Pulse Frequency - Siemens SED2 VFD NEMA Operating Instructions Manual

Pulse Frequency

Parameter Description
P1800
Pulse Frequency
Sets pulse frequency (kHz) of
power switches in SED2. The
frequency can be changed in
increments of 2 kHz.
Pulse frequencies > 4 kHz
selected on 380V to 480V units
reduce the maximum continuous
motor current.
NOTES:
1. Minimum pulse frequency depends on P1082 (maximum frequency) and P0310 (rated motor frequency).
2. At 4 kHz, full output current is obtained up to 50 degrees C (CT mode); over 50 degrees C, full output may be
obtained at 8 kHz.
3. If silent operation is not absolutely necessary, lower pulse frequencies may be selected to reduce SED2 losses
and radio-frequency emissions.
4.
Under certain circumstances, the SED2 may reduce the switching frequency to provide protection against over-
temperature.
Siemens Building Technologies, Inc.
Action
1. Press to enter the SED2
parameter mode and to r0000.
2. Press to advance to
parameter P1800.
3. Press to access the
parameter values level.
4. Press to advance to
desired value.
5. Press to confirm and save
the setting.
Startup Procedures
Setting/Default
Minimum = 4
Default = Varies by
model (hp/voltage
dependent)
Maximum = 16
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