Siemens SIRIUS 3RW55 - 7.10 Emergency Start

Functions
7.10 Emergency start
SIRIUS 3RW55 soft starter
Manual, 08/2018, A5E35630887002A/RS-AB/002
131
7.10
Emergency start
Operating principle
With the emergency start function the system can continue to be operated in the case of
system faults. This is necessary for systems in which the product becomes unusable without
continued operation, e.g. glue and paint production. In crusher plants, in which a
disconnection makes any further startup impossible in certain situations, continued operation
is also necessary.
The emergency start is activated only if it has been enabled and a trip command exists due
to a system fault. The motor is switched on by means of a normal control command.
NOTICE
Damage to the system
If the emergency start function is activated, both system defects and system protection
messages are ignored. This can cause further damage in the system.
In the case of some faults, the motor can be started via the emergency start function despite
a pending group error:
● Phase asymmetry limit exceeded
● Motor overload protection
● Temperature sensor wire break
● Temperature sensor short-circuit
● Temperature sensor overload
● Maximum starting time exceeded
● I
e
upper/lower limit value violation
● Ground fault detected
● Impermissible I
e
Class setting