Specifications

L2234
L2778
L4681
L5179
Emax
155/161
Doc. No
Model
Apparatus
Scale
Page No
1SDH000460R0002
L5439
Circuit diagram symbols (IEC 60617 and CEI 3-14 ... 3-26 Standards)
Shield
(may be drawn
in any shape)
Time delay
Mechanical or electrical
connection
Manual mechanical control
(general case)
Rotating control
Pushbutton control
Equipotentiality
Terminal
Plug and socket
(male and female)
Motor
(general symbol)
Current transformer
Voltage transformer
Winding of three-phase tran-
sformer, Star connection
Change-over position contact
with momentary circuit brea-
king (limit contact)
Power isolator with automatic
breaking action
Switch-disconnector
Control coil
(general symbol)
Instantaneous overcurrent
relay
Overcurrent relay with adju-
stable short time-delay trip
Galvanically separated
converter
Shielded cable conductors
(i.e., 3 conductors shown)
Conductors or stranded
cables (i.e., 3 conductors
shown)
Connection of conductors
Make contact
Break contact with
automatic circuit
breaking
Change-over contact
Make position contact (limit
contact)
Break position contact (limit
contact)
Overcurrent relay with inverse
short time-delay tripa tempo
breve inverso
Overcurrent relay with inverse
long time-delay trip
Earth fault overcurrent relay
with inverse short time delay
Fuse (general symbol)
Current sensor