MCCB 1250S Frame, 1000A-1250A, 85kA - 3 Pole | Onesto KCM1

The Onesto KCM1 1250S Frame MCCB is a heavy-duty 3 Pole moulded case circuit breaker designed for mixed load protection in large industrial electrical installations. It is suitable for electricians, panel builders, contractors and maintenance teams who need reliable high-current overcurrent and short-circuit protection on main incoming supply boards or large plant installations. Available in 1000A and 1250A current ratings.

• Application: Suitable for main incoming supply boards and large industrial plant protection
• Key specification: 85kA breaking capacity, 690V rated operating voltage
• Current range: 1000A or 1250A
• Pole configuration: 3 Pole
• Build quality: SABS approved to IEC 60947-2 / SANS 556-1, 1250S frame

Key Features

• Moulded case construction for durability in panel and enclosure installations
• Mixed load rating suitable for a wide range of circuit types
• Rated for continuous operation at 690VAC, 50/60Hz, at 40°C ambient
• High 85kA breaking capacity suited to main incoming supply fault-current levels
• Largest frame size in the KCM1 MCCB range

Typical Applications

• Main incoming supply protection
• Large industrial plant and machinery protection
• Generator and genset protection circuits
• Large commercial and industrial building main protection

Technical Specifications

What's Included

• 1 x Onesto KCM1 1250S Frame 3 Pole MCCB (as per selected current rating)

Please note: Enclosures, extension connectors, shunt trips, auxiliary contacts, under-voltage trips and vari-depth handles are not included and are available separately.

Installation & Compatibility Notes

• Confirm the required current rating before ordering.
• Confirm the breaker will be installed in a suitable enclosure rated for the 1250S frame size.
• Installation must be carried out by a suitably qualified electrician in accordance with local electrical regulations.
• Confirm incoming supply fault-level requirements before specifying, given the high current and breaking capacity involved.

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 current rating is correct for your installation, contact Zisabo with your application details and we will assist where possible.