# Siemens 3UG4513-1BR20 Phase Sequence and Undervoltage Monitoring Relay

**URL:** https://aio.lv/en/product--siemens-3ug4513-1br20--1792982
**Data updated:** 2026-05-18 02:46 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** Siemens
**Manufacturer code:** 3UG4513-1BR20
**EAN:** 4011209642263
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 198.49 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 164.04 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3ug4513-1br20--1792982

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3UG4513-1BR20 is a professional monitoring relay designed for phase sequence and undervoltage detection in electrical systems. It operates within a voltage range of 160-690V AC with an adjustable time delay of 0.1-20 seconds. This reliable device ensures operational safety and equipment protection, featuring EAC, UL, and CCC certifications. Ideal for industrial automation and electrical panel applications requiring precise power monitoring.

## Long description

The Siemens 3UG4513-1BR20 is a professional-grade monitoring relay engineered to provide precise oversight of electrical systems by detecting phase sequence, phase failure, and undervoltage conditions. This device is essential for maintaining the integrity of industrial equipment by ensuring that power supply parameters remain within safe operating limits. It is designed for three-phase networks and offers robust performance in demanding electrical environments.
Advantages
This monitoring relay offers significant operational benefits, including high reliability and precise detection capabilities. By monitoring for phase sequence and undervoltage, it prevents potential damage to motors and sensitive electronic components caused by unstable power conditions. The inclusion of an adjustable time delay allows for flexible configuration, preventing nuisance tripping during minor, transient voltage fluctuations. Its compact design and screw terminal connections facilitate straightforward installation in standard electrical control panels.
Suitable for
Industrial automation systems
Protection of three-phase motors
Electrical distribution panels
Monitoring of power supply stability in manufacturing plants
This device may not be suitable for single-phase electrical systems or applications requiring DC voltage monitoring. It is specifically calibrated for three-phase AC networks and will not function correctly if used outside of its specified voltage and frequency ranges.
Key specifications
Voltage range: 3 x 160 to 690 V AC
Frequency: 50 to 60 Hz
Monitoring functions: Phase sequence, phase failure, undervoltage, and asymmetry
Asymmetry: 20% fixed
Hysteresis: 5% fixed
Time delay: 0.1 to 20 seconds (adjustable)
Output: 2 change-over contacts
Connection type: Screw terminals
How to use
The relay should be installed by a qualified professional within an electrical enclosure. Connect the three-phase supply lines to the designated input terminals. Configure the desired time delay using the adjustment dial on the front of the unit to suit the specific requirements of the connected load. Once powered, the device will continuously monitor the phase status and voltage levels, automatically triggering the change-over contacts if a fault is detected.
What to consider before purchase
Verify that your system operates within the 160-690V AC range.
Ensure the installation environment is compatible with the device's physical dimensions and terminal type.
Confirm that the monitoring requirements match the device's fixed asymmetry and hysteresis settings.
Usage recommendations
Regularly inspect the terminal connections to ensure they remain tight and free from corrosion. Periodically test the relay functionality during scheduled maintenance to confirm that the monitoring and tripping mechanisms operate according to the configured parameters.

## Specifications

| Feature | Value |
|---|---|
| Dimensions (WxDxH) | 22.5 x 91 x 92 |
| Weight | 0.1452 kg |
| Certification | EAC
UL
CCC |
| Operating temperature (T-T) | -25 - 60 |
| LED indicators | Y |
| Product colour | Grey |
| Wi-Fi | No |
| Country of origin | Germany |
| Package depth | 99 mm |
| Package height | 107 mm |
| Package width | 29 mm |
| Remotely operated | No |
| AC input frequency | 50 / 60 |
| Number of poles | 3 |
| Number of contacts | 2 |
| Sustainability compliance | Yes |
| Sustainability certificates | CE, WEEE, RoHS, REACH |

## FAQ

### How much does the Siemens 3UG4513-1BR20 Monitoring Relay cost, and is it available for purchase?

The price is 198.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Siemens 3UG4513-1BR20 Monitoring Relay be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for Siemens 3UG4513-1BR20 Monitoring Relay?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/1792982/58084549_large.webp