ABB OTZW25 Changeover Conversion Kit

Core Performance & Industrial Application

The ABB 1SCA022778R6920 OTZW25 is a mechanical changeover conversion kit for OT200~OT250 switch disconnectors.

It links two isolating switches together to achieve I-O-II three-position dual power manual switching.

Built-in mechanical interlock structure prevents two power sources from closing at the same time, avoiding short-circuit risk.

It adopts sturdy metal linkage structure, stable operation and high mechanical strength for long-term frequent switching.

It is widely used in low voltage power distribution cabinets for manual dual power supply transfer and maintenance isolation.

It is a dedicated accessory for ABB OT series disconnectors, commonly used for old power panel spare replacement.

Technical Specifications

▶ Product type: Mechanical changeover conversion kit

▶ Brand: ABB

▶ Model: 1SCA022778R6920 (OTZW25)

▶ Compatible switch: OT200 ~ OT250 switch disconnector

▶ Operation position: I-O-II

▶ Function: Mechanical interlock, dual power switching

▶ Weight: 2.6 kg

▶ Mounting: Installed on two adjacent OT disconnectors

▶ Operating temperature: -25℃ ~ +70℃

▶ Protection rating: IP20 inside cabinet

▶ Feature: Anti-misoperation interlock, robust linkage mechanism

▶ Country of origin: Finland

▶ Compliance: CE certification

Industry Applications

Applied in factory distribution cabinets, water treatment and power plants for manual dual power switching system maintenance.

Note: Confirm matching switch frame size before ordering