MCCB Mechanical Interlock, For 32A-630A Frames | Onesto KCM1

The Onesto KCM1 Mechanical Interlock is an accessory that mechanically prevents two moulded case circuit breakers from being switched on at the same time. It is commonly used in mains/generator changeover panels and dual-source electrical systems where only one supply may be connected to the load at any given moment. Available sized to match the 100S, 225S, 400S or 630S Onesto KCM1 MCCB frame ranges.

• Application: Mains/generator changeover and dual-source interlocking
• Key specification: Sized to match 100S, 225S, 400S or 630S frame MCCBs
• Compatibility: Select the interlock matching the frame size of your installed MCCBs
• Build quality: Designed for use with Onesto KCM1 moulded case circuit breakers
• Installation benefit: Prevents unsafe simultaneous closure of two breakers

Key Features

• Mechanically links two MCCBs of the same frame size so only one can be closed at a time
• Reduces the risk of backfeeding a generator or paralleling incompatible supplies
• Simple mechanical device requiring no additional control wiring
• Matched to Onesto KCM1 frame dimensions for correct fit

Typical Applications

• Generator changeover panels
• Dual-source (mains/standby) switching
• Isolator installation
• Domestic, commercial or light industrial standby power systems

Technical Specifications

What's Included

• 1 x Mechanical Interlock kit (sized to selected frame)

Please note: MCCBs are not included and must be purchased separately.

Installation & Compatibility Notes

• Confirm both MCCBs to be interlocked are the same Onesto KCM1 frame size before ordering.
• Confirm the current rating and pole configuration of the MCCBs being interlocked.
• Installation must be carried out by a suitably qualified electrician in accordance with local electrical regulations.
• Contact Zisabo if you are unsure which interlock size matches your installed breakers.

Warranty & Support

This product is supplied with the applicable manufacturer or supplier warranty, subject to correct installation, correct application, and warranty terms.

Zisabo supplies quality plumbing, pump, filtration and electrical products with practical support to help customers choose the correct item for their application. If you are unsure whether this product is suitable, contact us before ordering and our team will assist where possible.

Need help choosing? If you are unsure which interlock size is correct for your MCCBs, contact Zisabo with your breaker model details and we will assist where possible.