Etipo SSQ 440 Changeover Switch 40A 4P I-0-II, Modular DIN Rail Mount

The Etipo SSQ 440 is a high-quality 4-pole modular changeover switch engineered for seamless I-0-II switching between two power sources, such as the main electrical grid and a backup generator. Designed for three-phase systems, this device ensures reliable manual control over power distribution in both residential and industrial environments. Its compact modular design allows for efficient installation directly onto standard DIN rails within electrical distribution boards.

Advantages

This changeover switch offers a robust and dependable mechanism for manual power source selection, effectively preventing the simultaneous connection of two power supplies. Its modular construction facilitates easy integration into existing electrical panels, saving space and simplifying the wiring process. The device is built to handle significant electrical loads, providing a safe and durable solution for maintaining power continuity during grid outages.

Suitable for

• Switching between mains power and backup generator supply
• Residential electrical installations requiring emergency power backup
• Industrial and commercial power distribution systems
• Manual control of three-phase electrical circuits

When it may not be suitable

This device is not intended for automatic transfer switching; it requires manual operation to change the power source. It is also not suitable for applications exceeding its 40A current rating or for environments requiring specialized protection against extreme environmental conditions without a proper enclosure.

Key specifications

• Number of poles: 4
• Rated current: 40A
• Switching positions: I-0-II
• Mounting type: DIN rail
• Phase compatibility: Three-phase

How to use

The switch should be installed by a qualified electrician within a suitable distribution board. Once mounted on the DIN rail, the input terminals are connected to the primary and secondary power sources, while the output terminals are connected to the load. The front-facing toggle allows the user to manually select between position I (mains), 0 (off), and II (generator), ensuring a clear physical break between sources.

What to consider before purchase

• Verify that the 40A rating is sufficient for your total load requirements
• Ensure the distribution board has enough space for a 4-pole modular device
• Confirm that the installation environment meets the requirements for DIN rail equipment

Usage recommendations

Always ensure the switch is in the 0 (off) position before attempting to change power sources to prevent electrical arcing. Regular inspection of terminal connections is recommended to maintain optimal performance and safety.