3UG4511-1AP20

The Siemens SIRIUS 3UG4511-1AP20 phase sequence monitoring relay monitors a voltage range of 320~500VAC, outputs one set of CO contacts (250VAC/3A), has a response time of approximately 450ms, and can be mounted on a 22.5mm wide DIN rail. It is suitable for medium and high voltage motor circuit protection.

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Siemens SIRIUS 3UG4511-1AP20 Three-phase voltage phase sequence monitoring relay

Product Positioning

The 3UG4511-1AP20 is a Siemens SIRIUS series three-phase voltage monitoring relay, applicable to a voltage range of 320~500VAC. It features a single switching contact output and can quickly detect phase sequence and voltage abnormalities to protect motor equipment.

Core Product Advantages and Features

Medium and high voltage monitoring range

It can monitor three-phase power supplies from 320 to 500VAC, covering common industrial power distribution voltage levels.

Single switching contact output

Configure one set of CO contacts, suitable for simple configuration of single alarm or interlocking loops.

quick action reaction

With a response time of approximately 450 milliseconds, it can detect phase sequence and voltage anomalies early.

Simplified DIN rail design

The 22.5mm standard width housing saves space in the control box during installation.

project	Specification
Product Type	Three-phase voltage/phase sequence monitoring relay
Rated monitoring voltage	3 x 320...500V AC
Output contact form	SPDT (1 set of switching contacts)
Rated capacity of contacts	250V AC / 3A
Action response time	Approximately 450 ms
Terminal block type	Screw terminals
Dimensions of the outer casing (width x height x depth)	22.5 x 110 x 91 mm
Protection level	IP20
Installation method	DIN rail (35mm)
Product Series	SIRIUS 3UG4

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