Softstarters Type PSE18...PSE370 Installation and commissioning manual 1SFC132057M0201
10 Chapter 1
1.2.3 Acronyms and abbreviations
The acronyms and abbreviations described in table 1.1 are used in this manual.
Table 1.1
Acronym/ abbre-
viation
Description
BP
By-pass
DOL
Direct-on-line
EOL
Electronic overload protection for the Motor
FB
Fieldbus
FBP
FieldBusPlug
HMI
Human-Machine Interface
Ie
Rated operational current
IT
Information Technology
LCD
Liquid Crystal Display
LED
Light Emitting Diode
PCB
Printed Circuit Board
PLC
Programmable Logic Controller
PTC
Positive
Temperature Coefficient
SC
Short Circuit
SCR
Silicon Controlled Rectifier (
thyristor)
TOR
Top of Ramp (full voltage/Full-On)
Uc
Rated control circuit voltage *
Ue
Rated operational voltage *
Us
Rated control supply voltage *
*) For definition see
IEC 60947-1 edition 5.0
1.2.4 Explanation of concepts
The setting of current Ie is the setting for the rated operational current (main cur-
rent) of the motor.
Ue = Rated operational voltage on the motor’s operational current (three phase
main voltage feeding the motor).
Us = Rated control supply voltage, feeding the electronics in the softstarter.
Uc = Rated control voltage, used for controlling the softstarter.