Symbols used in Power Systems
-
Upload
bogdan-teodorescu -
Category
Documents
-
view
22 -
download
3
description
Transcript of Symbols used in Power Systems
-
Sponsored by
Single phase
Line or cable Three phase
Line or cable
Short
circuit
Earth
electrode
Outgoing feeder Supply incoming
feeder
CIRCUIT DIAGRAM SYMBOLS USED IN
DISTRIBUTION SYSTEMS
-
EXAMPLE : Danger of short circuit
-
Sponsored by
Resistor Variable
resistor
Reactor or transformer,
motor or generator
winding
Iron core
reactor
Capacitor
Impedance
(Z, R, L, or C)
CIRCUIT DIAGRAM SYMBOLS USED IN
DISTRIBUTION SYSTEMS (Cont.)
-
Sponsored by
Star connected
winding
Delta connected
winding
Varistor or
surge
arrester
Spark gap or
overvoltage
limiter
Diode
Thyristor
CIRCUIT DIAGRAM SYMBOLS USED IN
DISTRIBUTION SYSTEMS (Cont.)
-
Sponsored by
Inverter Rectifier
Source of
current Metering
Measuring
device Electrical power
outlet
CIRCUIT DIAGRAM SYMBOLS USED IN
DISTRIBUTION SYSTEMS (Cont.)
JM
-
Sponsored by
Isolator
Fuse Switch fuse
Circuit
breaker
Circuit-breaker fitted with a
(thermal) overload and
(magnetic) short-circuit trip relay
CIRCUIT DIAGRAM SYMBOLS USED IN
DISTRIBUTION SYSTEMS (Cont.)
Switch
disconnecter
-
345 kV Switch Disconnecter
500 kV Switch Disconnector
EXAMPE : Opening HV switch disconnectors
-
Sponsored by
Contactor Fuse contactor
Drawout
circuit
breaker
Changeover switch
Changeover
circuit breaker Transformer
CIRCUIT DIAGRAM SYMBOLS USED IN
DISTRIBUTION SYSTEMS (Cont.)
-
Sponsored by
Transformer fitted
with an on-load tap
changer
Voltage
transformer
Artificial or
earthing
transformer
Battery
Current
transformer AC generator or
alternator
CIRCUIT DIAGRAM SYMBOLS USED IN
DISTRIBUTION SYSTEMS (Cont.)
G
AG MAsynchronous
generator Motor
-
SOME ABREVIATIONS
UPS : Uninterruptible Power Supply
N : Neutral
NC : Normally Closed
NO : Normally Open
-
EXAMPLE SYSTEM
-
EXAMPLE SYSTEM (Cont.)
-
EXAMPLE SYSTEM (Cont.)