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ABB vm19 mechanical interlock unit
ABB VM19 mechanical interlock unit designed for interlocking two ABB AF116 to AF370 contactors in industrial reversing motor starter applications.
£16.87
Why Choose the ABB 1SFN030300R1000 VM19 Mechanical Interlock Unit?
The ABB 1SFN030300R1000, also known as the VM19, is a robust mechanical interlock unit designed for use with ABB AF series contactors. It provides a safe mechanical interlocking function between two contactors of the same frame size, preventing both devices from closing simultaneously and ensuring safe operation in reversing and changeover motor control circuits.
Developed for industrial automation, OEM machinery and motor control applications, the VM19 installs directly between two compatible contactors. Its compact design eliminates the need for complex external interlocking mechanisms while increasing operational safety and reliability in demanding industrial environments.
Compatible with ABB AF116 to AF370 contactors of the same frame size, the ABB 1SFN030300R1000 is the ideal accessory for reversing starters, transfer switching applications and interlocked contactor assemblies requiring dependable mechanical locking.
Key Advantages
- Provides reliable mechanical interlocking between two contactors.
- Prevents simultaneous closing of both contactors.
- Designed for ABB AF116 to AF370 contactors.
- Suitable for reversing and changeover motor starter assemblies.
- Compact design allows straightforward installation.
- Improves operational safety and system reliability.
Key Features
- ABB VM19 mechanical interlock unit.
- Part number 1SFN030300R1000.
- Mechanical interlock accessory.
- For two contactors of equal frame size.
- Compatible with AF116...AF370 contactors.
- No auxiliary contacts required for mechanical locking.
- Compact side-by-side installation.
- Robust industrial construction.
- Maintenance-free operation.
- Suitable for industrial motor control systems.
Safe Mechanical Interlocking for Industrial Contactors
Mechanical interlock units are essential for reversing starters and changeover applications where two contactors must never close simultaneously. The ABB VM19 provides a simple yet highly effective mechanical locking mechanism that physically prevents simultaneous operation, helping protect motors, power circuits and connected equipment.
Its durable construction and direct mounting arrangement allow panel builders and OEM manufacturers to create compact, reliable motor control systems while maintaining high safety standards throughout the installation.
Typical Applications
- Reversing motor starters.
- Forward and reverse motor control.
- Industrial control panels.
- Transfer and changeover systems.
- Machine building.
- OEM automation equipment.
- Industrial switchgear assemblies.
Technical Specifications
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| Device Type | Accessory | |
|---|---|---|
| Series | VM Mechanical Interlock Units | |
| 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 |
Frequently Asked Questions
What is the ABB 1SFN030300R1000 used for?
It is a mechanical interlock unit that prevents two compatible ABB contactors from closing at the same time.
Which contactors is the VM19 compatible with?
The VM19 is designed for ABB AF116 to AF370 contactors of the same frame size.
Why is a mechanical interlock required?
Mechanical interlocking prevents simultaneous operation of reversing or changeover contactors, protecting motors and electrical systems from faults.
Does the VM19 require electrical wiring?
No. The VM19 operates purely as a mechanical interlock and does not require electrical connections.
Where is the VM19 typically installed?
It is installed directly between two side-by-side compatible ABB contactors in reversing or changeover motor control assemblies.
Trusted by Industrial Automation Professionals
ABB VM mechanical interlock units are trusted by panel builders, OEM manufacturers and automation engineers for delivering safe, reliable interlocking in reversing motor starters and industrial control systems.
