| 100BASE-FX | A physical medium defined in the IEEE 802.3 Ethernet standard for local area networks (LANs) that uses fiber optic cabling | |
| 100BASE-TX | A physical medium defined in the IEEE 802.3 Ethernet standard for local area networks (LANs) that uses twisted-pair cabling category 5 or higher with RJ-45 connectors | |
| AC | Alternating current | |
| ACT |
1. Application Configuration tool in PCM600 2. Trip status in IEC 61850 |
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| CAT 5 | A twisted pair cable type designed for high signal integrity | |
| COMTRADE | Common format for transient data exchange for power systems. Defined by the IEEE Standard. | |
| CPU | Central processing unit | |
| CSV | Comma-separated values | |
| CT | Current transformer | |
| DAN | Doubly attached node | |
| DC |
1. Direct current 2. Disconnector 3. Double command |
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| DHCP | Dynamic Host Configuration Protocol | |
| DPC | Double-point control | |
| DST | Daylight-saving time | |
| EEPROM | Electrically erasable programmable read-only memory | |
| EMC | Electromagnetic compatibility | |
| Ethernet | A standard for connecting a family of frame-based computer networking technologies into a LAN | |
| FB | Function block | |
| FIFO | First in, first out | |
| FPGA | Field-programmable gate array | |
| FTP | File transfer protocol | |
| FTPS | FTP Secure | |
| GOOSE | Generic Object-Oriented Substation Event | |
| HMI | Human-machine interface | |
| HSR | High-availability seamless redundancy | |
| HTTPS | Hypertext Transfer Protocol Secure | |
| HW | Hardware | |
| IEC | International Electrotechnical Commission |
| IEC 60870-5-103 |
1. Communication standard for protective equipment 2. A serial master/slave protocol for point-to-point communication |
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| IEC 61850 | International standard for substation communication and modeling | |
| IEC 61850-8-1 | A communication protocol based on the IEC 61850 standard series | |
| IEC 61850-9-2 | A communication protocol based on the IEC 61850 standard series | |
| IEC 61850-9-2 LE | Lite Edition of IEC 61850-9-2 offering process bus interface | |
| IED | Intelligent electronic device | |
| IEEE 1686 | Standard for Substation Intelligent Electronic Devices' (IEDs') Cyber Security Capabilities | |
| IP address | A set of four numbers between 0 and 255, separated by periods. Each server connected to the Internet is assigned a unique IP address that specifies the location for the TCP/IP protocol. | |
| IRF |
1. Internal fault 2. Internal relay fault |
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| LAN | Local area network | |
| LC | Connector type for glass fiber cable, IEC 61754-20 | |
| LCP | Liquid crystal polymer | |
| LCT | Life cycle traceability | |
| LE | Light Edition | |
| LED | Light-emitting diode | |
| LHMI | Local human-machine interface | |
| MMS |
1. Manufacturing message specification 2. Metering management system |
|
| NCC | Network control center | |
| OTP | One-time password | |
| PA | Polyamide | |
| PBT | Polybutylene terephthalate | |
| PC |
1. Personal computer 2. Polycarbonate |
|
| PCM600 | Protection and Control IED Manager | |
| PRP | Parallel redundancy protocol | |
| PTP | Precision Time Protocol | |
| R/L | Remote/Local | |
| RAM | Random access memory | |
| RJ-45 | Galvanic connector type | |
| RoHS | Restriction of hazardous substances | |
| ROM | Read-only memory | |
| RTC | Real-time clock | |
| SAN | Single attached node |
| SCL | XML-based substation description configuration language defined by IEC 61850 | |
| SMT | Signal Matrix tool in PCM600 | |
| SMU615 | Substation merging unit | |
| SMV | Sampled measured values | |
| STP | Shielded twisted-pair | |
| SVG | Scalable vector graphics | |
| SW | Software | |
| TCP/IP | Transmission Control Protocol/Internet Protocol | |
| UTC | Coordinated universal time | |
| VT | Voltage transformer | |
| WAN | Wide area network | |
| WHMI | Web human-machine interface | |
| XRIO | eXtended Relay Interface by OMICRON |