EPLAN P8 — Panel Builder Designation Reference Guide
| Specialized for: MV Switchgear | LV Switchgear | MCC | Distribution Boards | Ring Main Units | Busbars | Transformers | UPS | Capacitor Banks | Soft Starters | VFD Panels | Control Panels | Marshalling Cabinets | Junction Boxes |
Table of Contents
- Fundamentals for Panel Builders
- Naming Philosophy
- MV Switchgear (Medium Voltage)
- LV Main Switchboard (MSB)
- Motor Control Centre (MCC)
- Distribution Boards (DB)
- Ring Main Unit (RMU)
- Busbar Trunking System (BTS)
- Power Transformers (Dry Type / Oil)
- UPS Systems
- Automatic Transfer Switch (ATS)
- Power Factor Correction / Capacitor Banks
- VFD / Drive Panels
- Soft Starter Panels
- Control Panels (PLC / Relay Logic)
- Motor Control Panels (standalone)
- Marshalling Cabinets
- Instrumentation Cabinets
- Protection & Metering Panels
- Battery & DC Panels
- Emergency & Essential Boards
- Junction Boxes & Field Enclosures
- Busbar Chambers & Interconnections
- Operator Stations & HMI Panels
- Complete Single-Line Examples
- IEC Standards Quick Reference
- Common Mistakes for Panel Builders
- Expert Tips for Panel Builders
Fundamentals for Panel Builders
EPLAN Structure for Panel Work
1
2
3
| = Function → What the panel/device does
+ Location → The panel or enclosure itself
- Device → The component inside the panel
|
The Panel Builder’s Primary Focus
For panel builders, the + location IS the panel. Most work lives at:
1
2
3
| +PANEL_NAME The panel as a location
+PANEL_NAME.SECTION A section within the panel
+PANEL_NAME.SECTION.COMP A compartment within a section
|
Typical Panel Builder Tag Structure
1
2
3
4
| =PWR+MSB1-Q1 Main incomer breaker Q1 in MSB1
=CTRL+MCC1.SEC_A-K5 Control relay K5 in section A of MCC1
=METER+MSB1.METER-PQ1 Power analyser PQ1 in metering section of MSB1
=SAFE+MCC1-F3 Motor protection relay F3 in MCC1
|
Naming Philosophy
Option A — Descriptive (most common for panel shops)
1
2
3
4
5
6
| +MSB1 Main switchboard 1
+MCC1 Motor control centre 1
+DB_L1 Distribution board level 1
+RMU1 Ring main unit 1
+VFD_PNL1 VFD panel 1
+CP1 Control panel 1
|
Option B — Alphanumeric (common for large projects)
1
2
3
4
5
| +SW01 Switchboard 01
+MC01 MCC 01
+DB01 Distribution board 01
+RM01 RMU 01
+CP01 Control panel 01
|
Option C — Client Asset Code (matches client register)
1
2
3
| +11KV-SW-01 Client's 11kV switchboard tag
+415V-MCC-01 Client's 415V MCC tag
+DB-B1-L01 Client's DB tag for building 1 level 1
|
Expert rule: Always ask the client for their naming convention before starting. If none exists, use Option A with consistent abbreviations agreed at kick-off.
MV Switchgear (Medium Voltage)
Voltage range: typically 3.3kV, 6.6kV, 11kV, 22kV, 33kV Standards: IEC 62271-200, IEC 62271-100
Function Designations
1
2
3
4
5
6
7
8
9
10
11
12
| =MV MV switchgear system (general)
=MV.INC Incoming feeder function
=MV.BUS Busbar function
=MV.TIE Bus section / tie function
=MV.FDR Outgoing feeder function
=MV.TX Transformer feeder function
=MV.MOTOR MV motor feeder function
=MV.CAP Capacitor bank feeder function
=MV.GEN Generator incomer function
=MV.METERING Metering function
=MV.PROT Protection function
=MV.EARTH Earthing switch function
|
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
| +MV_SW1 MV switchboard 1 (top level)
+MV_SW1.INC_1 Incoming panel 1
+MV_SW1.INC_2 Incoming panel 2 (dual incomer)
+MV_SW1.BUS_SEC Bus section panel
+MV_SW1.TIE Bus tie panel
+MV_SW1.FDR_1 Feeder panel 1
+MV_SW1.FDR_2 Feeder panel 2
+MV_SW1.FDR_3 Feeder panel 3
+MV_SW1.FDR_4 Feeder panel 4
+MV_SW1.TX_FDR1 Transformer feeder panel 1
+MV_SW1.TX_FDR2 Transformer feeder panel 2
+MV_SW1.MTR_FDR1 MV motor feeder panel 1
+MV_SW1.MTR_FDR2 MV motor feeder panel 2
+MV_SW1.CAP_FDR1 Capacitor bank feeder panel 1
+MV_SW1.METER Metering panel / VT panel
+MV_SW1.PROT Protection relay panel (if separate)
+MV_SW1.CABLE_BOX Cable termination box (rear)
+MV_SW1.CTRL_WIRING Control wiring duct / space
|
Full Tag Examples — MV Switchgear
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
| =MV.INC+MV_SW1.INC_1-QB1 VCB (vacuum circuit breaker) in incoming panel 1
=MV.INC+MV_SW1.INC_1-ES1 Earthing switch in incoming panel 1
=MV.INC+MV_SW1.INC_1-CT1 Current transformer in incoming panel 1
=MV.INC+MV_SW1.INC_1-VT1 Voltage transformer in incoming panel 1
=MV.INC+MV_SW1.INC_1-F1 Protection relay (overcurrent/earth fault)
=MV.INC+MV_SW1.INC_1-PQ1 Power analyser / metering relay
=MV.TIE+MV_SW1.BUS_SEC-QB_TIE Bus section VCB
=MV.TIE+MV_SW1.BUS_SEC-ES_TIE Bus section earthing switch
=MV.FDR+MV_SW1.FDR_1-QB1 Feeder VCB in feeder panel 1
=MV.FDR+MV_SW1.FDR_1-F1 Feeder protection relay
=MV.TX+MV_SW1.TX_FDR1-QB1 Transformer feeder VCB
=MV.TX+MV_SW1.TX_FDR1-F1 Transformer protection relay (REF, overcurrent)
=MV.MOTOR+MV_SW1.MTR_FDR1-QB1 MV motor starter VCB
=MV.MOTOR+MV_SW1.MTR_FDR1-F1 Motor protection relay
=MV.METER+MV_SW1.METER-VT1 Metering VT panel
=MV.METER+MV_SW1.METER-KWH1 kWh meter (fiscal / check metering)
|
MV Switchgear Internal Device Naming (common)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
| QB Vacuum/SF6 circuit breaker
QD Disconnector / isolator
ES Earthing switch
CT Current transformer
VT Voltage transformer (potential transformer)
F Protection relay (general)
F_OC Overcurrent relay
F_EF Earth fault relay
F_DIFF Differential relay
F_DIST Distance relay
F_REF Restricted earth fault relay
PQ Power quality / power analyser
KWH Energy meter
K Auxiliary relay
X Terminal block
HL Indicating lamp
SB Push button
SS Selector switch
|
LV Main Switchboard (MSB)
Voltage: 400V / 415V / 690V AC Standards: IEC 61439-1, IEC 61439-2 (formerly IEC 60439)
Function Designations
1
2
3
4
5
6
7
8
9
10
| =PWR Power distribution (general)
=PWR.INC Incoming supply function
=PWR.BUS Busbar function
=PWR.TIE Bus tie / coupler function
=PWR.FDR Outgoing feeder function
=PWR.EMERG Emergency / essential supply
=METER Metering and power quality
=PROT Protection function
=CTRL Control and interlocking
=SAFE Safety and interlocking
|
1
2
3
4
5
6
| +MSB1 Main switchboard 1
+MSB1.INC Incoming section
+MSB1.BUS Busbar section
+MSB1.TIE Bus tie section
+MSB1.FDR Outgoing feeders section
+MSB1.METER Metering section
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
| +MSB1 Main switchboard 1
+MSB1.INC_A Incomer A (left incomer)
+MSB1.INC_B Incomer B (right incomer / generator)
+MSB1.BUS_A Busbar chamber A
+MSB1.BUS_B Busbar chamber B
+MSB1.TIE Bus coupler section
+MSB1.FDR_1 Feeder 1 compartment
+MSB1.FDR_2 Feeder 2 compartment
+MSB1.FDR_3 Feeder 3 compartment
+MSB1.FDR_4 Feeder 4 compartment
+MSB1.FDR_5 Feeder 5 compartment
+MSB1.FDR_6 Feeder 6 compartment
+MSB1.MCC_FDR1 MCC feeder compartment 1
+MSB1.MCC_FDR2 MCC feeder compartment 2
+MSB1.DB_FDR1 DB feeder compartment 1
+MSB1.DB_FDR2 DB feeder compartment 2
+MSB1.TRANS_FDR1 Transformer feeder (dry-type LV-LV)
+MSB1.UPS_FDR UPS feeder compartment
+MSB1.GEN_FDR Generator incomer compartment
+MSB1.ATS ATS / changeover section
+MSB1.METER Metering compartment
+MSB1.CTRL Control and indication compartment
+MSB1.BUSDUCT Busduct / busbar trunking connection point
|
Full Tag Examples — MSB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
| =PWR.INC+MSB1.INC_A-QF_INC_A Main incomer MCCB/ACB incomer A
=PWR.INC+MSB1.INC_A-CT1 Incomer A current transformer
=PWR.INC+MSB1.INC_A-VT1 Incomer A voltage transformer
=METER+MSB1.INC_A-PQ1 Power analyser on incomer A
=PWR.TIE+MSB1.TIE-QF_TIE Bus coupler ACB
=PWR.FDR+MSB1.FDR_1-QF1 Feeder 1 MCCB
=PWR.FDR+MSB1.FDR_1-CT1 Feeder 1 CT (if metered)
=CTRL+MSB1.CTRL-K_INC_A Incomer A auxiliary relay
=CTRL+MSB1.CTRL-K_TIE Bus tie interlock relay
=SAFE+MSB1.CTRL-K_ATS ATS changeover relay
=METER+MSB1.METER-PQ_MAIN Main power quality analyser
=METER+MSB1.METER-KWH_MAIN Main energy meter
=CTRL+MSB1.INC_A-SS_LOCAL Local/remote selector switch
=CTRL+MSB1.INC_A-HL_CLOSED Breaker closed indicator lamp
=CTRL+MSB1.INC_A-HL_OPEN Breaker open indicator lamp
=CTRL+MSB1.INC_A-HL_TRIP Breaker trip indicator lamp
=CTRL+MSB1.INC_A-SB_CLOSE Breaker close push button
=CTRL+MSB1.INC_A-SB_OPEN Breaker open push button
=CTRL+MSB1.INC_A-SB_RESET Breaker reset push button
|
Two-Incomer + Bus Tie (2i+BT) MSB — common layout
1
2
3
4
5
6
7
8
9
10
11
12
13
| +MSB1.INC_A Incomer A (utility supply)
+MSB1.INC_B Incomer B (generator / second utility)
+MSB1.TIE Bus tie coupler
+MSB1.BUS_A Busbar section A
+MSB1.BUS_B Busbar section B
+MSB1.FDR_A1 Feeder on bus A — position 1
+MSB1.FDR_A2 Feeder on bus A — position 2
+MSB1.FDR_A3 Feeder on bus A — position 3
+MSB1.FDR_B1 Feeder on bus B — position 1
+MSB1.FDR_B2 Feeder on bus B — position 2
+MSB1.FDR_B3 Feeder on bus B — position 3
+MSB1.CTRL Control and interlocking section
+MSB1.METER Metering section
|
Motor Control Centre (MCC)
Standards: IEC 61439-1, IEC 61439-2, IEC 60947-4 Draw-out or fixed type. Fixed plug-in (FPI) or withdrawable.
Function Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| =PWR Power distribution through MCC
=PWR.INC MCC incomer function
=PWR.BUS MCC busbar function
=MOTOR Motor feeder / starter function
=MOTOR.DOL Direct-on-line starter function
=MOTOR.STAR_D Star-delta starter function
=MOTOR.VFD Variable frequency drive function
=MOTOR.SOFT Soft starter function
=MOTOR.RDOL Reversing DOL function
=CTRL Control section function
=SAFE Motor protection function
=METER Motor / feeder metering
=HEAT Enclosure heating function
=LIGHT Panel lighting function
|
Location Designations — MCC Structure
Vertical Section Based (most common)
1
2
3
4
5
6
7
8
| +MCC1 MCC 1 (top level)
+MCC1.INC Incoming section (usually leftmost)
+MCC1.SEC_1 Vertical section 1
+MCC1.SEC_2 Vertical section 2
+MCC1.SEC_3 Vertical section 3
+MCC1.SEC_4 Vertical section 4
+MCC1.SEC_5 Vertical section 5
+MCC1.CTRL_SEC Control / PLC section (if integrated)
|
Within a Vertical Section — Compartment / Drawer Level
1
2
3
4
5
6
7
| +MCC1.SEC_1.C01 Compartment 01 in section 1 (top)
+MCC1.SEC_1.C02 Compartment 02 in section 1
+MCC1.SEC_1.C03 Compartment 03 in section 1
+MCC1.SEC_1.C04 Compartment 04 in section 1
+MCC1.SEC_1.C05 Compartment 05 in section 1 (bottom)
+MCC1.SEC_1.CABLE_SPACE Cable compartment in section 1
+MCC1.SEC_1.BUS Busbar compartment in section 1
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| +MCC1 MCC 1
+MCC1.INC Incoming section
+MCC1.M01 Motor feeder 01 (for motor M01)
+MCC1.M02 Motor feeder 02
+MCC1.M03 Motor feeder 03
+MCC1.M04 Motor feeder 04
+MCC1.M05 VFD feeder for motor M05
+MCC1.M06 Soft starter feeder for motor M06
+MCC1.P01 Pump P01 feeder
+MCC1.P02 Pump P02 feeder
+MCC1.FAN01 Fan 01 feeder
+MCC1.COMP01 Compressor 01 feeder
+MCC1.CTRL PLC / controls drawer
+MCC1.DIST 24VDC distribution section
|
Full Tag Examples — MCC (DOL Starter)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
| =PWR.INC+MCC1.INC-QF_INC MCC incomer MCCB
=PWR.INC+MCC1.INC-CT1 Incomer CT
=METER+MCC1.INC-PQ1 Incomer power analyser
=MOTOR.DOL+MCC1.M01-QF1 Motor M01 feeder MCCB
=MOTOR.DOL+MCC1.M01-F1 Motor M01 protection relay (overload/phase loss)
=MOTOR.DOL+MCC1.M01-KM1 Motor M01 main contactor
=MOTOR.DOL+MCC1.M01-KM1_AUX Motor M01 auxiliary contactor
=CTRL+MCC1.M01-SS_LOCAL Motor M01 local/remote selector
=CTRL+MCC1.M01-SB_START Motor M01 start push button
=CTRL+MCC1.M01-SB_STOP Motor M01 stop push button
=CTRL+MCC1.M01-HL_RUN Motor M01 run indication lamp
=CTRL+MCC1.M01-HL_TRIP Motor M01 trip indication lamp
=CTRL+MCC1.M01-HL_READY Motor M01 ready indication lamp
=SAFE+MCC1.M01-F1 Motor protection relay (thermal overload)
=METER+MCC1.M01-PQ1 Motor M01 individual power meter (if metered)
|
Full Tag Examples — MCC (Star-Delta Starter)
1
2
3
4
5
6
7
8
9
10
11
12
| =MOTOR.STAR_D+MCC1.M02-QF1 Star-delta feeder MCCB
=MOTOR.STAR_D+MCC1.M02-F1 Overload relay
=MOTOR.STAR_D+MCC1.M02-KM_MAIN Main contactor (line)
=MOTOR.STAR_D+MCC1.M02-KM_STAR Star contactor
=MOTOR.STAR_D+MCC1.M02-KM_DELTA Delta contactor
=MOTOR.STAR_D+MCC1.M02-KT1 Star-delta timer relay
=CTRL+MCC1.M02-SS_LOCAL Local/remote selector
=CTRL+MCC1.M02-SB_START Start push button
=CTRL+MCC1.M02-SB_STOP Stop push button
=CTRL+MCC1.M02-HL_STAR Star mode indicator
=CTRL+MCC1.M02-HL_DELTA Delta mode indicator
=CTRL+MCC1.M02-HL_TRIP Trip indicator
|
Full Tag Examples — MCC (VFD Drawer)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| =MOTOR.VFD+MCC1.M03-QF1 VFD incomer MCCB
=MOTOR.VFD+MCC1.M03-F1 Motor protection relay
=MOTOR.VFD+MCC1.M03-VFD1 Variable frequency drive unit
=MOTOR.VFD+MCC1.M03-QF_BP Bypass MCCB (if bypass fitted)
=MOTOR.VFD+MCC1.M03-KM_VFD VFD output contactor
=MOTOR.VFD+MCC1.M03-KM_BP Bypass contactor (if bypass fitted)
=MOTOR.VFD+MCC1.M03-EMC1 EMC filter / line reactor
=MOTOR.VFD+MCC1.M03-KS1 VFD/bypass interlock relay
=CTRL+MCC1.M03-SS_VFD_BP VFD / bypass selector switch
=CTRL+MCC1.M03-SS_LOCAL Local / remote selector
=CTRL+MCC1.M03-SB_START Start push button (local)
=CTRL+MCC1.M03-SB_STOP Stop push button (local)
=CTRL+MCC1.M03-HL_RUN Run indicator
=CTRL+MCC1.M03-HL_FAULT VFD fault indicator
|
MCC with Integrated PLC Section
1
2
3
4
5
6
7
| +MCC1.CTRL_SEC Control/PLC section (rightmost)
+MCC1.CTRL_SEC.PLC PLC mounting area
+MCC1.CTRL_SEC.DIST 24VDC distribution area
+MCC1.CTRL_SEC.IO I/O modules area
+MCC1.CTRL_SEC.RELAY Relay area
+MCC1.CTRL_SEC.TERM Terminal area
+MCC1.CTRL_SEC.COMM Communications / fieldbus modules
|
Distribution Boards (DB)
Standards: IEC 61439-3 (consumer DBs), IEC 61439-1/2 (industrial DBs)
Function Designations
1
2
3
4
5
6
7
8
9
| =PWR Power distribution
=PWR.INC Incomer function
=PWR.LIGHT Lighting circuit function
=PWR.POWER Power outlet circuit function
=PWR.HVAC HVAC circuit function
=PWR.EMERG Emergency circuit function
=PWR.SMALL_PWR Small power / data circuits
=METER Sub-metering function
=SAFE RCD / RCBO protection function
|
Location Designations — Types of Distribution Boards
Main Distribution Board (MDB)
1
2
3
4
5
6
7
8
9
| +MDB1 Main distribution board 1
+MDB1.INC Incomer section
+MDB1.BUS Busbar section
+MDB1.LIGHT Lighting circuits section
+MDB1.POWER Power circuits section
+MDB1.HVAC HVAC circuits section
+MDB1.EMERG Emergency circuits section
+MDB1.SPARES Spare ways section
+MDB1.METER Sub-meter section
|
Sub-Distribution Board (SDB)
1
2
3
4
5
6
7
8
9
10
| +SDB_L1 Sub DB for Level 1
+SDB_L1.INC Incomer (fed from MDB or riser)
+SDB_L1.LIGHT Lighting circuits
+SDB_L1.GPO General power outlets
+SDB_L1.HVAC FCU / VAV circuits
+SDB_L1.CRIT Critical / essential loads
+SDB_L2 Sub DB for Level 2
+SDB_L2.INC Incomer
+SDB_L2.LIGHT Lighting circuits
+SDB_L2.GPO General power outlets
|
Industrial / Process DB
1
2
3
4
5
6
7
8
9
10
11
| +IDB1 Industrial distribution board 1
+IDB1.INC Incomer MCCB / isolator
+IDB1.FDR_1 Feeder 1 (to panel CP1)
+IDB1.FDR_2 Feeder 2 (to panel CP2)
+IDB1.FDR_3 Feeder 3 (to JB1)
+IDB1.FDR_4 Feeder 4 (to field sockets)
+IDB1.FDR_5 Feeder 5 (to HVAC)
+IDB1.LIGHT Panel lighting circuit
+IDB1.HEAT Panel heating circuit
+IDB1.24VDC 24VDC SMPS and distribution
+IDB1.CTRL Control MCBs (PLC, HMI power)
|
Essential Distribution Board (EDB)
1
2
3
4
5
6
7
8
9
| +EDB1 Essential distribution board 1
+EDB1.INC_NORM Normal supply incomer (from MSB)
+EDB1.INC_EMERG Emergency supply incomer (from ATS/UPS/generator)
+EDB1.ATS Automatic transfer switch section
+EDB1.FDR_1 Essential feeder 1
+EDB1.FDR_2 Essential feeder 2
+EDB1.FDR_3 Essential feeder 3
+EDB1.UPS_FDR UPS-backed feeder
+EDB1.CRIT Critical / life safety circuits
|
Full Tag Examples — DB
1
2
3
4
5
6
7
8
9
10
11
| =PWR.INC+MDB1.INC-QF_INC Main incomer MCCB
=METER+MDB1.INC-KWH1 Main energy meter
=SAFE+MDB1.INC-RCD_MAIN Main RCD (if fitted)
=PWR.LIGHT+MDB1.LIGHT-MCB_L1 Lighting circuit 1 MCB
=PWR.LIGHT+MDB1.LIGHT-MCB_L2 Lighting circuit 2 MCB
=PWR.POWER+MDB1.POWER-MCB_P1 Power circuit 1 MCB
=PWR.POWER+MDB1.POWER-RCBO_P1 Power circuit 1 RCBO (RCD+MCB)
=PWR.HVAC+MDB1.HVAC-MCB_H1 HVAC circuit 1 MCB
=PWR.EMERG+MDB1.EMERG-MCB_E1 Emergency lighting circuit 1
=METER+MDB1.METER-KWH_LIGHT Lighting sub-meter
=METER+MDB1.METER-KWH_POWER Power sub-meter
|
Ring Main Unit (RMU)
Used for MV cable ring / radial distribution Standards: IEC 62271-200, IEC 62271-105 Common types: 2-way, 3-way, 4-way (2 ring + 1 transformer feeder + 1 spare)
Function Designations
1
2
3
4
| =MV.RING Ring circuit function
=MV.TX Transformer feeder function
=MV.METER Metering function
=MV.EARTH Earthing function
|
Location Designations — RMU
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
| +RMU1 Ring main unit 1
+RMU1.RING_IN Ring incomer (from upstream)
+RMU1.RING_OUT Ring outgoing (to next RMU)
+RMU1.TX_FDR Transformer feeder (fuse/switch or VCB)
+RMU1.TX_FDR2 Second transformer feeder (if 4-way)
+RMU1.SPARE Spare way
+RMU1.METER Metering cubicle (if fitted)
+RMU1.CTRL Control / protection (if numeric relay fitted)
+RMU2 Ring main unit 2
+RMU2.RING_IN Ring incomer
+RMU2.RING_OUT Ring outgoing
+RMU2.TX_FDR Transformer feeder
+RMU3 Ring main unit 3 (end of ring / normally open point)
+RMU3.RING_IN_A Ring incomer from circuit A
+RMU3.RING_IN_B Ring incomer from circuit B (NOP)
+RMU3.TX_FDR Transformer feeder
|
Full Tag Examples — RMU
1
2
3
4
5
6
7
8
9
10
11
12
13
| =MV.RING+RMU1.RING_IN-QS1 Ring incomer load break switch
=MV.RING+RMU1.RING_IN-ES1 Earthing switch on ring incomer
=MV.RING+RMU1.RING_OUT-QS2 Ring outgoing load break switch
=MV.RING+RMU1.RING_OUT-ES2 Earthing switch on ring outgoing
=MV.TX+RMU1.TX_FDR-QS3 TX feeder load break switch
=MV.TX+RMU1.TX_FDR-FU1 HRC fuse (if fused type)
=MV.TX+RMU1.TX_FDR-QB1 VCB (if VCB type with protection)
=MV.TX+RMU1.TX_FDR-F1 Protection relay (if VCB type)
=MV.TX+RMU1.TX_FDR-ES3 TX feeder earthing switch
=MV.METER+RMU1.METER-CT1 Metering CT
=MV.METER+RMU1.METER-VT1 Metering VT
=MV.METER+RMU1.METER-KWH1 kWh meter
=MV.EARTH+RMU1.RING_IN-ES1 Earthing switch (general)
|
RMU Network Topology Example
1
2
3
4
5
| Substation → +RMU1 → +RMU2 → +RMU3 (NOP) ← +RMU4 ← Substation
↓ ↓ ↓ ↓
TX_A TX_B TX_C TX_D
+TX_A +TX_B +TX_C +TX_D
+MSB_A +MSB_B +MSB_C +MSB_D
|
Busbar Trunking System (BTS)
Standards: IEC 61439-6 Used for HV-to-LV transformer to MSB connections, riser systems, and high-current distribution
Function Designations
1
2
3
| =PWR.BTS Busbar trunking function
=PWR.BTS.RISER Riser section function
=PWR.BTS.FDR Tap-off / feeder function
|
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
| +BTS1 Busbar trunking system 1
+BTS1.FEED_END Feeding end (transformer or MSB connection)
+BTS1.RISER Riser section (vertical run)
+BTS1.RISER.L1 Riser at level 1
+BTS1.RISER.L2 Riser at level 2
+BTS1.RISER.L3 Riser at level 3
+BTS1.RISER.L4 Riser at level 4
+BTS1.TAP_L1 Tap-off unit at level 1
+BTS1.TAP_L2 Tap-off unit at level 2
+BTS1.TAP_L3 Tap-off unit at level 3
+BTS1.DIST_RUN Horizontal distribution run
+BTS1.TAP_A Tap-off unit A (horizontal)
+BTS1.TAP_B Tap-off unit B
+BTS1.END_CAP End cap / termination
+BTS2 Busbar trunking system 2 (parallel riser)
|
Full Tag Examples — BTS
1
2
3
4
5
| =PWR.BTS+BTS1.FEED_END-X1 Busbar feed-end connector/joint
=PWR.BTS.FDR+BTS1.TAP_L1-QF1 Tap-off MCB/MCCB at level 1
=PWR.BTS.FDR+BTS1.TAP_L2-QF1 Tap-off MCB/MCCB at level 2
=METER+BTS1.FEED_END-PQ1 Power analyser at feed end
=METER+BTS1.TAP_L1-KWH1 Sub-meter at level 1 tap-off
|
Standards: IEC 60076 (oil), IEC 60076-11 (dry type) Note: In EPLAN, transformer LV and HV panels/terminations are the focus
Function Designations
1
2
3
4
5
6
| =TX Transformer function
=TX.HV HV side function
=TX.LV LV side function
=TX.COOL Cooling system function
=TX.PROT Protection function
=TX.EARTH Earthing function
|
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
| +TX1 Transformer 1 (the unit itself)
+TX1.HV_TERM HV termination box / cable box
+TX1.LV_TERM LV termination box / cable box
+TX1.MARSHALLING Marshalling box (protection wiring)
+TX1.COOL Cooling fans / radiators (oil type)
+TX1.OLTC On-load tap changer (if fitted)
+TX1.OLTC.CTRL OLTC controller
+TX1.BODY Transformer tank / enclosure
+TX1.BUND Bunding / oil containment area
+TX2 Transformer 2
+TX2.HV_TERM HV termination box
+TX2.LV_TERM LV termination box
|
1
2
3
4
5
6
7
8
9
10
11
12
| =TX.HV+TX1.HV_TERM-X1 HV cable termination terminal
=TX.LV+TX1.LV_TERM-X1 LV cable termination terminal (busbar)
=TX.PROT+TX1.MARSHALLING-F_DIFF Differential protection relay
=TX.PROT+TX1.MARSHALLING-F_BUCHH Buchholz relay (oil transformer)
=TX.PROT+TX1.MARSHALLING-F_WTI Winding temperature indicator
=TX.PROT+TX1.MARSHALLING-F_OTI Oil temperature indicator
=TX.PROT+TX1.MARSHALLING-F_OSL Oil surge relay / PRV
=TX.PROT+TX1.MARSHALLING-F_PRD Pressure relief device
=TX.COOL+TX1.COOL-KM1 Cooling fan contactor
=TX.COOL+TX1.COOL-F1 Fan overload protection
=TX.OLTC+TX1.OLTC.CTRL-AVR1 Automatic voltage regulator
=TX.EARTH+TX1.BODY-E1 Transformer body earthing
|
UPS Systems
Standards: IEC 62040 series Types: online double-conversion, line-interactive, static bypass, modular
Function Designations
1
2
3
4
5
6
7
8
9
| =PWR.UPS UPS function (overall)
=PWR.UPS.RECT Rectifier function
=PWR.UPS.BATT Battery function
=PWR.UPS.INV Inverter function
=PWR.UPS.BYP Static bypass function
=PWR.UPS.MBP Manual maintenance bypass function
=PWR.UPS.DIST UPS distribution function
=BATT Battery bank function
=CTRL UPS monitoring and control
|
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
| +UPS1 UPS system 1 (complete)
+UPS1.UPS_UNIT UPS main unit enclosure
+UPS1.UPS_UNIT.RECT Rectifier section
+UPS1.UPS_UNIT.INV Inverter section
+UPS1.UPS_UNIT.STS Static transfer switch section
+UPS1.UPS_UNIT.MBP Maintenance bypass section
+UPS1.BATT_CAB1 Battery cabinet 1
+UPS1.BATT_CAB2 Battery cabinet 2
+UPS1.BATT_CAB3 Battery cabinet 3
+UPS1.DIST_BOARD UPS output distribution board
+UPS1.DIST_BOARD.FDR_1 UPS feeder 1
+UPS1.DIST_BOARD.FDR_2 UPS feeder 2
+UPS1.DIST_BOARD.FDR_3 UPS feeder 3
+UPS1.DIST_BOARD.FDR_4 UPS feeder 4
+UPS1.INPUT_PANEL UPS input isolation panel
+UPS1.BYPASS_PANEL External bypass panel (if separate)
+UPS2 UPS system 2 (parallel / redundant)
+UPS2.UPS_UNIT UPS 2 main unit
+UPS2.BATT_CAB1 UPS 2 battery cabinet 1
|
Full Tag Examples — UPS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| =PWR.UPS+UPS1.INPUT_PANEL-QF_IN UPS input MCCB / isolator
=PWR.UPS.RECT+UPS1.UPS_UNIT.RECT-F1 Rectifier protection
=PWR.UPS.INV+UPS1.UPS_UNIT.INV-F1 Inverter protection
=PWR.UPS.BYP+UPS1.UPS_UNIT.STS-QS1 Static bypass switch
=PWR.UPS.MBP+UPS1.UPS_UNIT.MBP-QS_MBP Maintenance bypass switch
=BATT+UPS1.BATT_CAB1-F_BATT Battery fuse / disconnect
=BATT+UPS1.BATT_CAB1-BMS1 Battery management system module
=CTRL+UPS1.UPS_UNIT-PLC_UPS UPS controller / monitoring card
=CTRL+UPS1.UPS_UNIT-HL_NORMAL Normal operation indicator
=CTRL+UPS1.UPS_UNIT-HL_BATT On battery indicator
=CTRL+UPS1.UPS_UNIT-HL_FAULT Fault indicator
=PWR.UPS.DIST+UPS1.DIST_BOARD.FDR_1-QF1 UPS feeder 1 MCB
=PWR.UPS.DIST+UPS1.DIST_BOARD.FDR_2-QF2 UPS feeder 2 MCB
=METER+UPS1.DIST_BOARD-PQ1 UPS output power analyser
|
Automatic Transfer Switch (ATS)
Standards: IEC 60947-6-1, IEC 62580 Types: Open transition (break-before-make), closed transition (make-before-break)
Function Designations
1
2
3
4
5
| =PWR.ATS ATS function (overall)
=PWR.ATS.NORM Normal supply function
=PWR.ATS.ALT Alternative supply function (generator/second utility)
=PWR.ATS.LOAD Load side function
=CTRL.ATS ATS control logic function
|
Location Designations
1
2
3
4
5
6
7
8
9
| +ATS1 ATS panel 1
+ATS1.NORM_INC Normal supply incomer section
+ATS1.ALT_INC Alternative supply incomer section (generator)
+ATS1.TRANSFER Transfer switch mechanism section
+ATS1.LOAD Load side section
+ATS1.CTRL Control logic section
+ATS1.METER Metering section
+ATS2 ATS panel 2 (if multiple)
|
Full Tag Examples — ATS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
| =PWR.ATS.NORM+ATS1.NORM_INC-QF_NORM Normal supply MCCB
=PWR.ATS.ALT+ATS1.ALT_INC-QF_ALT Generator supply MCCB
=PWR.ATS+ATS1.TRANSFER-QS_NORM Normal supply isolator/contactor
=PWR.ATS+ATS1.TRANSFER-QS_ALT Alternative supply isolator/contactor
=PWR.ATS.LOAD+ATS1.LOAD-X_LOAD Load output terminals
=CTRL.ATS+ATS1.CTRL-K_NORM Normal supply sensing relay
=CTRL.ATS+ATS1.CTRL-K_ALT Alternative supply sensing relay
=CTRL.ATS+ATS1.CTRL-KT1 Transfer timer (delay on transfer)
=CTRL.ATS+ATS1.CTRL-KT2 Retransfer timer (delay on retransfer)
=CTRL.ATS+ATS1.CTRL-SS_AUTO Auto/manual selector
=CTRL.ATS+ATS1.CTRL-HL_NORM Normal supply available indicator
=CTRL.ATS+ATS1.CTRL-HL_ALT Generator supply available indicator
=CTRL.ATS+ATS1.CTRL-HL_ON_NORM On normal supply indicator
=CTRL.ATS+ATS1.CTRL-HL_ON_ALT On alternative supply indicator
=METER+ATS1.METER-PQ_NORM Normal supply power analyser
=METER+ATS1.METER-PQ_ALT Alternative supply power analyser
|
Power Factor Correction / Capacitor Banks
Standards: IEC 60831, IEC 61921 Types: Fixed, automatic stepped (APFC), detuned (with reactors)
Function Designations
1
2
3
4
5
| =PWR.PFC Power factor correction function
=PWR.PFC.INC Incomer function
=PWR.PFC.STEP Individual capacitor step function
=PWR.PFC.REACT Detuning reactor function
=PWR.PFC.CTRL PFC controller function
|
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
| +PFC1 PFC / capacitor bank panel 1
+PFC1.INC Incomer section
+PFC1.CTRL Controller section
+PFC1.STEP_1 Capacitor step 1 (fixed or switched)
+PFC1.STEP_2 Capacitor step 2
+PFC1.STEP_3 Capacitor step 3
+PFC1.STEP_4 Capacitor step 4
+PFC1.STEP_5 Capacitor step 5
+PFC1.STEP_6 Capacitor step 6
+PFC1.REACT Detuning reactor section (if detuned)
+PFC1.DISCHARGE Discharge resistor section
+PFC1.FILTER Harmonic filter section (if combined)
|
Full Tag Examples — PFC
1
2
3
4
5
6
7
8
9
10
11
| =PWR.PFC.INC+PFC1.INC-QF_INC PFC incomer MCCB
=PWR.PFC.INC+PFC1.INC-CT1 Incomer CT (for PF measurement)
=PWR.PFC.CTRL+PFC1.CTRL-PFC_CTRL1 Power factor controller relay
=PWR.PFC.STEP+PFC1.STEP_1-QF1 Step 1 MCB/fuse
=PWR.PFC.STEP+PFC1.STEP_1-KM1 Step 1 contactor
=PWR.PFC.STEP+PFC1.STEP_1-C1 Capacitor bank step 1
=PWR.PFC.REACT+PFC1.STEP_1-L1 Step 1 detuning reactor
=PWR.PFC.STEP+PFC1.STEP_2-QF2 Step 2 MCB/fuse
=PWR.PFC.STEP+PFC1.STEP_2-KM2 Step 2 contactor
=PWR.PFC.STEP+PFC1.STEP_2-C2 Capacitor bank step 2
=METER+PFC1.INC-PQ1 Power analyser (PF monitoring)
|
VFD / Drive Panels
Standards: IEC 61800 series Standalone VFD panels or multi-drive panels
Function Designations
1
2
3
4
5
6
7
| =DRIVE Drive system function (overall)
=DRIVE.INC Drive panel incomer function
=DRIVE.VFD Individual VFD function
=DRIVE.BRAKE Braking function
=DRIVE.FILTER EMC filter / reactor function
=DRIVE.BYP Bypass function
=CTRL Drive control function
|
Location Designations
1
2
3
4
5
6
7
8
9
10
| +VFD_PNL1 VFD panel 1 (standalone or multi-drive)
+VFD_PNL1.INC Incomer section
+VFD_PNL1.VFD_1 VFD 1 section / drive 1
+VFD_PNL1.VFD_2 VFD 2 section / drive 2
+VFD_PNL1.VFD_3 VFD 3 section
+VFD_PNL1.BRAKE_1 Braking resistor section for VFD 1
+VFD_PNL1.FILTER_1 EMC filter / line reactor for VFD 1
+VFD_PNL1.BYP_1 Bypass section for VFD 1
+VFD_PNL1.CTRL Control section (PLC, HMI, terminals)
+VFD_PNL1.DIST 24VDC distribution section
|
Full Tag Examples — VFD Panel
1
2
3
4
5
6
7
8
9
10
11
12
13
| =DRIVE.INC+VFD_PNL1.INC-QF_INC Panel incomer MCCB
=DRIVE.VFD+VFD_PNL1.VFD_1-QF1 VFD 1 input MCCB
=DRIVE.FILTER+VFD_PNL1.FILTER_1-EMC1 EMC filter / line reactor
=DRIVE.VFD+VFD_PNL1.VFD_1-VFD1 VFD 1 unit (drive module)
=DRIVE.VFD+VFD_PNL1.VFD_1-KM_OUT1 VFD 1 output contactor
=DRIVE.BRAKE+VFD_PNL1.BRAKE_1-RB1 Braking resistor
=DRIVE.BYP+VFD_PNL1.BYP_1-QF_BP1 Bypass MCCB
=DRIVE.BYP+VFD_PNL1.BYP_1-KM_BP1 Bypass contactor
=CTRL+VFD_PNL1.CTRL-SS_VFD_BP1 VFD/bypass selector
=CTRL+VFD_PNL1.CTRL-HL_RUN1 VFD 1 run indicator
=CTRL+VFD_PNL1.CTRL-HL_FAULT1 VFD 1 fault indicator
=CTRL+VFD_PNL1.CTRL-SB_RESET1 VFD 1 fault reset button
=CTRL+VFD_PNL1.CTRL-PLC1 Panel PLC (for multi-drive coordination)
|
Soft Starter Panels
Standards: IEC 60947-4-2 Inline or bypass type
Function Designations
1
2
3
4
| =MOTOR.SOFT Soft starter function
=MOTOR.SOFT.INC Incomer function
=MOTOR.SOFT.BYP Bypass contactor function
=CTRL Control function
|
Location Designations
1
2
3
4
5
6
| +SOFT_PNL1 Soft starter panel 1
+SOFT_PNL1.INC Incomer section
+SOFT_PNL1.SOFT_1 Soft starter 1 section
+SOFT_PNL1.SOFT_2 Soft starter 2 section
+SOFT_PNL1.BYP_1 Bypass contactor section for starter 1
+SOFT_PNL1.CTRL Control section
|
Full Tag Examples — Soft Starter
1
2
3
4
5
6
7
8
9
10
11
| =MOTOR.SOFT.INC+SOFT_PNL1.INC-QF_INC Panel incomer MCCB
=MOTOR.SOFT+SOFT_PNL1.SOFT_1-QF1 Soft starter 1 input MCCB
=MOTOR.SOFT+SOFT_PNL1.SOFT_1-F1 Overload relay / motor protection
=MOTOR.SOFT+SOFT_PNL1.SOFT_1-SS1 Soft starter unit
=MOTOR.SOFT.BYP+SOFT_PNL1.BYP_1-KM_RUN1 Run bypass contactor
=MOTOR.SOFT.BYP+SOFT_PNL1.BYP_1-KM_BP1 Bypass / delta contactor (inline type)
=CTRL+SOFT_PNL1.CTRL-SS_LOCAL1 Local/remote selector starter 1
=CTRL+SOFT_PNL1.CTRL-SB_START1 Start push button starter 1
=CTRL+SOFT_PNL1.CTRL-SB_STOP1 Stop push button starter 1
=CTRL+SOFT_PNL1.CTRL-HL_RUN1 Run indicator starter 1
=CTRL+SOFT_PNL1.CTRL-HL_FAULT1 Fault indicator starter 1
|
Control Panels (PLC / Relay Logic)
The most common panel type for machine builders and system integrators
Function Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
| =CTRL Control system function
=CTRL.PLC PLC function
=CTRL.IO I/O function
=CTRL.HMI HMI function
=CTRL.COMM Communications function
=CTRL.RELAY Relay logic function
=CTRL.TIMER Timer function
=CTRL.SAFE Safety controller function
=PWR.CTRL Control power distribution
=PWR.24V 24VDC power function
=SAFE Safety function
=SAFE.ESTOP Emergency stop function
=SAFE.GUARD Guard monitoring function
|
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
| +CP1 Control panel 1
+CP1.POWER Power supply section
+CP1.PLC PLC mounting section
+CP1.IO I/O modules section
+CP1.RELAY Relay section
+CP1.SAFE Safety relay section
+CP1.COMM Communications / network section
+CP1.DIST_24V 24VDC distribution section
+CP1.TERM Terminal section (field wiring)
+CP1.TERM.DI Digital input terminals
+CP1.TERM.DO Digital output terminals
+CP1.TERM.AI Analog input terminals
+CP1.TERM.AO Analog output terminals
+CP1.TERM.SAFE Safety terminal section
+CP1.TERM.COMM Communications terminals
+CP1.DOOR Door-mounted devices
+CP1.DOOR.HMI HMI touchscreen on door
+CP1.DOOR.OP Operator devices (buttons, lamps, selectors)
|
Full Tag Examples — Control Panel
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
| =PWR.CTRL+CP1.POWER-QF_MAINS Mains power MCB to panel
=PWR.CTRL+CP1.POWER-T1 Control transformer (230V→24VAC if needed)
=PWR.24V+CP1.POWER-PS1 24VDC SMPS power supply 1
=PWR.24V+CP1.POWER-PS2 24VDC SMPS power supply 2 (redundant)
=PWR.24V+CP1.POWER-UPS_MOD 24VDC UPS buffer module
=PWR.24V+CP1.DIST_24V-QF_PLC 24VDC MCB for PLC
=PWR.24V+CP1.DIST_24V-QF_IO 24VDC MCB for I/O modules
=PWR.24V+CP1.DIST_24V-QF_FIELD 24VDC MCB for field devices
=PWR.24V+CP1.DIST_24V-QF_SAFE 24VDC MCB for safety system
=CTRL.PLC+CP1.PLC-CPU1 PLC CPU module
=CTRL.IO+CP1.IO-DI01 Digital input module 01
=CTRL.IO+CP1.IO-DI02 Digital input module 02
=CTRL.IO+CP1.IO-DO01 Digital output module 01
=CTRL.IO+CP1.IO-DO02 Digital output module 02
=CTRL.IO+CP1.IO-AI01 Analog input module 01
=CTRL.IO+CP1.IO-AO01 Analog output module 01
=CTRL.COMM+CP1.COMM-CM_PN PROFINET communications module
=CTRL.COMM+CP1.COMM-CM_ETH Ethernet switch / module
=CTRL.COMM+CP1.COMM-CM_RS485 RS485 / Modbus module
=CTRL.HMI+CP1.DOOR.HMI-TP1 HMI touchpanel on door
=SAFE+CP1.SAFE-F3_SAFE Safety relay module
=SAFE.ESTOP+CP1.SAFE-F3_ESTOP Emergency stop safety relay
=SAFE.GUARD+CP1.SAFE-F3_GUARD Guard door safety relay
=CTRL+CP1.DOOR.OP-SS_MODE Mode selector switch
=CTRL+CP1.DOOR.OP-SB_RESET Fault reset push button
=CTRL+CP1.DOOR.OP-HL_POWER Power on indicator
=CTRL+CP1.DOOR.OP-HL_RUN Machine running indicator
=CTRL+CP1.DOOR.OP-HL_FAULT Fault indicator
=SAFE.ESTOP+CP1.DOOR.OP-SB_ESTOP Emergency stop push button (door mounted)
|
Motor Control Panels (standalone)
Single motor, DOL, star-delta, or reversing — standalone enclosure
Location Designations
1
2
3
4
5
6
7
8
| +MCP_M01 Motor control panel for motor M01
+MCP_M01.POWER Power section
+MCP_M01.CTRL Control section
+MCP_M01.TERM Terminal section
+MCP_P01 Motor control panel for pump P01
+MCP_P01.POWER Power section
+MCP_P01.CTRL Control section
|
Full Tag Examples — Standalone Motor Control Panel
1
2
3
4
5
6
7
8
9
10
| =PWR+MCP_M01.POWER-QF1 Incomer MCCB
=SAFE+MCP_M01.POWER-F1 Motor protection relay (overload + phase)
=MOTOR.DOL+MCP_M01.POWER-KM1 Main contactor
=CTRL+MCP_M01.CTRL-K_AUX1 Auxiliary relay
=CTRL+MCP_M01.CTRL-SS_LOCAL Local/remote selector
=CTRL+MCP_M01.CTRL-SB_START Start button
=CTRL+MCP_M01.CTRL-SB_STOP Stop button
=CTRL+MCP_M01.CTRL-HL_RUN Run indicator
=CTRL+MCP_M01.CTRL-HL_TRIP Trip indicator
=CTRL+MCP_M01.TERM-X1 Terminal block (field wiring)
|
Marshalling Cabinets
Interface between field cables and control/instrument panels. Used heavily in process, oil & gas, and power projects.
Function Designations
1
2
3
4
5
6
7
| =MARSH Marshalling function
=MARSH.DI Digital input marshalling
=MARSH.DO Digital output marshalling
=MARSH.AI Analog input marshalling
=MARSH.AO Analog output marshalling
=MARSH.SAFE Safety I/O marshalling
=MARSH.COMM Communications marshalling
|
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
| +MARSH_CAB1 Marshalling cabinet 1
+MARSH_CAB1.DI_RACK Digital input terminal rack section
+MARSH_CAB1.DO_RACK Digital output terminal rack section
+MARSH_CAB1.AI_RACK Analog input terminal rack section
+MARSH_CAB1.AO_RACK Analog output terminal rack section
+MARSH_CAB1.SAFE_RACK Safety I/O terminal rack
+MARSH_CAB1.BARRIER_RACK Zener barrier / isolator rack (hazardous area)
+MARSH_CAB1.POWER 24VDC power supply section
+MARSH_CAB1.TERM_FIELD Field cable terminations (left side)
+MARSH_CAB1.TERM_CTRL Control cable terminations (right side, to PLC)
+MARSH_CAB2 Marshalling cabinet 2
+MARSH_CAB3 Marshalling cabinet 3 (safety)
|
Full Tag Examples — Marshalling Cabinet
1
2
3
4
5
6
7
8
9
| =PWR.24V+MARSH_CAB1.POWER-PS1 24VDC power supply
=PWR.24V+MARSH_CAB1.POWER-QF1 24VDC MCB
=MARSH.DI+MARSH_CAB1.DI_RACK-X_DI01 DI terminal block row 01
=MARSH.DI+MARSH_CAB1.DI_RACK-X_DI02 DI terminal block row 02
=MARSH.DO+MARSH_CAB1.DO_RACK-X_DO01 DO terminal block row 01
=MARSH.AI+MARSH_CAB1.AI_RACK-X_AI01 AI terminal block row 01 (4-20mA)
=MARSH.AI+MARSH_CAB1.BARRIER_RACK-Z1 Zener barrier / isolator channel 1
=MARSH.AO+MARSH_CAB1.AO_RACK-X_AO01 AO terminal block row 01
=MARSH.SAFE+MARSH_CAB3.SAFE_RACK-X_S01 Safety terminal block row 01
|
Instrumentation Cabinets
For temperature, pressure, flow, and level instruments wiring termination
Location Designations
1
2
3
4
5
6
7
8
9
10
| +INST_CAB1 Instrumentation cabinet 1
+INST_CAB1.POWER Power supply section
+INST_CAB1.LOOP_POWER Loop power section (24VDC loops)
+INST_CAB1.TEMP Temperature instrument terminals
+INST_CAB1.PRESS Pressure instrument terminals
+INST_CAB1.FLOW Flow instrument terminals
+INST_CAB1.LEVEL Level instrument terminals
+INST_CAB1.ANAL Analyser interface section
+INST_CAB1.BARRIER Zener barrier / isolator section
+INST_CAB1.MTR Instrument air / utilities interface
|
Protection & Metering Panels
Common in substations and large switchgear applications
Function Designations
1
2
3
4
5
6
7
8
9
10
11
12
| =PROT Protection function
=PROT.OC Overcurrent protection
=PROT.EF Earth fault protection
=PROT.DIFF Differential protection
=PROT.DIST Distance protection
=PROT.BUSBAR Busbar protection
=PROT.REF Restricted earth fault
=METER Metering function
=METER.ENERGY Energy metering
=METER.PQ Power quality metering
=SCADA SCADA / RTU function
=DC DC auxiliary supply function
|
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
| +PROT_PNL1 Protection and metering panel 1
+PROT_PNL1.INC_A Incomer A protection section
+PROT_PNL1.INC_B Incomer B protection section
+PROT_PNL1.TX1_PROT Transformer 1 protection section
+PROT_PNL1.TX2_PROT Transformer 2 protection section
+PROT_PNL1.FDR_PROT Feeder protection section
+PROT_PNL1.BUSBAR Busbar protection section
+PROT_PNL1.METER Metering section
+PROT_PNL1.SCADA SCADA / RTU section
+PROT_PNL1.DC_DIST DC auxiliary distribution section
+PROT_PNL1.TERM Terminal section
+PROT_PNL1.COMM Communications section (IEC 61850 / GOOSE)
|
Full Tag Examples — Protection Panel
1
2
3
4
5
6
7
8
9
10
11
12
| =PROT.OC+PROT_PNL1.INC_A-F_OC_A Overcurrent relay incomer A (e.g. SEL-751, REF615)
=PROT.EF+PROT_PNL1.INC_A-F_EF_A Earth fault relay incomer A
=PROT.DIFF+PROT_PNL1.TX1_PROT-F_DIFF Differential relay transformer 1 (e.g. REF630)
=PROT.REF+PROT_PNL1.TX1_PROT-F_REF Restricted earth fault relay
=PROT.BUSBAR+PROT_PNL1.BUSBAR-F_BB Busbar protection relay (e.g. REB670)
=METER.ENERGY+PROT_PNL1.METER-KWH1 Fiscal energy meter
=METER.PQ+PROT_PNL1.METER-PQ1 Power quality analyser
=SCADA+PROT_PNL1.SCADA-RTU1 RTU / IED gateway
=SCADA+PROT_PNL1.SCADA-IED1 Protection IED (IEC 61850)
=DC+PROT_PNL1.DC_DIST-QF_DC1 DC MCB distribution
=DC+PROT_PNL1.DC_DIST-QF_DC2 DC MCB protection
=COMM+PROT_PNL1.COMM-SW_FIBER Managed fibre switch (IEC 61850 GOOSE)
|
Battery & DC Panels
For substation DC systems (110V DC / 48V DC / 24V DC) Standards: IEC 60896, IEC 62485
Function Designations
1
2
3
4
5
| =BATT Battery bank function
=DC.CHRG Battery charger function
=DC.DIST DC distribution function
=DC.INC DC incomer function
=DC.FDR DC feeder function
|
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
| +BATT_RM Battery room (top level)
+BATT_RM.BATT_BANK1 Battery bank 1 (string of cells)
+BATT_RM.BATT_BANK2 Battery bank 2
+CHRG_CAB1 Battery charger cabinet 1
+CHRG_CAB1.CHRG_A Charger A (main)
+CHRG_CAB1.CHRG_B Charger B (standby)
+CHRG_CAB1.CTRL Charger control section
+DC_DB1 DC distribution board 1 (110V DC)
+DC_DB1.INC DC incomer section
+DC_DB1.FDR DC feeder section
+DC_DB1.FDR.PROT Protection relay feeders
+DC_DB1.FDR.CTRL Control relay feeders
+DC_DB1.FDR.SCADA SCADA / RTU feeders
+DC_DB1.FDR.ALARM Alarm / indication feeders
+DC_DB1.FDR.MOTOR Motor trip coil feeders
+DC_DB1.DIODE Diode coupling (parallel chargers)
+DC_DB2 DC distribution board 2
|
Full Tag Examples — Battery & DC
1
2
3
4
5
6
7
8
9
10
| =BATT+BATT_RM.BATT_BANK1-FU_BATT1 Battery bank fuse / disconnect
=DC.CHRG+CHRG_CAB1.CHRG_A-CHRG_A Charger A unit
=DC.CHRG+CHRG_CAB1.CHRG_B-CHRG_B Charger B unit
=DC.INC+DC_DB1.INC-QF_DC_INC DC incomer fuse / MCB
=DC.FDR+DC_DB1.FDR.PROT-QF_P1 Protection relay DC feeder 1
=DC.FDR+DC_DB1.FDR.PROT-QF_P2 Protection relay DC feeder 2
=DC.FDR+DC_DB1.FDR.CTRL-QF_C1 Control relay DC feeder 1
=DC.FDR+DC_DB1.FDR.MOTOR-QF_M1 Trip coil DC feeder motor 1
=CTRL+CHRG_CAB1.CTRL-HL_CHRG_A Charger A on indicator
=CTRL+CHRG_CAB1.CTRL-HL_FAULT_A Charger A fault indicator
|
Emergency & Essential Boards
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
| +EMDB Emergency distribution board
+EMDB.INC_NORM Normal supply incomer
+EMDB.INC_GEN Generator supply incomer
+EMDB.ATS ATS section
+EMDB.BUS Essential busbar
+EMDB.FDR_1 Essential feeder 1 (fire alarm)
+EMDB.FDR_2 Essential feeder 2 (emergency lighting)
+EMDB.FDR_3 Essential feeder 3 (security)
+EMDB.FDR_4 Essential feeder 4 (comms / IT)
+EMDB.FDR_5 Essential feeder 5 (life safety)
+EMDB.UPS_FDR UPS-backed critical feeder
+ESDB Essential services distribution board
+ESDB.INC Incomer (from EMDB or generator)
+ESDB.FDR_1 Essential services feeder 1
+ESDB.FDR_2 Essential services feeder 2
|
Junction Boxes & Field Enclosures
The “location” for field-mounted devices with no dedicated panel
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
| +JB1 Junction box 1
+JB2 Junction box 2
+JB_M01 Junction box at motor M01
+JB_P01 Junction box at pump P01
+JB_AREA_A Junction box in area A
+JB_AREA_B Junction box in area B
+JB_VALVE1 Junction box at valve station 1
+JB_ROOF Junction box on roof
+JB_FIELD_N Junction box on north field area
+EX_JB1 Explosion-proof junction box 1 (Ex zone)
+EX_JB2 Explosion-proof junction box 2
+LS_BOX1 Local isolator / switch box 1
+LS_BOX_M01 Local isolator box at motor M01
+FIELD General field (no enclosure)
+FIELD.AREA_A Field area A
+FIELD.AREA_B Field area B
|
Full Tag Examples — Junction Box
1
2
3
4
5
6
7
| =INST+JB_P01-X1 Terminal strip for pump P01 instruments
=CTRL+JB_P01-X2 Terminal strip for pump P01 control signals
=PWR+JB_P01-QS1 Local isolator for pump P01
=SAFE.ESTOP+JB_P01-SB_E Local e-stop at pump P01
=CTRL+JB_P01-HL_RUN Run indication lamp at pump P01
=INST+EX_JB1-X1 Terminals in Ex JB 1 (intrinsically safe)
=INST+EX_JB1-Z1 Zener barrier in Ex JB 1
|
Busbar Chambers & Interconnections
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
| +BUSDUCT1 Main busbar chamber / duct 1
+BUSDUCT1.FEED Feed end (transformer LV terminals)
+BUSDUCT1.RUN Busbar run section
+BUSDUCT1.MSB_END MSB end connection
+INTER_CAB1 Interconnection / cable spreading chamber 1
+INTER_CAB1.MV_TERM MV cable termination section
+INTER_CAB1.LV_TERM LV cable termination section
+CABLE_VAULT1 Underground cable vault 1
+CABLE_VAULT1.JOINTS Cable joints section
+CABLE_VAULT1.TERM Cable terminations
|
Operator Stations & HMI Panels
Location Designations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
| +OP1 Operator station 1
+OP1.HMI HMI touchscreen section
+OP1.CTRL Control buttons / lamps section
+OP1.ESTOP Emergency stop section
+OP1.KEY_SW Key switch section
+OP2 Operator station 2
+OP_REMOTE1 Remote operator station 1
+DESK1 Operator desk / console 1
+DESK1.MONITOR Monitor section
+DESK1.KEYBOARD Keyboard / peripherals
+DESK1.PC PC / workstation
+DESK1.KVM KVM switch
+PENDANT1 Operator pendant 1
+PENDANT1.CTRL Pendant control buttons
+PENDANT1.ESTOP Pendant emergency stop
|
Complete Single-Line Examples
Example 1 — Industrial Site: Utility to Motor
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
| Grid supply
↓
+RMU1 (=MV.RING) → Ring main unit
↓ TX feeder
+TX1 (=TX) → 11kV/415V transformer
↓ Busduct
+BTS1 (=PWR.BTS) → Busbar trunking to MSB
↓
+MSB1 (=PWR) → Main LV switchboard (ACB incomer)
↓ Feeder
+MCC1 (=MOTOR) → MCC (for motors up to 200kW)
↓ Drawer
+MCC1.M01 → DOL starter for motor M01
↓
Field: +JB_M01 → Junction box at motor M01
↓
Motor M01
Full device tag: =MOTOR.DOL+MCC1.M01-KM1 (main contactor)
|
Example 2 — Data Centre Power Chain
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| +UTIL (=PWR.INC) → Utility incoming (2 feeds)
↓
+MSB1.INC_A (=PWR) → MSB incomer A (utility A)
+MSB1.INC_B (=PWR) → MSB incomer B (utility B or generator)
+MSB1.TIE (=PWR.TIE) → Bus tie
↓
+ATS1 (=PWR.ATS) → Automatic transfer switch (for generator)
↓
+UPS1 (=PWR.UPS) → UPS system (double conversion)
↓
+UPS1.DIST_BOARD → UPS output distribution
↓ feeders
+PDU_A1 (=PWR) → Power distribution unit A (critical load)
+PDU_B1 (=PWR) → Power distribution unit B (redundant)
|
Example 3 — Substation: Grid to LV Bus
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
| +MV_SW1.INC_1 (=MV.INC) → 11kV incomer VCB
↓ busbar
+MV_SW1.BUS_SEC (=MV.TIE) → Bus section VCB
↓
+MV_SW1.TX_FDR1 (=MV.TX) → 11kV transformer feeder VCB
↓
+TX1 (=TX) → 11kV/415V transformer (1600kVA)
↓
+MSB1.INC_A (=PWR.INC) → LV MSB ACB incomer
↓
+MSB1.FDR_1 (=PWR.FDR) → Feeder to MCC
+MSB1.FDR_2 (=PWR.FDR) → Feeder to DB1
+MSB1.FDR_3 (=PWR.FDR) → Feeder to PFC1
+MSB1.UPS_FDR (=PWR.UPS) → Feeder to UPS
↓
+PFC1 (=PWR.PFC) → Power factor correction bank
|
IEC Standards Quick Reference
| Equipment | Relevant IEC Standard |
|---|
| MV Switchgear (metal-enclosed) | IEC 62271-200 |
| MV Circuit Breakers | IEC 62271-100 |
| MV Load Break Switches | IEC 62271-103 |
| LV Switchgear & Controlgear Assemblies | IEC 61439-1 (general), IEC 61439-2 (power) |
| LV Consumer / Distribution boards | IEC 61439-3 |
| Motor Control Assemblies | IEC 61439-4 (also IEC 60947-4 for starters) |
| LV Circuit Breakers | IEC 60947-2 |
| Contactors | IEC 60947-4-1 |
| Soft Starters | IEC 60947-4-2 |
| VFDs | IEC 61800-2, IEC 61800-3 |
| Ring Main Units | IEC 62271-200, IEC 62271-105 |
| Transformers (oil) | IEC 60076 |
| Transformers (dry type) | IEC 60076-11 |
| Busbar Trunking | IEC 61439-6 |
| UPS Systems | IEC 62040-1, IEC 62040-3 |
| ATS / Transfer Switches | IEC 60947-6-1 |
| Capacitor Banks / PFC | IEC 60831, IEC 61921 |
| Battery Systems (VRLA) | IEC 60896-21/22 |
| Battery Chargers | IEC 62485-3 |
| Protection Relays | IEC 60255 series |
| Energy Meters | IEC 62053 series |
| Power Analysers | IEC 61000-4-30 |
Common Mistakes for Panel Builders
| ❌ Wrong | ✅ Correct | Reason |
|---|
=PANEL_A | +PANEL_A | The panel is a location, not a function |
+MOTOR_1 | +MCC1.M01 or +JB_M01 | Motor is a device/field point, not a panel location |
+Q1 or +KM1 | +MCC1.M01-KM1 | Component is a device -, not a location + |
Naming all sections +SEC | +SEC_1, +SEC_2, +SEC_3 | Non-unique section names break report grouping |
Leaving + blank on all pages | Use +PANEL_NAME at minimum | Blank location = useless terminal and cable reports |
+MCC 1 (with space) | +MCC1 | Spaces break EPLAN structure identifiers |
One location for entire project: +SITE | Break into panel-level locations | Too broad — all reports merge into one group |
+MCC1.DRAWER_FOR_MOTOR_1 | +MCC1.M01 | Too long — truncated in reports and tables |
Mixing = and + purpose | Function stays in =, physical location in + | Crossing them over destroys report filtering |
Different engineers using +CP, +CP1, +CTRL_PNL for same panel | Standardise at project setup | Inconsistency means reports split the same panel |
Expert Tips for Panel Builders
1. Set your location structure in the project settings first
Before drawing page 1, define all + locations in Project data → Structure identifiers. This prevents inconsistent names and typos spreading through hundreds of pages.
2. One + per physical enclosure — always
Every panel, cabinet, junction box, and operator station gets its own unique + location. This is what makes terminal diagrams, cable schedules, and BOMs filter correctly.
3. Use section-level + for large panels (MCC, MSB)
+MCC1.M01 for each motor drawer means your terminal diagram for drawer M01 prints cleanly, separately from M02. Without section-level +, all MCC terminals print as one massive list.
4. +FIELD is not just a placeholder — use it actively
All instruments, sensors, solenoids, and actuators without their own enclosure should use +FIELD or +JB_NEAREST. This keeps your connection list and cable schedule complete.
5. Name drawers and compartments after the load, not the position
+MCC1.M01 (motor M01 feeder) is better than +MCC1.SEC2.C04 (section 2, compartment 4). Load-named locations survive design changes when drawers are moved.
6. Keep + names consistent with the panel schedule and SLD
If your single-line diagram calls a panel MCC-1A, your EPLAN location should be +MCC_1A. Never let EPLAN names and drawing names diverge.
7. Use +PANEL.DOOR for door-mounted devices
Separating door devices (+CP1.DOOR) from internal devices (+CP1.RELAY) keeps your panel layout and door drilling drawings clean and auto-separable.
8. For multi-section MCCs, decide early: section-based or load-based naming
Section-based (+MCC1.SEC_1.C01) suits shop drawings. Load-based (+MCC1.M01) suits field commissioning and maintenance. Load-based is usually preferred for complex projects.
9. DC and AC auxiliary supplies need their own + sub-location
+MSB1.CTRL or +MCC1.CTRL_SEC keeps your 24VDC and 230VAC auxiliary wiring separated from the main power circuits in every report.
10. Validate with reports before issuing for manufacture
Run a terminal diagram, cable list, and parts list before releasing drawings. If the report grouping looks wrong — too many or too few groups — your + structure is the first place to check.
Based on IEC 61439 | IEC 62271 | IEC 60947 | IEC 61800 | IEC 62040 | IEC 60076 | IEC 60831 | IEC 60255 | IEC 62053 Expert conventions for panel builders, system integrators, switchgear manufacturers, and electrical engineering firms
