Eaton Cooper Power Series 300A Externally Operated Non-Excited Tap-Changer Switch 2237179C02M for Substation Transformer

Product Specifications

Product Name: Oil-Immersed 300A Externally Operated Tap-Changer Switch

Rated Voltage: 35kV Max Voltage Class (150kV BIL)

Rated Current: 300A rms Continuous

Type: Externally Operated Non-Excited (Off-Circuit) Tap-Changer Switch

Color: Black Body with Bright Brass End Caps

Standard Models & Phase Configurations

• Single-Phase (1-Deck): 2237500C36 (Equipped with 1/4-20 bolts hardware)
• Two-Phase (2-Decks): 223471C16M (Side-mounted configuration)
• Three-Phase (3-Decks): 2237179C02M (Complete 3-phase synchronized assembly)

Material & Structural Characteristics

• Switch Body: Premium high-performance glass-filled polyester delivering superior dielectric insulation strength.
• Operating Shaft: High-strength, non-conductive glass-reinforced nylon shaft.
• Contacts & Terminals: Heavy-duty silver-plated copper contacts ensuring zero localized overheating.
• Sealing System: Dual high-temperature Viton/Fluorocarbon O-rings guaranteeing complete fluid-tight integrity.

Product Functions

1. Safe External Voltage Regulation: Allows the transformer’s primary coil voltage ratio to be safely adjusted from outside the tank, completely eliminating the need to open the tank cover or expose operators to internal components.

2. Fluid Contamination Prevention: Fully under-oil design prevents carbon tracking, external arcing, and dielectric contamination inside the main transformer tank during scheduled voltage adjustment.

3. Universal Distribution Adaptation: Perfectly adapts to various single-phase and three-phase distribution transformers to achieve precise, multi-position voltage shifting.

Key Features

1. High-Speed Snap Action: Engineered with a robust over-center snap-action mechanism to ensure positive contact engagement and quick, crisp position transitioning independent of handle turning speed.

2. Dead-Front Safety Design: Strictly configured for de-energized voltage regulation, completely avoiding the risk of load-break arcing and flashovers, ensuring high mechanical and electrical security.

3. Superior Environmental Sealing: Equipped with a double O-ring shaft sealing system to ensure total fluid-tight integrity and prevent oil leakage or moisture ingress in harsh outdoor environments.

4. Flexible Phase Configurations: Available in 1, 2, or 3-deck options to flexibly accommodate diverse transformer internal wiring designs and physical spacing requirements.

5. Reliable Position Locking: Features a rugged external index plate with clear markings and a pad-lockable handle option to strictly prevent unauthorized or accidental operation.

Technical Parameter Specifications

• Max. Current: 300A rms Continuous
• Max. Voltage: 35kV (BIL withstand up to 150 kV)
• Model Numbers: 2237500C36 / 223471C16M / 2237179C02M
• Primary Applications: Electric Power Industry, Pad-mounted Distribution Transformers, Substation Equipment, Off-Circuit Voltage Adjustment.
• Standard Compliance: Manufactured and tested to fully meet rigorous IEEE and IEC standard manufacturing specifications.