ABB PSTX30 Installation And Commissioning Manual page 18

This chapter describes the softstarter in general,
specifications as well as available accessories and spare
parts.
3.1 Overview
The PSTX softstarter is designed with the latest
technology for soft start and soft stop of squirrel cage
motors. The softstarter has several advanced motor
protection features as standard.
Bypass
3
Softstarter range PSTX30...370 have integrated by-pass
components. For PSTX210...370, this is a three phase
by-pass contactor. In an emergency case, it is possible to
start the motor DOL with this contactor.
User interface
The keypad on the front is designed with Navigation keys,
Selection softkeys, Start and Stop keys, Local or Remote
key, Information key and a clear information display. It is
possible to choose between 15 different user languages.
The softstarter can be controlled in three different ways:
• Hardwire inputs control
• Keypad control (either attached to the softstarter front
or detached and connected with the cable included)
• Fieldbus communication interface (by built in Modbus,
Anybus module or the FieldBusPlug with adapter)
Only one type of control method can be enabled
simultaneously. Default selection is hardware
control.
Keypad control has the highest priority and
overrides all other control methods.
Fans
The integrated fans for cooling are running only during
ramping (start/stop) and when the heat sink temperature
is above a certain level. The temperature is monitored by
a thermistor.
3.1.1 Operation functions
Available functions are listed below:
• Voltage ramp start
• Voltage ramp stop
• Torque ramp start
• Torque ramp stop
• Full voltage start
• Direct stop
• Stand still brake
• Normal current limit
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
• Dual current limit
• Ramp current limit
• Kick start
• Slow speed
• Motor heating
• Sequence start
• Automatic restart
• Small motor mode
• Fire mode
• Limp mode
• Pump cleaning
3.1.2
The PSTX softstarter is equipped with a number of
protection functions to protect the softstarter, motor
and other equipments. All protections can be set to
have automatic reset or manual reset. Protection can be
enabled or disabled by the user.
Available protections are listed below:
• EOL protection
• Locked rotor protection
• Phase reversal protection
• Current imbalance protection
inputs
• Over voltage protection
• Under voltage protection
• Earth fault protection
• Voltage imbalance protection
• Voltage outputs protection
• External thermal sensor - PT100 protection
• External thermal sensor - PTC protection
• Power factor underload protection
• Current underload protection
• User defined protection
• Too long current limit protection
• By-pass open protection
• Fieldbus failure protection
• Extension IO failure protection
• HMI failure protection
• Limit number of starts
Protection functions