L2234
Emax
152/158
Doc. No.
Model
1SDH000460R0002
Apparatus
Scale
Page No.
L2778
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
transformer, Star connection
Change-over position contact
with momentary circuit
breaking (limit contact)
Power isolator with automatic
breaking action
Switch-disconnector
Control coil
(general symbol)
Instantaneous overcurrent relay
Overcurrent relay with
adjustable 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
long time-delay trip
Earth fault overcurrent relay
with inverse short time delay
Fuse (general symbol)
Current sensor
Overcurrent relay with inverse
short time-delay trip