Operating Instructions

SED2 VFD Startup, Operation, and Maintenance Manual
24 Siemens Building Technologies, Inc.
Input Power and Motor Connections
DANGER:
• Make certain that the motor rated full load amps (FLA)
does NOT exceed the rated output current of the
SED2 controlling it.
When multiple motors are simultaneously operated by
the SED2, the sum of all motor rated FLA values must
be less than or equal to the SED2 controlling them.
• Never switch on the SED2 with it open.
• Always isolate the input power cables before
connecting them to the SED2.
• Always use insulated tools when working on input
power and motor terminals.
• Ensure that terminal covers are securely replaced
after connecting the input power and motor cables.
WARNING:
• Verify that the SED2 and motor are correctly rated for
the input power voltage.
• Verify that the input power cables are correctly sized
for the anticipated use.
• Confirm that appropriate circuit breakers or fuses have
been installed between the input power supply and the
SED2.
• Never use high-voltage insulation test equipment on
any cables connected to the SED2.