ABB vm19 mechanical interlock unit

Why Choose the ABB VM19 Mechanical Interlock Unit?

The ABB VM19 (Part Number: 1SFN030300R1000) is a heavy-duty mechanical interlock unit designed for safe and reliable interlocking of two ABB AF series contactors in reversing and changeover motor control applications. Engineered for industrial automation systems, the VM19 prevents simultaneous closing of both contactors, helping protect motors, control circuits and connected equipment from electrical faults and mechanical damage.

Designed specifically for ABB AF116 to AF370 contactors, the VM19 provides a secure mechanical linkage between two contactors of equal frame size mounted side by side. Its compact industrial design simplifies reversing starter assembly while ensuring dependable long-term operation in demanding environments.

Manufactured using durable industrial-grade materials with screw terminal compatibility and precision mechanical operation, the ABB VM19 is widely used by panel builders, OEM machine manufacturers and industrial automation engineers requiring safe motor reversing functionality within industrial control systems.

Key Advantages

• Provides reliable mechanical interlocking between two contactors.
• Prevents simultaneous operation of reversing contactors.
• Compatible with ABB AF116 to AF370 contactors.
• Supports safe motor reversing and changeover applications.
• Compact side-by-side mounting configuration.
• Industrial-grade construction for long-term durability.

Key Features

• ABB VM19 mechanical interlock unit.
• Part number: 1SFN030300R1000.
• Mechanical interlock for reversing contactor assemblies.
• Suitable for side-by-side mounted contactors.
• Screw terminal compatibility.
• Designed for ABB AF and AFB contactor series.
• Secure mechanical locking mechanism.
• Industrial insulated construction.

Technical Specifications

• Manufacturer: ABB
• Series: VM Mechanical Interlock Units
• Model: VM19
• Part number: 1SFN030300R1000
• Product type: Mechanical interlock unit
• Application: Reversing and changeover contactor interlocking
• Compatible contactors: AF116..AF370, AF116B..AF370B, AX260..AX370
• Mounting type: Side-by-side contactor mounting
• Connection compatibility: Screw terminal contactors
• Construction: Industrial insulated thermoplastic and metal mechanism
• Protection function: Prevents simultaneous contactor operation
• Dimensions (W × H × D): approx. 70 × 58.7 × 31.9 mm
• Weight: approx. 0.05 kg
• Standards: EN 60947-4-1, UL 60947-4-1

Reliable Interlocking for Industrial Motor Reversing Systems

Mechanical interlock units are essential components within reversing motor starter assemblies. The ABB VM19 ensures that only one contactor can operate at a time, preventing dangerous simultaneous energisation conditions that could cause short circuits or equipment damage in motor reversing applications.

ABB motor control accessories are engineered for demanding industrial automation systems where safety, reliability and operational continuity are critical. The VM19 supports professional control panel assembly while helping ensure safe and dependable motor direction control within industrial environments.

Typical Applications

• Industrial reversing motor starters.
• Conveyor and material handling systems.
• Pump and fan direction control systems.
• Machine automation and OEM equipment.
• Industrial control panels and switchboards.
• Motor changeover and interlocking applications.

Trusted by Industrial Automation Engineers

ABB mechanical interlock accessories such as the VM19 are trusted worldwide for dependable motor reversing safety, reliable contactor integration and long-term industrial performance.