ABB MS116 - 8 Glossary

MANUAL MOTOR STARTER GUIDE
APRIL 19 76/80
8. Glossary
AC Alternating current
Active power The power consumed by the motor which is converted into mechanical action.
Ambient temperature
Ambient temperature is the temperature of water, air or surrounding medium where the
equipment is used or stored.
DC
Direct current.
Delta connection
The connection type of a motor where the windings are connected in a delta.
Efficiency
The ratio between mechanical output and electrical input. The percentage given indi-
cates how effective the motor is at converting electrical energy to mechanical energy.
Frequency
The number of periodic cycles per unit of time.
FLA
Full Load Amps (sometimes also FLC= Full Load Current), rated-current at rated-load and
rated-voltage. This is the amount of current (amps) the motor will draw from the electri-
cal system when producing its rated output horsepower.
I
cm
Rated short-circuit making capacity, see also chapter: 2.2.2 Rated short-circuit making
capacity (Icm)
I
cu
Rated service short- circuit braking capacity, see also chapter: 2.2.3.1 Rated ultimate
short-circuit breaking capacity (Icu) acc. to IEC / EN 60947-2.
I
cs
Rated service short-circuit breaking capacity, see also chapter: 2.2.3.2 Rated service
short-circuit breaking capacity (Ics) acc. to IEC / EN 60947-2.
I
cw
Rated short-time withstand current, see also Chapter: 2.2.4 Rated short-time withstand
current (Icw).
I
e
The tripping characteristic of the instantaneous short-circuit releases is based on the
rated operational current I
e
, which, in the case of the manual motor starter, is the same
as the upper value of the setting range.
IE3
Premium-efficiency class for single-speed motors according to IEC 60034-30.
IE4
Super Premium-efficiency class for single-speed motors according to IEC 60034-30 ver-
sion 2014
IEC
International Electrotechnical Commission which is part of the International Standard Or-
ganization.
Inertia
A measure of a body’s resistance to change in velocity whether the body is moving at a
constant speed or is at rest. The velocity can be rotational or linear.
Inrush peak
A short, high-current transient occurring during the first milliseconds when the motor is
started.
LED Light-emitting diode.
Load torque
The braking torque on the motor shaft caused by the load. If the braking torque is equal
or nearly equal to the rated motor torque it can be defined as high load torque.
MEPS
Minimum Energy Performance Standard: a local regulation specifying the minimum re-
quired energy performance for energy using products. In Europe the EU MEPS for direct
on-line motors is IE3.
MMS
Manual motor starter.
N-end
The end that is normally the non-drive end of an electrical motor.
NEMA
The National Electrical Manufacturers Association (USA).
Network
Several nodes connected to each other with some type of communication medium. A
network can be of single link type or multiple link type.