Specifications

SED2 VFD Startup, Operation, and Maintenance Manual
118 Siemens Building Technologies, Inc.
EMI
Electromagnetic Interference.
Fixed Frequency
Frequency setpoints that are based on selection of 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 (12mm) 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 and Motor temperature Sensor parameter
P0601.
Motor Pole Pairs
One of the pole pairs is called a winding.
NEMA Type 1
NEMA Type 1 SED2s include gland plates (frame sizes A through C) and
protection shields. An enclosure with a NEMA Type 1 rating is intended
for indoor use, primarily to provide a degree of protection against contact
with the enclosed equipment or for locations where unusual service
conditions do not exist. NEMA Type 1 enclosures protect the operator
from electric hazard and protect the equipment from falling material.