3UG4624-1CS20

The Siemens SIRIUS 3UG4624-1CS20 digital monitoring relay can detect fault (leakage) currents from 30mA to 40A, control power supplies from 90 to 690V AC, and provide two sets of delayed switching contacts, making it suitable for ground fault monitoring applications.

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Siemens SIRIUS 3UG4624-1CS20 Leakage Current and Fault Current Monitoring Station Product Image

Product Positioning

The 3UG4624-1CS20 is a digital fault current monitoring relay from the Siemens SIRIUS series, designed to detect abnormal ground leakage current, and its operating threshold can be set in a wide range of 30mA to 40A.

Core Product Advantages and Features

Wide current measurement range

It can detect fault currents from 30mA to 40A and provides two adjustable action values of 1mA and 2mA to cover a variety of grounding protection needs.

Dual-set delay conversion contacts

Equipped with two sets of delayed switching CO contacts, AC-15 rated at 3A/250V and 400V, convenient for connecting alarms or tripping circuits in series.

Wide voltage control power supply

The control power supply voltage covers 90 to 690V AC, 50/60Hz, and is suitable for various three-phase power supply systems.

Adjustable delay and external reset

The action delay is adjustable from 0.1 to 20 seconds and supports external reset function, improving the flexibility of troubleshooting.

project	Specification
Model (MLFB)	3UG4624-1CS20
Monitoring function	Fault current (leakage current) monitoring, including single-phase overcurrent detection
Current measurement range	30mA ~ 40A (Action value adjustable in 1mA/2mA stages)
Rated control power supply voltage	90...690V AC, 50/60Hz
Output contacts	Two sets of delay switching conversion contacts (CO)
Contact Rating	AC-15 3A/250V, 400V
Action delay time	Adjustable from 0.1 to 20 seconds
Maximum response time	Approximately 300ms
Installation width	22.5mm (standard 35mm guide rail)
Meets standards	IEC 60947-1, IEC 61000-6-2, IEC 61000-6-4, Overvoltage Category III

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