad-lockable Metal Lever Handle (Positions A-E / 1-5).

 

Material & Structural Characteristics

• Authentic OEM Mexico Manufacturing: Factory-molded and assembled under strict North American utility guidelines to ensure zero-defect material quality and identical dimension matching for emergency grid repairs.
• High-Strength Glass-Filled Thermoplastic Injection: Switch structural body, internal contact rotor, and the threaded exterior drive neck are molded from glass-reinforced polymers resisting thermal creep and polymer tracking in hot oil environment.
• Dual High-Temperature Shaft O-Rings: Incorporates two premium, high-temperature O-ring moving seals along the central drive shaft, creating a redundant hermetic seal preventing external tank weeping.
• Non-Aging Bio-Fluid Chemical Compatibility: Material composition is proven to maintain absolute structural integrity with zero swelling when fully submersed in hot petroleum-based transformer mineral oils or plant-based Envirotemp™ FR3™ fluid.
• Anti-Rotation Keyed Neck Profile: Features a flat-milled indexing side neck that fits exactly into the 1.33″ keyed box opening, preventing rotation during intense manual switching leverage.
• Positive Contact Mechanical Indexing: Combines heavy internal contact springs and rotor layout to lock the switch definitively into position, ensuring minimal contact resistance and preventing destructive mid-position arcing.

 

Product Functions

1. Hazard-Free Winding Ratio Switching: Allows line crews to change internal transformer primary voltage taps from the outside of the tank wall, eliminating exposure to energized internal leads or flashovers.2. Permanent Subsurface Sectionalizing: Delivers robust, multi-point internal current path switching inside distribution transformer tanks, minimizing internal heat generation.3. Environmental Hermetic Tank Defense: Paired with an inner sealing gasket and an outer locknut tightened to 80-120 in-lb, it establishes an absolute, leak-proof mechanical joint against external weather. 

Key Features

1. Footprint-Reducing Single-Phase Geometry: Ultra-compact single-deck construction minimizes phase-to-ground clearances inside small pole-mount oil tanks, optimizing oil circulation space.2. Fast Tool-Free Field Replacement: Identical dimensions allowing quick dropdown replacement into failed transformers during utility maintenance outages without modifying any tank sheet-metal holes.3. Internal Tank Contamination Block: Eliminates the requirement to unseal or de-tank pole-top hardware for voltage adjustments, protecting internal paper insulation from humidity and moisture ingress.4. 100% Routine Quality Screening: Every 2237500C01 component undergoes definitive automation testing including full structural checking and insulation integrity verification for maximum utility grid field life.