Operating Instructions

SED2 VFD Startup, Operation, and Maintenance Manual
124 Siemens Building Technologies, Inc.
EMC
Electromagnetic Compatibility.
EMI
Electromagnetic Interference.
Fixed Frequency
Frequency setpoints that are based on selecting a predetermined
source.
Flying Start
Starts SED2 onto a spinning motor by rapidly changing the output
frequency of the SED2 until the actual motor speed has been found.
Then, the motor runs up to setpoint using the normal ramp time.
Inverter
Another term for a variable frequency drive (VFD).
IP20
IP20 is the enclosure rating for the standard SED2 from Europe; there
is no equivalent North American enclosure rating. An enclosure with
an IP20 rating is protected against penetration of solid objects greater
than 0.47 inches (12 mm) and it is protected against vertically falling
drops of water such as from condensation.
Mains
Another term for input line power.
Motor I
2
t Temperature
Provides a model for estimating the thermal motor value; used for
internal motor overload protection. Also see Motor I
2
t Temperature
Reaction parameter P0610; Motor temperature Sensor parameter
P0601.
Motor Pole Pairs
One of the pole pairs is called a winding.