3UG4614-1BR20

The Siemens SIRIUS 3UG4614-1BR20 is a digital three-phase voltage monitoring relay that can monitor phase sequence, phase loss, undervoltage, and imbalance. The delay time is adjustable from 0.1 to 20 seconds. It has two sets of switching contacts with screw terminals, which facilitates subsequent wiring maintenance and panel inspection.

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Siemens 3UG4614-1BR20 Digital Voltage Monitoring Relay Product Image

Product Positioning

The 3UG4614-1BR20 is a Siemens SIRIUS digital voltage monitoring relay. Like the 2BR20, it is a multi-functional monitoring model for phase sequence, phase loss, undervoltage, and imbalance. The difference is that it uses a screw terminal wiring method.

Core Product Advantages and Features

Screw terminal wiring

It adopts traditional screw terminals and can accept 0.5~4mm² single core or 0.5~2.5mm² stranded wire, which is convenient for on-site maintenance and replacement.

Multiple monitoring functions

It integrates phase sequence identification, phase loss detection, three-phase undervoltage and 0~20% imbalance monitoring into a single unit.

Delay time flexible adjustment

The startup delay and trigger delay can each be set within the range of 0.1 to 20 seconds.

2 sets of switching contact outputs

It provides two sets of switching contacts, which can facilitate the simultaneous driving of warning and control circuits.

project	Specification
model	3UG4614-1BR20
Monitoring function	Phase sequence identification, phase loss detection, three-phase undervoltage monitoring, and imbalance monitoring.
Voltage monitoring range	3x AC 160~690V, 50/60Hz
Imbalance setting range	0~20% adjustable
Delay time	Both startup and trigger delays are adjustable from 0.1 to 20 seconds.
Output contacts	Two sets of switching contacts (2CO)
Rated current of contacts	AC-15, 3A at 250V/400V
Terminal type	Screw terminals, single core 0.5~4mm² / stranded wire 0.5~2.5mm²
Installation width	22.5mm
Installation method	35mm DIN rail clamping

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