3RTActive
SIRIUS 3RT power contactors
SIRIUS 3RT power contactors
Siemens three-pole power contactors for switching motors, from size S00 to S12 and up to 250 kW at 400 V, with AC, DC and AC/DC coils
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© Siemens AG
siriusSeries 3UGActive
SIRIUS 3UG monitoring relays
SIRIUS 3UG
Siemens monitoring relays for phase, voltage and current control: phase sequence and failure, asymmetry, frequency, under- and overvoltage, current and power, insulation resistance and DC loads; most models 22.5 mm wide
Price and delivery time are given after a technical review.
Overview
Overview
The Siemens SIRIUS 3UG monitoring relay watches a line or a load and, when a quantity leaves its permitted range, warns through its output contact or trips the circuit. Line faults such as the loss of one phase or a wrong phase sequence are found early, which prevents damage to motors, compressors and cranes. Depending on the model it monitors phase sequence, phase failure with or without the neutral conductor, phase asymmetry, frequency, undervoltage, overvoltage, current, power factor, power, speed and fill level.
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What is monitored
- Line monitoring relays (3UG5512, 3UG5514, 3UG5616, 3UG5618): phase sequence, phase failure, asymmetry and, on the higher models, the neutral conductor, frequency, undervoltage and overvoltage; three-phase networks up to 690 V at 15 to 70 Hz. 3UG5618 also corrects the direction of rotation automatically.
- Voltage and current with analog setting: 3UG5532 for voltage from 10 to 690 V AC/DC and 3UG5522 for current from 0.05 to 10 A AC/DC, both with a 0.5 to 30 s delay.
- Digital combi device 3UG5642: current, active current, voltage, power factor and power up to 690 V and 10 A. Its IO-Link version is 3UG5842, and Bluetooth versions carry the 3UG57 prefix.
- Insulation resistance (3UG458): for ungrounded IT networks; for example 3UG4581-1AW31 with a 1 to 100 kOhm range up to 400 V AC.
- DC loads (3UG546): DC current, voltage and power with counters for energy, operating hours and switching cycles, and PROFINET communication.
Generations: 3UG4 and 3UG5
The 3UG5 generation was introduced with the line monitoring relays in August 2023, and Siemens' 11/2024 brochure covers the whole family. Siemens' conversion table names a 3UG5 successor for every 3UG4. In place of the digital voltage and current relays of 3UG4 the new generation offers two choices: a device with analog setting or a digital combi device. The data sheet of 3UG4616-1CR20 is marked 'product phase-out' and names 3UG5616-1CR20 as the preferred successor. Many 3UG4 devices are still installed in panels, so check the status of each article number separately.
Safety and communication
The safety versions reach SIL 1 to IEC 62061 and PL c to EN ISO 13849-1 (for example 3UG5512-1AR21). The IO-Link versions send measured values and trends to the PLC or a cloud solution, and the Bluetooth versions are parameterised with the SENTRON Power app. On the 3UG5 generation the device has four buttons and a multicolor display, and a teach function lets you take a limit from the current measured value.
Features
- Three-phase line monitoring: phase sequence, phase failure, asymmetry, neutral conductor (adjustable), frequency, undervoltage and overvoltage
- 3 x 90 to 690 V (3UG5616) or 3 x 160 to 690 V (3UG5512) networks at 15 to 70 Hz
- Voltage monitoring from 10 to 690 V AC/DC and current monitoring from 0.05 to 10 A AC/DC with analog setting
- Digital combi device for current, active current, voltage, cos phi and power up to 690 V and 10 A
- Adjustable delay up to 999.9 s on the digital models and 30 s on the analog models
- Safety versions SIL 1 / PL c, Bluetooth versions and IO-Link versions
- Insulation relay for IT networks (1 to 100 kOhm) and a DC load relay with PROFINET
- 22.5 mm wide on most devices; removable screw-type or push-in terminals
Advantages
- Line faults are detected early, so motors and compressors are not damaged by phase loss or a wrong phase sequence
- One device for all voltage ranges up to 690 V, which means less variety in stock
- A device can be replaced without rewiring thanks to the removable terminals
- Teach function: the current measured value is shown on the display and can be taken as the limit
Models and codes
| Model | Order code | Code type | Attributes | Request |
|---|---|---|---|---|
| 3UG5512-2AR20 line monitoringرلهٔ پایش شبکه برای توالی فاز، قطعی فاز و عدم تقارن در شبکهٔ ۳×۱۶۰ تا ۶۹۰ ولت AC و ۱۵ تا ۷۰ هرتز؛ یک کنتاکت تبدیل، نمایشگر LED، ریست خودکار و ترمینال فنری (push-in) | 3UG5512-2AR20 | Exact code |
| Request 3UG5512-2AR20 line monitoring |
| 3UG5512-1AR21 line monitoring, safety versionهمان 3UG5512 در نسخهٔ ایمنی SIL 1 / PL c، با ترمینال پیچی | 3UG5512-1AR21 | Exact code |
| Request 3UG5512-1AR21 line monitoring, safety version |
| 3UG5616-1CR20 line monitoring, digitalرلهٔ پایش شبکهٔ دیجیتال برای توالی فاز، قطعی فاز، عدم تقارن، سیم نول (قابل تنظیم)، فرکانس، کم‌ولتاژی و اضافه‌ولتاژی در شبکهٔ ۳×۹۰ تا ۶۹۰ ولت AC و ۱۵ تا ۷۰ هرتز؛ دو کنتاکت تبدیل، نمایشگر LCD و ترمینال پیچی | 3UG5616-1CR20 | Exact code |
| Request 3UG5616-1CR20 line monitoring, digital |
| 3UG5716-1CR20 line monitoring, Bluetoothهمان 3UG5616 با پارامتردهی از طریق بلوتوث | 3UG5716-1CR20 | Exact code |
| Request 3UG5716-1CR20 line monitoring, Bluetooth |
| 3UG5532-1AW30 voltage monitoring, analogرلهٔ پایش ولتاژ با تنظیم آنالوگ برای کم‌ولتاژی و اضافه‌ولتاژی از ۱۰ تا ۶۹۰ ولت AC/DC؛ تغذیهٔ کمکی ۲۴ تا ۲۴۰ ولت AC/DC، تأخیر ۰٫۵ تا ۳۰ ثانیه، یک کنتاکت تبدیل | 3UG5532-1AW30 | Exact code |
| Request 3UG5532-1AW30 voltage monitoring, analog |
| 3UG5522-1AW30 current monitoring, analogرلهٔ پایش جریان با تنظیم آنالوگ برای کم‌جریانی و اضافه‌جریانی از ۰٫۰۵ تا ۱۰ آمپر AC/DC؛ تغذیهٔ کمکی ۲۴ تا ۲۴۰ ولت AC/DC، تأخیر ۰٫۵ تا ۳۰ ثانیه، یک کنتاکت تبدیل | 3UG5522-1AW30 | Exact code |
| Request 3UG5522-1AW30 current monitoring, analog |
| 3UG5642-1CW30 digital combi deviceدستگاه دیجیتال ترکیبی برای جریان، جریان فعال، ولتاژ، ضریب توان و توان تا ۶۹۰ ولت AC/DC و ۱۰ آمپر؛ تغذیهٔ ۲۴ تا ۲۴۰ ولت AC/DC، تأخیر وصل و تأخیر قطع ۰٫۱ تا ۹۹۹٫۹ ثانیه، دو کنتاکت تبدیل | 3UG5642-1CW30 | Exact code |
| Request 3UG5642-1CW30 digital combi device |
| 3UG5842-2AA40 digital combi device, IO-Linkهمان دستگاه ترکیبی با IO-Link؛ تغذیهٔ ۲۴ ولت DC، یک کنتاکت تبدیل و ترمینال فنری (push-in) | 3UG5842-2AA40 | Exact code |
| Request 3UG5842-2AA40 digital combi device, IO-Link |
| 3UG4581-1AW31 insulation monitoringرلهٔ پایش عایقی برای شبکه‌های IT بدون اتصال زمین تا ۴۰۰ ولت AC، ۵۰ تا ۶۰ هرتز؛ محدودهٔ اندازه‌گیری ۱ تا ۱۰۰ کیلواهم، تغذیهٔ ۲۴ تا ۲۴۰ ولت AC/DC، یک کنتاکت تبدیل، ۲۲٫۵ میلی‌متر | 3UG4581-1AW31 | Exact code |
| Request 3UG4581-1AW31 insulation monitoring |
| 3UG5461-1AA41 DC load monitoring, PROFINETرلهٔ پایش بار DC با PROFINET برای حداکثر ۲×۸ آمپر یا ۱×۱۶ آمپر و ۶۰ ولت DC؛ پایش حد بالا و پایین جریان، ولتاژ و توان، شمارندهٔ انرژی، ساعت کار و تعداد قطع و وصل؛ تغذیهٔ ۲۴ ولت DC | 3UG5461-1AA41 | Exact code |
| Request 3UG5461-1AA41 DC load monitoring, PROFINET |
| 3UG4616-1CR20 line monitoring, predecessor (phase-out)نسل قبلی در حال حذف: رلهٔ پایش شبکهٔ دیجیتال ۳×۹۰ تا ۴۰۰ ولت AC و ۵۰ تا ۶۰ هرتز، با هیسترزیس ۱ تا ۲۰ ولت، تأخیر ۰ تا ۲۰ ثانیه و دو کنتاکت تبدیل (یکی برای Umin و یکی برای Umax)؛ جایگزین ترجیحی طبق برگهٔ داده 3UG5616-1CR20 | 3UG4616-1CR20 | Exact code |
| Request 3UG4616-1CR20 line monitoring, predecessor (phase-out) |
Technical specifications
Check the specifications against the data sheet of the exact code before ordering.
| Housing widthHousing width | 22.5 (DC load relay 3UG5462: 45) mm |
|---|---|
| TerminalsTerminals | Screw-type or push-in, removable |
| MountingMounting | Snap-on 35 mm DIN rail or screw mounting; any position |
| Degree of protection (front)Degree of protection (front) | IP20 |
| Ambient temperature, operationAmbient temperature, operation | -25 ... +60 °C |
| GenerationsGenerations | 3UG5 (current); 3UG4 (predecessor, 3UG5 successor named in Siemens' conversion table) |
| Monitored line voltage (3UG5512)Monitored line voltage (3UG5512) | 3 x 160 ... 690 V AC |
|---|---|
| Monitored line voltage (3UG5616)Monitored line voltage (3UG5616) | 3 x 90 ... 690 V AC |
| Monitored frequencyMonitored frequency | 15 ... 70 Hz |
| Line monitoring functionsLine monitoring functions | 3UG5512: phase sequence, phase failure, phase asymmetry; 3UG5616: additionally N conductor (adjustable), frequency, undervoltage, overvoltage |
| Adjustable delay (3UG5616)Adjustable delay (3UG5616) | 0.1 ... 999.9 s |
| Maximum response time (3UG5512)Maximum response time (3UG5512) | 500 ms |
| Control supply voltage of the line monitoring relaysControl supply voltage of the line monitoring relays | 200 ... 690 V AC (data sheet lists no separate auxiliary supply) |
| DisplayDisplay | 3UG5512: LED; 3UG5616: LCD |
| Voltage monitoring, analog setting (3UG5532)Voltage monitoring, analog setting (3UG5532) | 10 ... 690 V AC/DC; trip delay 0.5 ... 30 s |
|---|---|
| Current monitoring, analog setting (3UG5522)Current monitoring, analog setting (3UG5522) | measurable 0.05 ... 10 A AC/DC; adjustable response value 0.1 ... 10 A; trip delay 0.5 ... 30 s |
| Auxiliary supply voltage (analog and combi devices)Auxiliary supply voltage (analog and combi devices) | 24 ... 240 V AC/DC |
| Digital combi device (3UG5642)Digital combi device (3UG5642) | Current, active current, voltage, power factor, power; up to 690 V AC/DC and 10 A; ON delay and tripping delay 0.1 ... 999.9 s |
| IO-Link version (3UG5842)IO-Link version (3UG5842) | Same quantities; 24 V DC supply; 1 CO |
| Insulation relay 3UG4581-1AW31Insulation relay 3UG4581-1AW31 | IT networks up to 400 V AC, 50 ... 60 Hz; measuring range 1 ... 100 kOhm; supply 24 ... 240 V AC/DC; 1 CO |
|---|---|
| Insulation relays 3UG4582 and 3UG4583Insulation relays 3UG4582 and 3UG4583 | 3UG4582-1AW30: 0-250 V AC / 0-300 V DC; 3UG4583-1CW30: 0-400 V AC / 0-600 V DC, 2 CO; with module 3UG4983-1A up to 690 V AC / 1000 V DC |
| DC load relay 3UG5461-1AA41DC load relay 3UG5461-1AA41 | max 2 x 8 A / 1 x 16 A DC, max 60 V; PROFINET; 24 V DC supply; 1 CO |
| 3UG546 family3UG546 family | 0 ... 800 V; 2 x 8 A / 1 x 16 A at 22.5 mm; up to 63 A at 45 mm; PROFINET |
| Number of contactsNumber of contacts | 1 CO (3UG5512, 3UG5522, 3UG5532, 3UG5842, 3UG4581, 3UG5461); 2 CO (3UG5616, 3UG5642) |
|---|---|
| Contact current AC-15 at 250 VContact current AC-15 at 250 V | 3 A |
| Contact current DC-13Contact current DC-13 | 1 A at 24 V; 0.2 A at 125 V; 0.1 A at 250 V |
| Thermal current of the contactsThermal current of the contacts | 5 A |
| Short-circuit protection of the contactsShort-circuit protection of the contacts | gL/gG 6 A or MCB type C 1 A |
| Functional safety (safety versions)Functional safety (safety versions) | SIL 1 (IEC 62061), PL c (EN ISO 13849-1), e.g. 3UG5512-1AR21 |
|---|---|
| CommunicationCommunication | IO-Link on 3UG58; Bluetooth on 3UG57 (SENTRON Power app); PROFINET on 3UG546 |
| Other quantities monitored in the familyOther quantities monitored in the family | Speed and fill level |
Modules and accessories
Series module for 3UG4583 (3UG4983-1A)
Series module that extends the voltage range of the 3UG4583 insulation relay to 690 V AC and 1000 V DC
Sealable transparent cover for 3UG4581 and 3UG4582 (3UG4981-0C)
Sealable transparent cover for the 3UG4581 and 3UG4582 insulation relays
Sealable transparent cover for 3UG4583 (3UG4983-0C)
Sealable transparent cover for the 3UG4583 insulation relay
Documents
- View on the manufacturer's site(opens in a new tab)
Brochure
SIRIUS 3UG5 monitoring relays, basic information (with 3UG4 to 3UG5 conversion)
SIRIUS 3UG5 monitoring relays, basic information (with 3UG4 to 3UG5 conversion)
Language: English · Version 11/2024
- View on the manufacturer's site(opens in a new tab)
Brochure
SIRIUS 3UG5 line monitoring relays, basic information
SIRIUS 3UG5 line monitoring relays, basic information
Language: English · Version 06/2023
- View on the manufacturer's site(opens in a new tab)
Other
Siemens launches new SIRIUS 3UG5 line monitoring relays (press release)
Siemens launches new SIRIUS 3UG5 line monitoring relays (press release)
Language: English · Version 08/2023
- View on the manufacturer's site(opens in a new tab)
Other
SIRIUS 3UG546: Multi-functional load monitoring relay for DC applications (press release)
SIRIUS 3UG546: Multi-functional load monitoring relay for DC applications (press release)
Language: English · Version 07/2019
- View on the manufacturer's site(opens in a new tab)
Manual
SIRIUS 3UG4 / 3RR2 monitoring relay, equipment manual
SIRIUS 3UG4 / 3RR2 monitoring relay, equipment manual
Language: English · Version 07/2022
- View on the manufacturer's site(opens in a new tab)
Manual
SIRIUS 3UG48 / 3RR24 monitoring relays for IO-Link, equipment manual
SIRIUS 3UG48 / 3RR24 monitoring relays for IO-Link, equipment manual
Language: English · Version 04/2025
- View on the manufacturer's site(opens in a new tab)
Manual
SIRIUS 3UG5461 / 3UG5462 DC load monitoring relays, manual
SIRIUS 3UG5461 / 3UG5462 DC load monitoring relays, manual
Language: English
- View on the manufacturer's site(opens in a new tab)
Brochure
Monitoring, Controlling and Switching with SIRIUS Relays
Monitoring, Controlling and Switching with SIRIUS Relays
Language: English · Version 2019
- View on the manufacturer's site(opens in a new tab)
Catalog
SIRIUS relays, chapter 12 of the Industrial Control Catalog IC 10 (Siemens Canada 2019)
SIRIUS relays, chapter 12 of the Industrial Control Catalog IC 10 (Siemens Canada 2019)
Language: English · Version 2019
- View on the manufacturer's site(opens in a new tab)
Data sheet
Data sheet 3UG5616-1CR20
Data sheet 3UG5616-1CR20
Language: English
- View on the manufacturer's site(opens in a new tab)
Data sheet
Data sheet 3UG5512-2AR20
Data sheet 3UG5512-2AR20
Language: English
- View on the manufacturer's site(opens in a new tab)
Data sheet
Data sheet 3UG5642-1CW30
Data sheet 3UG5642-1CW30
Language: English
Official manufacturer links
Applications
- Motors and compressors for air conditioning, elevators and cranes
- Process industry and hospitals, where a stable supply matters
- Wind turbine generators and 16 2/3 Hz railway networks
- Line monitoring behind converters with an unstable frequency
- Ungrounded IT networks: emergency power, emergency lighting and industries that rely on availability of supply
Frequently asked questions
What is the difference between 3UG4 and 3UG5, and which should I buy?
3UG5 is the new generation that came in August 2023 with the line monitoring relays, and Siemens' 11/2024 brochure covers the whole family; Siemens' conversion table names a 3UG5 successor for each 3UG4. Instead of the digital voltage and current relays of 3UG4, 3UG5 offers either an analog-setting device or a digital combi device. For a new design take 3UG5. To replace an old device, find its 3UG4 number in the conversion table and compare the data; for example the digital line monitoring relay 3UG4614 is replaced by the line monitoring relay 3UG5514 with analog setting, as a footnote of Siemens' conversion table says.
Which model protects a motor against phase loss and a wrong phase sequence?
3UG5512 covers phase sequence, phase failure and asymmetry on 3 x 160 to 690 V with one changeover contact and also exists as a SIL 1 / PL c safety version (3UG5512-1AR21). If you also want the neutral conductor, frequency, undervoltage and overvoltage and need an adjustable delay, take the digital 3UG5616 with two changeover contacts. 3UG5618 additionally corrects the direction of rotation automatically.
Does a monitoring relay need a separate auxiliary supply?
It depends on the model. The analog voltage and current relays (3UG5532 and 3UG5522) and the combi device 3UG5642 need a 24 to 240 V AC/DC auxiliary supply, and the IO-Link version 3UG5842 needs 24 V DC. Siemens' conversion table also lists devices that are 'self-powered without auxiliary voltage' separately (such as 3UG5533-1AL30 and 3UG5643-1CS20). For the line monitoring relays 3UG5512 and 3UG5616 the data sheet gives a control supply voltage of 200 to 690 V AC, which is the line voltage range, and mentions no separate auxiliary supply.
What network is an insulation monitoring relay for?
For ungrounded IT networks, such as emergency power and emergency lighting. After the first insulation fault work can continue safely, but the fault must be cleared before a second one occurs. The insulation relay constantly measures the resistance of phase and neutral to earth and signals a fault when it drops below the set value. 3UG4581-1AW31 is for AC networks up to 400 V with a range of 1 to 100 kOhm.
How do the safety and Bluetooth versions differ from the standard model?
The safety versions (such as 3UG5512-1AR21 and 3UG5618-1CR21) are certified for safety-related circuits to SIL 1 under IEC 62061 and PL c under EN ISO 13849-1. The Bluetooth version (such as 3UG5716-1CR20) works like 3UG5616 but is parameterised over Bluetooth with the SENTRON Power app. The IO-Link version (such as 3UG5842) sends data to the PLC or a cloud solution.
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