Description
Siemens 3UG4615-2CR20 monitoring relay — description and applications
The Siemens 3UG4615-2CR20 monitoring relay is a device from the SIRIUS 3UG46 family, designed to supervise three-phase supply parameters in industrial installations. It monitors phase sequence, detects phase failure, and identifies voltage rising above or dropping below the set thresholds (Umin delay / Umax delay functions marked on the housing). It is a component used by maintenance departments, system integrators, and machine builders who want to protect motors and other three-phase loads against the effects of faulty power supply.
The device features a built-in LCD display and navigation buttons (▲, ▼, Enter) that allow operating parameters to be configured without additional software. The Siemens 3UG4615-2CR20 monitoring relay connects to phases L1, L2, L3, and signals its status via two independent sets of changeover contacts.
Key features
- Phase sequence monitoring and phase failure detection
- Overvoltage (Umax) and undervoltage (Umin) monitoring with adjustable delay time
- Fault memory function (Mem) for signalled faults
- Two sets of changeover contacts, 1 CO + 1 CO, with spring-type terminals
- LCD display with push-button parameter configuration
- Supply voltage range 160-690 V AC, wide range of applications (exact setting thresholds to be verified)
Technical specifications
| Parameter | Value |
|---|---|
| Manufacturer | Siemens |
| Series | SIRIUS 3UG46 |
| Catalog number (MPN) | 3UG4615-2CR20 |
| Type | Monitoring relay / voltage and phase monitoring |
| Supply voltage (Us) | 3 x 160-690 V AC |
| Insulation voltage (Ui) | 690 V |
| Impulse withstand voltage (Uimp) | 6 kV |
| Output contacts | 1 CO + 1 CO, spring-type, terminals 11/12/14 and 21/22/24 |
| Contact circuit protection | fuse max. 4 A gL/gG |
| Conductor cross-section | 2 x 0,25-1,5 mm² / 2 x AWG 24-16 |
| Standard | IEC/EN 60947-5-1, GB/T 14048.5 |
| Temperature class (UL) | 155°C, IND. CONT. EQ. |
| Condition | Brand new (factory new), no signs of installation (based on photos) |
Applications
Relays of this class are used in control cabinets of production machinery, low-voltage switchgear, and three-phase motor power supply systems where protection against incorrect phase sequence or voltage fluctuations is essential. They are used by automation integrators, by maintenance departments in industrial plants, and in the modernization of existing electrical installations.
Condition and scope of delivery
This unit is brand new (factory new), sourced from surplus stock (new-old-stock) – unused and never installed. The photos show the original Siemens cardboard packaging with a label containing the catalogue number, batch code, and the QTY: 1 marking. In this form, the Siemens 3UG4615-2CR20 monitoring relay is a fully-fledged new component, often no longer available through regular distribution or subject to long lead times from the manufacturer. Please review all product photos carefully, as they form an integral part of the description.
Why RECOSTOCK
At RECOSTOCK we offer brand new (factory new) industrial automation components from surplus stock and liquidations, at prices lower than in regular distribution. Every transaction is documented with a VAT invoice, and shipments are packed appropriately for sensitive industrial electronics. We ship from Poland and can help you verify markings and select a replacement if the exact model is no longer available from the manufacturer.
Compatibility and installation
The device belongs to the Siemens SIRIUS 3UG46 series and is designed to work with three-phase circuits in the 160-690 V AC range. Before purchasing, be sure to compare the full catalogue number 3UG4615-2CR20 character by character with the technical documentation of the machine or the component being replaced, to avoid functional incompatibility.
Documentation and similar products
Detailed technical data, installation instructions and datasheets for this model are available in the Siemens technical documentation. We also encourage you to browse the rest of our range – see other automation components at RECOSTOCK.
Frequently asked questions (FAQ)
Is the part number shown in the photos original and complete?
Yes, the full number 3UG4615-2CR20 is visible in three places: on the front label, on the side nameplate, and on the packaging, which allows unambiguous identification.
What does new-old-stock status mean?
It means the product is brand new (factory new) and unused, sourced from a distributor's or manufacturer's surplus stock – not from the secondary market or equipment teardowns.
Has the relay ever been installed?
Based on the available photos, there are no signs of installation, corrosion, or mechanical damage – the device appears unused.
Is a VAT invoice included with the shipment?
Yes, we issue a VAT invoice for every transaction – please confirm delivery and payment details before purchase.
How can I check compatibility with my installation?
Compare the full catalogue number of the Siemens 3UG4615-2CR20 monitoring relay with the marking in the technical documentation of your machine or control cabinet before ordering. If you have any questions, feel free to contact our RECOSTOCK team.
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