APPENDIX 8
ELECTRICAL SYMBOLS
1 of 56
Table of Contents
1. Current Current Systems, System Configurations And Protective Protective Conductors ............. ............. ............. ............. 3 2. Screening, Enclosure And Medium............. Medium ............. ............. ............. .............. ............. ............. ............. ........... 5 3. Regulati Regulating ng Systems Systems ...................... ................................. ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... ................ ..... 6 4. Mechanical Controls........... ............. ............. ............. .............. ............. ............. ............. ............. ......... 7 5. Qualifying Symbols..... ............. .............. ............. ............. ............. ............. .............. ............. ............. .. 8 6. Batteries, Semi-Conductors, Semi-Conductors, Generators, Motors And Converters ............ ............. ............. .............. .... 10 7. Transformers, Reactors And Transductors.................. .............. ............. ............. ............. ............. ....... 12 8. Conductors, Lines And Cables ............. .............. ............. ............. ............. ............. .............. ............. .. 15 9. Overhead Line And Cable Accessories.......... Accessories.......... ............. .............. ............. ............. ............. ............. ....... 20 10. Terminals, Connections And Contact Elements............. Elements ............. ............. ............. ............. .............. ............. .. 21 11. Resistors, Coils And Capacitors............ Capacitors ............ ............. ............. ............. ............. .............. ............. ............. 22 12. Relay Relay Coils Coils And Contacts Contacts ...................... ................................. ...................... ...................... ...................... ...................... ...................... ...................... ...................... .............. ... 23 13. Circuit Circuit Breakers, Breakers, Contactors, Contactors, Plugs, Plugs, Sockets Sockets And Push Buttons.... Buttons................. ............. .............. ............. ............. 26 14. Automatic Tripping Devices, Devices, Starting Equipment Equipment And Remote-Control Remote-Control Units................ Units................ ............. ....... 29 15. Switch-gear Switch-gear And Distribution Distribution Boxes ............. .............. ............. ............. ............. ............. .............. .... 33 16. Protecti Protective ve Devices Devices ...................... ................................. ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... .............. ... 34 17. Instruments Instruments And Metering Systems....... ............. ............. ............. ............. .............. ............. ............. 35 18. Lamp Fitting Fittings, s, Etc ...................... ................................. ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... .............. ... 38 19.Generating Stations And Substations (Planned)..... ............. ............. .............. ............. ............. ........... 41 20. Signaling Equipment And Clocks................ ............. .............. ............. ............. ............. ............. ....... 42 21. Protection Protection Relay Symbols............ Symbols ............ ............. ............. ............. .............. ............. ............. ............. ......... 43 21.1 Device Device Functi Function on Number Numbers, s, Indica Indicating ting The Device Device Functi Function on Which Which Cause Causess Relay Relay Operat Operatee ....... 43 21.2 Device Device Functi Function on Numbers Numbers,, Indicat Indicating ing The The Device Device Function Function Which Which Causes Causes Relay Relay Operate Operate ....... 45 21.3 Device Device Functi Function on Number Numbers, s, Indica Indicating ting The Device Device Functi Function on Which Which Cause Causess Relay Relay Operat Operatee ....... 48 21.4 Device Device Functi Function on Number Numbers, s, Indica Indicating ting The Device Device Functi Function on Which Which Cause Causess Relay Relay Operat Operatee ....... 50 22. Building Electrical Installation (Light Switches)....................... ............. ............. ............. .............. .... 51 23. Electro Acoustic Elements ............. ............. ............. .............. ............. ............. ............. ............. ....... 54 24 Cathodic Cathodic Protecti Protection on ..................... ................................ ...................... ...................... ...................... ...................... ...................... ...................... ...................... ...................... .............. ... 55 25. Hazardous Area Classification Classification .............. ............. ............. ............. ............. .............. ............. ............. 56
2 of 56
APPENDIX - 8
1. Current Systems, System Configurations And Protective Conductors E0101A
IEC
Direct Current (DC)
E0105
IEC
Direct or alternating current (DC or AC) symbol for equipment for universal use
E0108
IEC
One Winding
E0112
E0102
IEC
Alternating current, (AC) low freq. (power or sub audio freq.)
E0106
IEC
Rectified current with alternating component
E0109
IEC
Three separate windings
IEC
Two-phase winding
E0113
IEC
Two-phase winding, four wire
E0103
IEC
E0104
IEC
Alternating current, medium freq. (audio or telephone freq.)
Alternating current, high freq. (super audio, carrier and radio freq.)
E0107
63B1
IEC
IEC
Alternating Alternating current of m phases and frequency frequency f
Three conductors within one screen
E0110
E0111
IEC
m Separate Windings,
E0114
IEC
Three-phase winding V-Connected (60o)
3 of 56
IEC
Three-phase winding, T-Connected
E0115
IEC
Three-phase winding, open-delta connected
E0116
IEC
Three - phase winding, delta-connected
E0120
IEC
E0117
IEC
Three-phase winding, three wire star-connected
E0121
IEC
Connection symbol, e.g. of a primary deltasecondary starconnected, three-phase transformer with clock hour figure figure 11. Capital letter for high voltage winding
Three-phase winding, three wire zig-zag or interconnected star
E0124
E0125
IEC
Six-phase winding, polygon-connected
E0128
IEC
Supply DC System
E0132
IEC
Three-phase winding, four wire, starconnected, with neutral brought out.
E0122
IEC
E0119
IEC
Star-delta winding configuration
E0123
ZADCO
Three-phase winding, four wire zig-zag or interconnected star, with neutral brought out.
IEC
IEC
Supply DC System positive Negative Mid-Wire
E0133
IEC
Six-phase winding, double-delta-connected
Six-phase winding, star-connected
E0129
E0118
E0126
IEC
IEC
Danger (high voltage)
Place of breakdown or faults as used in shortcircuit calculations or protective gear diagrams diagrams
E0130
E0131
IEC
Earth (ground), general
IEC
E0127
E0134
IEC
IEC
Protective earth (ground)
E0135
IEC
No Symbol Protective conductor and neutral conductor combined
Noiseless (clean) earth (ground)
Frame or chassis
4 of 56
Equipotentiality
APPENDIX - 8
2. Screening, Enclosure And Medium E0201
IEC
E0202A
IEC
E0203
IEC
Empty Enclosure, general
E0204
IEC
Liquid material
Boundary line (any combination of short and long strokes)
Screen (the screen may be drawn in any convenient shape)
E0205
IEC
E0206
Gaseous material
IEC
Insulation material
5 of 56
E0301
IEC
Variability, general (non-inherent)
APPENDIX - 8
3. Regulating Systems E0302
IEC
Variability, pre-set adjustment
E0306
IEC
Variability in steps
E0303
IEC
IEC
Variability, inherent, non-linear
Variability, inherent
E0307
E0304
IEC
Variability, continuos
E0308
IEC
Variability, variable in 8 steps
6 of 56
E0305
IEC
Continuous variability
E0309
IEC
Variability, inherently automatic
APPENDIX - 8
4. Mechanical Controls E0401A
IEC
A/ General symbol
E0404
IEC
Devices for restricted movement of a mechanical link (unblocked position)
E0408
IEC
Manually operated control, general
E0412
IEC
Operated by turning
E0416
IEC
Operated by roller
E0401B
IEC
B/ For use in restricted space
E0405
IEC
E0402
Locking device, padlock facility
E0406
Mechanical interlock between two devices
E0409
IEC
Manually operated control with restricted access
E0413
IEC
IEC
IEC
Automatic return (e.g. spring return)
E0410
IEC
Operated by pushing
E0414
Operated by hand-wheel
E0417
IEC
IEC
Operated by pedal
E0418
Operated by cam
IEC
Operated by crank
7 of 56
E0403
IEC
Devices for restricted movement of a mechanical link (unblocked position)
E0407
IEC
Non-automatic return
E0411
IEC
Operated by pulling
E0415
IEC
Operated by lever
E0419
IEC
Operated by removable handle
APPENDIX - 8
5. Qualifying Symbols E0503
IEC
Repeating 0 times
E0507
IEC
Bi-directional rotation limited in both directions
E0511
IEC
Light-operated arrow pointing towards symbol light generating and/or modulating arrows pointing away from symbols
E0515
IEC
Circuit breaker
E0504
IEC
Rectilinear force or motion in the direction of the arrow
E0508
ZADCO
E0505
Bi-directional pectilinear force or motion
E0509
IEC
E0513
Temperature dependence
E0516
Disconnector (isolator) function
E0517
IEC E0514
IEC
Contactor function
IEC E0518
Switch-disconnector (isolating switch) function
8 of 56
IEC
Automatic release function
Permanent magnet
IEC
IEC
Uni-directional rotation in the direction of the arrow for example clockwise
ZADCO E0510
Stop (off)
Start (on)
E0512
IEC E0506
IEC
Position switch function limit switch function
E0519
IEC
Delayed action in the direction of movement from the arc towards its center. (to be linked with double line E0401 to the symbol of the device)
E0523
IEC
Operating when the characteristics value is lower than the setting value
E0520
IEC
E0521
Non-spring return (stay put) function
Spring return function
E0524
IEC E0522
IEC
E0525
Operating when the characteristics value is either higher than a given high setting or lower than a given low setting
9 of 56
IEC
Operating when the characteristic value becomes zero
IEC
Operating when the characteristic value is higher than the setting value
APPENDIX - 8
6. Batteries, Semi-Conductors, Generators, Motors And Converters E0601
IEC
E0602
IEC
E0603
IEC E0604
Primary cell or accumulator (the long line represents the positive pole, the other the negative)
Battery of accumulators or primary cells
Battery with tapping
E0605
E0606
E0607
IEC
Bi-directional diode (varistor)
E0609
IEC
Reverse blocking thyristor n-gate (anode side controlled)
E0613
Transistor NPN
IEC
IEC
E0610
IEC
E0611
Bi-directional thyristor
E0614
E0615
Machine general symbol. The asterisk shall be replaced by a letter designation as follows:Motor(M), generator(G), synchronous Converter (c)
10 of 56
IEC
Transistor PNP
IEC E0616
Machine capable of use as motor or generator, general
IEC
Thyristor, general
IEC E0612
Reverse blocking thyristor p-gate (cathode side controlled)
IEC
Semi-conductor diode
IEC E0608
Breakdown diode, bidirectional
Breakdown diode, undirectional
IEC
IEC
Mechanically coupled machines, general
E0617
ZADCO
Non rotary generator, oscillator
E0621
IEC
Commutating or compensating winding
E0625
IEC
Inverter, power converter DC/AC
E0629
IEC
Synchronous generator (GS) or synchronous motor (MS), three phase, both leads of each phase brought out
E0633
E0618
IEC
E0619
Shunt winding or separate winding
Stator with two windings
E0622
IEC
E0623
IEC
DC Converter, power converter DC/DC
E0630
ZADCO
E0627
E0631
DC generator with permanent magnet excitation
IEC
Three - phase induction motor with squirrel cage rotor, all six winding ends brought out
11 of 56
IEC
Static switch
IEC E0632
Three phase induction motor with slip ring rotor
IEC
Rectifier, power converter AC/DC
IEC E0628
Frequency changer, power converter f1/f2
IEC
Series winding
IEC E0624
Power converter, general the arrow is optional
Synchronous converter, general
E0626
IEC E0620
IEC
Three - phase induction motor with squirrel cage rotor.
APPENDIX - 8
7. Transformers, Reactors And Transductors E0701
IEC
Choke reactor, inductor, winding multi - line representation
E0705
IEC
Transformer, single phase with two separate windings simplified single line representation
E0709
IEC
E0702
IEC
Ferro-magnetic core, general
E0706
IEC
Transformer, single phase with two separate windings multi line representation
E0710
IEC
E0703
IEC
Ferro-magnetic core with air gap, general
E0707
IEC
Transformer with two tappings single phase simplified single line representation
E0711
IEC
E0704
IEC
Winding of a transformer, general
E0708
IEC
Transformer with two tappings single phase multi line representation
E0712
IEC
Auto-transformer, single phase simplified singleline representation
Auto-transformer, single phase multi line representation
Choke reactor, inductor, winding simplified single - line representation
Inductor (reactor) with Ferro-magnetic core unless otherwise indicated, general multi line representation
E0713
E0714
E0715
E0716
IEC
Induction regulator, single phase simplified single - line representation
IEC
Induction regulator, single phase multi-line representation
IEC
Current transformer, general simplified single line representation
12 of 56
IEC
Current transformer, general multi line representation
E0717
IEC
Current transformer with two secondary windings on one core simplified single line representation
E0721
IEC
Voltage transformer simplified single line representation
E0725
IEC
Transformer with offvoltage tap changer, three-phase
E0729
IEC
Current transformer with three primary windings simplified single line representation
E0718
IEC
Current transformer with two secondary windings on one core multi line representation
E0722
IEC
Voltage transformer, multi line representation
E0726
IEC
Transformer with offvoltage tap changer, three phase
E0730
IEC
Current transformer with three primary windings multi line representation
E0719
IEC
Current transformer with two cores simplified single line representation
E0723
IEC
Transductor winding, general
E0727
IEC
Current transformer, where the primary conductor forms five winding turns simplified single line representation
E0736
ZADCO
Current transformer surrounding three conductors (core balance) simplified single line representation
13 of 56
E0720
IEC
Current transformer with two cores multi line representation
E0724
IEC
Transductor core
E0728
IEC
Current transformer, where the primary conductor forms five winding turns multi line representation
E0737
IEC
Current transformer surrounding three conductors (core balance) multi line representation
E0731
IEC
Current transformer, with one secondary tapping (three leads brought out) simplified single - line representation
E0735
E0732
IEC
Current transformer, with one secondary tapping (three leads brought out) multi line representation
E0733
IEC
Transductor element in assembled representation
IEC
Tertiary winding transformer
14 of 56
E0734
IEC
Zig-Zag transformer
APPENDIX - 8
8. Conductors, Lines And Cables E0801
IEC
Conductor or group of conductors, general
E0805
IEC
General symbol denoting twisting of conductors
E0802
IEC
General symbol denoting screening of conductors
E0806
IEC
E0803
Conductors (n ×) within one screen
E0807
Conductors (n ×) twisted
E0810
IEC
IEC
General symbol denoting cable
IEC
E0811
IEC
Empty Underground line
E0813
IEC
Submarine line
E0817
IEC
Earthed metallic screen
E0814
Line not mounted in sight
IEC
Conductors in conduit
E0818
IEC
Conductors, crossing without electrical connection
E0815
IEC
Neutral conductor
E0819
IEC
Junction of conductors
15 of 56
E0804
IEC
Flexible conductor
E0808
IEC
Conductors (n ×) within one cable
E0812
IEC
Line mounted in sight
E0816
IEC
Earthed conductor
E0820
IEC
Double junction of conductors
E0821
IEC
Common connection to a group of apparatus (e.g. multipled or looped)
E0825
IEC
Method of indicating data for each separate wire or cable in one bundle or channel
E0829
IEC
Conductors dividing
E0833
IEC
E0822
IEC
Test point indicator
E0826
IEC
Method of indicating data for each separate wire or cable if more than one cable is represented by one line
E0830
IEC
E0823
IEC
E0824
IEC
Conductor joint, in line splice
Method of indicating conductors data if the marked wires lie in one cable bundle or circuit
E0827
E0828
IEC
Conductors dividing
E0831
Bundle of wires or cables
E0834
IEC
IEC
Bundle of wires or cables, crossing
E0835
IEC
Conductors dividing
E0832
IEC
Bundle of wires or cables, dividing
IEC
Empty
Wiring or conductor going upwards
Wiring or conductor going downwards
Wiring or conductor passing through vertically
16 of 56
E0839
IEC
E0840
IEC
Empty
Empty
Coaxial pair, general Coaxial pair with outer conductor connected to earth
E0841
IEC
Coaxial pair with screen
E0845
IEC
Four separate circuits or conductors
E0849
IEC
Coaxial socket
E0853
ZADCO
E0842
IEC
IEC
Three phase circuit 50 Hz three conductors of 120mm2 and neutral of 50mm2 single -line representation
E0850
IEC
E0847
IEC
Three phase circuit 50 Hz three conductors of 120mm2 and neutral of 50mm2 for multi-line representation
E0851
Coaxial plug
E0854
IEC
Conductor or cable not connected
End of coaxial conductor
E0846
E0843
IEC
Earth bar
ZADCO
Equipment frame earth connection
E0855
ZADCO
E0844
IEC
Conductor or cable not connected and especially insulated
E0848
IEC
Three phase circuit 50 Hz three conductors of 120mm2 and neutral of 50mm2 for multi-line representation
E0852
ZADCO
Main plant earth electrode
E0856
ZADCO
Earth cable on surface
Supplementary earth electrode
17 of 56
Earth cable branch connection
E0857
ZADCO
Conduit laid in floor screed
E0861
ZADCO
Micc cable run on surface
E0865
ZADCO
Under ground earth cable in excavated trench (Existing)
E0869
ZADCO
Elect../Inst./Telecom. under ground cable in excavated trench (existing)
E0873
IEC
Neutral conductor
E0858
ZADCO
Conduit run on surface
E0862
ZADCO
Cable tray
E0866
ZADCO
Under ground earth cable in excavated trench (proposed)
E0870
ZADCO
Elect./Inst./Telecom. under ground cable in excavated trench (proposed)
E0874
IEC
Protective conductor
E0859
ZADCO
Conduit concealed in slab
E0863
ZADCO
E0860
ZADCO
Cable run on surface
E0864
ZADCO
G.I / PVC trunking
Elect./Inst./Telecom. cable in under ground PVC duct
E0867
E0868
ZADCO
Earth cable in concrete trench (existing)
E0871
ZADCO
ZADCO
Earth cable in concrete trench (proposed)
E0872
ZADCO
Elect./Inst./Telecom. cable in concrete trench (existing)
Elect./Inst./Telecom. cable in concrete trench (proposed)
E0875
E0876
IEC
Combined protective and neutral conductor
18 of 56
IEC
Three-phase wiring with neutral conductor and protective conductor
E0877
IEC
Three-phase and neutral or three conductors and neutral
E0878
IEC
Three-phase or three conductors
E0879
IEC
Single-phase and neutral or single conductor and neutral
19 of 56
E0880
IEC
Two-phase or two conductors
APPENDIX - 8
9. Overhead Line And Cable Accessories E0910
ZADCO
E0911
ZADCO E0912
IEC
Empty Conduit entry
E0913
IEC
Junction for three cables underground
E0914
Straight-through joint box underground
Stuffing gland
IEC
E0915
Junction for four cables underground
20 of 56
IEC E0916
Cable sealing end box
IEC
Branching box (e.g. with four outlets)
APPENDIX - 8
10. Terminals, Connections And Contact Elements E1001
IEC
E1002
IEC
Terminal connections of conductors, general
Terminal connections of conductors, general moveable contact hinged
E1005A
E1005B
IEC
Connecting link, closed
E1005A
IEC
Connecting link, open
E1003
IEC
Terminal strip
E1006
IEC
Brush on commuter or slip ring
IEC
Mated Plug and socket
21 of 56
E1004
ZADCO
Connection link with bolted contacts
E1007
ZADCO
Draw-out representation of switch-gear accessories
APPENDIX - 8
11. Resistors, Coils And Capacitors E1101
IEC
IEC
Capacitor, capacity, general
E1109
IEC
Chasis capacitor
E1111
IEC
3. Self inductance
E1114
IEC
E1103
Resistor with fixed tappings
Resister
E1105
E1102
IEC
Resistor with inherent non-linear character
E1106
IEC
Inductor, coil, winding, choke
E1107
IEC
E1111
E1111
IEC
IEC
E1116
Resistor with inherent nonlinear character
22 of 56
IEC
Non-polarized electrolytic capacitor
IEC
2. Reactance
IEC E1113
Variable resistor
4. Resistance
E1115
E1112
Shunt
IEC E1111
Code letters, indicating type of impedance 1 impedance
Feed through capacitor
IEC
IEC E1108
Polarized electrolytic capacitor
Polarized capacitor, general
E1110
IEC E1104
ADC O
Variable resistor with inherent non-linear character
IEC E1117
Resistor with sliding contact
IEC
Shunt / series capacitor
APPENDIX - 8
12. Relay Coils And Contacts E1201
IEC
CON= Contactor IR = Interposing Relay CC = Closing coil TC = Tripping Coil K= ReAcceleration
E1205
IEC
Relay coil of a remnant relay
E1209
IEC
E1202
IEC
Non-inductive winding (bifilar)
E1206
IEC
Relay coil of a slow releasing relay
E1210
IEC
Relay coil of a very slow operating relay
Relay coil of a high-speed relay (fast-operating and releasing)
E1213
E1214
IEC
Relay coil of a relay unaffected by alternating current
IEC
Relay coil of a mechanically latched relay
23 of 56
E1203
IEC E1204
Relay coil with one winding
E1207
E1211
IEC
Relay coil of slowoperating relay
IEC E1212
IEC
Relay coil of an AC relay
Relay coil of a polarized relay
E1215
Relay coil with two windings, separate representation
IEC E1208
Relay coil of a very slow-releasing relay
IEC
IEC E1216
Relay coil of an impulse, sequence relay
IEC
Relay coil of a slowoperating and slow releasing relay
E1217
IEC
Actuating device for a thermal relay(e.g. thermal overload relay)
E1221
IEC
Change over contact, make before break
E1225
IEC
E1218
IEC
Make contact
E1222
IEC
Contact with two breaks
E1226
IEC
Two-way contact with center-off position with spring return from the left-hand position, but not from the right-hand one (stay put)
Passing make contact closing momentarily when its operating device is actuated
E1229
E1230
IEC
IEC
E1219
IEC E1220
Change over contact, break before make
Break contact
E1223
IEC E1224
Contact with two breaks
E1227
Make contact (of a multiple contact assembly) which is late to operate relative to the other contacts of the assembly
Break contact (of a multiple contact assembly) which is early to operate relative to the other contacts of the assembly
E1233
E1234
E1235
IEC
Flasher, operated by an actuating device of a thermal relay
IEC
Make contact delayed when closing
24 of 56
IEC
Break contact (of a multiple contact assembly) which is late to operate relative to the other contacts of the assembly
IEC E1236
Break contact delayed when closing
IEC
Passing make contact closing momentarily when its operating device is actuated or released
IEC E1232
Make contact (of a multiple contact assembly) which is early to operate relative to the other contacts of the assembly
IEC
Two way contact with center-off position
IEC E1228
Passing make contact closing momentarily when its operating device is released
E1231
IEC
ZADCO
Break contact delayed when opening
E1236A
ZADCO
Make contact delayed when opening
226C9
ZADCO
Single-pole, 4 position switch with position diagram
E1237
IEC
Self operating thermal break contact
226C10
E1238
IEC E1239
ZADCO
Break contact of a thermal relay
Change-over contact, break before make of a polarized relay
Empty
Empty
ZADCO
Single-pole, 6 position switch with a wiper that bridger only while passing from one position to the next
25 of 56
APPENDIX - 8
13. Circuit Breakers, Contactors, Plugs, Sockets And Push Buttons E1301
IEC
IEC
Disconnector (isolator)
E1309
ZADCO
Two way disconnector (isolator) without interruption of circuit
E1312
IEC
E1303
Change over switch, break before make
Switch
E1305
E1302
IEC
Contactor with automatic release
E1306
IEC
Switch disconnector (onload isolating switch)
E1310
IEC
Two way switch with center-off position
E1307
IEC
IEC
Switch disconnector (on-load isolating switch) with automatic release
E1311
Two way disconnector (isolator) with center off position
E1313
IEC
IEC
Contactor
E1314
3-position switch, normally closed (only opening when operated to the left)
26 of 56
E1304
IEC
Circuit breaker
E1308
ZADCO
Two way disconnector (isolator) with interruption of circuit
E1311A
IEC
Contactor normally closed
IEC
Mercury switch
E1315
IEC
Multi-pole plug and socket isolator, N-pole
E1316
IEC
Connector assembly fixed portion
E1320
ZADCO
E1317
IEC
Connector assembly movable portion
E1320A
E1318
IEC
Mated connectors, plug side fixed and socket side movable
ZADCO
E1320B
ZADCO
E1319
ZADCO
MCB (Miniature circuit breaker with thermal & magnetic protection)
E1321
ZADCO
MCCB (Mounded case circuit breaker with thermal & magnetic over current protection)
RCCB (Restricted current circuit breaker with thermal & magnetic over current protection and earth leakage protection)
ELCB (Earth leakage circuit breaker with earth leakage protection)
Triple pole circuit breaker e.g. air C.B fitted with 3 thermal over current relays and 3 thermo magnetic relays
E1322
E1323
E1324
E1325
ZADCO
Earth Switch
E1326
ZADCO
Rack draw-out type circuit breaker (typical for other draw-out components)
IEC
Manually operated three-pole switch 2. Multi-line reorientation
E1327
IEC
IEC
Remote control unit, rotary stack type with spring return to neutral position and padlock facility
E1328
Push - Button
IEC
Push - button with indicator lamp
27 of 56
IEC
Manually operated three-pole switch 1. Simplified singleline representation
E1329
IEC
Push - button with restricted access (glass cover, etc)
E1330
IEC
Start push button (non-locking)
E1334
ZADCO
Selector switch - 2 position
E1331
IEC
IEC
Emergency stop push button
Stop push button (non-locking)
E1335
E1332
IEC
E1336
Plug & socket (male & female)
28 of 56
IEC
Limit switch - make contact
E1333
ZADCO
Selector switch - 3 position
E1337
IEC
Limit switch - break contact
APPENDIX - 8
14. Automatic Tripping Devices, Starting Equipment And Remote-Control Units E1401
IEC
E1402
IEC
Empty
Measuring relay or related device, general
E1405-1
IEC
E1405-5
IEC
Time
E1405-9
Overspeed
Measuring relay controlled by two or more mutually dependent magnitudes
E1405-2
IEC
E1405-3
E1405-6
IEC
E1405-7
Frequency
IEC
E1405-10
IEC E1405-4
Differential current
Undervoltage
Over current
Empty
IEC
E1405-11
Phase-failure detection
29 of 56
Reverse current
IEC E1405-8
Earth-fault current
IEC
Reverse power
IEC E1405-12
Interturn short circuits
IEC
IEC
Out of synchronism (out of step)
E1405-13
Time delay
IEC
E1405-14
IEC
E1405-15
IEC E1405-16
Thermal overload (bimetal)
Inverse time lag characteristic
30 of 56
IEC
Electromagnetic
E1405-17
IEC
E1405-18
E1405-19
IEC
E1405-22
IEC E1405-20
IEC
E1405-23
IEC E1408
Direction of energy flow towards from bus bars
Direction of energy flow away from bus bars
Bi-directional energy flow
E1409
E1410
E1411
IEC
Blow out device permanent magnet type
E1413
IEC
Starter with automatic release
E1417
IEC
Auto transformer starter
IEC
Starter, general (for use on single-line diagrams)
E1414
ZADCO
Direct on-line contactor starter with protective device
E1418
IEC
IEC
Blow out device coil type
IEC E1412
Automatic starter
E1415
IEC
Flow
Fluid level
Pressure
Temperature
E1405-21
IEC
IEC
Automatic starter
IEC E1416
IEC
Direct on line contactor Series parallel starter starter for reversing motors
E1419
Star delta starter
31 of 56
IEC E1420
Pole changing starter (e.g 8/4 poles)
ZADCO
Remote control unit with ammeter controlled by rotary stack switch for use on single line diagram
E1421
ZADCO
Remote control unit with ammeter controlled by push buttons for use on single line diagrams
E1425
ZADCO
Remote control unit as E1423& E1424, but for use on layouts only
E1429
ZADCO
Emergency switch for use on layouts only
E1422
ZADCO
Remote control unit as E1420 & E1421, but for use on layouts only
E1426
ZADCO
E1423
Remote control unit without ammeter controlled by rotary stack switch for use on single line diagrams
E1427
ZADCO
E1431
Remote ammeter for use on layouts only
32 of 56
ZADCO
Emergency switch for use on single line diagrams
ZADCO E1432
Remote control unit with push buttons for use in P & ID’S
ZADCO
Remote control unit without ammeter controlled by push buttons for use on single line diagrams
ZADCO E1428
Safety switch for use on layouts only
Safety switch for use on single line diagram
E1430
ZADCO E1424
ZADCO
Remote control unit with start/stop push buttons and local/remote selector switch
APPENDIX - 8
15. Switch-gear And Distribution Boxes E1501
IEC
Switch gear, general
E1502
ZADCO
Control desk
E1503
IEC
Distribution center or bus bars with incoming and outgoing, circuits
33 of 56
E1504
IEC
Over-ground, weather proof enclosure, general symbol pillar box
APPENDIX - 8
16. Protective Devices E1601
IEC
Fuse with supply side indicated by thick line
E1605
IEC
Fuse switch disconnector (on load isolating fuse switch)
E1609
IEC
Spark gap
E1613
Link (closed)
E1602
IEC
Fuse with supply side indicated by thick line
E1606
IEC
Fuse with mechanical linkage (striker fuse)
E1610
IEC
E1614
IEC
E1607
E1604
IEC
Fuse disconnector (fuse isolator)
Fuse switch
IEC
E1608
IEC
Fuse with separate alarm contact
Fuse with alarm contact (3-terminals)
E1611
E1612
IEC
Over-voltage arrester
Lightning arrester
IEC
E1603
IEC
Link (open)
34 of 56
IEC
Protective gas discharge tube
APPENDIX - 8
17. Instruments And Metering Systems E1701
IEC
Indicating instrument, general
E1705
IEC
Telemetering transmitter
E1709
IEC
Permanent-magnet moving coil instrument
E1713
IEC
Electro-dynamic, ironless instrument
E1717
IEC
Moving -iron system
E1706
E1702
IEC
Recording instrument, general
IEC E1707
IEC
E1703
IEC
Integrating instrument, general
E1708
IEC
Telemetering receiver
E1710
IEC
Measuring instrument e.g. voltmeter for controlling telemetering transmitter
Telemetering receiver controlling a measuring instrument (e.g. voltmeter)
E1711
E1712
Permanent magnet moving coil ratio-meter (quotient meter)
E1714
E1718
Moving permanent magnet instrument
IEC E1715
Electro-dynamic, ironless ratio-meter (quotient meter)
IEC
IEC
IEC
Electro-dynamic, ironcored instrument
E1719
Moving-iron ratio-meter (quotient meter)
35 of 56
Vibrating reed instrument
IE
IEC
Moving permanent magnet ratio-meter (quotient meter)
E1716
IEC
Electro-dynamic, ironcored instrument
E1720
IEC
Electrostatic instrument
E1721
IEC
Thermal (hot wire) instrument
E1725
IEC
Accuracy class index, e.g. 1.5 with errors expressed as a percentage of the true valve
E1722
IEC
Bimetallic instrument
E1726
IEC
E1723
IEC E1724
Non-insulated thermocouple, thermal converter
E1727
IEC
Test voltage above 500 v e.g. 2kv (indication “0” for apparatus not subject to dielectric tests)
Instrument used with the supporting surface vertical
E1730
E1731
IEC
IEC
Insulated thermocouple, thermal converter
E1728
IEC
Instrument used with the supporting surface horizontal
IEC E1732
IEC
Empty Zero adjuster
E1733
IEC
Thermocouple, general (the negative pole is represented by the thicker line)
E1737
IEC
E1734
Electronic device in measuring circuit
IEC
E1735
Thermocouple, directly heated, non-insulated heating element
E1738
IEC E1736
Thermocouple indirectly heated insulated heating element
IEC
Empty
Amplifier
Single phase bridge connected rectifier
36 of 56
Electronic device in auxiliary circuit
IEC
Instrument shunt
* Note: Terminologies for use in meters applicable to E1701, E1702, E1703 1. Ampere 2. Volt 3. Differential volt 4. Double volt 5. Watt 6. Watt-hour 7. Hertz 8. Synchroscope 9. Power-factor 10. Reactive volt-ampere hour 11. Volt-ampere hour 12. OHM 13. Hour 14. Direction indicator 15. Minute 16. Second 17. Time 18. Multiples and sub-multiples Tera =1012 Giga = 109 Mega = 106 Kilo = 103 Mili = 103 Micro= 106 Nano= 109 Pico= 1012 19. Ammeter selector switch ZADCO 20. Voltmeter selector switch ZADCO 21. Selector switch ZADCO 22. Auto voltage regulator ZADCO
37 of 56
APPENDIX - 8
18. Lamp Fittings, Etc E1801
IEC
Lighting outlet position, shown with wiring
E1805
ZADCO
E1802
ZADCO
Emergency lamp fitting, maintained
E1806
E1803
ZADCO
Emergency lamp fitting, non maintained
IEC E1807
IEC
Neon (signal) lamp Discharge lamp, general
Discharge lamp (e.g. Hg =mercury, no. = sodium)
E1804
IEC
Emergency lighting luminaire on special circuit
E1808
IEC
Signal Lamp / Illuminating Lamp *
* Notes: If it is desired to indicate the color (c) a notation in accordance with IEC publication 62 is placed adjacent to the symbol e.g. RD - redBU-blue YE-yellow WH-white GN-green
AM-amber
If it is desired to indicate the type of lamp, a notation according to the following codes is placed adjacent to the symbol: Ne-neon Xe-xenon Nq-sodium vapour Hg-mercury I-iodine IN-incandescent EL-electroluminescent ARC-fluorescent FL-fluorescent IR-infra-red UV-ultra-violet LED-light-emitting diode
38 of 56
E1810
ZADCO
E1811
ZADCO
E1812
IEC
Empty
Wall mounted incandescent light fitting
Suspended incandescent light fitting
E1813
IEC
Luminaries with two fluorescent tubes
E1816
IEC
E1813A
ZADCO
E1814
Luminaries with five fluorescent tubes
E1817
ZADCO
IEC E1815
Fluorescent lamp on special circuit, e.g. emergency circuit
E1818
IEC
Spot light
IEC E1819
Navigation lamp
Flood light
Fluorescent lamp, general symbol
IEC
Electrical appliance
Flood light mounted on lighting mast
E1820
IEC
Heating element (e.g from heater)
E1824
IEC
Photodiode photo-conductive device with asymmetrical conductivity
E1821
IEC
E1822
Signal lamp, flashing type
E1825
IEC
Optical coupling device opto isolator shown with light emitting diode and photo-transistor
IEC E1823
Auxiliary apparatus for discharge lamp (e.g. ballast)
E1826
39 of 56
Light dependent resistor photo-conductive device with symmetrical conductivity
IEC E1827
Emergency lighting with battery back-up
IEC
ZADCO
Fluorescent lamp with battery back-up
E1828
ZADCO
Bulkhead light fitting
E1829
ZADCO
E1830
Lighting pole
ZADCO
Lighting pole
40 of 56
APPENDIX - 8
19.Generating Stations And Substations E1901
IEC
Generating station (power plant), general
E1905
IEC
E1902
IEC
E1903
Generating station, oil or gas
E1906
IEC E1904
Generating station, thermo-electric
IEC
E1907
IEC
Generating station hydro-electric
IEC Empty
Generating station oil or gas with gas turbine
Plant station
Substation, general (e.g. intake station
GENERATING STATIONS AND SUBSTATIONS (IN SERVICE)
E1911
IEC
Generating station (power plant), general
E1915
IEC
Generating station oil or gas with gas turbine
E1912
IEC
E1913
Generating station, thermo-electric
Generating station, oil or gas
E1916
IEC
IEC E1914
E1917
Substation, general (e.g. intake station)
41 of 56
Plant station
IEC
Generating station hydro-electric
IEC E1918
IEC
Rectifier substation
APPENDIX - 8
20. Signaling Equipment And Clocks E2001
IEC
Bell, electric, general
E2005
E2013
E2003
IEC
IEC
E2007
E2011
Mechanical indicator
IEC
Common alarm indication
42 of 56
IEC
Siren, electric, general
IEC E2008
Clock, general
Synchronous clock (e.g. 50 HZ)
IEC E2014
IEC E2004
Horn, electric, general
Electro mechanical indicator with alarm con tact
IEC E2010
Time - switch
IEC
Buzzer, electric, general
IEC E2006
Electromechanical position indicator with one de-energized and two operating positions
E2009
E2002
IEC
Master clock
IEC E2012
Clock with an electric motor rewind
ZADCO
Drop enunciator make contact actuated by the actuating system, make contact actuated by the target
APPENDIX - 8
21. Protection Relay Symbols 2 1 .1 D e v i c e Fu n c t i o n N u m b e r s , In d i c a t i n g T h e D e v i c e F u n c t i o n W h i c h Causes Relay Operate
E2101
IEEE
IEEE
4. Master contactor
E2101
IEEE
8. Control power disconnecting device
E2101
IEEE
12. Over-speed device
E2101
IEEE
16. Reserved for future application
E2101
IEEE
E2101
5. Stopping device
E2101
IEEE
IEEE
13. Synchronous-speed device
E2101
IEEE
6. Starting circuit breaker
E2101
9. Reversing device
E2101
IEEE
2. Time-delay starting or closing relay
1. Master element
E2101
E2101
IEEE
IEEE
10. Unit sequence switch
E2101
IEEE
14. Under-speed device
E2101
17. Shunting or discharge switch
43 of 56
IEEE
18. Accelerating or decelerating device
E2101
IEEE
3. Checking or interlocking relay
E2101
IEEE
7. Rate-of-change relay
E2101
IEEE
11. Multifunction device
E2101
IEEE
15. Speed or frequency matching device
E2101
IEEE
19. Starting-to-running transition contactor
E2101
IEEE
20. Electrically operated valve
E2101
IEEE
24. Volts per hertz relay
E2101
IEEE
28. Flame detector
E2101
IEEE
IEEE
25. Synchronizing or synchronism-check device
E2101
IEEE E2101
22. Equalizer circuit breaker
21. Distance relay
E2101
E2101
IEEE
29. Isolating contactor
E2101
E2101
IEEE
27. Under-voltage relay
IEEE E2101
30. Annunciator relay
44 of 56
23. Temperature control device
IEE E2101
26. Apparatus thermal device
IEEE
IEEE
31. Separate excitation device
APPENDIX - 8 2 1 .2 D e v i c e Fu n c t i o n N u m b e r s , In d i c a t i n g T h e D e v i c e F u n c t i o n W h i c h Causes Relay Operate
E2101
IEEE
32. Directional power relay
E2101
IEEE
36. Polarity or polarizing voltage device
E2101
IEEE
40. Field relay
E2101
IEEE
44. Unit sequence starting relay
E2101
IEEE
48. Incomplete sequence relay
E2101
IEEE
E2101
33. Position switch
E2101
IEEE
34. Master sequence device
E2101
IEEE
E2101
E2101
IEEE
E2101
45. Atmospheric condition monitor
E2101
IEEE
49. Machine or transformer thermal relay
E2101
45 of 56
IEEE
47. Phase-sequence or phase-balance voltage relay
IEEE E2101
50. Instantaneous overcurrent relay
IEEE
43. Manual transfer or selector device
IEEE E2101
46. Reverse-phase or phase-balance current relay
IEEE
39. Mechanical condition monitor
IEEE E2101
42. Running circuit breaker
41. Field circuit breaker
IEEE
35. Brush-operating or slip-ring shortcircuiting device
IEEE E2101
38. Bearing protective device
37. Undercurrent or under power relay
E2101
IEEE E2101
IEEE
51. AC time overcurrent relay
E2101
IEEE
52. AC circuit breaker
E2101
IEEE
E2101
53. Exciter or DC generator relay
46 of 56
IEEE E2101
54. Turning gear engaging device
IEEE
55. Power factor relay
E2101
IEEE
56. Field application relay
E2101
IEEE
57. Short-circuiting or grounding device
E2101
IEEE E2101
58. Rectification failure relay
47 of 56
IEEE
59. Over-voltage relay
APPENDIX - 8 2 1 .3 D e v i c e Fu n c t i o n N u m b e r s , In d i c a t i n g T h e D e v i c e F u n c t i o n W h i c h Causes Relay Operate
E2101
IEEE
60. Voltage or current balance relay
E2101
IEEE
64. Ground detector relay
E2101
IEEE
68. Blocking relay
E2101
IEEE
73. Load-resistor contactor
E2101
IEEE
77. Telemetering device
E2101
IEEE
E2101
62. Time-delay stopping or opening relay
61. Density switch or sensor
E2101
IEEE
E2101
65. Governor
E2101
IEEE
E2101
IEEE
E2101
E2101
IEEE
E2101
78. Phase-angle measuring relay
48 of 56
IEEE
76. DC over-current relay
IEEE E2101
79. reclosing relay
IEEE
71. Level switch
IEEE E2101
75. Position changing mechanism
74. Alarm relay
IEEE
67. AC directional over-current relay
IEEE E2101
70. Rheostat
IEEE
63. Pressure switch
IEEE E2101
66. Notching or jogging device
69. Permissive control device
E2101
IEEE E2101
IEEE
80. Flow switch
E2101
IEEE
81. Frequency relay
E2101
IEEE
85. Carrier or pilot-wire relay
E2101
IEEE
82. DC load-measuring reclosing relay
E2101
IEEE
E2101
IEEE E2101
83. Automatic selective control or transfer relay
E2101
86. Lockout relay
49 of 56
84. Operating mechanism
IEEE E2101
87. Differential protective relay
IEEE
IEEE
88. Auxiliary motor or motor generator
APPENDIX - 8 2 1 .4 D e v i c e Fu n c t i o n N u m b e r s , In d i c a t i n g T h e D e v i c e F u n c t i o n W h i c h Causes Relay Operate
E2101
IEEE
89. Line switch
E2101
IEEE
E2101
IEEE
90. Regulating device
E2101
E2101
IEEE E2101
91. Voltage directional relay
IEEE
IEEE
92. Voltage and power directional relay
E2101
IEEE
95, 96, 97, 98, 99
93. Field-changing contactor
94. Tripping or trip-free relay Used only for specific applications in individual installations if none of the functions assigned to the numbers from 1 to 94 is suitable
50 of 56
APPENDIX - 8
22. Building Electrical Installation (Light Switches) E2201
ZADCO
E2202
ZADCO
E2203
ZADCO E2204
5A, one way, single pole switch to identify the number of gangs use: 1G, 2G, 3G, and 4G
20/15A, one way, single pole switch to identify the number of gangs use: 1G, 2G, 3G, and 4G
SA, two way, single pole switch to identify the number of gangs use: 1G, 2G, 3G and 4G
E2205
E2206
E2207
ZADCO
ZADCO
ZADCO
20/15A two way, single pole switch to identify the number of gangs use: 1G, 2G, and 4G
ZADCO
Empty 5A, intermediate way switch to identify the number of gangs use: 1G, 2G, 3G, and 4G
E2209
ZADCO
One way, double pole switch
20/15A, intermediate way switch to identify the number of gangs use: 1G, 2G, 3G, and 4G
Switch, period limiting
E2210
E2211
ZADCO
Metal clad one way, single pole switch
E2214
ZADCO
ZADCO E2212
Metal clad one way, double pole switch
E2215
ZADCO
Water tight single pole switch
IEC E2216
ZADCO
Empty Pendant switch
E2217
ZADCO
15A switched socket outlet
E2218
Dimmer
ZADCO
E2219
Multiple switched socket out let (e.g. 2 plugs)
51 of 56
13A switched socket out let
ZADCO E2220
110V switched socket outlet
ZADC
24V switched socket outlet
E2221
ZADCO
Welding socket outlet
E2226C
ZADCO
Mirror light with shaver outlet
E2225
IEC
Plug
E2226G
ZADCO
Switched fused spur unit without outlet
E2228
ZADCO
Bell push
E2232
ZADCO
Smoke detector
E2222
ZADCO
Switched fused spur unit with outlet
E2226D
ZADCO
E2223
Telephone socket outlet
E2226E
2 Pole isolator
E2226
ZADCO
E2226A
Fused spur unit with outlet
E2229
ZADCO
E2226J
Bell indicator N=NO. of ways
E2233
ZADCO
3 Pole & neutral isolator
Heat detector
IE
Electric bell
ZADCO E2231
IE
Buzzer
IEC E2235
Fire alarm break glass unit (manually operated)
52 of 56
ZADC
Shaver outlet
Bell transformer
E2234
ZADC
ZADCO E2227
Fused spur unit without outlet
E2230
TV socket outlet
ZADCO E2226B
45A flex outlet
ZADCO
ZADC
ZADCO E2226F
3 Pole isolator
20A flex outlet
E2226H
ZADCO E2224
ZADC
Fire and gas control panel
E2236
ZADCO
Automatic fire detection
E2237
ZADCO
E2238
Self contained water heater
E2241
ZADCO
ZADCO E2239
Thermostat
E2242
ZADC
Telephone junction box
ZADCO E2243
ZADCO
Empty Exhaust fan wall mounted
Switch board / distribution board fuse board
E2244
ZADCO
Fan regulator
E2245
ZADCO
Cooker control unit
E2246
ZADCO E2247
Main distribution board
53 of 56
Exhaust fan roof mounted
ZADCO
Ceiling fan
APPENDIX - 8
23. Electro Acoustic Elements E2301
ZADCO
E2302
Microphone
E2305
Pickup
ZADCO
ZADCO
E2303
ZADCO
Loudspeaker
Earphone
E2306
ZADCO E2304
Two way intercom system
ZADCO
Sound recorder
54 of 56
24 Cathodic Protection E2401
ZADCO
Transformer rectifier
E2402
ZADCO
E2403
Current control box
55 of 56
ZADCO E2404
Borehole grounded
ZADCO
Horizontal grounded
