User manual for ABB REF 541/543/545 feeder protection terminals covering protection, control, measurement, and communication functions.
This document is the user guide for the ABB REF 541, REF 543, and REF 545 feeder protection terminals. These devices are designed for protection, control, measurement, and monitoring in medium-voltage power grids. They support various network configurations and grounding systems, including ungrounded, resonant, and small resistance grounded systems. The terminals also provide functions for motor protection, capacitor bank control, and fault location. This manual is written in Chinese.
| Display | 17x19 line large LCD graphic screen |
|---|---|
| Sampling Frequency (60Hz) | 2.4 kHz |
| Harmonic Measurement | up to 13th harmonic |
| Pulse Count Inputs (REF 541) | 7 |
| Pulse Count Inputs (REF 545) | 10 |
| Fault Recording Channels | 16 current or voltage waveforms |
| Temperature Alarm Threshold | +78℃ |
The difference lies in the number of digital inputs and outputs for each model.
The terminal supports IEC 60870-5-103, IEC 61850, Profibus-DPV1, SPA, LON, DNP 3.0, and Modbus.
Yes, it can measure voltage and current total harmonic distortion (THD) up to the 13th harmonic.