3UG4511-1AN20

The Siemens SIRIUS 3UG4511-1AN20 phase sequence monitoring relay monitors a voltage range of 160~260VAC, outputs one set of CO contacts (250VAC/3A), is DIN rail mounted on a 22.5mm wide rail, and is compact and suitable for protection of small three-phase motor circuits.

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Siemens SIRIUS 3UG4511-1AN20 Three-phase voltage phase sequence monitoring relay

Product Positioning

The 3UG4511-1AN20 is a Siemens SIRIUS series three-phase voltage monitoring relay, suitable for 160~260VAC low-voltage power supplies. It features a single switching contact that can instantly detect phase sequence errors and protect small motor equipment.

Core Product Advantages and Features

Low voltage power supply monitoring range

It can monitor 160 to 260VAC three-phase power supplies and is suitable for small motors and low-voltage power distribution systems.

Single switching contact output

Configure one set of CO contacts to simplify the control circuit wiring.

Lightweight and compact body

Weighing approximately 147 grams, the 22.5mm standard width housing facilitates distribution box layout.

Stable phase sequence detection

Automatically detects phase sequence errors and voltage anomalies, reducing the risk of motor reversal.

project	Specification
Product Type	Three-phase voltage/phase sequence monitoring relay
Rated monitoring voltage	3 x 160...260V AC
Output contact form	SPDT (1 set of switching contacts)
Rated capacity of contacts	250V AC / 3A
Terminal block type	Screw terminals
Dimensions of the outer casing (width x height x depth)	22.5 x 110 x 91 mm
net weight	Approximately 147 grams
Protection level	IP20
Operating ambient temperature	-20...+65°C
Product Series	SIRIUS 3UG4

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