Symbol catalogue
The Electrification symbol list contains 78 symbols in 8 categories. The role decides how a symbol behaves in the network: whether it switches, transforms, feeds, consumes or only shows information. Indicator symbols have no terminals and do not take part in the network; bind their signals to the busbar or VT they belong to. For your own symbols, see User-defined electrical symbols.
The ANSI and IEC 61850 columns show the usual designations and are also searchable in the symbol list.
Switching & cells
| Symbol | Id | Role | ANSI | IEC 61850 |
|---|---|---|---|---|
| Circuit breaker | cb | Switch | 52 | XCBR + CSWI |
| Draw-out circuit breaker (truck) | cbd | Switch | 52 (draw-out) | XCBR + CSWI (position: GGIO / Pos) |
| Disconnector (isolator) | ds | Switch | 89 | XSWI + CSWI + CILO (interlock) |
| Load break switch | lbs | Switch | 89 (load break) / LBS | XSWI |
| Switch-fuse | fsw | Switch | FU + 89 | XSWI |
| 3-position switch (RMU: open-closed-earthed) | ts3 | 3-position switch | 89 / 89E | XSWI (3 positions) |
| Earthing switch | es | Earthing | 89E / 89G | XSWI (earthing) |
| Auto-recloser | rec | Switch | 79 (+52) | RREC + XCBR |
| Fuse (HRC) | fu | Fuse | FU | — (with XSWI) |
| Contactor | con | Switch | 42 | XSWI / CSWI |
| Ring main unit (RMU) – 2 ring + 1 transformer feeder | rmu | RMU | 89 + 89E · FU | XSWI ×3 + CILO |
Transformers, reactors & resistors
| Symbol | Id | Role | ANSI | IEC 61850 |
|---|---|---|---|---|
| Power transformer (2-winding + OLTC) | tr2 | Transformer | 87T · 49 · 63 · 90 (OLTC) | YPTR + YLTC (+ ATCC) |
| Three-winding transformer | tr3 | Transformer | 87T · 49 · 63 | YPTR (3 windings) + YLTC |
| Autotransformer | atr | Transformer | 87T · 49 · 63 | YPTR (+YLTC) |
| Distribution transformer (Dyn11) | dyn | Transformer | 49 · 63 · 87T | YPTR |
| Rectifier / traction transformer (12-pulse) | rtr | Transformer | 49 · 63 · 87T · 50/51 | YPTR |
| Line / shunt reactor | reac | Series element | 87 · 49 | ZREA |
| Neutral grounding resistor (NGR) | ngr | Shunt | 51N / 51G · 59N | ZREA/ZRES (neutral) · PTOC |
| Petersen coil (arc suppression) | pet | Shunt | 64 · 59N · 51N | YEFN |
| Zigzag earthing transformer | zz | Shunt | 51N · 64 | YPTR (earthing) |
Measurement, protection & sensors
| Symbol | Id | Role | ANSI | IEC 61850 |
|---|---|---|---|---|
| Current transformer (CT) | ct | Series element | CT | TCTR |
| Voltage transformer (VT / PT) | vt | Shunt | VT / PT | TVTR |
| Capacitive voltage transformer (CVT) | cvt | Shunt | CVT / CCVT | TVTR |
| Multifunction protection relay (IED) | ied | Indicator (not in the network) | 50/51 · 67N · 87 · 21 · 27/59 · 81 | PTOC · PDIF · PDIS · PTUV/PTOV · PFRC |
| Synchrocheck | syn | Indicator (not in the network) | 25 | RSYN (CSYN: synchroniser) |
| Power meter / PMU | mtr | Indicator (not in the network) | M (measurement) | MMXU · MMTR · MHAI · MSQI |
| Surge arrester | sa | Shunt | SA | ZSAR |
| Buchholz / gas-pressure relay | buc | Indicator (not in the network) | 63 | SPTR (transformer monitoring) |
| Temperature indicator (winding / oil) | tmp | Indicator (not in the network) | 49 | STMP |
| Arc flash relay | arc | Indicator (not in the network) | AFD (vendor specific) | SARC |
| Flood sensor | flood | Indicator (not in the network) | — | GGIO (generic I/O) |
| Fire detector | fire | Indicator (not in the network) | — | GGIO |
| Door / intrusion contact | door | Indicator (not in the network) | — | GGIO |
| Energy meter (kWh / tariff meter) | kwh | Series element | — (metering: not 32/55, a meter) | MMTR (+ MMXU) |
Power electronics & storage
| Symbol | Id | Role | ANSI | IEC 61850 |
|---|---|---|---|---|
| Inverter (DC/AC, PV) | inv | Converter | — | ZINV |
| Bidirectional PCS (BESS converter) | pcs | Converter | — | ZCON / ZINV |
| Rectifier (AC/DC) | rect | Converter | — | ZRCT |
| DC/DC converter | dcdc | Converter | — | ZCON |
| Variable frequency drive (VFD) | vfd | Converter | — | ZCON (+ZMOT) |
| Automatic transfer switch (ATS) | ats | Transfer (ATS) | 83 | XSWI (+ CSWI) |
| Harmonic filter / detuned capacitor | sf | Shunt | — | ZCAP + ZREA |
| Capacitor bank (reactive power) | cap | Shunt | — | ZCAP |
| STATCOM / SVC | stc | Shunt | — | ZCON (STATCOM) · ZTCR (SVC) |
| DC fast EV charger | evc | Load | — | IEC 61851 / ISO 15118 (IEC 61850-90-8 EV) |
| Battery bank / BESS | bat | Source | — | ZBAT (+ ZBTC charging) |
Generation & load
| Symbol | Id | Role | ANSI | IEC 61850 |
|---|---|---|---|---|
| Synchronous generator | gen | Source | — | ZGEN |
| MV induction motor | mot | Load | — | ZMOT |
| PV array | pv | Source | — | DPVA · DPVC (IEC 61850-7-420) |
| Wind turbine | wt | Source | — | WTUR · WROT · WGEN (IEC 61400-25) |
| Hydro turbine-generator | hyd | Source | — | ZGEN + IEC 61850-7-410 (hydro) |
| Load | ld | Load | — | — (measurement: MMXU) |
| Grid supply (equivalent source) | src | Source | 27 / 59 / 81 | ZLIN / ZAXN (source) · MMXU |
Lines, busbars & cables
| Symbol | Id | Role | ANSI | IEC 61850 |
|---|---|---|---|---|
| Busbar | bus | Busbar | 87B (busbar differential) | — (topology) · measurement with TVTR |
| Double busbar (Bus-1 / Bus-2) | bus2 | Busbar | 87B | — · CILO (busbar selection interlock) |
| Overhead line / tower | oh | Load | 21 · 67 · 87L · 79 | ZLIN |
| Underground cable (XLPE) | cab | Series element | 51 · 87L | ZCAB |
| Cable termination | cte | Series element | — | ZCAB · SPDC (partial discharge) |
| Line trap (wave trap) | lt | Series element | — | — |
| Outgoing feeder (arrow) | fdr | Load | — | — |
| Junction | jn | Junction | — | — |
| Crossover (not connected) | xo | Crossover | — | — |
| Off-page / voltage label (LV-MV) | off | Off-page connector | — | — |
Rail traction
| Symbol | Id | Role | ANSI | IEC 61850 |
|---|---|---|---|---|
| DC high-speed circuit breaker (HSCB) | hscb | Switch | 72 (DC breaker) · 76 (DC overcurrent) | XCBR (DC) + CSWI |
| Catenary / overhead contact line (OCS) | cat | Busbar | — | ZLIN |
| Third rail + running rail | trd | Busbar | — | ZLIN |
| Pantograph / vehicle collector | pan | Load | — | — |
| Catenary sectioning switch | ssw | Switch | 89 | XSWI + CSWI |
| Neutral section / section insulator | ins | Insulator | — | — |
| Voltage limiting device (VLD) | vld | Shunt | 64 (earth) / EN 50122-1 VLD | XSWI / ZSAR (related) |
Control & auxiliary
| Symbol | Id | Role | ANSI | IEC 61850 |
|---|---|---|---|---|
| RTU / field gateway | rtu | Indicator (not in the network) | — | LLN0 / LPHD (physical device) |
| UPS (uninterruptible power supply) | ups | Indicator (not in the network) | — | ZRCT + ZBAT + ZINV |
| 110 V DC rectifier (charger) | red | Indicator (not in the network) | — | ZRCT + ZBTC |
| Local / remote selector (L/R) | lr | Indicator (not in the network) | 43 (manual transfer) | CSWI.Loc / LLN0.Loc |
| Tag-out / lock | tag | Indicator (not in the network) | — | — (SCADA blocking tag) |
| Alarm tile (annunciator) | ann | Indicator (not in the network) | 30 (annunciator) | GAPC / alarm list |
| Measurement box (LCD telemetry) | mbox | Indicator (not in the network) | — | MMXU / MMTR (value + quality) |
| Uncertain voltage / data warning | warn | Indicator (not in the network) | — | Quality = invalid / questionable |
| Voltage conflict | conf | Indicator (not in the network) | 25 (synchronism) · 78 · 81 | RSYN / alarm |