103/1 08
. 1SDH000635R0002
Page No., conductors shown) Currentsensor
/ -
Earthfault overcurrent relay
with inverse short time delay
M odel L3447 Emax Scale
D m°.e..Circuit diagram symbols (IEC 60617 and CEI 3-14 .. 3-26 Standards)
Shield
(may drawn
in any shape)
Terminal Change-overposition contact
• with momentary circuit
breaking (limit contact)
Time delay Plug and socket Power isolatorwith automatic
(male and female) breaking action
Mechanical electrical
connection
A Motor Switch-disconnector
(V) (general symbol)
Manual mechanical control
(general case)
j Make contact Control coil
(general symbol)
J -
Rotating control Breakcontactwith
automatic circuit
breaking
Instantaneousovercurrent relay
E— -
Pushbutton control Change-over contact Overcurrent relaywith
adjustable short time-delay
trip
Equipotentiality Make position contact (limit
contact) -
Overcurrent relaywith inverse
short time-delay trip
Galvanically separated
converter
Break position contact (limit
contact) -
Overcurrent relaywith inverse
long time-delay trip
Shielded cable conductors
(i
