| ACC | Actual channel, related to IEC 60870-5-103 disturbance record | |
| ACK | Positive acknowledgement | |
| ACT |
1. Application Configuration tool in PCM600 2. Trip status in IEC 61850 |
|
| ASCII | American Standard Code for Information Interchange | |
| ASDU | Application-layer service data unit | |
| CB | Circuit breaker | |
| COMTRADE | Common format for transient data exchange for power systems. Defined by the IEEE Standard. | |
| COT | Cause of transmission | |
| Data set | The content basis for reporting and logging containing references to the data and data attribute values | |
| DFC | Data flow control | |
| DPI | Double-point information | |
| EIA-485 | Serial communication standard according to Electronics Industries Association. | |
| EMC | Electromagnetic compatibility | |
| FAN | Fault number | |
| FUN | Function type | |
| GI | General interrogation | |
| HMI | Human-machine interface | |
| IEC | International Electrotechnical Commission | |
| IEC 60870-5-101 | Companion standard for basic telecontrol tasks | |
| IEC 60870-5-103 |
1. Communication standard for protective equipment 2. A serial master/slave protocol for point-to-point communication |
|
| IEC 60870-5-104 | Network access for IEC 60870-5-101 | |
| IEC 61850 | International standard for substation communication and modeling | |
| IED | Intelligent electronic device | |
| INF | Information number | |
| LED | Light-emitting diode | |
| LHMI | Local human-machine interface | |
| LSB | Least significant bit | |
| MSB | Most significant bit | |
| NAK | Negative acknowledgement | |
| NCC | Network control center | |
| OTEV | Disturbance recording triggered from start bit | |
| PCM600 | Protection and Control IED Manager | |
| Reset CU | Reset communication unit | |
| Reset FCB | Reset flow control bit | |
| SOF | Status of fault | |
| SW | Software | |
| TEST | Disturbance data recorded in test mode bit | |
| TM | Disturbance data transmission in progress bit | |
| TP | Disturbance data recorded with or without trip bit | |
| VDEW6 | Communication protocol standard for protection devices | |
| VSQ | Variable structure qualifier | |
| WHMI | Web human-machine interface |