Description
🔹 Product Description
The ABB SMU615 SMU615HBABBA1AN21G is a Relion 615 series substation merging unit designed for digital substation and medium-voltage switchgear applications. It provides the interface between primary switchgear equipment and protection/control devices by measuring current and voltage signals from conventional instrument transformers or compatible sensors and converting them into standardized digital process-bus data.
SMU615 supports IEC 61850-9-2 LE sampled measured values, fast GOOSE communication, redundant Ethernet architectures, and IEEE 1588 V2 time synchronization. ABB describes it as a dedicated merging unit rather than a protection relay, with a compact withdrawable design intended for switchgear integration.
Product Keywords: ABB SMU615, SMU615HBABBA1AN21G, Relion SMU615, ABB Substation Merging Unit, IEC 61850 Merging Unit, IEC 61850-9-2 LE, Process Bus, Digital Substation, ABB Relion 615, Medium Voltage Switchgear
ABB Protection & Automation Spare Parts
SMU615HBABBA1AN21G
🔹 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | ABB |
| Model | SMU615 |
| Ordering Code | SMU615HBABBA1AN21G |
| Series | Relion 615 |
| Product Type | Substation Merging Unit |
| Application | Digital Substation / MV Switchgear |
| Measurement | Current and Voltage |
| Process Bus | IEC 61850-9-2 LE |
| Communication | Ethernet / IEC 61850 |
| Time Synchronization | IEEE 1588 V2 |
| Design | Withdrawable Plug-in Unit |
| Protection Function | No dedicated protection functionality |
🔹 Application
The SMU615 is used to digitize electrical measurements at the switchgear level and transfer them to protection and control equipment through a standardized process-bus architecture. ABB states that it can interface with both conventional CT/VT inputs and sensor inputs.
The unit can also support redundant Ethernet communication using HSR and PRP, making it suitable for digital substation architectures where process-bus communication and high-accuracy time synchronization are required.
🔹 Replacement Notes
For replacement, verify the complete ordering code SMU615HBABBA1AN21G, hardware configuration, CT/VT or sensor interface, communication arrangement, firmware version, and existing IEC 61850 engineering configuration.
Because SMU615 ordering codes encode different hardware and interface configurations, another SMU615 variant should not automatically be treated as a direct replacement. ABB also provides dedicated connectivity packages and firmware releases for SMU615.
🔹 Related ABB Models
- ABB RIO600
- ABB REF615
- ABB REB615
- ABB REM615
- ABB RET615
- ABB REC615
- ABB REG615
- ABB RED615
- ABB REL615
- ABB REX615
