The Katko 63A Manual Changeover Switch is a heavy-duty rotary switch designed for safely selecting between two AC power sources, such as mains electricity and a generator or inverter.

It uses a clear I-0-II switching arrangement, giving you Source I, OFF, and Source II positions. Katko’s 63A changeover range is built for reliable power-source switching and is tested to IEC 60947-3 standards.

⚡ Key Features

• 🔌 Rated Current: 63A
• 🔄 Manual changeover operation
• ⚙️ 3 positions: I – 0 – II
• 🛡️ Heavy-duty load-break switch design
• 🔋 Suitable for inverter backup systems
• ⛽ Suitable for generator changeover
• ☀️ Suitable for solar inverter AC systems
• 🏠 Ideal for residential backup power
• 🏢 Suitable for commercial installations
• 🔒 Padlockable design on compatible enclosed versions
• 🌞 Good UV resistance
• 🧪 Resistant to many chemicals
• 🔥 Self-extinguishing enclosure material
• ✅ Tested to IEC 60947-3

🔄 How It Works

The rotary selector lets you manually choose which supply powers the connected load:

• ⚡ Position I: Primary power source
• ⭕ Position 0: OFF / load isolated
• 🔋 Position II: Backup power source

The OFF position provides a clear break between the two supplies before changing over.

🏠 Suitable Applications

• 🏡 Home backup systems
• 🔋 Inverter installations
• ⛽ Generator backup systems
• ☀️ Solar inverter AC systems
• 🏪 Shops
• 🏢 Offices
• 🌾 Farms
• 🧰 Workshops
• 🏭 Light commercial installations

🛡️ Durable Enclosed Design

Katko’s enclosed changeover switches are available in robust enclosure materials with features such as good insulating properties, UV resistance, chemical resistance and IP66 enclosure options depending on the exact model.

This makes them suitable for demanding electrical installations where durability and dependable switching are important.

✅ Benefits

• Reliable manual source switching
• Heavy-duty 63A capacity
• Clear I-0-II operation
• No electronic controller required
• Suitable for mains, inverter and generator backup
• Robust enclosure
• Easy to operate
• Suitable for residential and commercial systems
• Built to recognized IEC switching standards

⚠️ Installation Notes

• 🔧 Installation should be carried out by a qualified electrician
• ⚡ Do not exceed the switch’s rated current
• 🌍 Ensure proper system earthing
• 🛡️ Use correctly rated breakers or fuses upstream
• 🔌 Confirm both power sources are electrically compatible
• ☀️ In solar systems, use the changeover switch on the AC side of the inverter
• 🚫 Isolate both supplies before installation or maintenance
• 📏 Use correctly sized cables and terminals