Overview
The Eaton 2237471C01M is a 150A externally-operated three-phase tap changer switch from the Cooper Power™ series, engineered for manual voltage adjustment on distribution transformers without de-energizing or draining the tank. This hotstick-operable model eliminates worker exposure to high-voltage conductors and hot transformer fluid during maintenance, making it essential for safe field operations.
Key Features
- Three-phase operation with 150 A current rating and 35 kV voltage class
- Hotstick/T-handle operation with bolt tabs and 6 terminals
- Individual three-finger contacts for reliable electrical connection
- Non-loadbreak design ensures safe operation under proper procedures
- Keyed tank mounting (1.33 inch hole) with internal gasket sealing
- Operates in mineral oil, Envirotemp FR3, or approved transformer fluids
Technical Specifications
- Voltage Rating: 35 kV
- Current Rating: 150 A
- Phase Configuration: Three-phase
- Contact Configuration: 6 terminals with 1 three-finger contacts
- Terminal Type: Bolt tabs
- Handle Type: Hotstick/T-handle
- Impulse Withstand: 150 kV
- Mounting: Keyed sidewall mount with inside gasket
- Tank Hole Size: 1.33 inches (34 mm)
- Sealing Nut Torque: 80–120 in.-lb
Typical Applications
This tap changer switch is designed for field voltage correction on three-phase distribution transformers. Common installations include:
- Utility transformer voltage regulation and load balancing
- Rural and suburban distribution networks requiring manual tap adjustment
- Secondary voltage optimization in transformer banks
- Maintenance-safe external switching without tank opening or de-energization
Compatibility & Replacements
Compatible With
- Eaton/Cooper Power series three-phase distribution transformers
- Medium-voltage transformer applications (distribution class)
- Transformer oil and approved synthetic fluids (mineral oil, FR3)
- Standard hotstick operating procedures and tools
Replaces / Drop-In Replacement For
The 2237471C01M is a three-phase, 5-position, bolt tab configuration in the 150 A tap changer line. Related models in the same series include:
- 2237471C02M (16–14 AWG terminals)
- 2237471C03M (12–10 AWG terminals)
- 2237471C04M (8 AWG terminals)
- 2237471C51M (7-position, 8 terminals)
For single-phase equivalents, see the 2237470C series. For 250 kV impulse rating, reference 2237473C01M.
Works With
- Hotstick handles and standard handle hardware kits
- Lettered index plates (standard 5-position A–E configuration)
- Numbered index plate kits (optional)
- All Cooper Power series transformer control accessories
