Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
ABB vm750h mechanical interlock unit
ABB VM750H mechanical interlock unit designed for ABB AF400 to AF1250 block contactors, providing safe mechanical interlocking for industrial motor control and switching systems.
£37.06
Why Choose the ABB VM750H Mechanical Interlock Unit?
The ABB VM750H (1SFN035700R1000) is a genuine mechanical interlock unit designed to provide safe mechanical interlocking between two horizontally mounted ABB power contactors. As part of ABB's premium range of contactor accessories, it prevents both contactors from closing simultaneously, making it an essential safety component for reversing starters, changeover systems and other industrial motor control applications.
Engineered to ABB's exacting quality standards, the VM750H delivers reliable mechanical operation without requiring an electrical interlock. Its robust construction and precision design ensure dependable performance in demanding industrial environments while simplifying the design of safe motor control circuits.
Designed specifically for ABB AF400 to AF1250 contactors, the VM750H enables safe horizontal mounting of two AC or DC operated contactors with the same or different ratings according to ABB application guidelines.
Key Advantages
- Genuine ABB mechanical interlock unit.
- Prevents simultaneous operation of two contactors.
- Designed for ABB AF400 to AF1250 contactors.
- Suitable for horizontally mounted contactor arrangements.
- Improves operational safety in reversing and changeover circuits.
- Robust construction for long-term industrial reliability.
Key Features
- ABB VM mechanical interlock series.
- Model VM750H.
- Mechanical interlocking accessory.
- Horizontal mounting configuration.
- Compatible with AC and DC operated contactors.
- Suitable for contactors of identical or different ratings.
- Precision engineered ABB accessory.
- Quick installation onto compatible AF series contactors.
Safe Mechanical Interlocking for Industrial Motor Control
Mechanical interlock units provide a reliable method of preventing two contactors from closing simultaneously. They are commonly used in reversing motor starters, transfer systems and other applications where mutually exclusive contactor operation is essential for equipment protection and operator safety.
The ABB VM750H has been specifically designed for larger AF series contactors, providing precise operation, dependable mechanical performance and long service life in demanding industrial installations.
Typical Applications
- Reversing motor starters.
- Motor control centres (MCCs).
- Automatic transfer and changeover systems.
- Industrial switchboards.
- OEM machinery.
- Industrial automation and process control systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Terminal Type | Screw | |
|---|---|---|
| Device Type | Accessory | |
| Series | VM Mechanical Interlock Units | |
| Part number | 1SFN035700R1000 | |
| Product type | Mechanical interlock unit | |
| Accessory type | Contactor interlock mechanism | |
| Mounting orientation | Horizontal | |
| Compatible contactors | AF400, AF460, AF580, AF750, AF1250 | |
| Suitable product class | Block contactors | |
| Terminal type | Screw terminals | |
| Dimensions (W × H × D) | approx. 123.8 × 70 × 52 mm | |
| Weight | approx. 0.2 kg | |
| EAN | 7320500222102 | |
| Standards | CE, UKCA, cULus compliant |
Frequently Asked Questions
What is the ABB VM750H used for?
The VM750H mechanically interlocks two compatible ABB contactors, preventing them from closing at the same time.
Which contactors is the VM750H compatible with?
It is designed for horizontally mounted ABB AF400 to AF1250 contactors.
Can it be used with AC and DC contactors?
Yes. The VM750H is suitable for both AC and DC operated ABB contactors.
Why is a mechanical interlock important?
A mechanical interlock prevents simultaneous contactor operation, improving safety and protecting motors and electrical equipment in reversing and changeover applications.
Is this a genuine ABB accessory?
Yes. The VM750H (1SFN035700R1000) is an original ABB mechanical interlock unit designed specifically for compatible AF series contactors.
Trusted by Electrical Professionals Worldwide
ABB mechanical interlock units are trusted by panel builders, automation engineers and industrial maintenance professionals for delivering safe, reliable operation and dependable performance in industrial motor control applications.
