Overview
Manuals
Overvoltage and undervoltage relay Function
ABB Electrical Compatibility
Commissioning Checks
Features:
- SPAU 121 C-AA identifies the complete ABB product required for exact-item verification.
- The unit performs the documented Overvoltage and undervoltage relay role within the ABB Electrical product family.
- Selection depends on matching the installed interfaces, connected equipment and approved configuration.
SPAU 121 C-AA is an ABB Overvoltage and undervoltage relay selected by its complete product identity and documented equipment role. Suitability depends on the installed ABB Electrical hardware, interfaces and application requirements matching the supplied unit.
Before replacement, record the nameplate, installed position, connector or terminal arrangement and paired assemblies. After installation, verify every affected power, communication, protection, control or I/O function before returning the equipment to service.
The SPAU 121 C-AA ABB Overvoltage and undervoltage relay is listed as Obsolete/Discontinued by OEM. Current revision, availability and supplied scope are confirmed in the written quotation.
ABB SPAU 121 C-AA documentation and reference links.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
SPAU 121 C-AA performs the documented Overvoltage and undervoltage relay function within the ABB Electrical product family. Confirm power, signal, communication and mechanical interfaces against the approved equipment record; the complete label and hardware execution control selection.
Replacement of SPAU 121 C-AA requires a verified match to the receiving ABB Electrical hardware, connected assemblies and configuration record. Record the installed position and connections before removal, preserve required settings, and verify every affected function after installation.
Before energizing SPAU 121 C-AA, inspect mounting, connector keying, terminal allocation, protective grounding and paired equipment. After startup, review diagnostics and complete controlled functional tests before returning the equipment to service.
