insulation monitoring relay for non-grounded (IT) networks up to 400 V AC, 50-60 Hz measuring range 1-100 kOhm supply voltage 24-240 V AC/DC 22.5 mm, 1 changeover contact screw terminal – 3UG4581-1AW31

Siemens 3UG4581-1AW31 Insulation Monitoring Relay – IT Networks up to 400V AC

The Siemens 3UG4581-1AW31 is an insulation monitoring relay designed for non-grounded (IT) electrical networks up to 400 V AC. It continuously monitors insulation resistance and helps detect insulation deterioration before it develops into a more serious electrical fault.

With a measuring range of 1–100 kΩ and a wide 24–240 V AC/DC supply voltage, this Siemens insulation monitoring relay is suitable for a variety of industrial electrical systems. It operates at 50–60 Hz and provides a compact 22.5 mm housing, making it suitable for space-efficient control-panel installations.

The 3UG4581-1AW31 features 1 changeover contact and screw terminal connections for integration into monitoring, alarm, and control circuits.

Key Features

• Siemens 3UG4581-1AW31 insulation monitoring relay

• Designed for non-grounded (IT) networks

• Suitable for networks up to 400 V AC

• Insulation resistance measuring range: 1–100 kΩ

• Supply voltage: 24–240 V AC/DC

• Operating frequency: 50–60 Hz

• Compact 22.5 mm housing

• 1 changeover contact

• Screw terminal connection

• Continuous insulation monitoring

• Suitable for industrial electrical protection systems

Applications

The Siemens 3UG4581-1AW31 is suitable for:

• IT electrical networks

• Insulation monitoring systems

• Industrial control panels

• Electrical distribution systems

• Motor and machine protection

• Industrial automation systems

• Control cabinets

• OEM electrical equipment

• Power supply monitoring

• Electrical systems where continuity of operation is important

Benefits

The Siemens insulation monitoring relay helps detect declining insulation resistance in non-grounded electrical networks. Early detection can support preventive maintenance and reduce the risk of unexpected equipment downtime caused by insulation faults.

Its 1–100 kΩ measuring range provides practical monitoring capability for IT network applications, while the wide 24–240 V AC/DC supply range supports flexible installation.

The compact 22.5 mm housing is well suited to space-constrained control panels, and the changeover contact allows the monitoring signal to be integrated into alarm or control circuits.

Why Buy Siemens 3UG4581-1AW31 from SB Smart?

SB Smart supplies genuine Siemens insulation monitoring relays, monitoring devices, SIRIUS components, motor protection products, contactors, and industrial automation equipment for panel builders, OEMs, electrical contractors, system integrators, and industrial customers.

The Siemens 3UG4581-1AW31 can be sourced through SB Smart with product assistance, availability information, and quotation support.

Frequently Asked Questions

What is Siemens 3UG4581-1AW31?
The Siemens 3UG4581-1AW31 is an insulation monitoring relay designed for non-grounded (IT) networks.

What type of network can 3UG4581-1AW31 monitor?
It is designed for IT networks up to 400 V AC operating at 50–60 Hz.

What is the insulation resistance measuring range?
The specified measuring range is 1–100 kΩ.

What is the supply voltage of Siemens 3UG4581-1AW31?
The relay operates with a supply voltage of 24–240 V AC/DC.

What is the housing width?
The relay has a compact 22.5 mm housing width.

How many contacts does the relay have?
The 3UG4581-1AW31 has 1 changeover contact with screw terminal connection.

What is an IT network?
An IT network is an electrical system in which the active conductors are isolated from earth or connected to earth through a high impedance. Insulation monitoring is used to detect insulation deterioration in such systems.

Where can I buy Siemens 3UG4581-1AW31?
You can contact SB Smart for pricing, availability, and quotation assistance for the Siemens 3UG4581-1AW31 insulation monitoring relay.