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Siemens 3UG4512-1AR20 | Reliable Phase Monitoring for 3-Phase Systems
Overview
The Siemens 3UG4512-1AR20 is a SIRIUS series analog phase monitoring relay designed to detect phase failure and incorrect phase sequence in 3-phase systems. Operating within a voltage range of 160–690 V AC at 50/60 Hz, it ensures the protection of equipment by monitoring the integrity of the power supply. The device features a single-pole double-throw (SPDT) output contact and is suitable for DIN rail mounting with screw terminal connections.
Key Features
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Product Line: SIRIUS 3UG4
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Monitoring Functions:
-
Phase failure detection
-
Phase sequence monitoring
-
-
Voltage Range: 3 × 160–690 V AC (50/60 Hz)
-
Output Contact: 1 SPDT (changeover)
-
Mounting: DIN rail
-
Terminals: Screw-type
-
Protection Class: IP20
-
Status Indication: LED indicators
-
Auto-Reset Function: Yes
-
Compact Design: 22.5 mm width
Technical Specifications
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Catalog Number: 3UG4512-1AR20
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Control Supply Voltage: 160–690 V AC
-
Response Time: ≤ 450 ms
-
Startup Delay: 1,000 ms
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Output Ratings:
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AC-15:
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250 V: 3 A
-
400 V: 3 A
-
-
DC-13:
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24 V: 1 A
-
125 V: 0.2 A
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250 V: 0.1 A
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-
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Thermal Current (Ith): 5 A
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Power Consumption: 2 W
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Insulation Voltage: 690 V
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Surge Voltage Resistance: 6 kV
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Operating Temperature: -25°C to +60°C
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Storage Temperature: -40°C to +85°C
-
Dimensions (W × H × D): 22.5 mm × 83 mm × 91 mm
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Weight: 119 g
-
Mounting Position: Any
-
Standards Compliance:
-
IEC 60947-1
-
IEC 61000-6-2
-
IEC 61000-6-4
-
RoHS compliant since May 1, 2012
-
Applications
-
Monitoring of 3-phase power supplies in industrial automation
-
Protection of motors and equipment from phase loss or incorrect phase sequence
-
Use in control panels, switchgear, and distribution boards
-
Suitable for systems requiring reliable phase monitoring without asymmetry detection
Why Choose the 3UG4512-1AR20?
-
Wide Voltage Range: Compatible with various 3-phase systems
-
Compact Design: Saves space in control panels
-
Reliable Protection: Detects critical phase issues to prevent equipment damage
-
Easy Installation: DIN rail mounting with screw terminals
-
Status Indication: LED indicators provide clear operational status
Order Now
Available for immediate shipping.
Description
Siemens 3UG4512-1AR20 | Reliable Phase Monitoring for 3-Phase Systems
Overview
The Siemens 3UG4512-1AR20 is a SIRIUS series analog phase monitoring relay designed to detect phase failure and incorrect phase sequence in 3-phase systems. Operating within a voltage range of 160–690 V AC at 50/60 Hz, it ensures the protection of equipment by monitoring the integrity of the power supply. The device features a single-pole double-throw (SPDT) output contact and is suitable for DIN rail mounting with screw terminal connections.
Key Features
-
Product Line: SIRIUS 3UG4
-
Monitoring Functions:
-
Phase failure detection
-
Phase sequence monitoring
-
-
Voltage Range: 3 × 160–690 V AC (50/60 Hz)
-
Output Contact: 1 SPDT (changeover)
-
Mounting: DIN rail
-
Terminals: Screw-type
-
Protection Class: IP20
-
Status Indication: LED indicators
-
Auto-Reset Function: Yes
-
Compact Design: 22.5 mm width
Technical Specifications
-
Catalog Number: 3UG4512-1AR20
-
Control Supply Voltage: 160–690 V AC
-
Response Time: ≤ 450 ms
-
Startup Delay: 1,000 ms
-
Output Ratings:
-
AC-15:
-
250 V: 3 A
-
400 V: 3 A
-
-
DC-13:
-
24 V: 1 A
-
125 V: 0.2 A
-
250 V: 0.1 A
-
-
-
Thermal Current (Ith): 5 A
-
Power Consumption: 2 W
-
Insulation Voltage: 690 V
-
Surge Voltage Resistance: 6 kV
-
Operating Temperature: -25°C to +60°C
-
Storage Temperature: -40°C to +85°C
-
Dimensions (W × H × D): 22.5 mm × 83 mm × 91 mm
-
Weight: 119 g
-
Mounting Position: Any
-
Standards Compliance:
-
IEC 60947-1
-
IEC 61000-6-2
-
IEC 61000-6-4
-
RoHS compliant since May 1, 2012
-
Applications
-
Monitoring of 3-phase power supplies in industrial automation
-
Protection of motors and equipment from phase loss or incorrect phase sequence
-
Use in control panels, switchgear, and distribution boards
-
Suitable for systems requiring reliable phase monitoring without asymmetry detection
Why Choose the 3UG4512-1AR20?
-
Wide Voltage Range: Compatible with various 3-phase systems
-
Compact Design: Saves space in control panels
-
Reliable Protection: Detects critical phase issues to prevent equipment damage
-
Easy Installation: DIN rail mounting with screw terminals
-
Status Indication: LED indicators provide clear operational status
Order Now
Available for immediate shipping.