Breakaway Pulse For Startup Functions - Siemens SIRIUS 3RW55 Equipment Manual

Functions
8.1 Start-up
Assign your own parameter set for the motor heating to enable you to switch quickly and easily
between the motor heating and the actual start-up.
Application
• Used for drives outdoors to minimize condensation inside the motor.
Validity
This starting mode is not available for the 3RW55 Failsafe soft starter.
Setting via 3RW5 HMI High Feature
• Menu: "Parameters > Soft Starter > Parameter set 1 / 2 / 3 > Start settings > Starting mode >
Motor heating"
• Menu (Parameters): "Parameters > Soft Starter > Parameter set 1 / 2 / 3 > Start settings"
• Access protection to the 3RW5 HMI High Feature is not active or has been reset.
Parameters
NOTICE
Damage to property through motor heating in continuous operation
The starting mode "motor heating" is not a continuous operating mode. The motor must be
equipped with a temperature sensor to ensure motor protection. The motor model with
integrated electronic motor overload protection is not suitable for this kind of operation.
Parameters
Motor heating power
8.1.9

Breakaway pulse for startup functions

Operating principle
It may be necessary to create a breakaway pulse at the beginning of the machine's starting
process. Using the breakaway pulse, the high limiting friction of the load can be overcome and
the machine can be set into motion. The breakaway pulse is used in conjunction with the starting
modes "Voltage ramp", "Torque control", or "Current limiting" and overlays this during the set
breakaway time.
144
Description
Set the parameter so that the motor is not damaged. 100% motor heating
power corresponds to a comparable motor current of about 30% of the
rated motor current.
• Factory setting: 20%
• Setting range: 1 ... 100%
• In steps of: 1%
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters