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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3UG4512-2BR20 |
| Alternative Part Number | 3UG45122BR20 |
| Manufacturer | Siemens |
| Product Type | DIN Rail Phase Monitoring Relay |
| Supply Voltage Range | 160 to 690 V AC at 50/60 Hz |
| Number of Phases | 3 Phase |
| Output Contacts | 2 change-over contacts |
| Connection Type | Spring-loaded terminals |
| Mounting Position | Any |
| Mounting Type | Snap-on mounting |
| Width | 22.5 mm |
| Height | 94 mm |
| Depth | 91 mm |
| Operating Temperature Range | -25 to +60 °C during operation |
| Storage Temperature Range | -40 to +85 °C |
| Installation Altitude | Up to 2000 m above sea level |
| Protection Class | IP20 |
| Electromagnetic Compatibility | IEC 60947-1 / IEC 61000-6-2 / IEC 61000-6-4 |
| Vibration Resistance | 1 to 6 Hz: 15 mm, 6 to 500 Hz: 2g |
| Shock Resistance | Sinusoidal half-wave 15g / 11 ms |
| Insulation Voltage | 690 V for overvoltage category III with degree of pollution 3 |
| Degree of Pollution | 3 |
| Product Functions | Phase sequence recognition, phase disturbance recognition, self-reset |
| Mechanical Operating Cycles | Typical 10,000,000 |
| Electrical Operating Cycles | At AC-15 / at 230 V / typical 100,000 |
| Continuous Current | 5 A thermal current of the contact-affected switching element / maximum |
| Galvanic Isolation | Between input and output, between the outputs, between the voltage supply and other circuits |
The Siemens 3UG4512-2BR20 is a sophisticated phase monitoring relay designed for seamless integration into industrial control systems. This DIN rail-mounted device ensures the reliability and stability of three-phase electrical networks by actively monitoring phase sequences and failures. Engineered to operate within a broad voltage range of 160 to 690 V AC at both 50 and 60 Hz, it is versatile enough to suit a variety of global electrical standards.
The unit features two change-over contacts, providing flexibility in signalling and control circuitry. Its spring-loaded connection system simplifies installation and maintenance, making it a user-friendly option for professionals. The 3UG4512-2BR20 boasts a compact design with a width of just 22.5 mm, allowing for efficient use of control panel space.
With an insulation voltage rated at 690 V for overvoltage category III and a degree of pollution 3, this monitoring relay is built to withstand challenging industrial environments. It also offers resistance to shock and vibration in accordance with IEC standards, ensuring robust performance and a long service life.
The LED display provides clear and immediate status indication, while the auto-reset function ensures the device is ready to operate without manual intervention after a fault condition has been cleared. The 3UG4512-2BR20 is an essential component for safeguarding electrical equipment from phase-related issues, thus contributing to the overall uptime and efficiency of your operations.
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Frequently Asked Questions
What is the purpose of this monitoring relay?
The monitoring relay is designed for the detection of phase failures and phase sequence in three-phase electrical systems. It ensures that the phases are present and correctly ordered, which is crucial for the protection of three-phase motors and other equipment.
Can this relay be mounted in any position?
Yes, the relay is designed with a flexible mounting position, allowing it to be installed in any orientation that suits the application.
What type of connections does this relay support?
The relay features spring-loaded terminals, which provide a secure and maintenance-free connection for solid or stranded conductors.
Is there a need to maintain a certain distance to earthed parts during installation?
No, there is no specific distance to be maintained to earthed parts when installing this relay, as per the product specifications.
What is the operating temperature range for this relay?
The relay can operate within an ambient temperature range of -25 to +60 degrees Celsius, making it suitable for a variety of industrial environments.
Does this relay have LED indicators?
Yes, the relay is equipped with LED indicators for easy monitoring of its status and diagnostics.
What is the insulation voltage rating for this relay?
The relay has an insulation voltage rating of 690 V for overvoltage category III, with a degree of pollution 3, ensuring adequate insulation for safety and reliability.
How does this relay handle electromagnetic compatibility?
The relay is designed to comply with EMC standards, including IEC 60947-1, IEC 61000-6-2, and IEC 61000-6-4, ensuring minimal electromagnetic interference with other devices.
What is the maximum installation altitude for this relay?
The relay can be installed at altitudes up to 2,000 meters above sea level without derating.
What certifications does this relay have?
The relay comes with general product approvals and EMC declarations of conformity, which attest to its compliance with industry standards and regulations.
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