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Description
Application Scenarios:At a large data center campus, a fault on a critical 12kV feeder supplying a server hall caused a cascade failure. The legacy electromechanical overcurrent relays protecting the feeder operated correctly, but they lacked coordination with upstream devices and provided no data on the fault’s nature or location. This led to an unnecessary trip of a main incoming breaker, blacking out the entire hall for 45 minutes, resulting in massive data loss and service downtime. The facility engineers undertook a full upgrade, installing new switchgear bays equipped with the ABB REF542plus 1VCF752000 Feeder Terminal. Just months later, a cable fault occurred on a different feeder. This time, the 1VCF752000 unit performed perfectly. Its advanced directional overcurrent protection correctly identified and isolated only the faulty feeder. Crucially, its integrated event recorder and fault locator provided precise data: the fault was 153 meters from the substation, and the oscillographic record showed it was a Phase-to-Ground fault. Maintenance crews were dispatched directly to the exact manhole, finding and repairing a damaged cable section in under two hours, while the rest of the data center remained fully operational. The ABB REF542plus 1VCF752000 transformed a disruptive outage into a localized, quickly resolved incident, proving its value in mission-critical power distribution.
Parameter:
| Main Parameter | Value / Description |
|---|---|
| Product Model | ABB REF542plus 1VCF752000 |
| Manufacturer | ABB |
| Product Category | Feeder Terminal Unit / Integrated Protection & Control IED |
| Rated Voltage | Up to 15 kV (for associated VT/CT inputs) |
| Rated Current (In) | 1A or 5A (configurable for connected Current Transformers) |
| Protection Functions | Overcurrent (I>, I>>), Earth Fault (Io>, Io>>), Directional Protection, Thermal Overload, Breaker Failure, etc. |
| Control Functions | Bay control (open/close), interlocking, sequence control, synchrocheck. |
| Measurement | V, I, P, Q, PF, Freq., Energy (with integrated power quality metrics). |
| Communication | Multiple ports: Ethernet (IEC 61850, Modbus TCP), RS485 (Modbus RTU, DNP3). |
| HMI | Large graphical LCD display, keypad, and LED indicators for local interface. |
| Inputs/Outputs | Multiple binary inputs (status) and relay outputs (commands, alarms). |
| Standards | IEC 60255, IEC 61850, IEEE, etc. |
