Product Description

Siemens SIRIUS Line Monitoring Relay, 3-Phase 3-Wire, 1 CO, 22.5 mm - 7UG0612-1AA21

Product Description

The Siemens 7UG0612-1AA21 is a SIRIUS line monitoring relay designed for monitoring 3-phase 3-wire AC electrical systems. This compact three-phase line monitoring relay helps supervise the incoming power supply and detect abnormal conditions such as phase failure, phase sequence reversal and phase imbalance, making it suitable for industrial electrical and automation applications. Siemens documentation for the 7UG0 range identifies these functions for three-phase line monitoring.

With a 1 changeover (1 CO) relay output, the 7UG0612-1AA21 line monitoring relay can be integrated into external contactor control, alarm and protection circuits. Its 22.5 mm compact module design helps save valuable space inside electrical control panels and automation cabinets. Product listings identify this model as a 3-pole, 3-wire line monitoring relay with 1 CO contact.

The Siemens SIRIUS 7UG0612-1AA21 is suitable for applications including motor control panels, MCC panels, industrial automation, machine control systems, pumps, fans, compressors and three-phase electrical equipment where reliable power-supply supervision is required.

Key Features

• Brand: Siemens

• Product Family: SIRIUS 7UG

• Part Number: 7UG0612-1AA21

• Product Type: Line Monitoring Relay

• Network: 3-Phase 3-Wire

• Number of Poles: 3 Pole

• Output: 1 CO

• Output Contact: 1 Changeover Contact

• Module Width: 22.5 mm

• Application: Three-Phase Line Monitoring

• Monitoring: Phase Failure

• Monitoring: Phase Sequence

• Monitoring: Phase Imbalance

• Mounting: Control Panel / DIN Rail

• Product Series: Siemens SIRIUS 7UG

Applications

The Siemens 7UG0612-1AA21 line monitoring relay is suitable for:

• Three-phase power supply monitoring

• Phase failure monitoring

• Phase sequence monitoring

• Phase imbalance monitoring

• Motor control panels

• MCC panels

• Industrial automation

• Machine control cabinets

• Pump control systems

• Fan control systems

• Compressor applications

• Industrial machinery

• Factory automation

• Electrical distribution panels

• Motor starter systems

• Three-phase equipment monitoring

• Electrical protection circuits

• Alarm and control systems

Benefits

• Reliable three-phase line monitoring

• Designed for 3-phase 3-wire systems

• Phase failure detection

• Phase sequence monitoring

• Phase imbalance supervision

• 1 changeover relay output

• Compact 22.5 mm module

• Space-saving control-panel installation

• Suitable for motor-control applications

• Easy integration with external control circuits

• Suitable for industrial automation

• Useful for electrical equipment protection

• Supports reliable power-supply supervision

• Suitable for machine control systems

• Compact Siemens SIRIUS monitoring solution

• Suitable for industrial electrical panels

Frequently Asked Questions

Q1. What is Siemens 7UG0612-1AA21?
The 7UG0612-1AA21 is a Siemens SIRIUS line monitoring relay designed for monitoring three-phase, three-wire AC electrical systems.

Q2. Which electrical system does it support?
This model is designed for 3-phase 3-wire (3P 3W) applications. Siemens documentation identifies line monitoring functions for 3-phase 3-wire networks.

Q3. How many output contacts does it have?
The relay provides 1 changeover contact (1 CO).

Q4. What faults can a line monitoring relay detect?
The applicable 7UG0 line-monitoring functions include phase failure, phase sequence reversal and phase imbalance.

Q5. What is the module width of 7UG0612-1AA21?
The product is specified with a compact 22.5 mm module width.

Q6. Can it be used for motor control?
Yes. It can be integrated into suitable motor control and protection circuits to supervise the incoming three-phase supply.

Q7. Can the relay monitor phase sequence?
Yes. Phase sequence monitoring is one of the line-monitoring functions associated with this 7UG0 range.

Q8. Can it detect phase failure?
Yes. Phase failure monitoring is supported for the three-phase line-monitoring application.

Q9. Where is Siemens 7UG0612-1AA21 commonly used?
It can be used in MCC panels, motor control panels, industrial automation systems, machine control cabinets, pumps, fans and three-phase industrial equipment.

Q10. What is the advantage of the 22.5 mm compact design?
The narrow module helps save control-panel space, making it useful where multiple monitoring and control devices need to be installed.

Q11. Can the 1 CO output be connected to an external control circuit?
Yes. The 1 changeover contact can be incorporated into suitable alarm, contactor-control or protection circuits according to the application's electrical design.

Q12. Is 7UG0612-1AA21 a circuit breaker?
No. It is a line monitoring relay. It monitors the electrical supply and changes its relay output when configured abnormal conditions are detected.