SQZ3 Phase failure and phase sequence monitoring relay L1,L2,L3=400VAC 2CSM111310R1331

Phase Monitoring and Installation Protection

This is a monitoring relay that checks the presence of all three phases (L1, L2, L3) and their correct sequence in 400VAC networks. This is crucial to ensure the reliable operation of three-phase equipment and protect against damage caused by missing or incorrect phase sequence. The device signals problems using a built-in LED, making it easy to quickly identify faults.

Functionality and Application

The SQZ3 relay from the pro M compact series is designed to monitor the parameters of the power supply network. Its main task is to detect phase failures and incorrect phase sequence. This protects connected devices – especially motors – from damage resulting from operation under incorrect conditions. Non-contact detection of the direction of rotation is an additional function that can be used in specific applications.

• Problem signaling with phases is done using a bright LED, allowing for quick reaction and minimizing downtime.
• Monitors all three phases (L1, L2, L3) simultaneously, providing comprehensive protection.
• Detects both phase failures and their incorrect sequence.
• Is compatible with 400VAC networks – the standard voltage in most industrial and commercial installations.
• The lack of a motor rotation direction tester means focusing on the basic function of phase monitoring, which translates into ease of use and reliable operation.

The relay signals problems using an LED indicator, and its function is also non-contact detection of the direction of rotation. The device has signaling for three phases.

This relay is a solid solution for installers and users looking for reliable protection of their electrical equipment from the effects of power supply problems. Its compact size makes it easy to mount in electrical panels, and intuitive signaling allows for quick fault diagnosis.